Abstract

Embodiments of this application disclose a motor control unit, a powertrain, and an electric vehicle. Bridge arm midpoints of the three bridge arms of the inverter are respectively connected to three phase windings of a drive motor. In response to a current frequency of at least one phase winding being greater than or equal to a first frequency threshold, three upper bridge switching transistors or three lower bridge switching transistors switch from an alternate conduction mode to a continuous conduction mode or a continuous cutoff mode. In response to a current frequency of at least one phase winding being less than a second frequency threshold, the three upper bridge switching transistors and the three lower bridge switching transistors switch from an alternate conduction mode to a continuous cutoff mode. In embodiments of this application, control accuracy of the motor control unit can be improved.

IPC Classes  ?

• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage

Abstract

A wheel brake apparatus and an electromechanical brake system with a function of over-temperature protection for a brake motor, and an electric vehicle. The wheel brake apparatus includes a service brake unit, a parking brake unit, and a wheel controller. In a braking process of the electric vehicle, the wheel controller is configured to: in response to that a winding temperature of a brake motor is greater than or equal to a first temperature, control the brake motor to reduce an output torque, and control the parking brake unit to output a brake force for parking. The wheel brake apparatus and the electromechanical brake system can increase an operating life of the brake motor and improve operation reliability of the electric vehicle.

IPC Classes  ?

• B60T 17/22 - Devices for monitoring or checking brake systemsSignal devices
• B60T 13/74 - Transmitting braking action from initiating means to ultimate brake actuator with power assistance or driveBrake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive

Abstract

Provided in the present application are an electronic mechanical braking system, a wheel end braking apparatus and an electric vehicle. The electronic mechanical braking system comprises two central controllers and four wheel end braking apparatuses, wherein the two central controllers correspond to two braking pedal sensors on a one-to-one basis, each central controller is used for receiving a braking pedal signal that is output by the braking pedal sensor corresponding to the central controller, and the braking pedal signal is used for indicating a motion state of a braking pedal; and the four wheel end braking apparatuses are used for outputting braking force to brake an electric vehicle. In the electronic mechanical braking system provided in the present application, braking control redundancy of the electric vehicle is realized by means of providing the two braking pedal sensors and the two central controllers, and when one of the sensors or one of the central controllers fails, the electronic mechanical braking system can still accurately brake the electric vehicle, thereby improving the braking safety and reliability of the electronic mechanical braking system.

IPC Classes  ?

• B60T 17/18 - Safety devicesMonitoring
• B60T 13/74 - Transmitting braking action from initiating means to ultimate brake actuator with power assistance or driveBrake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive

Abstract

The present application provides an energy storage system. The energy storage system comprises at least one energy storage device, at least one power conversion system, and an energy management system. The energy management system is communicatively connected to the at least one energy storage device, and the energy management system is communicatively connected to the at least one power conversion system. Each energy storage device comprises at least one battery cluster and at least one battery control unit, each battery control unit is communicatively connected to the at least one power conversion system, and each battery control unit is communicatively connected to a corresponding battery cluster in a one-to-one correspondence manner, and is used for monitoring operation information of the battery cluster, sending the operation information of the battery cluster to the energy management system, and sending the operation information of the battery cluster to the at least one power conversion system. The energy management system is used for issuing a control instruction to the at least one power conversion system and the at least one energy storage device, and the at least one power conversion system is used for performing charging and discharging control on the at least one energy storage device. By using the present application, the response speed of the energy storage system and that of the energy storage device can be increased, the application range of the energy storage system and that of the energy storage device are expanded, the manual operation and maintenance costs are reduced, and the requirement for rapid charging and discharging of the battery cluster is satisfied.

IPC Classes  ?

• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means

Abstract

Provided in the embodiments of the present application are a charging system and a charging method. The charging system comprises a plurality of charging devices, a plurality of energy storage devices and at least one switch module, wherein each charging device comprises an alternating-current to direct-current (AC-DC) conversion apparatus, a DC bus and a DC-DC conversion apparatus, the AC-DC conversion apparatus being used for converting an AC into a DC and outputting the DC into the DC bus, and the DC-DC conversion apparatus being used for acquiring the DC from the DC bus, performing power conversion, and then outputting the DC to a load; and each energy storage device is connected to the DC bus of each charging device by means of at least one switch module, such that power transmission is performed between each energy storage device and the DC bus of each charging device. In the embodiments of the present application, each energy storage device in the charging system can flexibly distribute power to a plurality of charging devices, thereby increasing the utilization rate of energy storage resources in the charging system.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

Provided are an energy storage cabinet (100), an energy storage system, a battery pack (200), and a battery support. The energy storage cabinet (100) comprises a cabinet body (110), a battery pack (200), and two guide rails (140) arranged opposite one another in the length direction (X) of the cabinet body (110). The cabinet body (110) is used for accommodating the guide rails (140) and the battery pack (200), the cabinet body (110) is provided with a cabinet door, and the two guide rails (140) extend in the width direction (Y) of the cabinet body (110). Each guide rail (140) among the two guide rails (140) is provided with a recess (141) extending in the width direction (Y), and the opening directions of the recesses (141) are opposite one another and face the interior of the cabinet body (110). The opening widths of the recesses (141) of the guide rails (140) at an end close to the cabinet door in the height direction (Z) of the cabinet body (110) are greater than the opening widths of the recesses (141) at the other end of the guide rails (140), and the surfaces of two side walls of the battery pack (200) are provided with protruding limiting blocks (220). The limiting blocks (220) are engaged in the recesses (141), and parts in the recesses (141) at narrowed opening widths are used for pressing against the limiting blocks (220) in the width direction (Y). The guide rails (140) can provide constraint in the width direction (Y) for the battery pack (200), limit the displacement of the battery pack (200) in the horizontal direction, and can prevent damage to the battery pack (200) and the energy storage cabinet (100) due to vibration during transportation of the battery pack (200).

IPC Classes  ?

• H01M 50/242 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
• H01M 50/204 - Racks, modules or packs for multiple batteries or multiple cells
• H01M 50/244 - Secondary casingsRacksSuspension devicesCarrying devicesHolders characterised by their mounting method
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means

Abstract

The present application provides a circuit breaker and a power device. The circuit breaker comprises a housing, an operating handle, an operating mechanism, a current conducting assembly, and an arc extinguishing chamber. The operating handle, the operating mechanism, the current conducting assembly, and the arc extinguishing chamber are sequentially arranged in the depth direction of the circuit breaker. The current conducting assembly comprises a moving contact assembly and a static contact. The operating mechanism is connected to the moving contact assembly. The operating handle is used for controlling the operating mechanism to drive the moving contact assembly to move, so that a moving contact is in contact with or separated from the static contact. The arc extinguishing chamber is used for eliminating an electric arc generated when the moving contact is separated from the static contact. The moving contact assembly comprises a gas-generating connecting rod and the moving contact which are relatively fixed. The gas-generating connecting rod is provided with a blocking plate, used for covering an opening between the operating mechanism and the arc extinguishing chamber. During the separation of the moving contact and the static contact, the blocking plate can always separate the operating mechanism from the arc extinguishing chamber, thereby preventing the operating mechanism from being electrified due to the electric arc generated when the moving contact is separated from the static contact being ejected onto the operating mechanism, and thus improving the safety of the circuit breaker.

IPC Classes  ?

• H01H 71/02 - HousingsCasingsBasesMountings
• H01H 73/18 - Means for extinguishing or suppressing arc
• H02B 1/04 - Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing

Abstract

Provided in the embodiments of the present application are a heat dissipation apparatus based on submergence phase-change liquid cooling technology, and an electronic device. The heat dissipation apparatus comprises a side wall and a plurality of liquid absorption columns, wherein the side wall encloses a cavity having two open ends; at least part of each liquid absorption column is located in the cavity, one end of each liquid absorption column is connected to one side of the inner surface of the side wall, and each liquid absorption column extends from one side of the inner surface to the opposite side; and each liquid absorption column comprises a porous structure. The electronic device comprises a housing, a cooling liquid, a heating device and the heat dissipation apparatus, wherein the cooling liquid, the heating device and the heat dissipation apparatus are all accommodated in the housing; the heating device and the heat dissipation apparatus are both submerged in the cooling liquid; and the heating device is fixed to the side of the side wall away from the liquid absorption columns. The embodiments of the present application can achieve efficient heat dissipation.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

An energy storage device (1000) and a photovoltaic energy storage system. A thermal management system (400) of the energy storage device (1000) comprises a compressor (410), a condenser (420), an expansion valve (430), a dehumidification module (450), and a first evaporator (440), wherein the dehumidification module (450) comprises a second evaporator (4501). A refrigerant outlet (4102) of the compressor (410) is connected to a refrigerant inlet (4201) of the condenser (420), and a refrigerant outlet (4202) of the condenser (420) is connected to a refrigerant inlet (4301) of the expansion valve (430). A refrigerant outlet (4302) of the expansion valve (430) is connected to a refrigerant inlet (45011) of the second evaporator (4501), a refrigerant outlet (45012) of the second evaporator (4501) is connected to a refrigerant inlet (4401) of the first evaporator (440), and a refrigerant outlet (4402) of the first evaporator (440) is connected to a refrigerant inlet (4101) of the compressor (410).

IPC Classes  ?

• F25B 5/04 - Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series

Abstract

The present application provides a circuit breaker and a power apparatus. The circuit breaker comprises a housing, an operating handle, an operating mechanism, a through-current assembly, an arc extinguishing chamber, and an arc extinction module. The operating handle, the operating mechanism, the through-current assembly, the arc extinguishing chamber, and the arc extinction module are sequentially arranged in the depth direction of the circuit breaker. The through-current assembly comprises a moving contact assembly and a static contact. The operating mechanism is connected to the moving contact assembly. The operating handle is used for controlling the operating mechanism to drive a gas production connecting rod of the moving contact assembly to rotate, so that a moving contact is in contact with or separated from the static contact. The arc extinguishing chamber is used for extinguishing an electric arc generated when the moving contact is separated from the static contact. The arc extinction module is used for purifying gas ejected from the arc extinguishing chamber. In the circuit breaker of the present application, the mechanisms are arranged in the depth direction of the circuit breaker, and the size in the height direction is relatively small, so that the number of circuit breakers that can be arranged in a cabinet is increased. When the moving contact is separated from the static contact, the gas production connecting rod is used for forming gas blowing, so that the electric arc passes through the arc extinguishing chamber in the depth direction to achieve arc extinguishing, so as to improve the safety of the circuit breaker.

IPC Classes  ?

• H01H 71/02 - HousingsCasingsBasesMountings
• H01H 73/18 - Means for extinguishing or suppressing arc
• H02B 1/04 - Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing

Abstract

The present application provides a charging connection device, an electric vehicle, and a charging pile. The charging connection device is applied to the electric vehicle. The charging connection device comprises a plurality of groups of charging loop switches and a plurality of groups of direct-current sockets, each group of charging loop switches comprises two switches, each group of direct-current sockets among the plurality of groups of direct-current sockets is used for being connected to a group of direct-current plugs of the charging pile, and each group of direct-current sockets comprises a positive direct-current socket and a negative direct-current socket. Each group of direct-current sockets is connected to a power battery of the electric vehicle by means of one group of charging loop switches, and different groups of direct-current sockets are connected to the power battery by means of different groups of charging loop switches; and each group of direct-current sockets is used for receiving currents outputted by different charging modules in the charging pile. According to embodiments of the present application, a charging power for charging the power battery can be increased, and a charging speed is increased.

