The present method of forming a polar plate comprises:
a stamping step:
implemented by a stamping press, which includes a stamping tool mounted on a slider moved by vertical reciprocating movement; and
during which a network of channels for circulating fluids is stamped on the strip; and
a downstream step subsequent to the stamping step and implemented by a downstream press;
wherein:
once the channel network is stamped on the strip, while the strip is held clamped in the stamping tool, a reference mark is formed on the strip by means of a marking tool carried by the slider; and
during the downstream step, the strip is positioned with respect to the downstream press by means of positioning members mounted on the downstream press and which cooperate with the reference mark.
The invention relates to a method in which an effluent comprising catalytic ink residues and water or a hydro-alcoholic mixture of water and alcohol A is produced, which is heated to a temperature point and to a pressure causing the evaporation of water and/or alcohol A and the concentrate is recovered. The latter contains the catalytic particles and the electrolytic polymer substantially in their known relative amounts in the catalytic ink. This concentrate is then used to produce a fresh ink, in particular by adding this concentrate to a production ink.
The invention relates to a polar plate (7) for an electrochemical cell of a fuel cell, comprising a central portion (73) that forms a flow field (73.1) for a functional fluid, and a peripheral portion (74), which surrounds the central portion and which comprises two distribution holes (74.1, 74.2) arranged on either side of the central portion in order to feed and discharge the functional fluid, respectively, with respect to the flow field. For each distribution hole, the peripheral portion comprises a flow rim (74.1A, 74.2A), which partly defines the distribution hole on a portion of the distribution hole, facing the central portion, and a plurality of fluid passage openings (74.7, 74.8) which are all located between the flow rim of the distribution hole and the central portion, and each elongate in a main direction that is parallel to the flow rim.
H01M 8/0247 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form
H01M 8/0258 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
H01M 8/2483 - Details of groupings of fuel cells characterised by internal manifolds
5.
SEPARATOR PLATE, ELECTROCHEMICAL CELL AND ELECTROCHEMICAL DEVICE
The separator plate (15, 17) comprises: - an active zone (39); - a homogenization zone (43); - an intermediate zone (45) positioned longitudinally between the active zone (39) and the homogenization zone (43); the homogenization zone (43) of the separator plate (15, 17) having a homogenization end wall (51) at a first altitude (a1); the intermediate zone (45) of the separator plate (15, 17) having an intermediate end wall (55) at a second altitude (a2) greater than the first altitude (a1), the intermediate end wall (55) being separated from the homogenization end wall (51) by a step (59); a buffer volume (60) for equalizing the distribution of the reactive fluid arriving from the homogenization zone (43) in the active channels (41) being defined between the intermediate end wall (55), the step (59) and the end of the active teeth.
H01M 8/0258 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
H01M 8/026 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
H01M 8/0265 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
The separator plate (15, 17) comprises: - an active zone (39, 47); - a homogenization zone (68) having a field (C) in which a group of homogenization channels (69) is provided, the homogenization channels (69) being juxtaposed from a first side (01) of the field (C) in the transverse direction; each homogenization channel (69) having a rectilinear portion (75) which extends in an eigendirection and has a substantially constant width perpendicular to the eigendirection, two adjacent rectilinear portions (75) being separated by a tooth (79); the eigendirections of the rectilinear portions (75) of the homogenization channels (69) forming acute angles (a) with the longitudinal direction, at least two consecutive acute angles (a) being different, and at least some teeth (79) having divergent opposite edges (81, 83).
H01M 8/0258 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
H01M 8/026 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
H01M 8/0265 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
H01M 8/0267 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors having heating or cooling means, e.g. heaters or coolant flow channels
7.
METHOD FOR RECYCLING CATALYST INK RESIDUES IN A CATALYST INK PRODUCTION AND/OR DEPOSITION PLANT FOR FUEL CELLS
The invention relates to a method for recycling residues of a catalyst ink comprising catalyst particles, an electrolyte polymer, and water. The method comprises providing an effluent containing the catalyst ink residues, filtering the effluent through a filter membrane, leading to the formation of a retentate containing the catalyst particles contained in the effluent, all or part of the electrolyte polymer, and water, and then, preferably, the diafiltration thereof by adding water. Filtration and diafiltration are preferably tangential and dynamic. The ink residues may originate from the cleaning of a catalyst ink production and/or deposition plant, or from the dissolution of ink layers on the surface of a fuel cell membrane electrode assembly. The invention further relates to a composition for recycling and to a method for producing a new ink incorporating the composition for recycling.
