Embodiments of the present application provide a method and apparatus of determining a dispensing position, a dispensing system for batteries, an electronic device and a medium. The method of determining a dispensing position includes receiving an image of a battery module, processing the image to obtain a contour feature image of at least one object on the battery module, and determining, based on the contour feature image, a dispensing position of the at least one object.
The present application relates to the field of batteries and provides a battery distribution box, a battery, and an electric device. The battery distribution box provided in the present application comprises a shell, an electrical assembly and a heat dissipation cover plate, wherein an accommodating cavity having an opening is formed in the shell; the electrical assembly is arranged in the accommodating cavity, and the electrical assembly comprises a plurality of electrical elements and conductive connectors connected to the electrical elements; the heat dissipation cover plate is connected to the shell to cover the opening, and the conductive connectors are at least partially in contact with the heat dissipation cover plate to achieve heat conduction. The conductive connectors being in contact with the heat dissipation cover plate enables a simplified manner of connection between the conductive connectors and the cover plate with heat dissipation function, reduced extension length of the conductive connectors, and improved space utilization rate of the battery distribution box.
A dimension measuring apparatus and a dimension measuring method. The dimension measuring apparatus comprises a frame (10), a measurement region being provided on the frame (10); two first dimension measuring devices (20), which are provided on the frame (10), the two first dimension measuring devices (20) being located on two opposite sides of the measurement region; and two second dimension measuring devices (30), which are provided on the frame (10), the two second dimension measuring devices (30) being located on the other two opposite sides of the measurement region. The first dimension measuring devices (20) each comprise a first motion device and a first image acquisition assembly, and the first motion devices can drive the first image acquisition assemblies to move. The second dimension measuring device (30) each comprise a second motion device and a second image acquisition assembly, and the second motion devices can drive the second image acquisition assemblies to move. The dimension measuring apparatus is an apparatus used for measuring geometric tolerances for various surfaces of large-size products, can achieve comprehensive acquisition and measurement for dimensional information and can improve the measurement accuracy to a certain extent.
Provided in the present application are a battery cover plate, a battery cell, a battery, and an electric device, which solve the problem of a sensor being prone to detaching from a catch. The battery cover plate comprises a plastic plate, a detection element, and a top cover plate, wherein a mounting groove is formed in a first plate surface of the plastic plate; the detection element is mounted in the mounting groove; the top cover plate is arranged on the first plate surface; and part of the top cover plate covers an opening of the mounting groove.
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
H01M 50/148 - Couvercles caractérisés par leur forme
5.
BATTERY COVER PLATE, BATTERY CELL, BATTERY AND ELECTRIC DEVICE
A battery cover plate (122), a battery cell (12), a battery (1), and an electric device (2). The battery cover plate (122) may comprise a top cover plate (1221) and a detection assembly (1222). The top cover plate (1221) has a first plate surface (12212) and a second plate surface (12213) which face away from each other, and a first through hole (12211) passing through the first plate surface (12212) and the second plate surface (12213). The first through hole (12211) is staggered from a pole (125), a liquid injection hole (127) and a pressure relief valve (126). The detection assembly (1222) is embedded in the first through hole (12211) and blocks the first through hole (12211).
H01M 50/15 - Couvercles caractérisés par leur forme pour des cellules prismatiques ou rectangulaires
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
Provided are a floating plug-in apparatus, an air tightness detection device, and an air tightness detection method. The floating plug-in apparatus (100) comprises a guide assembly and a first floating adjustment mechanism. The guide assembly comprises a first guide member (110) and a second guide member (120). The first floating adjustment mechanism comprises: a first floating member (130) extending along a first direction (X), wherein the first guide member (110) and the second guide member (120) are respectively provided at two opposite ends of the first floating member (130) in the first direction (X); and a first floating adjustment assembly (140), wherein the first floating adjustment assembly (140) is connected to the first floating member (130) and used for driving the first floating member (130) to perform position adjustment along the first direction (X). The first floating adjustment mechanism is used for performing coarse positioning in the first direction (X), so as to allow automatic correction along the first direction (X), thereby alleviating, reducing or eliminating the risk of side leakage and the problem that a plug mechanism (400) is easily damaged when the plug mechanism (400) of the floating plug-in apparatus (100) is plugged into a communication port of a cooling member (200).
A sealing structure (100) and an electrical apparatus, relating to the technical field of batteries. The sealing structure (100) is used for sealing gaps between a battery pack box body (110) and an electrical apparatus frame (130). The sealing structure (100) comprises: a first sealing member (165), which extends circumferentially around the upper surface of the battery pack box body (110) and is arranged at a first gap (170) between the upper surface of the battery pack box body (110) and the electrical apparatus frame (130) so as to seal the first gap (170); and a second sealing member (180), which extends circumferentially around the periphery of the battery pack box body (110) and is arranged at a second gap (190) between the battery pack box body (110) and the electrical apparatus frame (130) so as to seal the second gap (190).
H01M 50/249 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports spécialement adaptés aux aéronefs ou aux véhicules, p. ex. aux automobiles ou aux trains
8.
ELECTRODE SHEET DIE-CUTTING METHOD AND ELECTRODE SHEET DIE-CUTTING DEVICE
An electrode sheet die-cutting method and an electrode sheet die-cutting device. The electrode sheet die-cutting method comprises: providing an electrode sheet material (900); in the process of die-cutting the electrode sheet material (900) by die-cutting units (120) to generate an electrode sheet (901) having a single-cell electrode sheet length, a defect detection unit performing defect detection on the electrode sheet material (900), wherein the electrode sheet (901) having the single-cell electrode sheet length is indicated by a mark (911) die-cut on the electrode sheet (901); and in response to detection of the presence of a defect (990) on the electrode sheet material (900) by the defect detection unit, depending on the position where the detected defect (990) is located on a first electrode sheet which is undergoing die-cutting, terminating the die-cutting of the first electrode sheet, and starting die-cutting of a second electrode sheet.
B21D 28/02 - Découpage à l'emporte-pièce ou poinçonnage de flans ou d'objets, avec ou sans production de déchetsEntaillage
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
A conveying device and a production line. The conveying device comprises a support frame (1), a conveyor belt (2), a first shaft (3), a second shaft (4), supporting seats (5), and bearing seats (6). The first shaft (3) passes through an annular space (2a) defined by the conveyor belt (2). The second shaft (4) passes through the annular space (2a) defined by the conveyor belt (2), and the first shaft (3) and the second shaft (4) are respectively located at the two ends of the conveyor belt (2) in the conveying direction. The supporting seats (5) are arranged on the support frame (1), two axial ends of the first shaft (3) are each provided with one supporting seat (5), and shaft ends of the first shaft (3) are detachably connected to the supporting seats (5). The bearing seats (6) are arranged on the support frame (1), two axial ends of the second shaft (4) are each provided with one bearing seat (6), and shaft ends of the second shaft are detachably connected to the bearing seats (6).
B65G 47/24 - Dispositifs pour influencer la position relative ou l'orientation des objets pendant le transport par transporteurs présentant les objets selon un orientement donné
10.
SWITCHING AND CONVEYING DEVICE AND PRODUCTION LINE
A switching and conveying device and a production line. The switching and conveying device comprises a frame (11), a driving source, and a switching table (12). The switching table (12) is arranged on the frame (11). The switching table (12) comprises a driving mechanism (121), a bearing seat (123), and a plurality of conveying mechanisms (122). The driving mechanism (121) and the conveying mechanisms (122) are all arranged on the bearing seat (123). The plurality of conveying mechanisms (122) are arranged in a first direction. The driving mechanism (121) comprises a reversing assembly (1211) and a power motor (1212) provided with a power shaft. The reversing assembly (1211) is connected to the power shaft and the conveying mechanisms (122). The power shaft rotates, so that the reversing assembly (1211) drives the conveying mechanisms (122) to move in the first direction. The conveying mechanisms (122) move in the first direction so as to change the distance between every two adjacent conveying mechanisms (122) in the first direction. The driving source is connected to the bearing seat (123), so as to drive the switching table (12) to move in the first direction. In this way, one power motor can drive all the conveying mechanisms (122) to perform translational motion, thereby conveniently changing the distance between every two adjacent conveying mechanisms (122), and thus satisfying the conveying requirements of different types of battery cells.
Embodiments of the present disclosure relate to the technical field of batteries, and provide an adhesive application system and an adhesive application method. A supporting device and/or a mounting base is connected to a first driving mechanism, so that one of the supporting device and the mounting base moves relative to the other one of the supporting device and the mounting base. An adhesive roller, a first storage roller and a second storage roller of a material roller assembly are all rotatably connected to the mounting base; the adhesive roller drives an adhesive roll to rotate; the first storage roller winds a first release paper; and the second storage roller winds a second release paper. A pressing roller is rotatably connected to the mounting base, and the pressing roller is used for conveying the second release paper and pressing an adhesive on the second release paper to an adhesive application object. A second driving mechanism is mounted on the mounting base, and the first storage roller and the second storage roller are both drivingly connected to the second driving mechanism, to at least drive the first storage roller and the second storage roller to rotate.
A buffer heat-insulating pad (100), a battery module (200), a battery pack (300), an energy storage system, and an electric device (400). A pad body (10) comprises a first body portion (11) and a second body portion (12); the first body portion (11) is arranged around the second body portion (12); at least one second body portion (12) is provided; the first body portion (11) and the second body portion (12) are made of the same material; and the compressive deformation capacity of the first body portion (11) is better than that of the second body portion (12).
H01M 50/244 - Boîtiers secondairesBâtisDispositifs de suspensionDispositifs de manutentionSupports caractérisés par leur procédé de montage
H01M 50/242 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par les propriétés physiques des boîtiers ou des bâtis, p. ex. dimensions adaptés pour protéger les batteries contre les vibrations, les collisions ou le gonflement
H01M 50/291 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par des éléments d’espacement ou des moyens de positionnement dans les racks, les cadres ou les blocs caractérisés par leur forme
H01M 50/293 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par des éléments d’espacement ou des moyens de positionnement dans les racks, les cadres ou les blocs caractérisés par le matériau
13.
FILM WRAPPING SYSTEM AND INSPECTION METHOD THEREFOR
The present application provides a film wrapping system and an inspection method therefor. The film wrapping system comprises a conveying assembly, a plurality of image acquisition devices, and a superordinate computer; the conveying assembly is used for conveying a dummy battery cell on a conveying path in a film wrapping process when a film wrapping device needs to be inspected; the plurality of image acquisition devices are used for acquiring a target image of a target surface of the dummy battery cell when determining that the dummy battery cell reaches an inspection site on the conveying path in the film wrapping process; and the superordinate computer is used for inspecting the plurality of image acquisition devices on the basis of the target image to obtain inspection results of the plurality of image acquisition devices.
G06V 10/75 - Organisation de procédés de l’appariement, p. ex. comparaisons simultanées ou séquentielles des caractéristiques d’images ou de vidéosApproches-approximative-fine, p. ex. approches multi-échellesAppariement de motifs d’image ou de vidéoMesures de proximité dans les espaces de caractéristiques utilisant l’analyse de contexteSélection des dictionnaires
The present application relates to the technical field of batteries, and discloses a battery cell, a battery, and an electric device. The battery cell comprises a casing, an end cover, an electrode assembly and an insulating protection member; the casing is provided with an opening; the end cover covers the opening; a pressure relief structure is arranged on the end cover; the electrode assembly is arranged in the casing; the insulating protection member is arranged on the side of the end cover facing the electrode assembly; the insulating protection member comprises a body; supporting structures are respectively connected to opposite ends of the body; the side of each supporting structure facing away from the end cover protrudes from the body; the supporting structures on the two ends of the body are provided with first side walls facing each other; and the supporting structure on at least one end of the body is provided with a first communication port and a second communication port which are communicated with each other, the first communication port is formed in the first side wall, and the second communication port is at least formed in a bottom wall of the supporting structure adjacent to the first side wall. When the battery cell falls or vibrates, an electrolyte or airflow can be distributed, reducing the possibility of electrolyte leakage due to the pressure relief structure being impacted and opened.