IPC Classes  ?

• B60L 53/16 - Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
• B60L 53/31 - Charging columns specially adapted for electric vehicles
• B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries

Abstract

The present application provides a power conversion apparatus. The power conversion apparatus comprises a circuit board, a power unit and a radiator. The circuit board is provided with a through hole. In the axial direction of the through hole, the power unit is located on one side of the circuit board. In the axial direction of the through hole, the radiator is located on the side of the circuit board away from the power unit. The radiator is provided with a boss, and the boss is at least partially located in the through hole and is in contact with the power unit. Heat emitted during working of the power unit can be transmitted to the radiator simply by means of the boss, and is then diffused to the external environment by means of the radiator, such that the heat dissipation path for the power unit is shortened, thus greatly improving the heat dissipation efficiency of the power unit, and facilitating rapid heat dissipation of the power unit.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components

Abstract

Provided in the present application are a power assembly and an electric motor controller. The power assembly comprises a power module, a radiator and an insulating member, wherein the power module comprises a lead-out terminal, the insulating member is arranged on the surface of the radiator on the side facing the power module, and a projection of the insulating member in the thickness direction of the power assembly covers a projection of the lead-out terminal on the radiator. The projection of the insulating member in the thickness direction of the power assembly covers the projection of the lead-out terminal on the radiator, and safety-compliant electrical insulation between the lead-out terminal and the radiator is ensured by means of the insulating member, thereby improving the electrical insulation performance between the power module and the radiator.

IPC Classes  ?

• H01L 23/367 - Cooling facilitated by shape of device

Abstract

Provided in the embodiments of the present application are a driving electric motor having one end of a stator winding subjected to immersion cooling, a power assembly, and an electric vehicle. The driving electric motor comprises: a stator core, a stator winding and a cooling cover. The stator core is used for fixing the stator winding. Along the axial direction of the driving electric motor, one winding end of the stator winding is exposed out of one end of the stator core. Along the radial direction of the driving electric motor, the inner diameter of one winding end of the stator winding is larger than the inner diameter of the stator core. The cooling cover is used for accommodating a cooling liquid and one winding end. The cooling cover comprises a first annular wall, wherein along the radial direction of the driving electric motor, the outer diameter of the first annular wall is less than or equal to the inner diameter of one winding end of the stator winding. The first annular wall faces one end of the stator core along the axial direction of the driving electric motor and is used for enclosing said end of the stator core to form an accommodating structure. The cooling liquid accommodated in the accommodating structure is used for immersion cooling of one winding end of the stator winding. The embodiments of the present application can perform good heat dissipation on the stator winding.

IPC Classes  ?

• H02K 9/197 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
• H02K 3/50 - Fastening of winding heads, equalising connectors, or connections thereto
• B60K 11/02 - Arrangement in connection with cooling of propulsion units with liquid cooling

Abstract

An electromechanical braking system with wear compensation and a vehicle. The electromechanical braking system includes a caliper body, two friction plates, a gain bridge, a stud, and a drive apparatus, the gain bridge, one friction plate, the other friction plate, and the stud are arranged sequentially, the gain bridge is configured to movably connect the caliper body and the one friction plate, and the stud is configured to drivingly connect the caliper body and the other friction plate; the drive apparatus is configured to: drive the gain bridge and the one friction plate, and drive the stud and the other friction plate; and the drive apparatus is further configured to drive, through a unidirectional torque limiting apparatus, the stud to rotate relative to the caliper body along an axis of the stud. The embodiments improve reliability of the electromechanical braking system.

IPC Classes  ?

• F16D 65/56 - Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
• F16D 55/00 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
• F16D 55/226 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially
• F16D 65/00 - Parts or details of brakes
• F16D 65/095 - Pivots or supporting members therefor
• F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
• F16D 65/38 - Slack adjusters
• F16D 121/24 - Electric or magnetic using motors
• F16D 125/32 - CamsLevers with cams acting on one cam follower
• F16D 125/52 - Rotating members in mutual engagement with non-parallel stationary axes, e.g. worm or bevel gears

Abstract

A communication method and apparatus. The method is applied to a first node, a plurality of channels are disposed on the first node, different channels in the plurality of channels respectively carry information of different priorities, and the channel is a physical channel established by using a power line. The method includes: the first node generates a first packet including first information, and sends the first packet to a second node through a first channel, where the first channel is a channel that carries information of a first priority in the plurality of channels, the first priority is a priority of the first information, and the second node establishes a connection to the first node through a power line. Accordingly, information of different priorities may be sent through different channels.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H04L 47/6275 - Queue scheduling characterised by scheduling criteria for service slots or service orders based on priority

Abstract

A multi-input power supply circuit and an electronic device. A sampling circuit of the multi-input power supply circuit includes at least one resistor. The at least one resistor provides a voltage feedback signal for a control circuit of the multi-input power supply circuit based on input voltages of input interfaces of the multi-input power supply circuit, and provides a function of isolation between the control circuit and the input interfaces. The sampling circuit of the multi-input power supply circuit implements input voltage sampling and isolation. In addition, at least a beneficial effect of low complexity of a circuit structure is implemented.

IPC Classes  ?

• H02J 4/00 - Circuit arrangements for mains or distribution networks not specified as ac or dc
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

Provided in the present application are an electro-mechanical brake system with a longitudinally arranged electric motor shaft, and a vehicle. The electro-mechanical brake system comprises a braking electric motor, a speed reducer, a transmission mechanism, a caliper, and a caliper bracket, wherein the caliper is slidably connected to the caliper bracket by means of a guide rod and is used for driving friction pads to brake a brake disc; and an electric motor shaft of the braking electric motor is longitudinally arranged relative to the guide rod and drives the caliper to slide along the guide rod relative to the caliper bracket by means of the speed reducer and the transmission mechanism. In the electro-mechanical brake system of the present application, the electric motor shaft of the braking electric motor is longitudinally arranged to adapt to the wheel-side space of the vehicle, such that the arrangement of the vehicle is more compact, thereby facilitating miniaturization of the vehicle.

IPC Classes  ?

• B60T 13/74 - Transmitting braking action from initiating means to ultimate brake actuator with power assistance or driveBrake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
• B60T 1/06 - Arrangements of braking elements, i.e. of those parts where braking effect occurs acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission
• F16D 65/092 - Bands, shoes or padsPivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes

Abstract

Provided in the embodiments of the present application are an energy storage device, an energy storage system, and a liquid cooling control method for battery packs of the energy storage device. The energy storage device comprises a plurality of battery packs, an input main line, a plurality of input branches, an output main line and a plurality of output branches. Each of the plurality of battery packs comprises a liquid inlet and a liquid outlet; the plurality of input branches are communicated with the input main line; the plurality of output branches are communicated with the output main line. The plurality of input branches are communicated with the liquid inlets of the plurality of battery packs on a one-to-one basis, and the plurality of output branches are communicated with the liquid outlets of the plurality of battery packs on a one-to-one basis. The energy storage device further comprises series branches and control valves, one end of each series branch being communicated with the liquid outlet of one battery pack, and the other end of the series branch being communicated with the liquid inlet of another battery pack; each control valve is used for controlling switching between series connection and parallel connection of one battery pack and another battery pack. The energy storage device of the present application can effectively suppress thermal runaway of battery packs.

IPC Classes  ?

• H01M 10/6568 - Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings

Abstract

A backup apparatus includes a contactor, a first rectifier circuit, an auxiliary power supply circuit, a first switch, a second switch, and a controller. The contactor includes a coil connected to the auxiliary power supply circuit through the second switch and a main contact switch connected to a power grid. The first rectifier circuit is connected to the power grid through the first switch, and the first rectifier circuit is connected to the coil. When the first switch is turned on, the first rectifier circuit supplies power to the coil. After the main contact switch is turned on, the controller controls the second switch to be turned on and the first switch to be turned off. When the second switch is turned on and a voltage of the power grid is lower than a voltage threshold, an input capacitor in the auxiliary power supply circuit supplies power to the coil.

IPC Classes  ?

• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode

Abstract

A power supply system includes N distributed generations and at least one detection control unit. The N distributed generations are connected in parallel or in series and then connected to a power grid, and N is an integer greater than 1. The detection control unit is configured to: when detecting that oscillation of the power supply system exceeds a preset threshold range, obtain a power compensation control proportion of each distributed generation based on impedance from each distributed generation to a point of common coupling of the power supply system. The power compensation control proportion is a proportion of power output by each distributed generation to total power output by the power supply system. The detection control unit is further configured to control a power output proportion of each distributed generation based on the power compensation control proportion.

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

Provided in the present application is a photovoltaic energy storage system, comprising an inverter and an energy storage apparatus. The inverter comprises a direct-current conversion circuit, a direct-current bus, an inverter circuit and a switch assembly, wherein the switch assembly comprises a first end, a second end and a third end, the first end and the third end each being used for being connected between a negative electrode of a photovoltaic module and a negative electrode of the direct-current bus, and the second end being connected to a positive electrode of the direct-current bus; the switch assembly is used for controlling the disconnection between a negative input end of the direct-current conversion circuit and the positive electrode of the direct-current bus and the connection between the negative input end of the direct-current conversion circuit and the negative electrode of the direct-current bus; or the switch assembly is used for controlling the connection between the negative input end of the direct-current conversion circuit and the positive electrode of the direct-current bus and the disconnection between the negative input end of the direct-current conversion circuit and the negative electrode of the direct-current bus. The technical solution can reduce the complexity of the photovoltaic energy storage system and the number of devices, thereby further lowering costs.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means

Abstract

An on-board charger having a load power adaptation function, a control method, and an electric vehicle. The on-board charger (10) comprises a power conversion circuit (11) and a control circuit (13), wherein the power conversion circuit (11) is used for receiving a first direct current and converting the first direct current into a first alternating current, so as to supply power to a load (50); and in response to the current value of the first alternating current being greater than a preset current value, the control circuit (13) is used for controlling the power conversion circuit (11) to reduce the current value of the first alternating current, or in response to the output power of the power conversion circuit (11) being greater than a preset power value during the process of the power conversion circuit (11) outputting the first alternating current, the control circuit (13) is used for controlling the power conversion circuit (11) to reduce the current value of the first alternating current. During the process of the on-board charger (10) supplying power to the outside, the operation power of the load (50) can be reduced when the power of the load (50) is excessively high, and thus the load (50) capacity of the on-board charger (10) can be improved.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 7/10 - Regulation of the charging current or voltage using discharge tubes or semiconductor devices using semiconductor devices only
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
• B60L 53/22 - Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• B60L 1/00 - Supplying electric power to auxiliary equipment of electrically-propelled vehicles

Abstract

A liquid-cooled energy storage apparatus. The liquid-cooled energy storage apparatus comprises a box body, a plurality of battery packs, and a cluster-level liquid supply pipe extending in the height direction of the box body, the plurality of battery packs being located in the box body and being stacked in the height direction of the box body. The cluster-level liquid supply pipe is provided with a plurality of liquid supply branch pipes arranged at intervals in the height direction. Any one of the liquid supply branch pipes is used to place the cluster-level liquid supply pipe in communication with a liquid inlet of a liquid cooling plate of one battery pack among the plurality of battery packs. In the height direction, the position at which the liquid inlet of the liquid cooling plate is located is higher than the position at which a junction between the liquid supply branch pipe and the cluster-level liquid supply pipe is located. In the solution, due to the fact that the position at which the liquid inlet of the liquid cooling plate is located is higher in the height direction than the position at which the junction between the liquid supply branch pipe and the cluster-level liquid supply pipe is located, when cooling liquid in the liquid-cooled energy storage apparatus is replaced, the cooling liquid of the liquid cooling plate in the battery pack can be discharged from the liquid inlet of the liquid cooling plate into the cluster-level liquid supply pipe by using the gravity of the cooling liquid, so that the cooling liquid of the liquid cooling plate in the battery pack can be fully discharged and the liquid exchange ratio of the liquid-cooled energy storage apparatus is improved.