PERIPHERAL SEAL, POLAR SEPARATOR COMPRISING SUCH A SEAL, ELECTROCHEMICAL CELL COMPRISING SUCH A SEPARATOR, FUEL CELL COMPRISING SUCH AN ELECTROCHEMICAL CELL, AND VEHICLE COMPRISING SUCH A FUEL CELL
The peripheral seal (40) further comprises an electrically insulating pad (43, 45, 47, 49) at specific points which is integral with the sealing portion (41), the pad (43, 45, 47, 49) projecting from the sealing portion (41) towards an exterior of the sealing portion (41), in a direction of extent parallel to the seal plane (P40), the pad (43, 45, 47, 49) being configured to be in contact with the first polar plate when the peripheral seal (40) is integrated in the electrochemical cell.
GUIDE AND POLAR PLATE FOR A POLAR SEPARATOR OF AN ELECTROCHEMICAL CELL, SEPARATOR COMPRISING SUCH A GUIDE AND POLAR PLATE, AND FUEL CELL COMPRISING SUCH A SEPARATOR
The invention relates to a guide (50C) for a polar separator of an electrochemical cell, which guide comprises walls (52H; 52C) arranged side-by-side along a surface plane (P11H; P11C), so as to define channels (57C) for guiding the functional fluid, each channel being defined by and between two walls. Each wall comprises an application surface (63C) which is coplanar with the surface plane and via which the wall bears against a receiving surface (41H). The guide comprises an anchoring mat (51C) interconnecting the walls. The walls and the anchoring mat together form a single monolithic piece made of joint material. The anchoring mat extends from the walls beyond the surface plane, so that it can be housed in an anchoring cavity, in order to anchor the guide (50C) received at the receiving location.
H01M 8/0247 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form
H01M 8/0258 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
10.
PLATE AND PERIPHERAL SEAL FOR A FUEL CELL, POLAR SEPARATOR COMPRISING SUCH PLATE AND SEAL, ELECTROCHEMICAL CELL COMPRISING SUCH A SEPARATOR, ASSOCIATED STACK AND FUEL CELL
The invention relates to a peripheral zone which comprises at least one plate through-hole (28a, 28b, 28c), an inner rim (31; 131), extending between the plate hole (28a, 28b, 28c) and the circulation field (23; 123), and an outer rim (32; 132). The inner and outer rims together define the plate hole (28a, 28b). The peripheral zone (21; 121) comprises at least one fin (38) integral with, projecting from and secant with the outer rim (32). The outer rim (32) receives an outer portion (43) of a peripheral seal (40) and the fin (38, 138; 238a, 238b) receives an extension (46) of the peripheral seal (40) when the peripheral seal (40) and the plate (13) are integrated with the fuel cell.
The invention relates to a fuel cell comprising a stack of bipolar plates in a stacking direction, each two consecutive bipolar plates forming at least one cell therebetween, the stack further comprising two end plates on either side of the stack, a plurality of measurement modules, each module comprising at least one printed circuit comprising a computer capable of determining diagnostic and prognostic characteristics of the stack of bipolar plates, and a mechanical frame for holding the measurement modules, in which the measurement modules are fixed to the mechanical frame, connected to one another and connected to the stack of bipolar plates, without the intermediary of cables.
H01M 8/0202 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors
B60L 50/70 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
B60R 16/033 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric for supply of electrical power to vehicle subsystems characterised by the use of electrical cells or batteries
The invention relates to a polar plate (40, 60) that comprises a base plate (41, 61) made of a first electrically conductive material, and a plurality of channels (43, 63, 73) extending along a longitudinal axis (Y), wherein each channel comprises a channel bottom (47, 67, 77) and two channel teeth (45, 65, 75), arranged on either side of the channel bottom, and wherein each channel tooth is made of at least one second material and comprises a front face (46, 66, 76) and two side faces (48, 68, 78). The polar plate comprises a coating (50, 70) that comprises a first zone covering and being in electrical contact with the first material of the base plate, a second zone covering the side faces, and a third zone covering at least one portion of the front faces, wherein the first, second, and third zones of the coating form a continuous material layer.