The present application provides a film coating device and a film coating method. The film coating device comprises: a feeding mechanism, used for conveying battery cells in the process of coating the battery cells, the feeding mechanism comprising a conveying platform used for placing and conveying the battery cells to move towards the film coating position; a pushing mechanism, used for pushing the battery cells to move towards the film coating position relative to the conveying platform; and a film stretching and coating mechanism, arranged on the tail end side of the moving direction of the conveying platform and used for carrying out film stretching and coating on the battery cells.
An electrode sheet processing device, a battery production line, and a control method for an electrode sheet processing device, relating to the technical field of battery production. The electrode sheet processing device can improve the production efficiency, and can also increase the electrode sheet processing pass rate. The electrode sheet processing device comprises: an unwinding mechanism, a tab forming mechanism, a recycling mechanism, and a slitting mechanism; the unwinding mechanism is configured to bear a wound electrode sheet to be processed; the tab forming mechanism is arranged on an extension path of the electrode sheet to be processed and configured to cut the electrode sheet to be processed; the recycling mechanism is arranged on an extension path of a cut electrode sheet and located on the side of the tab forming mechanism distant from the unwinding mechanism; the recycling mechanism is configured to clean waste formed after the electrode sheet to be processed is cut; along the extension path of the cut electrode sheet, the slitting mechanism is arranged on the side of the recycling mechanism distant from the tab forming mechanism, and the slitting mechanism is configured to slit the cut electrode sheet.
H01M 10/0587 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure enroulés, c.-à-d. des électrodes positives enroulées, des électrodes négatives enroulées et des séparateurs enroulés
A battery cell (10), a battery (100), and an electrical apparatus (1000). The battery cell (10) comprises: a housing (11), comprising a housing cover (112) and a housing body (111), wherein the housing (11) is provided with electrode columns (12); an electrode assembly (2), comprising a conductive portion (22) and an active substance coating portion (21), wherein the conductive portion (22) is electrically connected to the active substance coating portion (21) and the electrode columns (12); a support (3), arranged within the housing body (111) and located at the end of the active substance coating portion (21) away from the housing cover (112); an insulating piece (4), comprising a main body insulating portion (41), a first insulating portion (42) and a second insulating portion (43), wherein the main body insulating portion (41) is arranged on the peripheral side of the active substance coating portion (21), the first insulating portion (42) is arranged between the support (3) and the end of the active substance coating portion (21) away from the housing cover (112), and the second insulating portion (43) is arranged at the end of the active substance coating portion (21) close to the housing cover (112). The risk of failure and damage of the electrode assembly (2) is reduced, the risk of corrosion of the housing (11) is reduced, and the reliability and stability of the battery cell (10) are improved.
The present disclosure relates to the technical field of batteries. Disclosed are a handling apparatus, a battery production line, and a control method for a handling apparatus. The handling apparatus can reduce the risk of a target object colliding and thus being damaged in the process of handling the target object. The handling apparatus comprises: a conveying device, a gripping device and a detection device, wherein the conveying device has a first driving mechanism; the gripping device is arranged on the first driving mechanism and is used for gripping a target object; the detection device is arranged on the gripping device and is electrically connected to the first driving mechanism; and when, by means of the detection device, it is detected that the target object gripped by the gripping device is about to collide or has collided, the first driving mechanism can drive the gripping device to move in the direction approaching the conveying device. The handling apparatus provided in the present disclosure is used for handling items.
A paper stripping apparatus, a paper stripping method, an adhesive pasting device, and an adhesive pasting method. The paper stripping apparatus is used for performing paper stripping operation on at least two sheets, and the paper stripping operation comprises a paper stripping action for stripping release paper from a bonding surface and a detection action for detecting whether the release paper after the paper stripping action is completely stripped or not. The paper stripping apparatus comprises a base, a paper stripping mechanism, a first detection camera, and a second detection camera. The paper stripping mechanism is used for performing a paper stripping action on at least two sheets sequentially arranged in a first direction; the second detection camera is located on one side of the first detection camera in the first direction, and the first detection camera and the second detection camera are configured to be capable of moving close to or away from each other, so that sheets are located in the photographing fields of view of the first detection camera and the second detection camera; and the first detection camera and the second detection camera are configured to jointly perform a detection action on a plurality of sheets.
B65H 37/04 - Appareils délivrant des articles ou des bandes, comportant des dispositifs pour exécuter des opérations auxiliaires particulières pour fixer ensemble des articles ou des bandes, p. ex. par adhésifs, piqûre ou brochage
The present application relates to the technical field of batteries, and relates to a battery cell, a battery, and an electric device. The battery cell comprises an electrode assembly and first limiting members; the electrode assembly comprises a first end surface, a second end surface, and a third end surface; the first end surface and the second end surface are arranged opposite to each other in a first direction, and the third end surface is connected to one end of the same side of the first end surface and the second end surface in a second direction; the first direction is the thickness direction of the electrode assembly, and the second direction is perpendicular to the thickness direction of the electrode assembly; the first limiting members each comprise a first limiting portion, a second limiting portion, and a third limiting portion; the first limiting portion is connected to the first end surface, the second limiting portion is connected to the second end surface, the third limiting portion is connected to the first limiting portion and the second limiting portion, and the third limiting portion and the third end surface are arranged opposite to each other in the second direction; and a first strength weakening area is provided on the third limiting portion, so that the third limiting portion is torn when the expansion coefficient of the electrode assembly in the first direction exceeds a preset value.
The present application provides an electrode assembly, a battery cell, a battery, and an electrical device. The electrode assembly comprises electrode sheets, and the electrode sheets are wound in a winding direction; the electrode assembly has two first planes opposite to each other in a first direction, two second planes opposite to each other in a second direction, and arc-shaped surfaces, each arc-shaped surface is connected to two adjacent first plane and second plane, and the winding direction, the first direction and the second direction intersect in pairs; surfaces, where two ends of one arc-shaped surface are connected to a center line, and the corresponding arc-shaped surface define a bending area; each electrode sheet comprises a current collector and an active material layer, and the active material layer is coated on the current collector; the current collector in at least the bending area comprises an elastic layer and a conductive layer, the conductive layer is arranged on at least one side of the elastic layer in the thickness direction, and the active material layer is coated on the side of the conductive layer facing away from the elastic layer.
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
H01M 10/0587 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure enroulés, c.-à-d. des électrodes positives enroulées, des électrodes négatives enroulées et des séparateurs enroulés
H01M 50/533 - Connexions d’électrodes dans un boîtier de batterie caractérisées par la forme des conducteurs ou des languettes
22.
ENERGY STORAGE DEVICE, CONTROL METHOD FOR ENERGY STORAGE DEVICE, AND ELECTRIC DEVICE
An energy storage device, a control method for an energy storage device, and an electric device. The energy storage device comprises a battery (21), an energy storage device positive electrode end (22), an energy storage device negative electrode end (23), and an on-off device (24); when the state of the battery (21) is normal, the energy storage device supplies power to the electric device through a first loop, wherein the first loop comprises the energy storage device positive electrode end (22), the energy storage device negative electrode end (23), a positive electrode end of the battery (21), and a negative electrode end of the battery (21); and when the state of the battery (21) is abnormal, the on-off device (24) is in an on state, and the energy storage device supplies power to the electric device through a second loop, wherein the second loop comprises the energy storage device positive electrode end (22), the energy storage device negative electrode end (23), the positive electrode end of the battery (21), the negative electrode end of the battery (21), and the on-off device (24). When the energy storage device is used in the whole vehicle, the energy storage device can still supply power to the whole vehicle through the second loop when the state of the battery (21) is abnormal, thereby reducing the probability of traffic accidents caused by power loss of the whole vehicle.
B60L 3/00 - Dispositifs électriques de sécurité sur véhicules propulsés électriquementContrôle des paramètres de fonctionnement, p. ex. de la vitesse, de la décélération ou de la consommation d’énergie
B60L 50/60 - Propulsion électrique par source d'énergie intérieure au véhicule utilisant de la puissance de propulsion fournie par des batteries ou des piles à combustible utilisant de l'énergie fournie par des batteries
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
23.
DISCHARGING APPARATUS AND DISCHARGING CONTROL METHOD
A discharging apparatus and a discharging control method. The discharging apparatus is applied to an encapsulation film inspection device, and comprises a temporary-storage and conveying mechanism (200), a first pairing mechanism (300), a second pairing mechanism (400), a first transplanting mechanism (500) and a control apparatus (10), wherein the control apparatus is used for controlling the first transplanting mechanism to move target battery cells, which meet a first carrying condition, in the temporary-storage and conveying mechanism to the first pairing mechanism, and is further used for moving target battery cells, which meet a second carrying condition, to the second pairing mechanism to perform pairing and combination, and moving target battery cells, which meet the first carrying condition, in the second pairing mechanism to the first pairing mechanism; and the control apparatus is further used for controlling, when a plurality of conveying stations of the first pairing mechanism are fully loaded with the target battery cells, the first pairing mechanism to transfer the target battery cells on the plurality of conveying stations to the next station. The present application is used for solving the problem of it being impossible for an encapsulation film inspection device to meet production capacity requirements due to low sorting and pairing efficiency during discharging.
B65G 47/74 - Dispositifs d'alimentation, de transfert ou de déchargement de genres ou types particuliers
B65G 43/08 - Dispositifs de commande actionnés par l'alimentation, le déplacement ou le déchargement des objets ou matériaux
B65G 35/00 - Transporteurs mécaniques non prévus ailleurs
B65G 37/00 - Combinaisons de transporteurs mécaniques de même type ou de types différents sauf en ce qui concerne leur application dans des machines particulières ou leur emploi dans des procédés particuliers de fabrication
B07C 5/34 - Tri en fonction d'autres propriétés particulières
B07C 5/36 - Appareils trieurs caractérisés par les moyens qu'ils utilisent en vue de la distribution
Provided in the present application are an electrode assembly, a battery cell, a battery and an electrical device. The electrode assembly comprises a first electrode sheet and a second electrode sheet which have opposite polarities. The first electrode sheet comprises a first electrode sheet body, wherein the first electrode sheet body comprises a first current collecting body and first active material layers, the first current collecting body comprising two first surfaces opposite each other in the direction of thickness of the first current collecting body, and a first end face connecting the two first surfaces, and the first active material layers being arranged on the first surfaces. The electrode assembly further comprises an insulating member connected to the first electrode sheet body, wherein at least part of the insulating member is arranged on the outer side of the first end face in a first direction, the first direction being perpendicular to the direction of thickness. The insulating member can separate burrs on the first end face from the second electrode sheet, thereby reducing the risk of conduction between the burrs and the second electrode sheet and reducing the possibility of thermal runaway caused by a short circuit, improving the reliability of the battery cell.
H01M 50/586 - Moyens pour empêcher un usage ou une décharge indésirables pour empêcher les contacts incorrects à l’intérieur ou à l’extérieur des batteries à l’intérieur des batteries p. ex. les contacts incorrects des électrodes
A liquid injection device and a production line. The liquid injection device comprises a vacuumizing air circuit (1), a first-stage cup (2), a second-stage cup (3), a plurality of liquid injection circuits (4) and a plurality of liquid-passing assemblies (5); a plurality of mutually isolated buffer cavities are formed in the first-stage cup (2); a plurality of mutually isolated liquid injection cavities are formed in the second-stage cup (3), and each liquid injection cavity is communicated with the vacuumizing air circuit (1); each liquid injection circuit (4) is communicated with one buffer cavity; the liquid-passing assemblies (5), the buffer cavities, and the liquid injection cavities are arranged in a one-to-one correspondence mode, each liquid-passing assembly (5) comprises a liquid-passing channel (51) and a first switch member (52), the liquid-passing channel (51) is communicated with one buffer cavity and one liquid injection cavity, and the first switch member (52) is arranged in the liquid passing channel (51) so as to selectively open or close the liquid-passing channel (51). By means of the vacuumizing air circuit (1), the first-stage cup (2), the second-stage cup (3), the plurality of liquid injection circuits (4) and the plurality of liquid-passing assemblies (5), liquid preparation and vacuumizing can be carried out simultaneously, the liquid injection duration can be shortened, and one liquid injection device can inject liquid into a plurality of battery cells, further improving production efficiency.