IPC Classes  ?

• H01M 10/613 - Cooling or keeping cold

Abstract

The present application provides a power conversion apparatus, comprising: N alternating current-direct current (AC-DC) conversion circuits, N input power supply lines and a detection apparatus, wherein the N AC-DC conversion circuits are connected in parallel, and the N input power supply lines are in one-to-one correspondence with N power conversion circuits. Each AC-DC conversion circuit is used for rectifying an alternating current outputted from a corresponding input power supply line and outputting a direct current. The detection apparatus comprises a first port and a second port, and the detection apparatus is used for: obtaining leakage currents of the N input power supply lines via the first port and obtaining the current or voltage of an ith input power supply line via the second port; and on the basis of the leakage currents of the N input power supply lines and the current or voltage of the ith input power supply line, determining a leakage current of the power conversion apparatus, wherein N is a positive integer, and N≥2, and 1≤i≤N. The solution can solve the problem of leakage current protection on an alternating-current input side.

IPC Classes  ?

• H02J 7/10 - Regulation of the charging current or voltage using discharge tubes or semiconductor devices using semiconductor devices only
• B60L 53/31 - Charging columns specially adapted for electric vehicles
• B60L 53/62 - Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
• B60L 53/66 - Data transfer between charging stations and vehicles
• H02H 3/32 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors

Abstract

Provided in the present application is a photovoltaic energy storage system, comprising: an inverter, an energy storage device and a voltage compensation assembly. The inverter comprises a direct-current conversion circuit, a direct-current bus, an inverter circuit and a first switch, wherein a positive input end of the direct-current conversion circuit is used for connecting to a positive electrode of a photovoltaic assembly, and a negative input end of the direct-current conversion circuit is used for connecting to a negative electrode of the photovoltaic assembly; and the first switch is disposed between a connection point of the voltage compensation assembly and the negative input end of the direct-current conversion circuit and a negative electrode of the direct-current bus, and is used for controlling connection and disconnection between the voltage compensation assembly and the negative electrode of the direct-current bus. The photovoltaic energy storage system further comprises a controller, which is used for, when an output voltage and/or an output current of the photovoltaic assembly is less than or equal to a threshold value, controlling the first switch to be disconnected and controlling the voltage compensation assembly to operate, so that the voltage of the negative electrode of the photovoltaic assembly relative to the ground is raised to a zero voltage or a positive voltage. According to the solution, PID compensation can be carried out on a photovoltaic assembly at night, so as to solve the PID problem of the photovoltaic assembly.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means

Abstract

A power module includes a first substrate, a second substrate, a chip, and a package body. The first substrate includes a first surface and a second surface, and the first surface is configured to mount the chip. The second substrate includes a bearing surface, the bearing surface is configured to bear the first substrate, and the bearing surface is in contact with the second surface. The bearing surface includes a first region and a second region, the first region is opposite to the first substrate, the second region is disposed in a ring shape around the first region, and a surface material of the second region includes copper, a copper alloy, or a copper oxide. The package body is configured to wrap the chip, the first substrate, and at least a part of the second substrate, and the package body is in contact with the second region.

IPC Classes  ?

• H01L 23/498 - Leads on insulating substrates
• H01L 21/48 - Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups or
• H01L 23/13 - Mountings, e.g. non-detachable insulating substrates characterised by the shape
• H01L 23/367 - Cooling facilitated by shape of device

Abstract

A energy storage system includes battery pack and a controller. The battery pack includes an electrochemical cell, a heating film, a first switching transistor, and a first drive circuit. The heating film and the first switching transistor are connected in series, and then connected in parallel between a positive direct current bus and a negative direct current bus. The first drive circuit is configured to output a pulse signal, to drive the first switching transistor to be turned on and turned off. The controller is configured to: if a voltage between the positive direct current bus and the negative direct current bus is greater than a voltage threshold, reduce a duty cycle of the pulse signal; or if a voltage between the positive direct current bus and the negative direct current bus is less than or equal to a voltage threshold, increase a duty cycle of the pulse signal.

IPC Classes  ?

• H01M 10/657 - Means for temperature control structurally associated with the cells by electric or electromagnetic means
• H01M 10/46 - Accumulators structurally combined with charging apparatus
• H01M 10/615 - Heating or keeping warm
• H01M 10/627 - Stationary installations, e.g. power plant buffering or backup power supplies
• H01M 10/63 - Control systems
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters

Abstract

A vehicle control unit, a motor control unit and a related device. The motor control unit sends a first signal to the vehicle control unit. The motor control unit is connected to the motor control unit or the vehicle control unit and sends a second signal. The vehicle control unit is configured to send a third signal to the motor control unit. Before receiving the second signal, the vehicle control unit generates the third signal by using the first signal, and sends the third signal to any one or more of at least one motor control unit, so that the motor control unit that receives the third signal adjusts torque, to perform stability control on a vehicle. In this way, a slip rate of the vehicle on a slippery road surface can be reduced.

IPC Classes  ?

• B60W 30/02 - Control of vehicle driving stability
• B60R 16/023 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric for transmission of signals between vehicle parts or subsystems

Abstract

A photovoltaic inverter includes a conversion circuit, a collection circuit, and a controller. The collection circuit is configured to obtain a positive direct current bus voltage and a negative direct current bus voltage of the conversion circuit. The controller is configured to generate an even-order harmonic voltage regulation signal based on the positive direct current bus voltage and the negative direct current bus voltage of the conversion circuit and a phase of an output voltage of the photovoltaic inverter, generate a drive control signal based on the even-order harmonic voltage regulation signal, and control a switching transistor in the conversion circuit to be turned on or off to control the conversion circuit to output a target voltage and reduce a difference between the positive direct current bus voltage and the negative direct current bus voltage of the conversion circuit.

IPC Classes  ?

• H02M 7/487 - Neutral point clamped inverters
• H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
• H02S 40/32 - Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules

Abstract

The present application provides a disc-type hybrid powertrain and an electric vehicle. The disc-type hybrid powertrain is configured to be driven by an engine of an electric vehicle to generate power and is used for driving wheels of the electric vehicle to rotate. The disc-type hybrid powertrain comprises a disc-type stator, two disc-type rotors, and two rotating shafts. The two disc-type rotors are respectively arranged on two sides of a stator iron core in the axial direction. A group of stator windings are arranged on the side of the disc-type stator facing one of the disc-type rotors, and the group of stator windings and said disc-type rotor are opposite in the axial direction to form a disc-type motor; and the other group of stator windings are arranged on the side of the disc-type stator facing the other disc-type rotor, and the other group of stator windings and the other disc-type rotor are opposite in the axial direction to form the other disc-type motor. One of the two rotating shafts is configured to be transmittingly connected to the engine and drive the corresponding disc-type rotor to rotate, so as to generate power. The other rotating shaft is used for rotating along with the other disc rotor and driving the wheels.

IPC Classes  ?

• H02K 7/20 - Structural association with auxiliary dynamo-electric machines, e.g. with electric starter motors or exciters

Abstract

Embodiments of the present application provide a power distribution apparatus, a charging device, an energy storage device, and a charging system. The power distribution apparatus comprises at least one power distribution unit, and each power distribution unit comprises at least one power supply port, a plurality of load ports, at least one connection port, and a switch matrix. Each power supply port is connected to a power module in the charging device, and each load port is connected to a load. The switch matrix is used for disconnecting or connecting any two of each power supply port, each load port, and each connection port. The at least one power distribution unit of the power distribution apparatus comprises a first power distribution unit, and one connection port of the first power distribution unit is connected to a power distribution unit of another charging device. According to the embodiments of the present application, the output power of the load ports of the power distribution apparatus can be flexibly adjusted to meet the charging demanded power of different loads.

IPC Classes  ?

• B60L 53/67 - Controlling two or more charging stations

Abstract

An electro-mechanical brake apparatus, a system, and a vehicle. The electro-mechanical brake apparatus includes a brake motor and the reducer. The brake motor includes a rotor and a stator. The reducer includes the transmission shaft and a planetary gear set. An axis of the transmission shaft is offset to an axis of the rotor along a radial direction of the brake motor, the rotor is configured to drive the transmission shaft to rotate around the axis of the rotor, the transmission shaft is configured to drive, through a planet gear of the planetary gear set, a sun gear of the planetary gear set to rotate, and the sun gear is configured to drive the friction plate through a feed mechanism. The electro-mechanical brake apparatus implements integral integration of the brake motor and the reducer which reduces an axial size of the electro-mechanical brake apparatus.

IPC Classes  ?

• F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
• F16D 121/24 - Electric or magnetic using motors
• F16D 125/40 - Screw-and-nut
• F16D 125/50 - Rotating members in mutual engagement with parallel non-stationary axes, e.g. planetary gearing

Abstract

A disc powertrain with dual-drive or single-drive dual-speed transmission and an electric vehicle. A disc powertrain with dual-drive dual-speed transmission includes a gearshift mechanism, two disc motors, and two planetary gear reducers. The gearshift mechanism is configured to: separate a transmission connection between a planet carrier of one planetary gear reducer and a half shaft of one wheel, separate a transmission connection between a sun gear of the one planetary gear reducer and a motor shaft of one disc motor, and restore a transmission connection between the motor shaft of the one disc motor and the half shaft of the one wheel. In the disc powertrain provided, the disc motor is able directly in transmission connection with the wheel without using the reducer, thereby reducing power loss in process of driving the wheel, and improving integration to facilitate miniaturization of the disc powertrain.

IPC Classes  ?

• B60K 17/04 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
• B60K 7/00 - Disposition of motor in, or adjacent to, traction wheel
• B60K 17/02 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
• F16H 3/46 - Gearings having only two central gears, connected by orbital gears
• F16H 61/28 - Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
• F16H 61/32 - Electric motors therefor

Abstract

A power device includes a housing and a heat dissipation apparatus, where a partition board is disposed in the housing, the partition board divides the housing into a first cavity and a second cavity, and the partition board is provided with a first opening and a second opening that communicate the first cavity with the second cavity. A to-be-heat-dissipated component is disposed in the first cavity. The second cavity is provided with an air inlet and an air outlet, and the air inlet and the air outlet are provided opposite to each other in a first direction. The heat dissipation apparatus includes a first fin disposed in the second cavity, where a channel is provided in the first fin, the channel runs through the first fin in a second direction, and two ends of the channel are respectively in communication with the first opening and the second opening.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H02S 40/32 - Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components

Abstract

A battery pack includes a plurality of battery subpacks and voltage detection circuits, a current detection circuit, and a BMS. Each battery subpack and one connection component connected to the battery subpack form one to-be-detected assembly. The current detection circuit is configured to detect a current of the charge/discharge loop. The voltage detection circuit is configured to detect voltages at two ends of the to-be-detected assembly. The BMS is configured to: obtain the current of the charge/discharge loop and voltages at two ends of each to-be-detected assembly based on a preset period, generate a current sequence and a first voltage sequence of each to-be-detected assembly, calculate an impedance of each to-be-detected assembly based on the current sequence and the first voltage sequence, and when the impedance is greater than or equal to an impedance threshold, determine that the connection component in the to-be-detected assembly is abnormally connected.