The invention relates to a fuel cell stack comprising a plurality of identical bipolar plates (12), stacked in a stacking direction. Each bipolar plate is formed by two monopolar plates, which are placed one on top of the other and which together form at least one pocket at one end of the bipolar plate. Each pocket having an end opening configured to receive a pin of a fuel cell measurement module, any two successive bipolar plates being stacked head-to-tail.
H01M 8/248 - Means for compression of the fuel cell stacks
H01M 8/0247 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form
H01M 8/0258 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
H01M 8/0276 - Sealing means characterised by their form
The fuel cell comprises a stack of bipolar plates in a stacking direction, two consecutive bipolar plates forming a cell therebetween. The fuel cell further comprises two end plates on either side of the stack and a plurality of measurement modules connected to the bipolar plates. Each measurement module comprises at least one printed circuit comprising a computer capable of determining diagnostic and prognostic characteristics of the stack of bipolar plates. The measurement modules are at least configured to measure an impedance of the battery when the fuel cell is in operation.
The invention relates to a fuel cell (20) comprising a plurality of unit cells stacked along a main axis (A30) so as to form a stack (30) of cells, the stack being housed in a casing (22) with a sleeve (24) closed by a first cover (26B) and a second cover (26A) opposite the first cover along the main axis. When the fuel cell is in an operating configuration, the main axis is substantially horizontal, and the housing has a top side and a bottom side. The first cover comprises a main ventilation inlet (434) that opens into the housing at a highest point of the first cover, while the second cover comprises a first main ventilation outlet (442) that opens into the housing at a highest point of the second cover, and a second main outlet (444) that opens into the housing at a lowest point of the second cover.
H01M 8/2475 - Enclosures, casings or containers of fuel cell stacks
H01M 8/04225 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells during start-up
H01M 8/04223 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells
H01M 8/04302 - Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during start-up
16.
FUEL CELL SYSTEM AND METHOD FOR CONTROLLING THIS SYSTEM
The invention relates to a fuel cell system (1) comprising a fuel cell (10) and an air circuit (30) comprising a feed line (31) provided with a compressor (31.1), a discharge line (32), a humidifier (33) arranged partially in the feed line and partially in the discharge line, and a recirculation branch (36) connecting the discharge line to the feed line. The recirculation branch is connected to the feed line both downstream of a first flow control valve (31.3) and upstream of the humidifier while being connected to the discharge line both downstream of the humidifier and upstream of a second flow control valve (32.1). The recirculation branch is provided with a pump (36.1) which, when the first and second valves are closed, circulates air in a closed loop (A2) through the cell and the humidifier but not through the compressor.
H01M 8/04089 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
H01M 8/04119 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyteHumidifying or dehumidifying
H01M 8/0662 - Treatment of gaseous reactants or gaseous residues, e.g. cleaning
H01M 8/04225 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells during start-up
H01M 8/04228 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells during shut-down
H01M 8/04223 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells
H01M 8/04302 - Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during start-up
The invention relates to a supply line (21) of the hydrogen circuit provided with a mixer (21.1) for mixing hydrogen from a tank (2) and hydrogen recirculated from an anode outlet (12) of the stack, and a heat exchanger (21.5) located upstream of the mixer to heat the hydrogen from the tank. The cooling circuit includes a supply line (41) connecting a radiator (3) to a cooling inlet (15) of the stack, a return line (42) connecting a cooling outlet (16) of the stack to the radiator, and a branch (46) connected to the return line to form a closed loop upstream of the radiator. The branch connects the heat exchanger to the return line in parallel so that the heat exchanger transfers heat to the hydrogen from the tank using a fraction of the cooling fluid from the cooling outlet.
The present invention relates to a method for driving an electrochemical system (10), comprising: - opening a purge valve (41), letting a stack anode outlet gas flow from a stack anode outlet (22) of a fuel-cell stack (20) to a filter cathode inlet (36) of an electrochemical filter (35); - measuring a filter cathode pressure. The method further comprises the following steps: - opening a cathode valve (42) when the filter cathode pressure is less than or equal to the first pressure threshold; and - opening a fluid control device (43) when a pressure (P38) measured at the filter anode outlet (38) is greater than a second pressure threshold. The first pressure threshold is between a stack outlet cathode pressure and a stack outlet anode pressure.