Provided in the present application are a secondary battery and an electric device. An electrolyte of the secondary battery comprises a first additive having a structure as represented by formula I and a second additive comprising at least one of an alkali metal salt of difluorophosphoric acid, an alkali metal salt of tetrafluoroboric acid, an alkali metal salt of fluorosulfonic acid and an alkali metal salt of difluoro oxalato boric acid, wherein the mass content W2 of the second additive in the electrolyte is 0.01%≤W2%≤5%; and the ratio of the mass content W2 of the second additive in the electrolyte to the mass content W1 of the first additive in the electrolyte is 0.02≤W2/W1≤10. The secondary battery has a good cathode-anode interface membrane, thereby having excellent cycle performance and storage performance.
H01M 10/0567 - Matériaux liquides caracterisés par les additifs
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
Provided in the present application are a battery and a vehicle. The battery comprises battery cells, a box body and a protection plate, the battery cells being provided with explosion-proof valves. The battery cells are accommodated in the box body, the box body being provided with a box wall, and the explosion-proof valves facing the box wall. The protection plate is located between the battery cells and the box wall and is arranged to cover the battery cells, exhaust holes being formed in the positions of the protection plate corresponding to the explosion-proof valves, and the exhaust holes penetrating through the protection plate. When the battery is installed on a vehicle, the protection plate is located between the battery cells and the ground. Providing between the battery cells and the box wall of the battery the protection plate for fixing the battery cells reduces the movement of the bottoms of the battery cells relative to the box wall, thus reducing the probability of scraping the bottoms of the battery cells, improving the safety and reliability of the battery, and enhancing the self-protection performance of the battery. Moreover, the exhaust holes are formed in the positions of the protection plate corresponding to the explosion-proof valves of the battery cells, such that gas in the explosion-proof valves can be quickly discharged, thereby reducing the risk of thermal runaway.
H01M 50/264 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports avec des moyens de fixation, p. ex. des serrures pour des cellules ou des batteries, p. ex. cadres périphériques, courroies ou tiges
A battery cell (10), a battery (100), and an electric device. The battery cell (10) comprises a casing (1) and a pressure relief component (6); the casing (1) comprises a first wall portion (13); the pressure relief component (6) is provided on the first wall portion (13); the pressure relief component (6) comprises a first groove (61); the first groove (61) defines at least one predetermined pressure relief area (63); and the pressure relief component (6) is configured to be capable of cracking along at least part of the first groove (61) when the battery cell (10) undergoes pressure relief. The pressure relief component (6) further comprises a groove group (62); the groove group (62) is in one-to-one correspondence with the predetermined pressure relief area (63); each groove group (62) comprises a plurality of second grooves (621); the plurality of second grooves (621) are arranged at intervals in the width direction of the second grooves (621); and the second grooves (621) are configured to guide at least part of the predetermined pressure relief area (63) to flip so as to open the at least part of the predetermined pressure relief area (63). The plurality of second grooves (621) all can help the predetermined pressure relief area (63) to flip, such that flipping of the predetermined pressure relief area (63) is easier, the flipping difficulty of the predetermined pressure relief area (63) is reduced, and the risk of fire or explosion during thermal runaway of the battery cell (10) is reduced, thereby improving the reliability of the battery cell (10).
Embodiments of the present application provide a thermal diffusion testing method, a test device, and a computer readable storage medium. The method comprises: triggering thermal runaway in a first battery cell within a test battery, wherein the power level of the test battery satisfies a first preset condition, and the temperature of the test battery satisfies a second preset condition; acquiring battery parameter information of a second battery cell within the test battery, wherein the second battery cell and the first battery cell satisfy a first positional relationship; and on the basis of the battery parameter information of the second battery cell, determining whether thermal diffusion occurs in the test battery. The method, the test device, and the computer readable storage medium provided in the embodiments of the present application can improve the reliability and accuracy of thermal diffusion testing.
G01R 31/374 - Dispositions pour le test, la mesure ou la surveillance de l’état électrique d’accumulateurs ou de batteries, p. ex. de la capacité ou de l’état de charge avec des moyens pour corriger la mesure en fonction de la température ou du vieillissement
A battery cell (20), a battery and an electric device. The battery cell (20) comprises a housing (21) and a pressure relief component (22), wherein the housing (21) comprises a first wall portion (211); the pressure relief component (22) is arranged on the first wall portion (211), and the pressure relief component (22) is provided with a first recess (221); the first recess (221) is recessed from a first surface (2111) in the thickness direction of the first wall portion (211) towards a second surface (2112), and the first recess (221) defines at least one predetermined pressure relief region (P); the pressure relief component (22) is configured to be able to crack along at least a portion of the first recess (221) when the pressure of the battery cell (20) is relieved; and the sum S1 of the areas of all predetermined pressure relief regions (P) is 0.03 to 0.3 times the area S2 of the first surface (2111). Risks such as cracking and explosion of the housing (21) of the battery cell (20) and same catching fire that are caused by the pressure relief component (22) failing to relieve pressure in a timely manner can be reduced, and the risk of electrolyte leakage caused by early actuation, fatigue cracking, etc., of the pressure relief component (22) after long-term use of the battery cell (20) is reduced, thereby facilitating improvements in the service life and the usage reliability of the battery cell (20).
H01M 50/30 - Aménagements pour faciliter l’échappement des gaz
H01M 50/131 - Boîtiers primairesFourreaux ou enveloppes caractérisés par les propriétés physiques, p. ex. la perméabilité au gaz, les dimensions ou la résistance à la chaleur
H01M 50/233 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par les propriétés physiques des boîtiers ou des bâtis, p. ex. dimensions
H01M 50/103 - Boîtiers primairesFourreaux ou enveloppes caractérisés par leur forme ou leur structure physique prismatique ou rectangulaire
H01M 50/249 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports spécialement adaptés aux aéronefs ou aux véhicules, p. ex. aux automobiles ou aux trains
A battery cell (7), a battery (2), and an electric device. A liquid injection hole (21) is formed in the battery cell (7), and a liquid injection pressure relief member (6) is provided in the liquid injection hole (21). The liquid injection pressure relief member (6) comprises a cylinder (601) and a push rod assembly (602). The cylinder (601) is arranged at the liquid injection hole (21); a cavity (603) and an opening (604) communicated with the cavity (603) are formed in the cylinder (601); a through hole (605) communicated with the cavity (603) is further formed in the cylinder (601); and the through hole (605) is arranged toward the interior of the battery cell (7). The push rod assembly (602) is arranged in the cavity (603); an end of the push rod assembly (602) is provided with a first positioning portion (606) protruding outward in the circumferential direction; the first positioning portion (606) matches the through hole (605) and seals the through hole (605); and the push rod assembly (602) can move relative to the cylinder (601) to communicate the through hole (605) with the cavity (603) so as to achieve exhaust or liquid injection. The liquid injection pressure relief member (6) is provided in the liquid injection hole (21), and an original liquid injection hole structure (6) on the battery cell (7) can be used, thereby reducing the extra occupied space, simplifying the processing steps, and reducing the processing difficulty. One component achieves both a liquid injection function and an exhaust function, thereby improving the integration level and manufacturing efficiency of the battery cell (7).
The present application relates to the technical field of batteries, and provides a battery cell, a battery, and an electric device. The battery cell comprises an electrode assembly, and the electrode assembly comprises an electrode sheet and an adhesive tape. The electrode sheet is wound along a preset winding direction, and the electrode sheet comprises a first end close to a winding start point and a second end close to a winding end point. The adhesive tape is at least partially bonded to the surface of the first end and/or the second end of the electrode sheet, wherein the adhesive tape comprises through holes passing through the adhesive tape along the thickness direction. According to the battery cell provided by the embodiments of the present application, the adhesive tape is bonded to the surface of the first end of the electrode sheet close to the winding start point, so that the supporting effect of a central hole of the electrode assembly can be improved; the adhesive tape is bonded to the surface of the second end of the electrode sheet close to the winding end point, so that the termination and fixation effects of the electrode sheet can be achieved, thereby preventing the wound electrode assembly from loosening; and the adhesive tape comprises the through holes passing through the adhesive tape along the thickness direction, so that the infiltration effect of an electrolyte during injection into the battery cell can be improved, thereby improving the cycle performance of the battery cell.
H01M 10/0587 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure enroulés, c.-à-d. des électrodes positives enroulées, des électrodes négatives enroulées et des séparateurs enroulés
33.
WELD SEAM DETECTION METHOD AND APPARATUS, ELECTRONIC DEVICE, AND STORAGE MEDIUM
A weld seam detection method and apparatus, an electronic device, and a storage medium, relating to the technical field of battery production. The method comprises: on the basis of a first detection image acquired by an image acquisition device for a weld seam to be detected, determining defects and defect parameters of said weld seam; obtaining scores of the defects on the basis of the defect parameters; and determining a detection result of said weld seam on the basis of the scores of the defects.
G01N 21/88 - Recherche de la présence de criques, de défauts ou de souillures
G06V 10/776 - ValidationÉvaluation des performances
G06V 10/764 - Dispositions pour la reconnaissance ou la compréhension d’images ou de vidéos utilisant la reconnaissance de formes ou l’apprentissage automatique utilisant la classification, p. ex. des objets vidéo
A battery cell tab defect detection method and a tab defect detection device, relating to the field of batteries. The tab defect detection method comprises: obtaining a first image of a first side of a tab stack of the battery cell, and a second image of a second side opposite the first side, the first and second sides being two faces parallel to a stacking direction of the tab stack and extending along a height direction of the tab; obtaining a first detection result based on the first image, and a second detection result based on the second image, the first and second detection results indicating: whether a tab in the tab stack has a first type defect, and a position of the first type defect, the first type defect comprising a tab line abnormality, and the position of the first type defect indicating the relative position of the first type defect on the height of the tab; and, based on the first and the second detection result, determining whether or not the tab stack has a defect in a fold to a membrane region. Said method can more accurately detect a tab folding defect, so as to determine whether or not a battery cell meets requirements.
The present application belongs to the technical field of batteries. Provided are a control system and method for battery cell welding using an adapter piece. The control system comprises: a first feeding apparatus, which is used for conveying a first top cover to a first pick-up position; a second feeding apparatus, which is used for conveying a second top cover to the first pick-up position during the process of the first feeding apparatus returning to a feeding position; a third feeding apparatus, which is used for conveying a first battery cell and a second battery cell to a second pick-up position; a conveying apparatus, which is used for conveying the first top cover, the second top cover, the first battery cell and the second battery cell to a welding apparatus; and the welding apparatus, which is used for welding the first top cover to the first battery cell and welding the second top cover to the second battery cell. In the present application, the control system realizes uninterrupted continuous feeding by means of two groups of feeding apparatuses, thereby shortening the waiting time for the feeding of top covers, and increasing the efficiency of a production line.