IPC Classes  ?

• H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
• G01R 27/16 - Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
• G01R 31/68 - Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
• H01M 10/44 - Methods for charging or discharging
• H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
• H01M 50/204 - Racks, modules or packs for multiple batteries or multiple cells
• H01M 50/51 - Connection only in series
• H01M 50/569 - Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals

Abstract

This application provides a motor, a powertrain, and a vehicle. The motor includes a stator core and a winding structure wound around the stator core, and further includes a first injection molding structure which includes a first injection molding part and a plurality of first busbars. The first electrical connector of each first busbar is correspondingly connected to a first lead-out end of each phase of the winding structure. The first injection molding part wraps the first main body part of the first busbar. An insulation cover is disposed on the first injection molding structure, the insulation cover covers the exposed first electrical connector and the exposed first lead-out end.

IPC Classes  ?

• H02K 3/50 - Fastening of winding heads, equalising connectors, or connections thereto
• H02K 11/25 - Devices for sensing temperature, or actuated thereby

Abstract

The present application provides an electric motor having an oil hole on each mounting surface, a power assembly and an electric vehicle. The electric motor comprises a motor housing and an end cover, the motor housing comprises a motor accommodating cavity and a housing mounting surface, the housing mounting surface comprises a housing oil outlet hole, and the housing oil outlet hole is adapted to be in communication with an internal oil channel of the motor housing. The end cover comprises an end cover mounting surface, the end cover mounting surface is used for fixing the housing mounting surface, the end cover mounting surface comprises an end cover oil inlet hole, and the end cover oil inlet hole is adapted to be in communication with the housing oil outlet hole and an internal oil channel of the end cover. In the radial direction of the electric motor, the housing mounting surface surrounds the periphery of the motor accommodating cavity. In the axial direction of the electric motor, the opening of the housing oil outlet hole faces the end cover, the opening of the end cover oil inlet hole faces the motor housing, and the projection of the housing oil outlet hole at least partially overlaps the projection of the end cover oil inlet hole. According to the present application, some cooling oil in the motor housing is distributed to the end cover by means of the housing oil outlet hole and the end cover oil inlet hole, thereby avoiding insufficient local cooling and lubrication, reducing the impact of the rotating speed of an oil pump on the cooling and lubricating effect, and improving the system reliability.

IPC Classes  ?

• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
• H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields

Abstract

The present application provides a charging device. The charging device comprises a plurality of first charging cabinets, a plurality of AC-DC conversion modules, a DC bus, and a plurality of groups of charging guns, wherein each of the plurality of first charging cabinets comprises a group of DC-DC conversion modules. An input end of each of the plurality of AC-DC conversion modules is configured to be connected to an output end of a corresponding transformer, and an output end of each AC-DC conversion module and an input end of each DC-DC conversion module in one group of DC-DC conversion modules are both connected to the DC bus. Output ends of one group of DC-DC conversion modules are connected to one group of charging guns among the plurality of groups of charging guns, and each group of the plurality of groups of charging guns are configured to be connected to vehicles to be charged. By means of the present application, the requirement of a higher power level can be satisfied, and the charging utilization rate of the charging device can also be increased.

IPC Classes  ?

• B60L 53/60 - Monitoring or controlling charging stations

Abstract

A power conversion device includes a DC/DC conversion circuit and a DC/AC conversion circuit, the DC/DC conversion circuit is configured to connect to an energy storage unit and the DC/AC conversion circuit, the DC/AC conversion circuit includes a positive bus, a negative bus, and a neutral line, the DC/AC conversion circuit is configured to connect to an grid. An input voltage of the DC/DC conversion circuit is a voltage between the positive bus and a positive end of the energy storage unit, or a voltage between a positive end of the energy storage unit and the neutral line, or a voltage between the neutral line and a negative end of the energy storage unit, or a voltage between a negative end of the energy storage unit and the negative bus. An output voltage of the DC/DC conversion circuit is half of a direct current bus voltage.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02J 3/28 - Arrangements for balancing the load in a network by storage of energy
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/36 - Means for starting or stopping converters

Abstract

A control apparatus used in a microgrid system, a control method, and a microgrid system. The control apparatus is configured to communicatively connect to M converters and a point of interconnection switch, where M≥1, and a microgrid bus is configured to connect to an external grid via the point of interconnection switch. The control apparatus is configured to: if a quantity of converters that switch to a voltage source mode at a third moment is greater than or equal to the first threshold, control the point of interconnection switch to be turned off, and control the M converters to operate in the voltage source mode; otherwise, control the M converters to operate in a current source mode.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks

Abstract

A charging pile includes a precharge circuit and at least one power conversion apparatus. An output end of the precharge circuit is connected to a bus capacitor in each power conversion apparatus. Each power conversion apparatus is configured to provide electric energy for a charging connector. When each power conversion apparatus is in an off state and maximum power-off duration is greater than first preset duration, the precharge circuit is configured to output a recovery voltage, so that each bus capacitor is powered on. Power-off duration is an interval between last power-off time and current power-on time of the bus capacitor. The maximum power-off duration is maximum duration in power-off duration of each bus capacitor. The recovery voltage is less than a rated voltage of any bus capacitor.

IPC Classes  ?

• H02J 7/04 - Regulation of the charging current or voltage
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

Embodiments of the invention relates to a three-phase bidirectional power converter (100) using a soft switching cell (120). The three-phase bidirectional power converter (100) comprises a switching network (110), a soft switching cell (120), an input (130), and a DC bus (140). The three-phase bidirectional power converter (100) is configured to: align the switches of the switching network (110) into a switching pattern, and to discharge a current from the soft switching cell (120) into the switching network (110) for zero voltage switching of the aligned switches of the switching network (110) according to the switching pattern. Furthermore, the invention also relates to a corresponding method.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 7/219 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
• H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
• H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

Vdd Vdd VpCCpCC VCC C , to be maximized. The grid-connected power converter controller is configured to maintain synchronism with the grid and support the grid, when the fault mode is activated.

IPC Classes  ?

• H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
• H02M 7/5395 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
• G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
• H02S 40/32 - Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules

Abstract

An energy storage container (100), comprising a battery cluster, a container body (110), and a smoke gas channel (130), wherein the container body (110) comprises a rear wall (112) and a container door, the rear wall (112) and the container door are arranged in parallel, the battery cluster and the smoke gas channel (130) are arranged in the container body (110), a plurality of battery clusters are arranged in parallel, the battery clusters are in one-to-one correspondence with the smoke gas channels (130), and the snoke channel (130) is located between the battery cluster and the rear wall (112). Each smoke gas channel (130) is provided with a plurality of smoke gas inlets (131) and a smoke gas outlet (132). Each battery pack (120) is provided with a boss (123) facing the smoke gas channel (130), the boss (123) passes through a corresponding smoke gas inlet (131), and a sealing member (136) is arranged between the outer wall of the boss (123) in contact with the peripheral edge of the smoke gas inlet (131) and the smoke gas inlet (131). Each boss (123) is of a hollow structure, the boss (123) is in communication with the interior of the corresponding battery pack (120), the surface of each boss (123) located in the smoke gas channel (130) is provided with an opening, and a pressure relief valve (122) is mounted in the opening. When thermal runaway occurs to a battery pack (120) and high-temperature smoke gas is released, the pressure relief valve (122) of the battery pack (120) is opened, the battery pack (120) is in communication with the corresponding smoke gas channel (130) by means of the boss (123) and the pressure relief valves(122), the high-temperature smoke gas is directionally released into the smoke gas channel (130) to prevent thermal runaway spreading to other battery packs (120) or battery clusters, and then the high-temperature smoke gas is discharged to the outside of the container body (110) by means of the smoke gas outlet (132), thereby achieving directional smoke gas discharge of the energy storage container (100).

IPC Classes  ?

• H01M 50/358 - External gas exhaust passages located on the battery cover or case

Abstract

Provided in the present application are an energy storage system and a photovoltaic system. The energy storage system comprises an energy storage unit and a power conversion system, a positive electrode end of the energy storage unit being used for connecting to a positive electrode end of the power conversion system by means of a first protection unit, and a negative electrode end of the energy storage unit being used for connecting to a negative electrode end of the power conversion system by means of a second protection unit. The second protection unit comprises a switch unit and a reverse polarity protection unit which are connected in parallel. The switch unit is closed during charging or discharging of the energy storage unit, so as to enable electrical connection between the energy storage unit and power conversion system. When the switch unit is off, the reverse polarity protection unit is used for unidirectionally conducting a current flowing from the negative electrode end of the power conversion system to the negative electrode end of the energy storage unit. When the power conversion system is short-circuited, the first protection unit is off, and, when the energy storage unit is short-circuited, the switch unit is off. The energy storage system provided by the present application can, when the power conversion system or the energy storage unit has had a short-circuit fault, isolate the short-circuit fault in a timely manner, thereby preventing fault propagation.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02H 7/122 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
• H02H 7/125 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for rectifiers
• H02H 7/18 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteriesEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for accumulators
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

Provided in the present application are a powertrain with a controllable oil circuit flow, a heat exchanger and an electric vehicle. The powertrain comprises a shell, a heat exchanger, an oil pump, a temperature control valve, a first oil circuit and a second oil circuit, wherein the shell comprises a speed reducer accommodating cavity, the speed reducer accommodating cavity being configured to accommodate a gear set of a speed reducer; an inlet of the oil pump is configured to be in communication with the speed reducer accommodating cavity; and the first oil circuit and the second oil circuit are connected in parallel between an outlet of the oil pump and the speed reducer accommodating cavity. The heat exchanger is configured to cool cooling oil in the first oil circuit. The temperature control valve is configured to control the flow ratio of the first oil circuit to the second oil circuit. By using the temperature control valve and the second oil circuit to shunt and parallel the first oil circuit where the heat exchanger is located, the present application facilitates rapid low-temperature lubrication, thereby reducing oil churning loss in the gear set of the speed reducer, and improving the efficiency of the powertrain.

IPC Classes  ?

• F16H 57/04 - Features relating to lubrication or cooling
• B60K 11/02 - Arrangement in connection with cooling of propulsion units with liquid cooling
• H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Abstract

The present application provides a motor rotor of an asynchronous motor in which both ends of guide bars are skewed in a same direction, an asynchronous motor, and an electric vehicle. The motor rotor comprises a rotor core and a rotor squirrel cage. The rotor squirrel cage comprises two end rings and a plurality of guide bars. The two end rings are fixed to both ends of the rotor core in the axial direction of the motor rotor. The plurality of guide bars are fixed to the interior of the rotor core. Each guide bar comprises a first section, a second section, and a third section. The first section, the second section, and the third section are sequentially connected in the axial direction of the motor rotor. The second section is parallel to the axial direction of the motor rotor, the first section and the third section intersect with the axial direction of the motor rotor, and the first section and the third section are skewed from the second section toward a same side in the circumferential direction of the motor rotor. By means of designing the first section and the third section of each guide bar into a V-shaped structure and designing the second section for transition, the amplitude of a radial electromagnetic force can be reduced, a torsional mode excited by an axially-uneven electromagnetic force can be eliminated, the manufacturing quality of the motor rotor can be improved, and the NVH performance of an entire vehicle can be improved.

IPC Classes  ?

• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
• H02K 1/22 - Rotating parts of the magnetic circuit

Abstract

Provided in the present application are a current-sharing circuit for switch devices, and a power conversion circuit. A collector of each switch device is connected to a collector interface, and an emitter thereof is connected to an emitter interface; a first end of a first resistor is connected to a gate interface, and a second end thereof is connected to a gate of a first switch device; a first end of a second resistor is connected to a second end of the first resistor and the emitter interface, and a second end thereof is connected to a Kelvin emitter interface; a first end of a third resistor is connected to the gate interface, and a second end thereof is connected to a gate of a second switch device; a first end of a fourth resistor is connected to the second end of the third resistor and the emitter interface, and a second end thereof is connected to the Kelvin emitter interface, wherein each resistor connected to a gate serves as a driving resistor for receiving a driving signal, and each resistor connected to the Kelvin emitter is used for suppressing an emitter circulating current and realizing current sharing. In this way, the magnitudes of two resistors can be separately designed with respect to a driving signal and a power signal, so as to better implement the current sharing of switch devices.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion

Abstract

A power converter includes a direct current conversion circuit, an inverter circuit, and a controller. An input of the direct current conversion circuit is configured to connect to the photovoltaic module, and an output of the direct current conversion circuit is connected to a bus capacitor of the inverter circuit. The controller is configured to change output power of the photovoltaic module. When power of the load is less than a specified threshold, the power converter is controlled to reduce the output power of the photovoltaic module from operating power to zero for at least once, where the operating power is greater than zero and less than rated output power, and when the output power of the photovoltaic module is the operating power, the power converter operates in a maximum power point tracking (MPPT) mode.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/12 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
• H02J 3/28 - Arrangements for balancing the load in a network by storage of energy
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 7/483 - Converters with outputs that each can have more than two voltage levels

Abstract

A power converter includes a DC-AC conversion circuit, a transformer, and a first AC-DC conversion circuit. The DC-AC conversion circuit is coupled to the first AC-DC conversion circuit through the transformer. A primary-side winding of the transformer includes at least two sub primary-side windings. The at least two sub primary-side windings include at least three primary-side winding connection ends. A quantity of turns of each sub primary-side winding is correspondingly adjusted based on a change of a corresponding input excitation voltage. The DC-AC conversion circuit is configured to generate at least two different excitation voltages in a time-division manner. One excitation voltage is correspondingly output to one sub primary-side winding. On a primary-side winding side of the transformer, excitation is correspondingly performed on windings having different quantities of turns in the primary-side winding in a matched manner based on different excitation voltages generated by the DC-AC conversion circuit.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 1/14 - Arrangements for reducing ripples from DC input or output
• H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A photovoltaic power generation system and a photovoltaic power generation system control method, to implement fast frequency support. The photovoltaic power generation system includes: a direct current converter, configured to connect an output of a photovoltaic module and perform voltage conversion on a direct current output by the photovoltaic module; an inverter, configured to convert a direct current output by the direct current converter into an alternating current and output the alternating current to a power grid; and a first controller, configured to generate a first drive signal based on two of a first voltage of the direct current of the direct current converter, an active power output by the inverter, and an operating parameter of the power grid, and control an operating state of the inverter based on the first drive signal.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks

Abstract

The present application provides an energy storage cabinet capable of directionally discharging flue gas, and an energy storage system. The energy storage cabinet comprises a box body; the box body is used for accommodating a plurality of stacked battery packs and a flue gas discharging pipe; the flue gas discharging pipe is arranged between a rear wall and the plurality of battery packs; the flue gas discharging pipe extends in a stacking direction of the plurality of battery packs; the flue gas discharging pipe is provided with a plurality of flue gas inlets, a flue gas outlet and a ventilation opening; the flue gas outlet and the ventilation opening are both communicated with an external environment of the energy storage cabinet; on the flue gas discharging pipe, the position of the flue gas outlet is higher than that of the ventilation opening; outer walls of at least some of the battery packs facing the flue gas discharging pipe are provided with pressure relief valves; first sealing members are arranged between the pressure relief valves and the flue gas inlets; an opening at one end of each first sealing member covers the periphery of the corresponding pressure relief valve, and an opening at the other end of the first sealing member covers the periphery of the corresponding flue gas inlet. High-temperature flue gas released when thermal runaway occurs in the battery packs is discharged to the flue gas discharging pipe through the flue gas inlets, and is further released to the external environment through the flue gas outlet, thereby achieving directional flue gas discharging of the energy storage cabinet.

IPC Classes  ?

• H01M 50/30 - Arrangements for facilitating escape of gases
• H01M 50/251 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders specially adapted for stationary devices, e.g. power plant buffering or backup power supplies

Abstract

A battery module (600), a battery pack (1), and an energy storage system. The battery module (600) comprises a first protection unit (610), a first battery cell and a second battery cell; the first protection unit (610) comprises a first breaking device (613), a first detection unit (612) and a first controller (611); the first battery cell and the second battery cell are connected in series. The first breaking device (613) is connected in series between the first battery cell and the second battery cell. The first detection unit (612) is used for detecting first state information, the first state information being used for indicating the state of the battery module (600). When the first state information indicates that the battery module (600) is abnormal, the first controller (611) is used for controlling the first breaking device (613) to be cut off.

IPC Classes  ?

• H01M 50/258 - Modular batteriesCasings provided with means for assembling
• H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
• H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
• H01M 50/583 - Devices or arrangements for the interruption of current in response to current, e.g. fuses
• H01M 50/581 - Devices or arrangements for the interruption of current in response to temperature

Abstract

Provided in the present application are a battery pack having a cut-off protection function, and an energy storage system. The battery pack comprises: a battery module, which is composed of a plurality of single cells; a breaking device, which is connected in series to the battery module; and a current sensor and a controller, wherein a first end of the current sensor is connected to a positive output end of the battery pack, and a second end of the current sensor is connected to a negative output end of the battery pack, such that the current difference between the positive output end and negative output end of the battery pack is measured; and the controller is used for controlling the breaking device to disconnect when the current difference measured by the current sensor is greater than a first threshold value, such that when a cell in the battery pack has a ground short-circuit fault, the fault can be quickly cut off, thereby ensuring the safe operation of the whole energy storage system.

IPC Classes  ?

• H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells

Abstract

An axial motor rotor includes a rotor backplane, a plurality of magnetic pole units, and a fastening member. The rotor backplane has a backplane fastening hole that is configured to be sleeved on a motor shaft of the axial motor. The magnetic pole units are located on a side that is of the rotor backplane and that is in an axial direction of the rotor backplane. A magnetic pole fastening hole is provided on a part of the magnetic pole units. The fastening member penetrates through the magnetic pole fastening hole and the backplane fastening hole to fasten the rotor backplane, the magnetic pole unit, and the fastening member.

IPC Classes  ?

• H02K 1/2795 - Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
• H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines

Abstract

An energy storage system includes a direct current bus, an energy storage module, an alternating current mains module, an energy storage converter module, a power conversion module, and a battery management system including a container monitoring unit. The power conversion module is configured to convert an alternating current voltage output by the alternating current mains module or an alternating current voltage output by the energy storage converter module into a first direct current voltage. The power conversion module uses, as a second direct current voltage, a maximum voltage among a direct current voltage output by the energy storage module, a bus voltage output by the direct current bus, and the first direct current voltage. The power conversion module then converts the second direct current voltage into a third direct current voltage and a fourth direct current voltage, and separately supply power to the container monitoring unit based on the third direct current voltage and the fourth direct current voltage.

IPC Classes  ?

• H01M 10/44 - Methods for charging or discharging
• G01R 31/382 - Arrangements for monitoring battery or accumulator variables, e.g. SoC
• G01R 31/392 - Determining battery ageing or deterioration, e.g. state of health
• G01R 31/396 - Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
• H02M 1/00 - Details of apparatus for conversion

Abstract

A three-state switching cell based frequency multiplying string PV power converter apparatus. The power converter apparatus includes a plurality of cascaded three-state switching cells arranged in two or more power units configured to receive power from two or more variable DC power sources, such as string photovoltaic power sources, and produce a multilevel terminal voltage. The apparatus generates a reduced amplitude ripple and multiplies the effective switching frequency in the reactive components by multiples of two, four, or more times the fundamental switching frequency of the three-state switching cells. Frequency multiplication and multilevel voltage generation is aided by cascading two three-state switching cells sharing a single transformer. The reduced voltage and current ripple amplitude and increased effective frequency allow reduced component size resulting in an efficient power converter apparatus with high power density

IPC Classes  ?

• H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/12 - Arrangements for reducing harmonics from AC input or output
• H02M 7/493 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel

Abstract

An energy storage system having a common-mode arc detection function, and an optical storage device. The energy storage system comprises a battery cluster (112), a common-mode current detection unit (1422) and a controller (141), wherein the controller (141) is used for controlling, when a frequency domain component of a common-mode current detected by the common-mode current detection unit (1422) is greater than a first preset amplitude, the disconnection of the path between the battery cluster (112) and an output end of the energy storage system. Thus, the accuracy and effectiveness of arc phenomenon detection can be improved, detection errors are lowered, and the use safety of the energy storage system is improved.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
• H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
• H01M 10/46 - Accumulators structurally combined with charging apparatus

Abstract

A component-level power electronics device is able to switch between a shutdown mode, a normal working mode, and a safe working mode, which includes: when the component-level power electronics device fails to receive the periodic communication signal, maintaining or switching to the shutdown mode; when the periodic communication signal received by the component-level power electronics device includes a heartbeat frame and does not include a voltage adjustment instruction, switching to the normal working mode; or when the periodic communication signal received by the component-level electric power electronics device includes the heartbeat frame and also includes the voltage adjustment instruction, switching to the safe working mode. The three working modes can ensure safety of both a device and a person, have a fast response speed, and are easy to implement.

IPC Classes  ?

• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02J 3/12 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 1/32 - Means for protecting converters other than by automatic disconnection

Abstract

A thermal management system includes a first path, a second path, a third path, a fourth path, and a multi-way valve. A first port and a second port of the multi-way valve are respectively communicated with an inlet and an outlet of the first path. A third port and a fourth port are respectively communicated with an inlet and an outlet of the second path. A fifth port and a sixth port are respectively communicated with an inlet and an outlet of the third path, the third path includes a second liquid outlet and a second liquid inlet, and the second liquid outlet and the second liquid inlet are separately configured to connect to a second cold plate. A seventh port and an eighth port are respectively communicated with an inlet and an outlet of the fourth path, and the fourth path includes a heat exchanger.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A powertrain with dual-line oil cooling and lubrication includes a housing, an oil pump, a motor, a reducer, and two oil lines. The two oil lines are configured to convey oil to the motor receptacle and the reducer receptacle respectively. One oil line is configured to couple to at least one of an outlet of the oil pump, a fine filter, a heat exchanger, or the motor receptacle, where the fine filter is configured to filter out impurities of oil flowing through the oil line, and where the heat exchanger is configured to cool the oil flowing through the oil line. The other oil line is configured to directly couple to a second outlet of the oil pump and to the reducer receptacle.

IPC Classes  ?