H01M 8/04119 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyteHumidifying or dehumidifying
H01M 8/04223 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells
H01M 8/0662 - Treatment of gaseous reactants or gaseous residues, e.g. cleaning
19.
ELECTROCHEMICAL SYSTEM, AND METHOD FOR CONTROLLING SUCH A SYSTEM
The system comprises a filter recirculation circuit (50), comprising a filter recirculation valve (51) configured to assume an open configuration in which the recirculation valve connects the filter anode outlet to the filter cathode outlet, and a closed configuration in which the filter recirculation valve separates the filter anode outlet from the filter cathode outlet.
H01M 8/04089 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
H01M 8/04119 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyteHumidifying or dehumidifying
H01M 8/04223 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells
The present invention relates to a method for starting up a fuel-cell stack (20) belonging to an electrochemical system (10) also comprising a filter (40) configured to be electrically powered so as to filter dihydrogen contained in a gas fed to the filter and to deliver filtered dihydrogen to a recirculation outlet (43) of the filter. The method comprises: - feeding the anode compartment (21) of the stack with dihydrogen and discharging gas coming from the anode compartment of the stack to the filter; - using the filter, filtering the dihydrogen contained in the gas fed to the filter and delivering the filtered dihydrogen to the recirculation outlet; - simultaneously with the filtration of the dihydrogen, measuring an electrical quantity representative of the operation of the filter; and - when the measured electrical quantity reaches a reference value, feeding the cathode compartment (24) of the stack with air.
H01M 8/04089 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
H01M 8/04111 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants using a compressor turbine assembly
H01M 8/04225 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells during start-up
H01M 8/04223 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells
The electrochemical device comprises a stack of electrochemical cells (5), each comprising: anode/cathode separator plates (15, 17) that comprise, between the homogenisation zone (43, 57) and the active zone (39, 53), an intermediate zone (45, 59) with intermediate channels (47, 61); wherein the edge (21) of the frame (19) is positioned between the membrane (9) and the gas diffusion layers (11), between the intermediate anode zone (45) and the intermediate cathode zone (59); wherein the intermediate cathode channels (61) have, in a transverse direction, a first cathode width greater than that of the intermediate anode teeth (69) and the intermediate anode channels (47) have, in a transverse direction, a second anode width greater than the width of the intermediate cathode teeth (71); and wherein each intermediate anode tooth (69) is positioned opposite an intermediate cathode channel (61) and each intermediate cathode tooth (71) is positioned opposite an intermediate anode channel (47).
H01M 8/0247 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form
H01M 8/0258 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
H01M 8/0267 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors having heating or cooling means, e.g. heaters or coolant flow channels
H01M 8/0273 - Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
H01M 8/0254 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form corrugated or undulated
H01M 8/026 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
H01M 8/0265 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
H01M 8/2483 - Details of groupings of fuel cells characterised by internal manifolds
H01M 8/1004 - Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
The invention relates to a stack (2), for a fuel cell, comprising a primary separator (10), with a primary circulation field (12) and a primary rim (13). The stack comprises a primary inner fin (20A), integral with the primary separator, projecting from the primary rim, connected to the primary circulation field and intended to bear against a primary gas-diffusion layer of a membrane electrode assembly (30). The stack comprises a primary peripheral seal (70), intended to be positioned between the primary rim and a peripheral zone of the membrane electrode assembly (30). According to the invention, the stack comprises a primary outer fin (71A), integral with the primary peripheral seal, which projects from the primary rim (13), which is offset with respect to the primary inner fin and which is intended to be positioned between the primary rim and the primary gas-diffusion layer.
H01M 8/0273 - Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
H01M 8/0276 - Sealing means characterised by their form
H01M 8/242 - Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes comprising framed electrodes or intermediary frame-like gaskets
H01M 8/0258 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
H01M 8/0254 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form corrugated or undulated
H01M 8/0247 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form
11), - a reference temperature, corresponding to a relative humidity level in the cathode compartment of each cell of the stack equal to 100%, is calculated on the basis of the produced current, of a flow rate of air leaving the stack, and of a pressure prevailing in the cathode compartment of each cell, - the regulating circuit is controlled so that the temperature of the heat-transfer fluid entering the stack is between 100% and 140% of the reference temperature.