B23K 37/00 - Dispositifs ou procédés auxiliaires non spécialement adaptés à un procédé couvert par un seul des autres groupes principaux de la présente sous-classe
Provided in the present application are a camera installation deviation determination method and a visual-inspection compensation method. A camera is used for capturing an image of an object to be inspected, and when there is a deviation in the installation of the camera, the deviation may be finally reflected in the captured image. In order to effectively determine the installation deviation of the camera with respect to said object, the camera installation deviation determination method comprises: fixing a calibration member to said object, wherein the calibration member comprises a base part and a protruding part which protrudes from the base part, the base part has a calibration plane adjacent to the root of the protruding part, and the calibration plane has a first width; using the camera to capture an image of the calibration member; determining a second width of the part of the calibration plane of the base part that is not blocked by the protruding part in the image of the calibration member; and on the basis of the first width, the second width and the height of the protruding part protruding from the base part, determining the installation deviation of the camera with respect to said object.
An electrode manufacturing method, a battery and an electric device. The electrode manufacturing method comprises the following steps: providing slurry, wherein the slurry is mixed with a pore-forming agent; applying the slurry onto a current collector so as to form an active substance layer on the current collector; and electrifying the active substance layer, so that the pore-forming agent in the active substance layer is subjected to an electrochemical reaction to form pores. Before the step of applying the slurry onto the current collector, the method further comprises the step: providing a roller, wherein the roller is used for coating and traveling of the current collector, conductive pieces are arranged on the surface of the roller, and the conductive pieces are used for being electrically connected to the current collector. The step of electrifying the active substance layer comprises electrifying the current collector with the conductive pieces. The technical solution can improve the pore forming efficiency of an electrode, so that when the electrode is applied to a battery, the battery can have relatively high manufacturing efficiency.
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
The present application belongs to the technical field of batteries. Provided is a filter. The filter comprises: a housing, which is provided with a discharge port at the bottom; and a filtering assembly, which is located inside the housing and is connected to the housing, and comprises at least one filter element, wherein each of the at least one filter element is provided with a connection port arranged close to the discharge port, and the at least one filter element discharges filtered liquids from the discharge port by means of respective connection ports.
B01D 29/54 - Filtres à éléments filtrants stationnaires pendant la filtration, p. ex. filtres à aspiration ou à pression, non couverts par les groupes Leurs éléments filtrants à plusieurs éléments filtrants caractérisés par leur agencement relatif montés en parallèle disposés de façon concentrique ou coaxiale
B01D 29/94 - Filtres à éléments filtrants stationnaires pendant la filtration, p. ex. filtres à aspiration ou à pression, non couverts par les groupes Leurs éléments filtrants comportant des dispositifs d'alimentation ou d'évacuation d'évacuation du gâteau de filtration, p. ex. goulottes
B01D 29/96 - Filtres à éléments filtrants stationnaires pendant la filtration, p. ex. filtres à aspiration ou à pression, non couverts par les groupes Leurs éléments filtrants dans lesquels les éléments filtrants sont déplacés entre les opérations de filtrationDispositions particulières pour enlever ou remplacer les éléments filtrantsSystèmes de transport pour filtres
A battery (10) and an electric device. The battery (10) comprises: a case; at least one group of battery cells (11), each group of battery cells (11) comprising a plurality of battery cells (11) arranged in a first direction; and a pressing strip (12), wherein a channel for accommodating a liquid is provided in the pressing strip (12), and the pressing strip (12) extends in a first direction and is connected to the plurality of battery cells (11).
H01M 50/242 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par les propriétés physiques des boîtiers ou des bâtis, p. ex. dimensions adaptés pour protéger les batteries contre les vibrations, les collisions ou le gonflement
H01M 10/6556 - Composants solides comprenant des canaux d'écoulement ou des tubes pour un échange de chaleur
A62C 3/16 - Prévention, limitation ou extinction des incendies spécialement adaptées pour des objets ou des endroits particuliers dans les installations électriques, p. ex. chemins de câbles
40.
HEAT EXCHANGE DEVICE, HEAT EXCHANGE SYSTEM, BATTERY AND ELECTRICAL DEVICE
A heat exchange device (13), a heat exchange system, a battery (10) and an electrical device, which belong to the technical field of batteries. The heat exchange device (13) is applied to the battery (10). The heat exchange device (13) comprises: a heat exchange body provided with a first heat exchange flow channel (1322) and a second heat exchange flow channel (1332); and an expansion valve (134), wherein an inlet end of the expansion valve (134) is connected to an outlet end of the first heat exchange flow channel (1322), and an outlet end of the expansion valve (134) is connected to an inlet end of the second heat exchange flow channel (1332). The second heat exchange flow channel (1332) comprises an upstream flow channel and a downstream flow channel which are connected in sequence, wherein the upstream flow channel is connected to the outlet end of the expansion valve (134), the upstream flow channel is configured to perform heat exchange with a battery cell (12), and the downstream flow channel is configured to perform heat exchange with the first heat exchange flow channel (1322).
An end cover assembly (100), a battery (10), and an electric device (1). The end cover assembly (100) comprises an end cover (110) and a protective patch (120); the end cover (110) has a first surface (111); first protrusions (113) are arranged on the first surface (111); the protective patch (120) is connected to the first surface (111); the protective patch (120) has a second surface (121) and a third surface (122) arranged opposite to each other; first recesses (123) are formed in the second surface (121); the first protrusions (113) are located in the first recesses (123); a second protrusion (124) is provided on the third surface (122); the second protrusion (124) has case connecting regions (125); and the case connecting regions (125) are used for being connected to a battery case (12). The end cover assembly (100) improves the connection performance between battery cells (11) and the battery case (12), so that the displacement of the end cover (110) structure relative to the battery case (12) can be reduced when the battery (10) expands and deforms, thereby enhancing the electrical connection stability between adjacent battery cells (11).
Disclosed in the present application are a winding needle (10), a winding device (1000) and a battery processing system. The winding needle comprises: an inner needle (11); at least two outer needles (12), which surround the inner needle along the circumference of the inner needle, and are movably arranged on the circumferential side of the inner needle in the radial direction of the inner needle; and a first structural member (13), which abuts against the outer needles, and can move relative to the outer needles in the axial direction of the inner needle to push the outer needles away from the inner needle in the radial direction of the inner needle. In the winding needle of the present application, the first structural member pushes the outer needles away from the inner needle in the radial direction of the inner needle, thereby achieving the effect of expanding the outer diameter of the winding needle; and the first structural member can be disengaged from the outer needles, and then an electrode assembly can apply pressure to the winding needle to enable the outer needles to move close to the inner needle in the radial direction of the inner needle, thereby achieving the effect of reducing the outer diameter of the winding needle. In this way, the outer diameter of the winding needle can be increased or decreased, so that the outer diameter of the winding needle can be adjusted during the winding process of the electrode assembly, thereby reducing the tab misalignment.
H01M 10/0587 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure enroulés, c.-à-d. des électrodes positives enroulées, des électrodes négatives enroulées et des séparateurs enroulés
43.
POSITIVE ELECTRODE ACTIVE MATERIAL, PREPARATION METHOD THEREFOR, POSITIVE POLE PIECE, SECONDARY BATTERY AND ELECTRICAL APPARATUS
A positive electrode active material, a preparation method therefor, a positive pole piece, a secondary battery and an electrical apparatus. In particular, the positive electrode active material comprises first lithium iron phosphate particles and second lithium iron phosphate particles, wherein the primary average particle size of the first lithium iron phosphate particles is 500-3000 nm, and the primary average particle size of the second lithium iron phosphate particles is 120-600 nm.
H01M 4/58 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs de composés inorganiques autres que les oxydes ou les hydroxydes, p. ex. sulfures, séléniures, tellurures, halogénures ou LiCoFyEmploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs de structures polyanioniques, p. ex. phosphates, silicates ou borates
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
44.
WELDING APPARATUS, BATTERY PRODUCTION LINE, AND CONTROL METHOD
A welding apparatus (100), comprising: a pressing member (3). The pressing member comprises at least two sub-pressing members (31), and the sub-pressing members (31) are arranged in a first direction and each are provided with pressing heads (32), respectively; and each sub-pressing member (31) is respectively connected to a corresponding pressing mechanism (1), and is driven by the corresponding pressing mechanism (1) to press down, so that the pressing heads (32) abut against structures to be welded of a battery. According to the welding apparatus, pressure is applied to the plurality of structures to be welded in the battery, preventing the problem of inadequate pressing and fitting caused by height deviations of the structures to be welded, and improving the welding quality of the battery. Also provided are a battery production line and a control method for the welding apparatus.
B23K 37/04 - Dispositifs ou procédés auxiliaires non spécialement adaptés à un procédé couvert par un seul des autres groupes principaux de la présente sous-classe pour maintenir ou mettre en position les pièces
45.
ELECTRODE PLATE, COMPOSITE ADDITIVE AND PREPARATION METHOD THEREFOR, BATTERY, AND ELECTRICAL APPARATUS
An electrode plate, a composite additive and a preparation method therefor, a battery, and an electrical apparatus. The electrode plate comprises a current collector and a functional film layer disposed on at least one side of the current collector, components of the functional film layer comprising the composite additive. The composite additive comprises a porous material, and an additive disposed in a pore structure of the porous material. Using the described electrode plate to prepare a battery can improve the cycle stability of the battery.
An electrode sheet and a preparation method therefor, and a battery and an electric apparatus. The electrode sheet comprises a current collector, and an active layer and a composite film layer, which are sequentially arranged on at least one side of the current collector, wherein the active layer comprises an active material and a functional additive, and the composite film layer comprises a polymer and a porous material. When the electrode sheet is used for preparing a battery, the cycling stability of the battery can be improved.
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
47.
POSITIVE ELECTRODE ACTIVE MATERIAL AND PREPARATION METHOD THEREOF, POSITIVE POLE PIECE, SECONDARY BATTERY AND ELECTRICAL DEVICE
A positive electrode active material, the positive electrode active material comprises lithium iron phosphate particles and lithium nickel cobalt manganate particles, wherein the primary average particle size of the lithium iron phosphate particles is 500-3000 nm, the specific surface area BET of the lithium iron phosphate particles is 3m 2/g-8m 2/g, and the specific surface area BET of the lithium nickel cobalt manganate particles is 0.4m 2/g-2.0m 2/g. The positive electrode active material has good processability, and also has good gram capacity.
H01M 4/58 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs de composés inorganiques autres que les oxydes ou les hydroxydes, p. ex. sulfures, séléniures, tellurures, halogénures ou LiCoFyEmploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs de structures polyanioniques, p. ex. phosphates, silicates ou borates
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
H01M 4/131 - Électrodes à base d'oxydes ou d'hydroxydes mixtes, ou de mélanges d'oxydes ou d'hydroxydes, p. ex. LiCoOx
48.
POSITIVE POLE PIECE, PREPARATION METHOD, SECONDARY BATTERY AND ELECTRICAL APPARATUS
A positive pole piece and a preparation method therefor, and a secondary battery. The positive pole piece comprises a current collector and a positive electrode active layer. The positive electrode active layer is arranged on at least one surface of the current collector. The positive electrode active layer comprises a first positive electrode active layer at least formed on the current collector, and a second positive electrode active layer formed on the side of the first positive electrode active layer away from the current collector. The first positive electrode active layer comprises lithium iron phosphate particles, and the second positive electrode active layer comprises lithium nickel cobalt manganate particles; or, the first positive electrode active layer comprises lithium nickel cobalt manganate particles, and the second positive electrode active layer comprises lithium iron phosphate particles. The primary average particle size of the lithium iron phosphate particles is 500-3000 nm, and the specific surface area BET of the lithium iron phosphate particles is 3m 2/g-8m 2/g. The positive pole piece can reduce gas production when coating the upper and lower layers of the lithium iron phosphate particles and the lithium nickel cobalt manganate particles, and also has good gram capacity.