• H02K 9/193 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling mediumArrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with means for preventing leakage of the cooling medium
• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
• H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Abstract

The present disclosure provides a direct current power converter comprising a controller, a first power conversion module, and a second power conversion module. A first direct current terminal and a second direct current terminal of the first power conversion module are respectively coupled to a first direct current terminal and a second direct current terminal of the second power conversion module. A third direct current terminal of the first power conversion module is a third direct current terminal of the direct current power converter, a fourth direct current terminal of the first power conversion module is coupled to a third direct current terminal of the second power conversion module, and the first power conversion module includes at least one first full-bridge circuit. The controller is configured to control, based on a first total voltage, the first full-bridge circuit to work in a full-bridge mode or a half-bridge mode.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 1/00 - Details of apparatus for conversion

Abstract

A stator, a flat wire motor, a powertrain. A plurality of stator slots are evenly provided on an inner wall of the stator core in a circumferential direction, the stator winding includes flat wire conductors inserted in the stator slots. The flat wire conductors are connected to form m phase windings, each phase winding includes a plurality of phase units that are evenly disposed at spacings in the circumferential direction of the stator core, any phase unit of each phase winding includes at least two phase bands, each phase band of any phase unit includes two adjacent layers of flat wire conductors, and adjacent phase bands of any phase unit are staggered by one stator slot. The stator winding is a short-pitch winding, which reduces back electromotive force harmonics and improves performance of the motor.

IPC Classes  ?

• H02K 3/28 - Layout of windings or of connections between windings

Abstract

A dual-way oil-cooled and lubricated powertrain and an electric vehicle. The powertrain (10) comprises a housing, an oil pump (500), a motor (300), a speed reducer (200) and two oil ways (170, 180). The housing comprises a motor accommodating chamber (160) and a speed reducer accommodating chamber (150), the motor accommodating chamber (160) being used for accommodating a stator and a rotor of the motor (300), and the speed reducer accommodating chamber (150) being used for accommodating a gear set of the speed reducer (200). The two oil ways (170, 180) are used for respectively conveying oil to the motor accommodating chamber (160) and the speed reducer accommodating chamber (150). The oil way (180) is used for connecting an outlet of the oil pump (500), at least one of a fine filter (900) and a heat exchanger (400), and the motor accommodating chamber (160). The fine filter (900) is used for filtering out impurities of oil flowing through the oil way (180), and the heat exchanger (400) is used for cooling the oil flowing through the oil way (180). The other oil way (170) is used for directly connecting the outlet of the oil pump (500) and the speed reducer accommodating chamber (150). The high-cleanliness cold oil obtained by means of the oil way (180) cools and lubricates the motor (300) having a fine structure, and crude hot oil of the other oil way (170) directly lubricates the gear set of the speed reducer (200), such that the cooling and lubricating efficiency of the two oil ways (170, 180) are effectively improved.

IPC Classes  ?

• F16H 57/04 - Features relating to lubrication or cooling
• F16H 57/02 - GearboxesMounting gearing therein

Abstract

Provided in the present application are a heat exchanger and an energy storage apparatus. The heat exchanger comprises a refrigerant substrate, a plurality of condensing plate heat exchangers and a plurality of evaporating plate heat exchangers. In a first direction, the condensing plate heat exchangers and the evaporating plate heat exchangers are arranged on the same side of the refrigerant substrate. The side surface of each condensing plate heat exchanger facing the refrigerant substrate comprises a refrigerant inlet and a refrigerant outlet, and the side surface of each evaporating plate heat exchanger facing the refrigerant substrate comprises a refrigerant inlet and a refrigerant outlet. The refrigerant substrate comprises two condensing refrigerant flow paths and two evaporating refrigerant flow paths; one condensing refrigerant flow path in the two condensing refrigerant flow paths is used for connecting the refrigerant inlet of each condensing plate heat exchanger, and the other condensing refrigerant flow path is used for connecting the refrigerant outlet of each condensing plate heat exchanger; one evaporating refrigerant flow path in the two evaporating refrigerant flow paths is used for connecting the other condensing refrigerant flow path and the refrigerant inlet of each evaporating plate heat exchanger, and the other evaporating refrigerant flow path is used for connecting the refrigerant outlet of each evaporating plate heat exchanger. The present application can improve the cooling capacity of heat exchangers.

IPC Classes  ?

• B60H 1/00 - Heating, cooling or ventilating devices
• H01M 10/613 - Cooling or keeping cold

Abstract

A thermal management system (100), comprising a coolant circulation system, a refrigerant circulation system, and a heat exchange assembly. The refrigerant circulation system comprises a refrigerant flow channel plate (140), wherein a refrigerant flow channel for being communicated with the heat exchange assembly is integrated in the refrigerant flow channel plate (140). The coolant circulation system comprises a first coolant flow channel plate and a second coolant flow channel plate, wherein a coolant flow channel for being communicated with the heat exchange assembly is integrated in each coolant flow channel plate, and the coolant flow channel in the first coolant flow channel plate and the coolant flow channel in the second coolant flow channel plate are communicated with each other. The second coolant flow channel plate, the first coolant flow channel plate, and the refrigerant flow channel plate (140) are sequentially stacked. By stacking the refrigerant flow channel plate (140) and the two coolant flow channel plates, the difficulty of installation and maintenance can be reduced. Additionally, the coolant flow channels are used for being communicated with components in the coolant circulation system, and by distributing the coolant flow channels on the two stacked coolant flow channel plates, the footprint of the coolant flow channel plates can be reduced, and the difficulty of layout of the coolant flow channels can be reduced.

IPC Classes  ?

• H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
• H01M 10/613 - Cooling or keeping cold

Abstract

A powertrain having an open-circuit fault tolerance function. The powertrain comprises an electric motor controller (50) and a driving electric motor (60), wherein the driving electric motor is an interior permanent magnet synchronous electric motor, and the electric motor controller (50) comprises an inverter circuit (52) and a control apparatus (51). The control apparatus (51) is used for controlling, in response to any phase current of a driving current outputted by bridge arm midpoints of three-phase bridge arms becoming zero during the process of receiving a torque signal, bridge arm midpoints of two-phase bridge arms corresponding to the other two phase currents to respectively output a fault-tolerant current, wherein the fault-tolerant current is a pulsed alternating current, a current amplitude of the fault-tolerant current changes along with a change in a rotor angle of the driving electric motor (60), and the fault-tolerant current is used for controlling the average value of torques outputted by the driving electric motor (60) to be less than a torque indicated by the torque signal. A control method for a powertrain, which method is used for the powertrain. An electric vehicle, which comprises a vehicle control unit and the powertrain. By means of such configurations, when an open-circuit fault occurs, output torque pulsations of a driving electric motor can be reduced, and stable operation at a reduced power can be realized, thereby improving the availability of a driving system.

IPC Classes  ?

• B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed

Abstract

The present application provides a powertrain with a wire outgoing from a speed reducer, a dual-motor powertrain and an electric vehicle. The powertrain comprises a middle integrated shell, a resolver sensor, a motor and a speed reducer, wherein one middle integrated shell comprises a partition plate and two circumferential shells. One circumferential shell is used for fixing a motor stator of one motor and accommodating a motor rotor of one motor, and comprises at least one through hole, and the other circumferential shell is used for accommodating a gear set of one speed reducer; one partition plate is used for separating inner cavities of the two circumferential shells; one partition plate comprises a shaft hole and at least one wire outgoing hole; one shaft hole and the at least one wire outgoing hole are communicated with the inner cavities of the two circumferential shells; one shaft hole and an input shaft of one speed reducer or a motor shaft of one motor are coaxially arranged; and the distance between the at least one wire outgoing hole and a center point of the shaft hole is greater than an inner diameter of a resolver stator of one resolver sensor. The powertrain provided in the present application has a small axial size.

IPC Classes  ?

• H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Abstract

A energy storage system includes a first auxiliary power supply, a battery pack, and a current-limiting protection circuit. The first auxiliary power supply is configured to supply power to a second auxiliary power supply in the battery pack, the second auxiliary power supply is configured to supply power to a power board in the battery pack, and the second auxiliary power supply and the current-limiting protection circuit are connected in series and then connected in parallel to two ends of the first auxiliary power supply. The current-limiting protection circuit includes a drive circuit, a first switching transistor, and a first resistor, one end of the first switching transistor and the first resistor that are connected in series is connected to the first auxiliary power supply, the other end of the first switching transistor and the first resistor that are connected in series is connected to the second auxiliary power supply.

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 7/35 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells

Abstract

A wearable wireless power receiver arrangement comprising such wearable wireless power receiver, a wearable coupled resonator array comprising such wearable wireless power receiver, a ceiling-mountable power transmitter and a method for powering a wearable electronic device are provided which, in particular relate to wireless power delivery in dynamic environments. A wearable wireless power receiver that may be configured for location at the head of a person; comprises: a carrier substrate; an electrically conductive material mounted at the carrier substrate, the electrically conductive material forming at least one receiver coil, wherein the carrier substrate with the mounted electrically conductive material is formed to adapt to a head area of the person, wherein the at least one receiver coil is configured to receive an electromagnetic field.

IPC Classes  ?

• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/70 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

A power conversion device includes a terminal board, an electric energy conversion circuit, and a controller. A first terminal and a first temperature sampling circuit are disposed on the terminal board. The first terminal is connected to a direct current power supply or the electric energy conversion circuit by using a protection switch. The first temperature sampling circuit is configured to collect a temperature parameter of the first terminal. The controller obtains the temperature parameter collected by the first temperature sampling circuit. When the temperature parameter of the first terminal is greater than a temperature parameter threshold, the controller controls the protection switch to turn the protection switch off.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

Provided in the present application are a motor rotor balanced utilizing rotor laminations, a motor and a powertrain. The motor rotor comprises rotor cores and a motor shaft. The rotor cores comprise two first rotor cores and a plurality of second rotor cores, the plurality of second rotor cores being successively arranged between the two first rotor cores in the motor axial direction. Each first rotor core and each second rotor core all comprise a plurality of rotor laminations, each rotor lamination comprising a shaft hole, and an inner circumferential surface of each shaft hole comprising at least one protrusion. In the motor axial direction, the motor shaft penetrates through the shaft hole of each rotor lamination, an outer peripheral surface of the motor shaft comprising at least one keyway, and each protrusion being used for being embedded into one keyway of the motor shaft. Each rotor lamination in each first rotor core comprises at least one balancing through hole. Machining the balancing through holes in the rotor laminations in the first rotor cores not only reduces the amount of unbalance of the motor rotor, but also improves the material removal efficiency for dynamic balance of the motor rotor.

IPC Classes  ?

• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• H02K 1/27 - Rotor cores with permanent magnets

Abstract

Provided in the present application are a heat exchanger and an energy storage apparatus. The heat exchanger comprises at least one condensation plate heat exchanger, a plurality of evaporation plate heat exchangers and a refrigerant substrate, wherein each evaporation plate heat exchanger and each condensation plate heat exchanger are arranged on the same side of the refrigerant substrate in a first direction; the side face of each condensation plate heat exchanger facing the refrigerant substrate comprises a condensation refrigerant outlet, and the side face of each evaporation plate heat exchanger facing the refrigerant substrate comprises an evaporation refrigerant inlet; and the refrigerant substrate comprises a converging flow channel and at least one diverging structure, and each diverging structure comprises a plurality of diverging flow channels, one end of the converging flow channel being configured to be in communication with the condensation refrigerant outlet of each condensation plate heat exchanger, the other end of the converging flow channel being configured to be in communication with one end of each diverging flow channel, and the other end of each diverging flow channel being configured to be in communication with the evaporation refrigerant inlet of one evaporation plate heat exchanger. In the heat exchanger provided in the embodiments of the present application, the diverging structure is arranged on the refrigerant substrate, thereby reducing the space occupied by the heat exchanger, and simplifying the assembly of the heat exchanger.

IPC Classes  ?