H01M 8/04228 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells during shut-down
H01M 8/04303 - Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during shut-down
144), during which: • the air supply and exhaust to/from the cell are cut off, and • the dissipative system is electrically connected to the cell and dissipates the electrical power produced by the cell.
H01M 8/04228 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells during shut-down
H01M 8/04303 - Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during shut-down
The present invention relates to a monopolar plate (30) for a fuel cell. This monopolar plate formed of two monopolar half-plates (32, 34) defines at least one opening for circulation of a heat-transfer fluid, a central zone, intended to face an active zone of a membrane-electrode assembly (8), and a homogenization zone comprising, between the two monopolar half-plates (32, 34), a fluid communication space which connects the heat-transfer fluid circulation opening to the central zone, the fluid communication space having a volume defined by the two monopolar half-plates. At least a portion of the homogenization zone is compressed, such that the volume of the fluid communication space is reduced relative to the volume of the fluid communication space before compression.
H01M 8/0247 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form
H01M 8/026 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
H01M 8/0267 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors having heating or cooling means, e.g. heaters or coolant flow channels
28.
MONOPOLAR PLATE FOR A FUEL CELL, METHOD FOR THE PRODUCTION THEREOF AND FUEL CELL COMPRISING SUCH A MONOPOLAR PLATE
This monopolar plate, formed of two monopolar half-plates (32, 34), defines at least one opening for circulation of a heat-transfer fluid, a central zone, intended to face an active zone of a membrane-electrode assembly (8), and a homogenization zone comprising, between the two monopolar half-plates (32, 34), a fluid communication space which fluidically connects the heat-transfer fluid circulation opening to the central zone, the fluid communication space having a volume defined by the two monopolar half-plates. At least part of the fluid communication space (64) of the homogenization zone is equipped with an insert (80) for reducing its volume.
H01M 8/0254 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form corrugated or undulated
H01M 8/026 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
H01M 8/0265 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
H01M 8/0267 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors having heating or cooling means, e.g. heaters or coolant flow channels
H01M 8/2483 - Details of groupings of fuel cells characterised by internal manifolds
29.
BIPOLAR PLATE FOR A FUEL CELL, FUEL CELL COMPRISING SUCH BIPOLAR PLATES AND METHOD FOR PRODUCING SUCH A FUEL CELL
H01M 8/0254 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form corrugated or undulated
H01M 8/026 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
H01M 8/0263 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
30.
INK FOR A FUEL CELL ELECTRODE, PROCESS FOR THE PREPARATION OF SUCH AN INK AND AN ELECTRODE, AND FUEL CELL HAVING SUCH AN ELECTRODE
The invention also relates to a process for preparing said ink, a method for applying the dried ink thus produced to a base membrane or a gas diffusion layer, the membrane or layer coated with said ink, a membrane-electrode or a membrane electrode assembly, and a fuel cell having said ink.
The present invention relates to a stack (11) for a fuel cell (10), the stack comprising a separator plate (12) comprising a peripheral zone (35) with a pair of plate ports (39a, 39b, 39c), the pair of plate ports (39a, 39b, 39c) comprising a plate supply port (31a, 31b, 31c) and a plate discharge port (33a, 33b, 33c). The fuel cell comprises a membrane-electrode assembly (50) comprising a peripheral portion (52) provided with a pair of ports of the assembly (59a, 59b, 59c) with an assembly supply port (51a, 51b, 51c) and an assembly discharge port (53a, 53b, 53c). The pair of plate ports (39a, 39b, 39c) are rotationally symmetrical about a plate centre axis and an area of the cross section of the assembly supply port (51a, 51 b, 51c) is smaller than an area of the cross section of the assembly discharge port (53a, 53b, 53c).
H01M 8/0247 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form
H01M 8/0265 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
H01M 8/242 - Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes comprising framed electrodes or intermediary frame-like gaskets
H01M 8/2483 - Details of groupings of fuel cells characterised by internal manifolds
32.