Disclosed in the present application are a weld seam height measurement method and apparatus, and an electronic device and a readable storage medium. The weld seam height measurement method comprises: acquiring a target depth image of a weld seam in a battery cell, wherein the battery cell comprises a top cover and a casing that are adjacent, and the weld seam is located between the top cover and the casing; on the basis of the target depth image, determining position information of the casing corresponding to a target plane in a preset three-dimensional coordinate system; and on the basis of position information of each first target pixel point in the target depth image in the preset three-dimensional coordinate system and the position information of the target plane, determining the height of the weld seam, wherein the first target pixel points are pixel points corresponding to a weld seam area in the target depth image.
5050505050; and the graphitization degree of the first negative electrode active material is greater than that of the second negative electrode active material. The design is beneficial to improving the fast charging performance and energy density of the secondary battery.
H01M 4/587 - Matériau carboné, p. ex. composés au graphite d'intercalation ou CFx pour insérer ou intercaler des métaux légers
H01M 4/133 - Électrodes à base de matériau carboné, p. ex. composés d'intercalation du graphite ou CFx
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
A battery cell (12), a battery (100), and an electrical device. The battery cell (12) comprises a casing (121), pressure relief mechanisms (123), and an electrode assembly (122). The casing (121) has a first end wall (1211) and a side wall (1212), and the side wall (1212) surrounds the first end wall (1211); the first end wall (1211) comprises a body (12111) and protruding portions (12112), and the protruding portions (12112) protrude from the inner surface of the body (12111); the pressure relief mechanisms (123) are arranged on the body (12111); the electrode assembly (122) is accommodated in the casing (121); the electrode assembly (122) comprises a main body (1221) and a first tab (1222), and the first tab (1222) is arranged on one end of the main body (1221); a first gap (124) is formed between the outer peripheral surface of the main body (1221) and the inner surface of the side wall (1212); the first current collector (125) is located between the first end wall (1211) and the electrode assembly (122), the protruding portions (12112) are connected to the first current collector (125), a second gap (126) is formed between the body (12111) and the first current collector (125) in the thickness direction of the first end wall (1211), and the first gap (124) is in communication with the second gap (126). The pressure relief mechanisms (123) can maintain an unobstructed connection with the first gap (124), such that when the battery cell (12) undergoes thermal runaway, the gas inside the battery cell (12) can promptly reach the pressure relief mechanisms (123) and be discharged, thereby improving the reliability of the battery cell (12).
H01M 50/367 - Passages internes d’évacuation des gaz dans le couvercle ou le boîtier de la batterieSystèmes d’évent à double couvercle
52.
SOLUTION FOR PREPARING ELECTROLYTE AND PREPARATION METHOD THEREFOR, ELECTROLYTE AND PREPARATION METHOD THEREFOR, LITHIUM-ION BATTERY, AND ELECTRIC DEVICE
Provided are a solution for preparing an electrolyte and a preparation method therefor, an electrolyte and a preparation method therefor, a lithium-ion battery, and an electric device. The solution comprises a non-aqueous solvent and magnesium nitrate, wherein the non-aqueous solvent comprises an ester solvent; and the water content a of the solution satisfies: a<100 ppm. The solution contains magnesium nitrate dissolved therein and has an extremely low water content. An electrolyte prepared from the solution can contain magnesium nitrate and has the advantages of a low water content and a low probability of deterioration; and when being used in a lithium-ion battery, the electrolyte is conducive to improving the cycle life of the lithium-ion battery.
H01M 10/0567 - Matériaux liquides caracterisés par les additifs
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
The present application is applicable to the technical field of batteries, and provides a battery cell, a battery, and an electrical apparatus. The battery cell comprises a positive electrode sheet, a negative electrode sheet, and a separator; the positive electrode sheet, the negative electrode sheet, and the separator are arranged layer by layer on the basis of a preset sequence and are wound to form a wound body; the positive electrode sheet, the negative electrode sheet, and the separator respectively comprises a plurality of straight portions and a plurality of bent portions that are alternately connected; at least one surface of at least one bent portion is coated with a non-continuously distributed coating. According to the battery cell, the battery, and the electrical apparatus provided by the present application, the risk of phenomena such as electrode sheet breakage and lithium precipitation at a corner can be reduced to a certain extent.
H01M 4/13 - Électrodes pour accumulateurs à électrolyte non aqueux, p. ex. pour accumulateurs au lithiumLeurs procédés de fabrication
H01M 10/0587 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure enroulés, c.-à-d. des électrodes positives enroulées, des électrodes négatives enroulées et des séparateurs enroulés
54.
POLYMER, METHOD FOR PREPARING POLYMER, SEPARATOR, BATTERY, AND ELECTRIC DEVICE
The present disclosure provides a polymer, a method for preparing the polymer, a separator, a battery, and an electric device. The polymer comprises an acrylate copolymer, the monomer of the acrylate copolymer at least comprises a first monomer, and the first monomer comprises a fluorine-substituted acrylate monomer.
C08F 220/18 - Esters des alcools ou des phénols monohydriques des phénols ou des alcools contenant plusieurs atomes de carbone avec l'acide acrylique ou l'acide méthacrylique
Provided are a coating die and a coating device. The coating die comprises a die body (10) and a pressure regulating component (20). The die body is provided with a feed port (K1) and a discharge port (K2) which are arranged opposite each other, and comprises a first accommodating cavity (11) and a second accommodating cavity (12) which are in communication with each other, the first accommodating cavity being located on the side of the second accommodating cavity close to the feed port in a first direction (X) and being in communication with the feed port, and the second accommodating cavity being in communication with the discharge port. The pressure regulating component is accommodated in the second accommodating cavity, and comprises a plurality of pressure regulating plates (21) arranged at intervals in a second direction (Y) to form pressure control flow channels (22). The coating die and the coating device can improve the slurry coating uniformity during a coating process.
B05C 5/02 - Appareillages dans lesquels un liquide ou autre matériau fluide est projeté, versé ou répandu sur la surface de l'ouvrage à partir d'un dispositif de sortie en contact, ou presque en contact, avec l'ouvrage
56.
DC-DC CONVERTER, CONTROL METHOD AND APPARATUS THEREFOR, AND STORAGE MEDIUM
The present application relates to the field of voltage conversion control, and in particular to a DC-DC converter, a control method and apparatus therefor, and a storage medium. The method comprises: acquiring a first side parameter and a second side parameter of a DC-DC converter; searching for a target duty ratio of the DC-DC converter on the basis of a correspondence between the first side parameter, the second side parameter and a duty ratio; and determining a feedforward control signal of the DC-DC converter on the basis of the target duty ratio, and controlling the DC-DC converter on the basis of the feedforward control signal and a feedback control signal. By means of the method, the feedforward control signal can be quickly determined on the basis of the correspondence, thereby facilitating increasement of the response speed of a system and facilitating reduction of a PI parameter, thus reducing oscillation and improving the system stability.
H02M 3/156 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p. ex. régulateurs à commutation
H02M 1/32 - Moyens pour protéger les convertisseurs autrement que par mise hors circuit automatique
H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
57.
SECONDARY BATTERY, PREPARATION METHOD THEREFOR, AND ELECTRICAL APPARATUS
A secondary battery, comprising: a positive electrode piece, a negative electrode piece, a separator arranged between the positive electrode piece and the negative electrode piece, and an electrolyte comprising an electrolyte salt and a solvent; the positive electrode piece comprises a positive current collector and a positive film layer arranged on at least one surface of the positive current collector; the positive electrode film layer comprises first particles, the first particles comprising first manganese iron phosphate particles, the primary average particle size s1 of the first particles being 120-600 nm, and the manganese dissolution amount of the secondary battery being ≤50 ppm.
The present application relates to a pressing mechanism, a composite current collector preparation apparatus and method, and a battery production system. Air suction holes are formed on a roller surface of a supporting roller and/or a pressing roller. When the pressing roller and the supporting roller cooperatively press a conductive layer and a substrate layer which are bonded to each other, air can be evacuated from the surface of the conductive layer and/or the substrate layer by means of the air suction holes, causing the conductive layer and the substrate layer to be pressed and suctioned simultaneously, thereby accelerating the removal of gas from between the conductive layer and the substrate layer, reducing bubbles between the conductive layer and the substrate layer, improving a binding force between the conductive layer and the substrate layer, reducing a risk of stripping of the conductive layer, and improving battery performance.
The present application is applicable to the technical field of battery production devices, and provides a winding device and a battery manufacturing device. The winding device (100) comprises: a compounding mechanism (10) used for unwinding a first electrode sheet (210), a first separator (220), and a second electrode sheet (230), and pressing the first electrode sheet (210), the first separator (220), and the second electrode sheet (230) to form a compounding sheet (250); a separator unwinding mechanism (20) used for unwinding a second separator (240); and a winding mechanism (30) provided on a discharge side of the compounding mechanism (10), the winding mechanism (30) being used for winding the compounding sheet (250) and the second separator (240) to form an electrode assembly (200). The winding device provided by the embodiments of the present application has reasonable layout, and the problem of the crowded space above the winding mechanism is solved.
H01M 10/0587 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure enroulés, c.-à-d. des électrodes positives enroulées, des électrodes négatives enroulées et des séparateurs enroulés
Embodiments of the present application provide a thermal management assembly, a battery, an electric device, and an energy storage device, capable of improving the use performance of the thermal management assembly. The thermal management assembly is used for adjusting the temperature of a battery cell. The thermal management assembly comprises: a first plate and a second plate which are oppositely arranged; and a first pipe, the first pipe being arranged between the first plate and the second plate, wherein the shape of the section, perpendicular to the extending direction of the first pipe, of the first pipe comprises an arc shape.
H01M 50/242 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par les propriétés physiques des boîtiers ou des bâtis, p. ex. dimensions adaptés pour protéger les batteries contre les vibrations, les collisions ou le gonflement
H01M 50/289 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par des éléments d’espacement ou des moyens de positionnement dans les racks, les cadres ou les blocs
61.
CURING DEVICE, CURRENT COLLECTOR PROCESSING APPARATUS AND BATTERY PRODUCTION SYSTEM
The present application relates to a curing device, a current collector processing apparatus and a battery production system. The curing device comprises a baking oven, a compression mechanism and a negative pressure mechanism. The baking oven is used for baking a composite current collector; the compression mechanism is located in the baking oven, and is used for compressing the composite current collector in the direction of thickness thereof; and the negative pressure mechanism is used for creating a negative-pressure environment inside the baking oven. In the curing device, the compression mechanism is arranged in the baking oven, and the negative pressure mechanism is used to vacuumize the baking oven, such that the composite current collector is also synchronously subjected to a negative-pressure action inside the baking oven while being compressed. In this way, during a baking and curing process, residual gas in the composite current collector can be more easily released under the synchronous action of compression and negative pressure, such that the internal porosity is reduced, the internal structure of the composite current collector is more compact, and the binding force of the internal structure is improved, thus facilitating improvement in the use performance of a battery.
B32B 37/06 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par le procédé de chauffage
B32B 37/10 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par la technique de pressage, p. ex. faisant usage de l'action directe du vide ou d'un fluide sous pression
B32B 37/00 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons
B32B 37/12 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par l'usage d'adhésifs
A composite current collector (100), an electrode sheet, an electrode assembly (413), a secondary battery (410) and an electric apparatus. Exhaust units (31) penetrating through a conductive layer (30) are provided on the conductive layer (30), so that during preparation, the conductive layer (30) is bonded to a substrate (10), and the conductive layer (30) is pressed. Since the exhaust units (31) are provided on the conductive layer (30), residual gas in a glue will be exhausted from the exhaust units (31) during pressing, so that the conductive layer (30) and the substrate (10) are fully adhered to each other, thereby improving the bonding strength between the conductive layer (30) and the substrate (10), and effectively reducing the falling risk of the conductive layer (30). Moreover, during pressing, part of the glue permeates into the exhaust units (31), so as to enhance the adhesion strength, so that the conductive layer (30) and the substrate (10) are tightly bonded, thereby improving the stability of the structure of the composite current collector (100).