• B60H 1/00 - Heating, cooling or ventilating devices
• H01M 10/613 - Cooling or keeping cold

Abstract

Provided in the present application are a heat dissipation system and an energy storage system. The heat dissipation system comprises a case and a thermal management module, the thermal management module being arranged in the case. A partition plate in the case divides the case into a temperature control chamber and a control chamber. The temperature control chamber is located above the control chamber. The thermal management module comprises at least two compressors, at least two water pumps, a plate heat exchange assembly and an electric control box, which are located in the control chamber. The compressors and the electric control box are sequentially arranged in the direction of width, the plate heat exchange assembly and the water pumps are sequentially arranged in the direction of width, and the electric control box and the water pumps are sequentially arranged in the direction of length. The compressors and the water pumps are connected to the plate heat exchange assembly, and the compressors and the water pumps are connected to the electric control box. The thermal management module further comprises a liquid cooling unit located in the temperature control chamber, the plate heat exchange assembly and the electric control box being connected to the liquid cooling unit. The heat dissipation system of the present application can realize hydraulic-electrical isolation and multiple thermal management systems, such that thermal management can still be performed in a scenario where a single thermal management system fails, thus improving the reliability of the energy storage system.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

An energy storage apparatus (1) having an explosion venting function, an explosion venting structure (20), and an energy storage system (1000). The energy storage apparatus (1) comprises a housing (10), an explosion venting plate (30), and a battery module (60). The energy storage apparatus (1) further comprises a stud (46) and a screw (42) used to fasten the explosion venting plate (30) to the housing (10). One end of the stud (46) is sealed and fixedly connected to an inner surface (31) of the explosion venting plate (30) facing an accommodating cavity (101), the stud (46) protrudes toward the accommodating cavity (101), an end surface of the other end of an extending direction of the stud (46) is provided with a through hole (461), an overlapping region of the housing (10) and the explosion venting plate (30) is provided with a holding hole (103), and the screw (42) located in the accommodating cavity (101) passes through the holding hole (103) along an extending direction of the screw (42) and is embedded into the through hole (461). The screw (42) and the stud (46) of the energy storage apparatus (1) are built in, and one end of the stud (46) is sealed and fixedly connected to the inner surface (31) of the explosion venting plate (30) facing the accommodating cavity (101), so that the explosion venting plate (30) can be prevented from leaking water or leaking air at the position connected to the stud (46), so as to improve the sealing performance. In addition, an explosion venting channel does not need to be considered, and multi-directional explosion venting can be implemented.

IPC Classes  ?

• H05K 5/02 - Casings, cabinets or drawers for electric apparatus Details
• H05K 5/03 - Covers
• H05K 5/06 - Hermetically-sealed casings
• H01M 50/20 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders
• H02J 15/00 - Systems for storing electric energy

Abstract

The present application provides a power converter, comprising: a power conversion circuit and a control circuit. The power conversion circuit comprises an inverter circuit, a direct-current bus capacitor, and a detection circuit, wherein the direct-current bus capacitor is connected in parallel to the inverter circuit. The direct-current bus capacitor comprises a positive bus capacitor and a negative bus capacitor which are connected in series. The inverter circuit comprises bridge arms. The detection circuit is used for measuring the voltage on the two sides of the positive bus capacitor, the voltage on the two sides of the negative bus capacitor, and an output current of each bridge arm. The control circuit is used for, in response to a preset condition, controlling the bridge arm to be switched from outputting two types of levels to outputting three types of levels in one switching period. The preset condition is a condition based on the voltage of the positive bus capacitor, the voltage of the negative bus capacitor, and the output current of the bridge arm. According to the present application, the three-level and two-level hybrid modulation is used, so that the power converter can achieve balance on the output quality of electric energy and power consumption, improving the performance of the power converter.

IPC Classes  ?

• H02M 7/483 - Converters with outputs that each can have more than two voltage levels
• H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
• H02M 1/00 - Details of apparatus for conversion
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks

Abstract

A power converter and a three-phase four-leg inverter circuit modulation method. The power converter comprises a three-phase four-leg inverter circuit and a controller. The controller is used for: when the absolute value of the instantaneous value of a modulation signal for an N-leg is greater than a first effective modulus value, injecting the modulation signal into the N-leg in a unipolar manner, or when the absolute value of the instantaneous value of the modulation signal for the N-leg is less than a second effective modulus value, injecting the modulation signal into the N-leg in a bipolar manner. The present application can prevent the modulation signal for the N-leg from being lost, reducing the switching loss of main legs, and improving the quality of electric energy output by the power converter.

IPC Classes  ?

• H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

An energy storage device (1) with an explosion venting function and an energy storage system (1000), the energy storage device (1) comprising a housing (20), an explosion venting plate (31), an insertion member (32), and a transmission assembly (33), wherein the housing (20) is provided with an insertion hole (102); the insertion member (32) is inserted into the insertion hole (102) thus fixing the explosion venting plate (31) to the housing (20); one end of the transmission assembly (33) is connected to the explosion venting plate (31), and the other end of the transmission assembly (33) is connected to the insertion member (32); and in the direction of insertion of the insertion member (32), the joint of the other end of the transmission assembly (33) and the insertion member (32) is located between the insertion hole (102) and the joint of one end of the transmission assembly (33) and the explosion venting plate (31). While overcoming defects such as assembly errors, part machining errors, and metal fatigue vibration, the energy storage device (1) has the advantages of easy machining and assembly, and reliability. On the basis of an explosion venting pressure, the deformation of the explosion venting plate (31) is calculated, and on the basis of the calculated amount of the deformation of the explosion venting plate (31), the length to which the insertion member (32) is inserted into the insertion hole (102) is then calculated. The explosion venting actuation pressure can be controlled simply by changing the length to which the insertion member (32) is inserted into the insertion hole (102), thereby adapting to scenarios with different explosion venting pressures.

IPC Classes  ?

• H01M 50/317 - Re-sealable arrangements
• H02J 15/00 - Systems for storing electric energy
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

Provided in the present application are an electro-mechanical brake device having an embedded lead screw, an electro-mechanical brake system and a vehicle. The electro-mechanical brake device comprises a housing, a brake motor, a speed reducer and a lead screw, wherein the brake motor is configured to drive the lead screw by means of the speed reducer to drive a friction plate; the housing is configured to accommodate a stator and a rotor of the brake motor, a planetary gearset of the speed reducer, and the lead screw; the stator and the planetary gearset are arranged in an axial direction of the brake motor, and the planetary gearset is configured to be drivingly connected to the rotor and the lead screw; the stator, the rotor and the lead screw are coaxially arranged; and the lead screw is at least partially embedded in a central hole of the stator or the rotor. In the electro-mechanical brake device of the present application, the lead screw is at least partially embedded in the central hole of the stator or the rotor, thus reducing the axial size of the electron-mechanical brake device, and achieving miniaturization.

IPC Classes  ?

• B60T 13/74 - Transmitting braking action from initiating means to ultimate brake actuator with power assistance or driveBrake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
• F16D 55/226 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially

Abstract

Disclosed are an electric motor and a power assembly device. The electric motor comprises a casing, a stator mechanism and a rotor mechanism, wherein the stator mechanism is fixedly arranged in the casing, the rotor mechanism is rotatably arranged in the stator mechanism, and the casing is provided with a liquid supply flow channel. A first liquid outlet and a second liquid outlet are respectively provided at two ends of the stator mechanism; and the stator mechanism comprises a first flow channel, two ends of the first flow channel being in communication with the first liquid outlet and a second liquid outlet, respectively. The stator mechanism comprises a lamination, the lamination comprising a first through slot and a second through slot. The first through slot is in communication with the second through slot to form a second flow channel through which the first flow channel is in communication with the liquid supply flow channel. The first flow channel and the second flow channel form a cooling flow channel in the stator mechanism, a cooling liquid is input into the cooling flow channel in the stator mechanism through the liquid supply flow channel of the casing, the cooling liquid fully exchanges heat with the stator mechanism, and the cooling liquid is then sprayed out through the liquid outlets in two end surfaces of the stator mechanism, to enable a coil winding of the stator mechanism to be cooled, such that the cooling capacity of the electric motor can be improved.

IPC Classes  ?

• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
• H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
• H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Abstract

The present application provides an electromechanical brake apparatus provided with an embedded speed reducer and a vehicle. The electromechanical brake apparatus comprises a housing, a brake motor, a coaxial speed reducer, and a brake caliper; the brake motor is used for driving, by means of the coaxial speed reducer, the brake caliper to drive a friction plate; the housing is used for accommodating a stator and a rotor of the brake motor and a planetary gear set of the coaxial speed reducer; the rotor is used for being in transmission connection with the planetary gear set; the stator, the rotor, and an output shaft are coaxially arranged; and the planetary gear set is at least partially embedded in a center hole of the stator or the rotor. According to the electromechanical brake apparatus of the present application, by at least partially embedding the planetary gear set in the center hole of the stator or the rotor, the axial dimension of the electromechanical brake apparatus is reduced, and miniaturization is achieved.

IPC Classes  ?

• F16D 55/226 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially
• F16D 65/16 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake
• F16D 71/00 - Mechanisms for bringing members to rest in a predetermined position
• B60T 13/74 - Transmitting braking action from initiating means to ultimate brake actuator with power assistance or driveBrake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive

Abstract

A power module includes a heat dissipation panel, a substrate, and a chip that are sequentially stacked. A first region and a second region are disposed on a surface of the heat dissipation panel, the second region is disposed at least at a corner of the first region, and surface roughness of the second region is greater than surface roughness of the first region. A projection of the substrate in a thickness direction of the heat dissipation panel overlaps the first region. A third region is disposed on a surface that is of the substrate and that is away from the heat dissipation panel, and a projection of the chip in the thickness direction of the heat dissipation panel overlaps the third region. The substrate and the chip are packaged using a molding compound, and the second region is in contact with the molding compound.

IPC Classes  ?

• H01L 23/367 - Cooling facilitated by shape of device
• H01L 21/48 - Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups or
• H01L 25/065 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group

Abstract

A motor controller, a powertrain, and an electric vehicle. The motor controller is configured to output a drive current or a heating current to an asynchronous motor. A waveform of each phase current of the drive current is a sine wave, and the drive current is used to control the asynchronous motor to output torque. A waveform of each phase current of the heating current is a square wave or a step wave, and the heating current is used to control the torque output by the asynchronous motor to be zero, and heat a winding of the asynchronous motor. Heat generated by the heating current on the winding of the asynchronous motor heats a power battery via a heat conduction apparatus. The motor controller adjusts a waveform of the heating current to increase heating power.

IPC Classes  ?

• H02P 21/22 - Current control, e.g. using a current control loop
• B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
• H01M 10/615 - Heating or keeping warm
• H01M 10/625 - Vehicles
• H01M 10/637 - Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devicesControl systems characterised by control of the internal current flowing through the cells, e.g. by switching

Abstract

A two-way oil-collecting reducer and an electric vehicle. The reducer includes an input gear, an intermediate gear set, an output gear, and an oil sump, and the oil sump includes a radial sump opening and a circumferential sump opening. An orientation of the radial sump opening is away from the intermediate gear set along a radial direction of the intermediate gear set. An orientation of the circumferential sump opening faces the output gear along a circumferential direction of the intermediate gear set. The radial sump opening and the circumferential sump opening are formed at the oil sump, so that the oil sump can collect lubricating oil churned by a gear train when the input gear drives, via the intermediate gear set, the output gear to rotate forward or reversely, to increase an amount of lubricating oil collected by the oil sump.

IPC Classes  ?