Method for Detecting a Hydrogen Leak in a Fuel Cell System and Fuel Cell System for Implementing Such a Method
This method for detecting a hydrogen leak applies to a fuel cell system (10) comprising a fuel cell (12); a hydrogen supply system (30) comprising a reservoir (32) and the supply circuit (34) connecting the reservoir to the anode compartment (16) of the fuel cell and comprising an ejector (36) of Venturi type; a recirculation circuit (60) for recirculating unconsumed hydrogen between the anode compartment of the cell and the Venturi-type ejector (36), the recirculation being driven by the Venturi-effect ejector. The method comprises steps involving calculating the total flow rate of hydrogen consumed; calculating the flow rate of hydrogen admitted to the ejector; determining the leak rate as the difference between the flowrate of hydrogen admitted and the total flow rate of hydrogen consumed; and detecting a potential leak of hydrogen by comparing the leak rate against at least a threshold value, such that the method detects all of the hydrogen leaks that occur in the system downstream of the ejector.
G01M 3/26 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
H01M 8/04082 - Arrangements for control of reactant parameters, e.g. pressure or concentration
H01M 8/04089 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
H01M 8/04223 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells
The invention relates to a cell (2) for a fuel cell (1) comprising a first polar plate (100), the first polar plate comprising a peripheral region (102), a membrane electrode assembly (200) superimposed on the first polar plate and comprising a peripheral portion (202), and at least one gas diffusion layer (205) interposed between a polymer proton exchange membrane (204) and the first polar plate, and a first peripheral seal (300) providing a seal for the reactant fluid between, on the one hand, a bypass region (50) of the cell and, on the other hand, a region (3) outside the cell, the seal comprising a main portion (301) and at least one fin (302) extending into the bypass region, characterised in that the fin further comprises an end portion (306) interposed between the gas diffusion layer and the peripheral region, and an intermediate portion (305) which is oblique with respect to the main portion.
H01M 8/0273 - Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
H01M 8/0276 - Sealing means characterised by their form
H01M 8/242 - Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes comprising framed electrodes or intermediary frame-like gaskets
The invention relates to a subassembly for a fuel cell stack comprising at least a first bipolar half-plate (42) and a membrane-electrode assembly including a membrane and a bipartite frame (30) formed by a first half-frame (32) and a second half-frame (34). At least the second half-frame (34) is coated, on a first surface (S34) opposite a first surface (S32) of the first half-frame, with a layer of securing glue. First apertures (320) through the first half-frame (32) are each arranged opposite a solid portion (42A) of the first bipolar half-plate and opposite a solid portion (34A) of the second half-frame in a direction perpendicular to a main plane of the membrane (TT22). The first bipolar half-plate (42) is rigidly attached to the frame (30) by a quantity (Q2) of glue which extends through the first apertures (320) and which comes from the glue coated on the first surface (S34) of the second half-frame (34).
The invention relates to a cartridge (1) for a fuel cell, comprising: a base (10) for holding the cartridge in a direction opposite to the compression direction (X1) when the base is received in a receiving opening; a foot (20) which slides with respect to the base and bears against a stack of the fuel cell when the base is received in the receiving opening; a spring (30) which bears on the base in order to apply a pressing force (F30) on the foot; and a holding system (40) having primary (41) and secondary (42) retaining portions which are capable of being coupled to one another when the cartridge is in a preloaded configuration so as to thus prevent the foot from sliding and of being decoupled from one another when the cartridge is in a released configuration, thus allowing the foot to slide. The aim of the invention is to simplify compression of the fuel cell stack while improving the accuracy of this compression.
The invention relates to a fuel cell (1), comprising: stacked plates (10, 30, 50, 70), each plate comprising a relevant exchange edge to form an exchange face (5); an outer manifold, fluidly connected to the exchange face; and a manifold seal (90), which frames the exchange face (5) to ensure the tightness of the fluid connection. In order for the manifold seal to have a better controlled shape and be easier to apply, each plate comprises a relevant centring notch, adjacent to the exchange edge, so as to form a centring groove (6) bordering the exchange face. The manifold seal comprises a longitudinal seal portion (91) formed in the centring groove and ensuring the tightness of the fluid connection.