Large-particle, low-specific-surface-area and high-dynamics lithium iron phosphate particles. The primary average particle size of the lithium iron phosphate particles is 500-3000 nm, and the BET specific surface area thereof is 3 m2/g to 8 m2/g. By means of calculation on the basis of the total weight of the lithium iron phosphate particles, the carbon content of the lithium iron phosphate particles is Cx weight%, where 0.8≤Cx≤2.0.
H01M 4/58 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs de composés inorganiques autres que les oxydes ou les hydroxydes, p. ex. sulfures, séléniures, tellurures, halogénures ou LiCoFyEmploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs de structures polyanioniques, p. ex. phosphates, silicates ou borates
A positive electrode piece, comprising a current collector and a positive electrode active layer, the positive electrode active layer being arranged on at least one surface of the current collector; the positive electrode active layer comprises a first active layer directly coated on the current collector and a second active layer coated on the surface of the side of the first active layer away from the current collector; the first active layer comprises first lithium iron phosphate salt particles and/or first manganese iron phosphate salt particles, the second active layer comprises second lithium iron phosphate salt particles, the primary average particle diameter of the first lithium iron phosphate salt particles and/or the first manganese iron phosphate salt particles is 150 nm to 480 nm, and the primary average particle diameter of the second lithium iron phosphate particles is 500-3000 nm.
H01M 4/136 - Électrodes à base de composés inorganiques autres que les oxydes ou les hydroxydes, p. ex. sulfures, séléniures, tellurures, halogénures ou LiCoFy
H01M 4/58 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs de composés inorganiques autres que les oxydes ou les hydroxydes, p. ex. sulfures, séléniures, tellurures, halogénures ou LiCoFyEmploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs de structures polyanioniques, p. ex. phosphates, silicates ou borates
H01M 4/1397 - Procédés de fabrication d’électrodes à base de composés inorganiques autres que les oxydes ou les hydroxydes, p. ex. sulfures, séléniures, tellurures, halogénures ou LiCoFy
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
65.
POSITIVE ELECTRODE PLATE, SECONDARY BATTERY, AND ELECTRICAL APPARATUS
A positive electrode plate, comprising a current collector and a positive electrode active layer, the positive electrode active layer being arranged on at least one surface of the current collector, and the positive electrode active layer comprising a first active layer directly coated on the current collector and a second active layer coated on the surface of the side of the first active layer furthest from the current collector side, wherein the first active layer comprises first lithium iron phosphate particles and the thickness of the first active layer is in the range of 15-60 μm, the second active layer comprises second lithium iron phosphate particles and/or second manganese iron phosphate particles and the thickness of the second active layer is in the range from 60-130 μm, the primary average particle size of the first lithium iron phosphate particles is 500-3000 nm, and that of the second lithium iron phosphate particles and/or the second manganese iron phosphate particles is 150-480 nm.
H01M 4/136 - Électrodes à base de composés inorganiques autres que les oxydes ou les hydroxydes, p. ex. sulfures, séléniures, tellurures, halogénures ou LiCoFy
66.
POSITIVE ELECTRODE SHEET AND PREPARATION METHOD THEREFOR, BINDER, BATTERY, AND ELECTRIC DEVICE
The present application relates to the technical field of batteries, and provides a positive electrode sheet and a preparation method therefor, a binder, a battery, and an electric device. The positive electrode sheet comprises a positive electrode current collector and a positive electrode film layer located on at least one surface of the positive electrode current collector, the positive electrode film layer comprises a binder, and the binder comprises a copolymer.
C09J 151/00 - Adhésifs à base de polymères greffés dans lesquels le composant greffé est obtenu par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carboneAdhésifs à base de dérivés de tels polymères
67.
POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, POSITIVE ELECTRODE SHEET, BATTERY AND ELECTRIC DEVICE
HUNAN YUNENG NEW ENERGY BATTERY MATERIAL LTD. (Chine)
Inventeur(s)
Bie, Changfeng
Chen, Tao
Li, Xiaojing
Leng, Xue
Liu, Hongyu
He, Siyuan
Ni, Huan
Wang, Yuelin
Abrégé
Provided in the present application are a positive electrode material and a preparation method therefor, a positive electrode sheet, a battery and an electric device. The positive electrode material of the present application comprises an inner core and a coating layer that coats the inner core, wherein the inner core comprises lithium iron phosphate or M-element-containing lithium iron phosphate, and the coating layer comprises carbon and an optional M element. The positive electrode material satisfies: the powder resistivity at 8 MPa is less than or equal to 20 Ω.cm; and the BET specific surface area at a liquid nitrogen temperature is 6-15.2 m2/g. The positive electrode material of the present application has few side reactions, and improves the cycle performance of a battery.
A method for controlling gluing includes: allowing a conveying apparatus to move a to-be-glued workpiece to a gluing workstation; determining a gluing mode of the to-be-glued workpiece based on a user instruction received through a human-machine interface; fixing the to-be-glued workpiece into a position; invoking a gluing solution for the to-be-glued workpiece; instructing a gluing robot to perform a gluing operation on the workpiece based on the gluing solution; and uploading gluing data to a device manufacturing execution system server. A gluing system includes a control device for controlling a gluing workstation for performing a gluing operation, and a gluing robot for performing the gluing operation, where the control device at the gluing workstation is configured to: invoke a gluing solution for the to-be-glued workpiece; and instruct the gluing robot to perform the gluing operation on the workpiece based on the gluing solution.
A voltage detection device. The voltage detection device comprises a rod, a contact member and a probe. The contact member is rotatably connected to an axial end of the rod and is configured to abut against an electric motor shaft, and the probe is electrically connected to the contact member.
H02K 11/26 - Dispositifs de détection de la tension ou actionnés par des valeurs de cette variable, p. ex. dispositifs de protection contre les excès de tension
Disclosed in the present application are a battery and an electric device. The battery comprises a battery cell and at least one cooling component. The battery cell comprises a casing, at least one electrode assembly and at least one buffer member, wherein the electrode assembly and the buffer member are arranged in the casing; the buffer member is arranged on at least part of the surface of the electrode assembly and/or inside the electrode assembly; and the at least one electrode assembly and the at least one buffer member are stacked in a first direction. The cooling component is arranged on at least one side of the battery cell in the first direction.
H01M 10/0587 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure enroulés, c.-à-d. des électrodes positives enroulées, des électrodes négatives enroulées et des séparateurs enroulés
H01M 50/489 - Séparateurs, membranes, diaphragmes ou éléments d’espacement dans les cellules caractérisés par leurs propriétés physiques, p. ex. degré de gonflement, hydrophilicité ou propriétés pour court-circuiter
H01M 10/613 - Refroidissement ou maintien du froid
A battery cell (20), a battery (100) and an electric device, belonging to the technical field of batteries. The battery cell (20) comprises a casing (21) and an end cap (22). An accommodating cavity (211) is formed inside the casing (21), at least one end of the accommodating cavity (211) in a first direction (X) having an opening (211) formed thereon, and the accommodating cavity (211) being used for accommodating an electrode assembly (23). The end cap (22) comprises a first cap body (221) and a second cap body (222) stacked in the first direction (X), wherein the first cap body (221) is connected to the casing (21) thus sealing the opening (212), and the strength of the second cap body (222) is greater than the strength of the first cap body (221). By setting the strength of the second cap body (222) to be greater than the strength of the first cap body (221), the end cap (22) of said structure is provided with the second cap body (222) having a higher strength on one side of the first cap body (221), enabling the overall structural strength of the end cap (22) to be improved; thus, while remaining the same structural strength of the end cap (22), the mutual connection between the end cap (22) and the casing (21) can be realized by means of the first cap body (221), and the overall thickness of the first cap body (221) and second cap body (222) of the end cap (22) stacked in the first direction (X) can also be optimized.
A battery (1001) and an electrical apparatus. The battery (1001) comprises: a case (200), comprising first borders (2021) located at both ends in the width direction, each first border (2021) extending in the length direction of the case (200); and a plurality of cells (100), mounted inside the case (200), the length direction of each cell (100) being parallel to the length direction of the case (200), the cells (100) adjacent to each first border (2021) abutting against the first border (2021), and each first border (2021) being provided with a mounting beam (23). The length direction of the cells (100) is parallel to the length direction of the case (200), each first border (2021) abuts against the adjacent cells (100), and the first borders (2021) are located at the ends of the case (200) in the width direction, such that each first border (2021) abuts against large surfaces of the adjacent cells (100). Moreover, the first borders (2021) being provided with the mounting beams (23) facilitates mounting and use of the battery (1001), and the mounting beams (23) can provide constraining forces, so as to resist the expansion deformation of the cells (100).
A battery and an electrical device. The battery comprises a case (10), a connector (30) and at least one battery cell (20), wherein the at least one battery cell (20) is located in the case (10); and the connector (30) comprises a first connecting portion (31) and a second connecting portion (32) connected to each other, the first connecting portion (31) being fixedly connected to the at least one battery cell (20), and the second connecting portion (32) being fixedly connected to the case (10), so that the connector (30) can stably connect the battery cell (20) and the case (10) together, the connection reliability of the battery cell (20) and the case (10) is improved, and the structural strength and rigidity of the battery are improved, thereby improving the use reliability of the battery, and prolonging the service life of the battery.
H01M 50/503 - Interconnecteurs pour connecter les bornes des batteries adjacentesInterconnecteurs pour connecter les cellules en dehors d'un boîtier de batterie caractérisées par la forme des interconnecteurs
A battery and an electric device. A battery (1100) comprises a box body (10), insulating members (30), and at least one battery cell (20). The box body (10) comprises first side beams (121) and second side beams (122), and the first side beams (121) and the second side beams (122) are connected and define an accommodating space (101). The at least one battery cell (20) is located in the accommodating space (101), battery cells adjacent to the first side beams (121) are first battery cells (201), the maximum area surface of each first battery cell (201) is a first surface (21), and the first surface (21) of the first battery cell (201) faces the corresponding first side beam (121). The insulating members (30) are located in the accommodating space (101), and each insulating member (30) is provided between the first battery cells (201) and the corresponding first side beam (121), so that when the first side beam (121) is impacted, the first surfaces (21) of the first battery cells (201) bear impact, reducing the impact deformation of the first battery cells (201), reducing the short-circuit risk of the first battery cells (201), thereby improving the use reliability of the battery (1100).
H01M 50/242 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par les propriétés physiques des boîtiers ou des bâtis, p. ex. dimensions adaptés pour protéger les batteries contre les vibrations, les collisions ou le gonflement
H01M 50/204 - Bâtis, modules ou blocs de multiples batteries ou de multiples cellules
H01M 50/209 - Bâtis, modules ou blocs de multiples batteries ou de multiples cellules caractérisés par leur forme adaptés aux cellules prismatiques ou rectangulaires
H01M 50/244 - Boîtiers secondairesBâtisDispositifs de suspensionDispositifs de manutentionSupports caractérisés par leur procédé de montage
H01M 50/258 - Batteries modulairesBoîtiers pourvus de moyens d’assemblage
H01M 50/249 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports spécialement adaptés aux aéronefs ou aux véhicules, p. ex. aux automobiles ou aux trains
H01M 50/264 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports avec des moyens de fixation, p. ex. des serrures pour des cellules ou des batteries, p. ex. cadres périphériques, courroies ou tiges
H01M 50/293 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par des éléments d’espacement ou des moyens de positionnement dans les racks, les cadres ou les blocs caractérisés par le matériau
The present application discloses a battery and an electric device. The battery comprises a case, a heat exchange assembly, and at least one battery cell; the case comprises a plurality of first side beams, and the plurality of first side beams are connected to define a first accommodating cavity; the at least one battery cell is located in the first accommodating cavity; the heat exchange assembly is located in the first accommodating cavity, and comprises at least one heat exchange piece used for exchanging heat with the battery cell; and an accommodating slot is formed in at least one first side beam, and the at least one heat exchange piece is at least partially accommodated in the accommodating slot. In this way, the internal space of the case is saved, the space utilization rate of the battery is improved, and the structural compactness of the battery is improved, thereby improving the volumetric energy density of the battery.