• F16H 57/04 - Features relating to lubrication or cooling
• F16H 57/02 - GearboxesMounting gearing therein

Abstract

A four-way valve, a temperature control system, and an energy storage system. The four-way valve includes a valve body and a valve plug. The valve body includes a mounting cavity, a first valve port, a second valve port, a third valve port, and a fourth valve port. The first valve port, the second valve port, the third valve port, and the fourth valve port all penetrate an inner side surface of the mounting cavity and an outer side surface of the valve body, and are configured to circulate fluid. The valve plug is accommodated in the mounting cavity and is rotatable relative to the valve body. A circumferential side of the valve plug includes a plurality of partition cavities. A working mode of the four-way valve includes a first mode, a second mode, and a third mode.

IPC Classes  ?

• F16K 11/085 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
• F16K 27/06 - Construction of housingsUse of materials therefor of taps or cocks
• H01M 10/63 - Control systems
• H01M 10/6568 - Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings

Abstract

This application provides a brake-by-wire system for a vehicle, the vehicle, and a control method for the brake-by-wire system for the vehicle. A brake controller is communicatively connected to a wheel speed sensor of each wheel of the vehicle. The brake controller is configured to output a second control signal in response to invalidity of a wheel speed sensor of one wheel on one axle. The second control signal is used to control two brake units corresponding to the other axle to output brake forces and control two brake units corresponding to the one axle to stop outputting brake forces. Therefore, even if the wheel speed sensor of the wheel on the one axle is invalid, a wheel on the other axle can still be controlled, to prevent the wheel on the other axle from being locked. This can improve traveling safety of the vehicle.

IPC Classes  ?

• B60T 8/1761 - Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure
• B60T 7/04 - Brake-action initiating means for personal initiation foot-actuated
• B60T 8/172 - Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
• B60T 8/88 - Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means

Abstract

The power module includes a first substrate, a second substrate, a first power device, a second power device, a potential moving point lead, and a ground lead. The second substrate, the first power device, the second power device, the potential moving point lead, and the ground lead are all disposed on a side of the first substrate. The first substrate includes a first insulation layer, a first conductive layer. The second substrate includes a second insulation layer and a first power distribution layer. The first power device and the second power device are electrically connected to the potential moving point lead, the first power device and the second power device are alternately turned on and turned off, the potential moving point lead and the first power distribution layer share potential, and the ground lead and the first conductive layer share potential.

IPC Classes  ?

• H01L 23/498 - Leads on insulating substrates
• H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
• H01L 23/373 - Cooling facilitated by selection of materials for the device
• H02S 40/30 - Electrical components

Abstract

A photovoltaic inverter system includes a lightning protection apparatus, a plurality of DC/DC conversion circuits, and an inverter circuit. Each DC/DC conversion circuit is connected to a component. The plurality of DC/DC conversion circuits are connected in parallel and then connected to the inverter circuit. The lightning protection apparatus includes a gas lightning protection unit and a first lightning protection unit. The gas lightning protection unit is separately connected to a first terminal of the component and a first terminal of another component. The first lightning protection unit is connected between the first terminal of the component and a grounding terminal. The gas lightning protection unit is configured to transmit, to the first lightning protection unit, a first current, namely a current introduced by any terminal of the another component. The first lightning protection unit is configured to transmit the first current and/or a second current to the grounding terminal.

IPC Classes  ?

• H02H 7/20 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02S 40/30 - Electrical components

Abstract

A motor for oil anti-leakage includes a motor housing and a motor stator. The motor housing includes a motor accommodating cavity which penetrates the motor housing along an axial direction of the motor. The motor accommodating cavity is configured to fasten the motor stator, and the motor accommodating cavity includes a stator cavity and an end cavity. The stator cavity and the end cavity are arranged adjacent to each other. An inner wall of the end cavity is a rough surface, and an inner wall of the stator cavity is a machined surface.

IPC Classes  ?

• H02K 9/193 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling mediumArrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with means for preventing leakage of the cooling medium
• B60K 1/00 - Arrangement or mounting of electrical propulsion units

Abstract

This application provides a resonant sensor, a battery, a battery pack, and an energy storage system. The resonant sensor includes the first substrate, the second substrate, and the third substrate which are all flexible substrates, the resonant sensor may operate in an environment with a flexible feature requirement.

IPC Classes  ?

• H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
• H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells

Abstract

The present application provides a photovoltaic inverter and a photovoltaic power generation system. The photovoltaic inverter has good effect. The photovoltaic inverter comprises at least one power semiconductor device, a radiator, a lower box body, and an upper box body, wherein the lower box body and the upper box body are arranged in a first direction; the lower box body is used for accommodating the at least one power semiconductor device; the radiator comprises two condensers and at least one evaporator; and the evaporator is configured to be connected to the condensers by means of two-phase pipes, in contact connection to the outer wall of the lower box body, and connected to the power semiconductor device in a heat-conductive manner. The upper box body comprises a middle partition plate and two ventilation openings oppositely arranged in a second direction; the middle partition plate is of a stepped structure in the second direction, and used for dividing a cavity of the upper box body into two sub-cavities; each sub-cavity is used for accommodating one condenser; and the two condensers are spaced apart from each other in the second direction.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A charging/discharging device (300), comprising resistance conversion circuits (320), connection confirm (CC) interfaces (312), and alternating current interfaces (311). One end of each resistance conversion circuit is grounded, and the other end of the resistance conversion circuit is connected to a CC interface; the CC interface and the alternating current interface are both used for connection to an electric vehicle (400); the resistance conversion circuit comprises a plurality of switches and a plurality of resistors; the plurality of switches are used for adjusting an equivalent resistance value of the resistance conversion circuit; the equivalent resistance value of the resistance conversion circuit is used for the electric vehicle to output an alternating current to the alternating current interface or used for the electric vehicle to receive an alternating current output by the alternating current interface. Also disclosed are a charging/discharging system and a charging/discharging method. By means of the charging/discharging device, the charging function and the discharging function of electric vehicles can be achieved, the charging and discharging operations are simple, and the device cost is low.

IPC Classes  ?

• B60L 53/00 - Methods of charging batteries, specially adapted for electric vehiclesCharging stations or on-board charging equipment thereforExchange of energy storage elements in electric vehicles
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• B60L 53/22 - Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• B60L 53/62 - Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
• B60L 55/00 - Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements

Abstract

This application provides a control apparatus for a power system of an electric vehicle and a related device thereof. The control apparatus obtains a driving mode of the electric vehicle, a running parameter of the electric vehicle, and a running parameter of the power system, and in response to an accelerator signal or a brake signal of the electric vehicle, outputs a torque allocation ratio of a front drive motor to a rear drive motor based on the driving mode of the electric vehicle, the running parameter of the electric vehicle, and the running parameter of the power system. During implementation of this application, the motor is flexibly controlled by considering impact of a plurality of factors, to achieve good reliability.

IPC Classes  ?

• B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• B60L 15/00 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train

Abstract

This application provides a motor controller, a drive circuit, a power device. The motor controller includes a bridge arm circuit and a drive circuit. The bridge arm circuit includes a plurality of switching transistor bridge arms. The drive circuit is configured to provide a plurality of drive voltages to a plurality of switching transistors of the bridge arm circuit respectively. The drive circuit includes a plurality of transformers, a primary-side switch, and a control unit. A primary-side winding of each transformer includes a primary-side primary winding and a primary-side feedback winding. A secondary-side winding of each transformer is configured to output one drive voltage. One end of each primary-side primary winding is configured to connect to a power supply. The other end of each primary-side primary winding is connected to an end of the primary-side switching transistor. The motor controller reduces structural complexity of the drive circuit.

IPC Classes  ?

• H02P 29/024 - Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load

Abstract

A power conversion apparatus, wherein two bus capacitors are connected in series between a direct current bus, and the direct current bus is connected to a first output end and a second output end of the power conversion apparatus. An input end of a first direct current conversion circuit is connected to a first group of first input ends, and an output end of a first direct current conversion circuit is connected to two ends of a first bus capacitor. An input end of a second direct current conversion circuit is connected to a second group of second input ends, and an output end of the second direct current conversion circuit is connected to two ends of a second bus capacitor. A first group of second input ends are connected to the direct current bus, and a second group of first input ends are connected to the direct current bus.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02J 3/01 - Arrangements for reducing harmonics or ripples
• H02J 3/28 - Arrangements for balancing the load in a network by storage of energy
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/14 - Arrangements for reducing ripples from DC input or output

Abstract

A power conversion device, comprising a housing, and a first circuit board, one or more switching transistors, one or more inductors and multiple capacitors which are located in the housing. The first circuit board is arranged opposite to a bottom plate of the housing in a first direction; the one or more switching transistors, the one or more inductors, and the multiple capacitors are all fixed to the first circuit board and located between the first circuit board and the bottom plate of the housing; the bottom plate of the housing comprises a first cavity, a second cavity, and a third cavity which are communicated in sequence; the first cavity is used for accommodating the multiple capacitors, the second cavity is used for accommodating the one or more switching transistors, and the third cavity is used for accommodating the one or more inductors; and in the first direction, the depth of the second cavity is less than the depth of the first cavity and less than the depth of the third cavity.

IPC Classes  ?

• H02M 7/00 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

Provided in the present application are a double-motor power assembly having an integrated housing, and an electric vehicle. The double-motor power assembly comprises two middle housings and a middle partition plate, a receiving cavity of each middle housing being configured to receive a speed reducer and a motor. The middle partition plate comprises two partition plate mounting surfaces, which are opposite to each other, each partition plate mounting surface being configured to be fixedly connected to one middle housing. Each partition plate mounting surface comprises two partition plate oil holes, the partition plate oil holes of the two partition plate mounting surfaces facing away from each other. The two partition plate oil holes of each partition plate mounting surface are in communication with each other by means of one inner oil channel of the middle partition plate, and the two partition plate oil holes of each partition plate mounting surface are in communication with one heat exchanger and the receiving cavity by means of two inner oil channels of one middle housing correspondingly. In the present application, the two independent oil channels are formed in the middle partition plate so as to independently supply oil to the receiving cavities of the two middle housings, and the situation whereby the distribution of cooling oil in the double-motor power assembly is uneven is relieved; therefore, the working efficiency of the double-motor power assembly is improved.

IPC Classes  ?

• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium

Abstract

A power conversion system including N power conversion units and a control unit, which can control, in a control periodicity, operating modes of one or more target power conversion units in the N power conversion units to be switched between a PR mode and an MPPT mode, and update a reference power based on a maximum power obtained in the MPPT mode, for an operating power of the target power conversion unit obtained in the PR mode to be an updated reference power, and the updated reference power is less than or equal to the maximum power. In addition, the control unit further controls an operating mode of a power conversion unit other than the target power conversion unit in the N power conversion units to remain unchanged, so that the power conversion unit other than the target power conversion unit does not perform mode switching.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H02M 1/00 - Details of apparatus for conversion

Abstract

A system includes a power supply, a collector, and a photovoltaic inverter. The photovoltaic inverter includes a controllable switch on a direct current side, an inverter unit, a controllable switch on an alternating current side, a collector configured to obtain a power supply parameter of the photovoltaic power supply system, a first controller, and a second controller. When the power supply parameter of the photovoltaic power supply system is greater than or equal to a power supply parameter threshold, the first turns off the controllable switch on the direct current side to disconnect an electrical connection between a power supply and the inverter unit. When the power supply parameter of the photovoltaic power supply system is greater than or equal to the power supply parameter threshold, the second controller turns off the controllable switch on the alternating current side to disconnect an electrical connection between the inverter unit and a load.

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 7/00 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output