A battery cell (20), a battery, and an electric device. The battery cell (20) comprises a casing (21), electrode assemblies (22), first insulating members (23), and second insulating members (24); the casing (21) has a first wall portion (213); the electrode assemblies (22) are accommodated in the casing (21); the electrode assemblies (22) comprise a first electrode lead-out portion (222) and main body portions (221); the first electrode lead-out portion (222) is provided at the end of the main body portions (221) facing the first wall portion (213) in a first direction; in the first direction, the first insulating members (23) are provided on the surface of the first wall portion (213) facing the electrode assemblies (22), and are used for insulating the first electrode lead-out portion (222) from the first wall portion (213); and in the first direction, at least part of the second insulating members (24) is provided between the first electrode lead-out portion (222) and the first wall portion (213), the material damage temperature of the second insulating members (24) is greater than that of the first insulating members (23), and the second insulating members (24) can insulate the first electrode lead-out portion (222) from the first wall portion (213) when the first insulating members (23) have melted. When the first insulating members (23) have melted, the second insulating members (24) can still exert the insulation effect, thereby reducing the risk of short circuit and improving the reliability of the battery.
A battery (100) and an electrical apparatus, which are applicable to the technical field of batteries (100). The electrical apparatus comprises a battery (100), the battery (100) comprises a battery unit (10) and a case (20), and the battery unit (10) comprises at least one battery cell (1). The case (20) is provided with two first walls (21) opposite to each other in a first direction (Y), the two first walls (21) are connected to a first connecting member (22) used for being connected to an external device. In the first direction (Y), the battery unit (10) is arranged between the two first walls (21) and is limited by means of the first walls (21). When the first connecting member (22) is connected to the external device, the external device can constrain the relative positions of the two first walls (21) in the first direction (Y), so that the two first walls (21) can constrain the battery unit in the first direction (Y), to effectively resist the expansion of the battery cell (1) while reducing or eliminating the need for expansion beams and similar structures, thereby lowering the cost of the battery (100).
H01M 50/209 - Bâtis, modules ou blocs de multiples batteries ou de multiples cellules caractérisés par leur forme adaptés aux cellules prismatiques ou rectangulaires
78.
STACKING DEVICE, STACKING SYSTEM, AND STACKING METHOD
The present application provides a stacking device, a stacking system, and a stacking method. The stacking device comprises a separator unwinding mechanism and a stacking apparatus, and the separator unwinding mechanism is provided with an output part for outputting a separator. The stacking apparatus comprises a stacking platform for receiving the separator, the stacking platform has a first stacking position and a second stacking position in a first direction, the stacking platform is used for receiving a first electrode sheet at the first stacking position, and the stacking platform is used for receiving a second electrode sheet at the second stacking position. The polarities of the first electrode sheet and the second electrode sheet are opposite. The output part has a first output position and a second output position in the first direction, and the output part and the stacking platform can move in opposite directions. The output part is configured to switch between the second output position and the first output position when the stacking platform switches between the first stacking position and the second stacking position. The stacking device can adjust the relative position of the output part and the stacking platform more quickly, thereby reducing the movement time and stroke of the stacking platform, and improving the stacking efficiency.
H01M 10/0585 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure plats, c.-à-d. des électrodes positives plates, des électrodes négatives plates et des séparateurs plats
79.
COATING DIE, AND COATING DEVICE FOR BATTERY ELECTRODE SHEET
A coating die, and a coating device for a battery electrode sheet. The coating die comprises a first die (1) and a second die (2). The first die (1) comprises a first main body (11) and a first component (12), and the first component (12) is detachably connected to the first main body (11). The second die (2) and the first die (1) are arranged in a first direction (Z), a cavity (3) used for accommodating a slurry is formed between the second die (2) and the first main body (11), and a discharging port (4) communicated with the cavity (3) is formed between the first component (12) and the second die (2). When the first component is worn, the worn first component only needs to be detached and a new first component is mounted, so that the downtime of the coating die can be shortened, improving the coating efficiency, and reducing the production costs.
B05C 5/02 - Appareillages dans lesquels un liquide ou autre matériau fluide est projeté, versé ou répandu sur la surface de l'ouvrage à partir d'un dispositif de sortie en contact, ou presque en contact, avec l'ouvrage
A bus-bar assembly (10) inside a battery (100), used for achieving electrical connection of a plurality of battery cells (20), wherein the plurality of battery cells (20) and the bus-bar assembly (10) are accommodated in a case (30). The bus-bar assembly further comprises a heat absorption component (2); heat generated by the plurality of battery cells (20) can be transferred by means of a bus-bar component (1); the heat absorption component (2) is connected to the bus-bar component (1) to absorb the heat on the bus-bar component (1), so as to reduce the heat transferred from one battery cell (20) to another battery cell (20), thereby improving the reliability of the battery (100).
H01M 50/298 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par le câblage des blocs de batterie
H01M 50/503 - Interconnecteurs pour connecter les bornes des batteries adjacentesInterconnecteurs pour connecter les cellules en dehors d'un boîtier de batterie caractérisées par la forme des interconnecteurs
H01M 50/505 - Interconnecteurs pour connecter les bornes des batteries adjacentesInterconnecteurs pour connecter les cellules en dehors d'un boîtier de batterie comprenant une barre omnibus unique
H01M 10/613 - Refroidissement ou maintien du froid
H01M 10/6551 - Surfaces spécialement adaptées à la dissipation de la chaleur ou à la radiation, p. ex. nervures ou revêtements
H01M 10/6569 - Fluides qui subissent un changement ou une transition de phase liquide-gaz, p. ex. évaporation ou condensation
81.
HOUSING ASSEMBLY, BATTERY CELL, BATTERY, AND ELECTRICAL DEVICE
Disclosed are a housing assembly (21), a battery cell (20), a battery (100), and an electrical device. The housing assembly (21) comprises a housing (211) and a terminal (212), wherein a hole (211a) is provided in the housing (211); and the terminal (212) comprises a main body portion (201), a connecting portion (202), and a bent portion (203), the main body portion (201) being located inside the housing (211), the connecting portion (202) passing through the hole (211a) and connecting the main body portion (201) and the bent portion (203), the bent portion (203) being located outside the housing (211), the bent portion (203) having an end portion close to the connecting portion (202), and a recess (212a) being provided on the side of the end portion close to the housing (211).
The present application provides a battery airtightness testing system and method. The battery airtightness testing system comprises a first test module and at least two re-test modules. The first test module is configured to perform first airtightness testing on a plurality of incoming battery packs; each incoming battery pack comprises a plurality of batteries; and the battery packs tested by the first test module include a first compliant battery pack and a first non-compliant battery pack. The re-test module comprises a buffer platform, a re-test chamber, and a re-test manipulator; the buffer platform is configured to receive and store the first non-compliant battery pack; the re-test manipulator is configured to grab all batteries in the first non-compliant battery pack stored in the buffer platform into the re-test chamber; the re-test chamber is configured to perform independent second airtightness testing on each battery in the first non-compliant battery pack; and the batteries tested by the re-test chamber include a second compliant battery and a second non-compliant battery.
G01M 3/32 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation d'un fluide ou en faisant le vide par mesure du taux de perte ou de gain d'un fluide, p. ex. avec des dispositifs réagissant à la pression, avec des indicateurs de débit pour récipients, p. ex. radiateurs
Provided in the embodiments of the present application are a battery and an electric device. The battery comprises a battery cell group, a plurality of thermal management components, a first connecting pipe, and a first protective mechanism, wherein the battery cell group comprises a plurality of battery cells. The plurality of thermal management components are arranged spaced apart from each other in a first direction, and each thermal management component has a first end and a second end in a second direction. At least one battery cell is arranged between two adjacent thermal management components, and the first direction is perpendicular to the second direction. The first connecting pipe is located on a side of the battery cell group in the second direction, and connects the first ends of two adjacent thermal management components. The first protective mechanism is configured to shield the first connecting pipe, so as to limit the contact between emissions from the battery cell and the first connecting pipe. The probability of the emissions melting the first connecting pipe is reduced, and the probability of fluid leakage from the first connecting pipe caused by the emissions discharged from the battery cell is also reduced, thereby improving the reliability of the battery when in use.
Disclosed in the present application are a monitoring method for an energy storage apparatus, and an electric apparatus and an energy storage apparatus. The energy storage apparatus comprises a housing, an energy storage unit group, and a temperature and humidity sensor, wherein the energy storage unit group and the temperature and humidity sensor are arranged inside the housing. The monitoring method comprises: measuring a real-time temperature and a real-time humidity inside a housing by means of a temperature and humidity sensor; determining a dew point temperature matching the real-time humidity, and comparing the real-time temperature with the dew point temperature, so as to obtain a comparison result; and executing a processing policy matching the comparison result. By means of the method, the present application can monitor the environment inside an energy storage apparatus in real time, and can perform corresponding processing on the environment inside the energy storage apparatus, thereby more effectively maintaining the operation and usage of the energy storage apparatus during the process of using the energy storage apparatus.
Disclosed is an electrolyte filling method for a battery (2), the battery (2) comprising a switching valve (21) having an open state and a closed state. A processing apparatus comprises a vacuum evacuation system and an electrolyte filling system which are independent from each other. The electrolyte filling method comprises a vacuum evacuation step followed by an electrolyte filling step. The vacuum evacuation step comprises: connecting a vacuum evacuation pipe of the vacuum evacuation system to the switching valve (21) to bring the switching valve (21) into the open state; controlling a vacuum evacuation device of the vacuum evacuation system to perform vacuum evacuation on the battery (2); and separating the vacuum evacuation pipe from the switching valve (21) after it is confirmed that the vacuum evacuation is completed, so as to bring the switching valve (21) into the closed state. The electrolyte filling step comprises: connecting an electrolyte filling device (1) of the electrolyte filling system to the switching valve (21) to bring the switching valve (21) into the open state; controlling the electrolyte filling system to fill the battery (2) with an electrolyte; and separating an electrolyte filling pipe from the switching valve (21) after it is confirmed that the electrolyte filling is completed, so as to bring the switching valve (21) into the closed state.
H01M 50/609 - Moyens ou procédés pour le remplissage en liquide, p. ex. avec des électrolytes
H01M 50/60 - Dispositions ou procédés pour le remplissage ou la mise à niveauDispositions ou procédés pour le drainage des liquides des boîtiers
H01M 50/00 - Détails de construction ou procédés de fabrication des parties non actives des cellules électrochimiques autres que les piles à combustible, p. ex. piles hybrides
86.
VALVE OPENING ASSEMBLY, VALVE OPENING DEVICE, AND DRYING SYSTEM
Embodiments of the present disclosure relate to the technical field of batteries, and provide a valve opening assembly, a valve opening device, and a drying system. The direction in which the upper end of a guide surface inclines is a first direction, and the direction opposite to the first direction is a second direction. A pressure applying assembly is movably arranged on a mounting base in the vertical direction. An actuating member is arranged on the mounting base, and at least one of the pressure applying assembly and/or the actuating member is provided with the guide surface. A self-releasing apparatus is arranged on the mounting base; under the action of external force, the self-releasing apparatus can drive the actuating member to move in the first direction to accumulate potential energy, so that under the action of the guide surface, the actuating member presses the pressure applying assembly downward to open a normally-closed valve of a battery cell; and the self-releasing apparatus can gradually release the accumulated potential energy to drive the actuating member to move in the second direction, and the actuating member moving in the second direction gradually releases the pressure applying assembly, so that the normally-closed valve of the battery cell is closed after a preset duration. The self-releasing apparatus does not relate to conversion between mechanical energy and electric energy, thereby reducing damage of a high-temperature environment to a corresponding electric apparatus.
Provided in the present application are a battery welding apparatus and a battery welding method. The battery welding apparatus comprises a conveying line, a battery cell feeding device, a connecting piece feeding device and a welding device. The conveying line comprises a plurality of carriers arranged in a conveying direction thereof. The battery cell feeding device comprises at least two battery cell feeding mechanisms, the at least two battery cell feeding mechanisms being respectively used for feeding at least two battery cell groups into at least two target carriers of the conveying line, and each battery cell group comprising at least two battery cells. The connecting piece feeding device is used for feeding connecting pieces into the at least two target carriers. The welding device is arranged beside the conveying line. The conveying line is movably arranged to successively convey the at least two target carriers to the welding device for welding. The welding device is used for welding the connecting piece and the at least two battery cells in each target carrier. The battery welding apparatus of the present application improves the welding efficiency.
B23K 20/00 - Soudage non électrique par percussion ou par une autre forme de pression, avec ou sans chauffage, p. ex. revêtement ou placage
B23K 20/10 - Soudage non électrique par percussion ou par une autre forme de pression, avec ou sans chauffage, p. ex. revêtement ou placage utilisant des vibrations, p. ex. soudage ultrasonique
The present application provides a battery cell, a battery, an electric device, and a battery state monitoring method. The battery cell comprises a battery body, a carrier communication unit, and a sensor assembly; the battery body is provided with a pole that extends from the interior of the battery body to the exterior of the battery body; the sensor assembly is electrically connected to the carrier communication unit, and the carrier communication unit is electrically connected to the pole; and the carrier communication unit is used for receiving monitoring parameters, generating a parameter packet by means of a link layer on the basis of the monitoring parameters, and converting the parameter packet into a first carrier signal by means of a physical layer, so as to load the first carrier signal on the pole and transmit the first carrier signal to a power supply bus. The present application can use the carrier communication unit to quickly and timely send a carrier signal with the monitoring parameters, thereby reducing the possibility of an accident caused by battery issues and improving the monitoring efficiency of the battery cell.
Provided in the present application are a high-voltage box (400), a battery (100) and an electrical device. The high-voltage box (400) comprises a box body (410) connected to a case body (10), an accommodation cavity (4101) being formed in the box body (410), and the box body (410) being provided with a through hole (411) communicated with the accommodation cavity (4101). The high-voltage box (400) provided in the embodiments of the present application enables an electrical connection structure (30) of the battery (100) to be inserted into the through hole (411) and to extend into the accommodation cavity (4101), such that the electrical connection structure (30) and an electrical component (420) in the box body (410) can be directly and electrically connected, which, compared with the manner of mating connection of a male terminal and a female terminal of a connector, can effectively reduce the probability of connection failure.
A separator and a preparation method therefor, a battery and an electrical apparatus. The separator comprises a base film and a first coating, the first coating being arranged on one side of the base film, the first coating comprising dielectric material particles, and the relative dielectric constant of the dielectric material particles being 1000-10000. The separator comprises the first coating comprising the dielectric material particles having the described relative dielectric constant, thus improving the cycle performance of batteries containing same during quick charging.
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
91.
GEL POSITIVE ELECTRODE SHEET AND PREPARATION METHOD THEREFOR, SECONDARY BATTERY, AND ELECTRICAL APPARATUS
A gel positive electrode sheet and a preparation method therefor, a secondary battery, and an electrical apparatus. The gel positive electrode sheet comprises a positive electrode current collector and a gel positive electrode active material layer; the gel positive electrode active material layer is arranged on one or more surfaces of the positive electrode current collector; the gel positive electrode active material layer comprises a gel electrolyte; the gel electrolyte comprises a nitrile additive, and the nitrile additive comprises a cyano group. Therefore, the high-temperature storage performance and the cycle performance of a secondary battery comprising the gel positive electrode sheet are effectively improved.
A battery cell (20), a battery (100), and an electric device. The battery cell (20) comprises a casing (21), electrode assemblies (22), first insulating members (23), and second insulating members (24), wherein the casing (21) is provided with a first wall portion (213), and the electrode assemblies (22) are accommodated in the casing (21). The electrode assemblies (22) comprise a first electrode lead-out portion (222) and main body portions (221), wherein the first electrode lead-out portion (222) is arranged at the end of the main body portions (221) facing the first wall portion (213) in a first direction. In the first direction, the first insulating members (23) are arranged on the surface of the first wall portion (213) facing the electrode assemblies (22), and the first insulating members (23) are used for insulating the first electrode lead-out portion (222) from the first wall portion (213). In the first direction, at least part of the second insulating members (24) is arranged between the first electrode lead-out portion (222) and the first wall portion (213). The material damage temperature of the second insulating members (24) is greater than the material damage temperature of the first insulating members (23), and the second insulating members (24) can insulate the first electrode lead-out portion (222) from the first wall portion (213) when the first insulating members (23) have melted. When the first insulating members (23) have melted, the second insulating members (24) can still exert the insulation effect, thereby reducing the risk of short circuit and improving the reliability of the battery (100).
POSITIVE ELECTRODE ACTIVE MATERIAL AND PREPARATION METHOD THEREFOR, AND POSITIVE ELECTRODE SHEET, BATTERY CELL, BATTERY, AND ELECTRIC DEVICE COMPRISING SAME
Disclosed in the present application are a positive electrode active material and a preparation method therefor, and a positive electrode sheet, a battery cell, a battery and an electric device comprising same. The preparation method for the positive electrode active material comprises the following steps: providing a lithium-containing phosphate active material or a precursor of a lithium-containing phosphate active material; providing an oxygen-free organic carbon source, wherein the oxygen-free organic carbon source comprises one or more of an oxygen-free polymer and an oxygen-free organic small molecule compound; and uniformly mixing the lithium-containing phosphate active material or the precursor of a lithium-containing phosphate active material with the oxygen-free organic carbon source to obtain a mixture, and then performing a sintering treatment in a protective gas atmosphere, so as to obtain a positive electrode active material. The present application makes the battery have good cycling performance and storage performance.
H01M 4/58 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs de composés inorganiques autres que les oxydes ou les hydroxydes, p. ex. sulfures, séléniures, tellurures, halogénures ou LiCoFyEmploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs de structures polyanioniques, p. ex. phosphates, silicates ou borates
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 4/62 - Emploi de substances spécifiées inactives comme ingrédients pour les masses actives, p. ex. liants, charges
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
94.
ROTATING SPEED ESTIMATION METHOD FOR POSITION-SENSORLESS PERMANENT MAGNET SYNCHRONOUS MOTOR, SYSTEM, AND APPARATUS
A rotating speed estimation method for a position-sensorless permanent magnet synchronous motor, a system, and an apparatus. The method comprises: acquiring a d-axis stator current and a d-axis stator voltage of a motor in a current control period; reconstructing the d-axis stator current and the d-axis stator voltage in the current control period on the basis of rotor flux linkage and d-axis inductance of the motor to obtain a d-axis extended current and a d-axis extended voltage; and inputting the d-axis extended current and the d-axis extended voltage in the current control period into an adaptive observer to obtain a rotating speed estimation value and a rotor position estimation value of the motor in the current control period. According to the rotating speed estimation method in the present application, by means of the adaptive observer, the rotating speed and rotor position estimation of a salient pole permanent magnet synchronous motor can be achieved, the rotating speed and rotor position estimation of a non-salient pole permanent magnet synchronous motor can also be achieved, and the precision of the rotating speed and rotor position estimation of the motor is guaranteed.
A composite positive electrode material, a preparation method therefor, a positive electrode sheet, a secondary battery, and an electric device are provided. The preparation method comprises: according to a preset proportion, mixing a lithium source, a phosphorus source, an iron source, a carbon source and a carbon graphitization catalyst with a solvent to form a mixed slurry; grinding and drying the mixed slurry to obtain a mixed dry substance; and sintering the mixed dry substance to obtain a composite positive electrode material, wherein the sintering temperature is 750˚C-840˚C.
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 4/133 - Électrodes à base de matériau carboné, p. ex. composés d'intercalation du graphite ou CFx
H01M 4/136 - Électrodes à base de composés inorganiques autres que les oxydes ou les hydroxydes, p. ex. sulfures, séléniures, tellurures, halogénures ou LiCoFy
H01M 4/1393 - Procédés de fabrication d’électrodes à base de matériau carboné, p. ex. composés au graphite d'intercalation ou CFx
H01M 4/1397 - Procédés de fabrication d’électrodes à base de composés inorganiques autres que les oxydes ou les hydroxydes, p. ex. sulfures, séléniures, tellurures, halogénures ou LiCoFy
96.
NEGATIVE ELECTRODE COMPOSITION, NEGATIVE ELECTRODE SHEET AND PREPARATION METHOD THEREFOR, BATTERY AND ELECTRIC DEVICE
The present application belongs to the technical field of batteries. Provided are a negative electrode composition, a negative electrode sheet and a preparation method therefor, a battery and an electric device. The negative electrode sheet comprises a negative electrode current collector and a negative electrode modification layer located on a surface of the negative electrode current collector, wherein the negative electrode modification layer comprises lithium sulfide, a lithium alloy formed by lithium and a lithiophilic metal, and a lithiophobic metal, the atomic molar ratio of the lithiophilic metal in the lithium alloy to the lithiophobic metal being (1-30):1. The negative electrode sheet can improve the safety and cycling stability of a battery.
The present application relates to the technical field of batteries, and provides a winding device and a winding method. The winding device comprises a feeding mechanism and a winding needle. The feeding mechanism is used for conveying an electrode sheet and a separator, and the winding needle is used for winding the electrode sheet and the separator which are conveyed by the feeding mechanism to form an electrode assembly, wherein the relationship between the diameter r of the winding needle and the diameter R of the electrode assembly formed by winding satisfies: (R/r)>10.
H01M 10/0587 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure enroulés, c.-à-d. des électrodes positives enroulées, des électrodes négatives enroulées et des séparateurs enroulés
98.
NEGATIVE ELECTRODE CURRENT COLLECTOR, BATTERY CELL, BATTERY AND ELECTRIC DEVICE
The present application discloses a negative electrode current collector, a battery cell, a battery and an electric device. The negative electrode current collector comprises a substrate and an alloy layer located on at least one side of the substrate; the alloy layer comprises a first metal element and a second metal element; the substrate comprises a third metal element; the nucleation overpotential of a simple substance of the second metal element is smaller than that of a simple substance of the first metal element; the nucleation overpotential of a lithium metal of the simple substance of the first metal element is greater than or equal to 0.10 V; and the nucleation overpotential of the simple substance of the second metal element is smaller than the nucleation overpotential of a simple substance of the third metal element. The present application can enable the battery to have high coulombic efficiency, high reliability and long cycle life.
The present application relates to a formation method for a metal battery, a metal battery and an electrical apparatus. The formation method comprises: successively charging a battery cell n times, n≥2, the charging being in a negative pressure environment, and as the number of charging times increases, used charging rates increasing progressively and the temperatures of temperature conditions for the charging decreasing progressively. Using the formation method can remarkably reduce gas produced by metal batteries in storage and usage processes so as to ameliorate the bulging problem of battery cell pouches, and moreover have certain improvement effects on the cycle performance of the batteries.
The present application applies to the technical field of batteries. Provided are a current collecting assembly and a preparation process therefor, a heat exchange apparatus, a battery and an electric device. The current collecting assembly comprises a current collector and a connector, wherein the current collector is a non-metal part, and the connector is a metal part; the current collector and the connector constitute an integrally formed component; and the current collector is connected to a heat exchanger by means of the connector. The present application aims to reduce the processing difficulty of a heat exchange device, and can appropriately reduce the cost.