The invention relates to a single cell (100) of a fuel cell stack, which comprises a plurality of walls (102), that are each continuous and sealed, which define compartments (V100) of the single cell and which are held by a sealing structure (200). The sealing structure is formed from a stack of wall frames (220), which each surround an associated wall (102), compartment frames (230), which are each arranged at the periphery of a corresponding compartment (V100), and adhesive layers (240), which are inserted between each of the frames of the sealing structure so as to sealingly secure the frames to each other. Each wall forms, with its associated wall frame, a peripheral gap, which is sealingly closed, on at least one of the faces of this wall, by a compartment frame arranged opposite this peripheral gap.
Fuel cell, comprising: a base plate (11); a stack (20) bearing against the base plate (11); and a compression system, which comprises: a bearing plate (30), movable and bearing against the stack (20); springs (50), bearing against the bearing plate (30); and a flange (40), bearing against the springs (50). So that the fuel cell is particularly stable over time, the fuel cell comprises a first sliding connection (70), for guiding the bearing plate (30) in sliding movement relative to the base plate (11), and pulling plates (60) separated from one another and having anchors fastening them to the base plate (11) and to the flange (40) for holding the stack (20) in compression between the base plate (11) and the bearing plate (30) via the anchors, under the action of the springs (50).
The invention relates to a method for running in a PEM fuel cell, the method comprising at least a first running-in phase (P2), followed by an operation of reversing the direction of the dihydrogen and air streams (P3), and then a second running-in phase (P4). The running-in phases each comprise a step (4) of stabilizing the fuel cell in which the current density produced by the cell is kept constant at a low value for a given duration, followed by an oxygen depletion step (5), during which the current density is kept constant at a minimum value, lower than or equal to the low value, and during which the air supply is at least partially interrupted, being adjusted so as to obtain a cathode stoichiometry coefficient of strictly less than 1. The oxygen depletion steps of the first and second running-in phases end when the cell voltage of the fuel cell reaches a predefined threshold voltage.
The invention relates to a separator plate (21) which includes, in a first face: a plurality of corrugated channels (49) for the circulation of a first reactive gas, the corrugated channels (49) having respective end portions (50) all extending in the same first direction (D1) and forming corrugations having the same specific period (T1); a plurality of oblique channels (56), each extending in a second direction (D2) intersecting with the first direction (D1), the end portion (50) of each corrugated channel (49) connecting to one of the oblique channels (56) at a junction point (58); the junction points (58) defining projection points (p) projecting on a straight line (D) parallel to the first direction (D1), the projection being in a third direction (D3) perpendicular to the first direction (D1), the projection points (p) being regularly spaced apart from one another in the first direction (D1) and separated from one another by a constant spacing equal to a multiple of the specific period (T1).
H01M 8/0263 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
H01M 8/026 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
The invention relates to a fuel cell (10) which comprises a casing, a stack of electrochemical cells, a stationary end plate and a movable end plate (16) clamping the stack between them, and a guide system (30) for guiding the movable end plate, which guide system limits the movement of the movable end plate perpendicularly to a stacking direction (X). In order to control the positioning of the movable end plate, the guide system comprises at least one compression member (32) exerting a compression force (E32) on the movable end plate in a compression direction (Y), two guide members (36A, 36B) attached to the movable end plate, and two oblique supports (38A, 38B) which are attached to the casing, extend parallel to the stacking direction, and are oblique with respect to the compression direction and with respect to a centring direction (Z). Under the effect of the compression force, the guide members bear against the oblique supports and centre the movable end plate, parallel to the centring direction, with respect to the casing.
Said method for forming a polar plate (100) involves: - an embossing step (220): - which is carried out by an embossing press (40) comprising an embossing tool (43A) mounted on a slide that undergoes a reciprocating vertical movement, and - during which a network of fluid flow channels (104) is embossed on the strip, - a downstream step (230) that follows the embossing step and is carried out by a downstream press (60). According to the invention: - once the network of channels (104) is embossed on the strip (12), while the strip (12) is kept clamped in the embossing tool (43A), a mark (222) is formed in the strip by means of a marking tool (224) carried by the slide, - during the downstream step (230), the strip is positioned in relation to the downstream press (60) by means of positioning members (238) which are mounted on the downstream press and cooperate with the mark (222).
B21D 22/02 - Stamping using rigid devices or tools
B21D 28/04 - Centering the workPositioning the tools
B21D 28/26 - Perforating, i.e. punching holes in sheets or flat parts
B21D 37/08 - Dies with different parts for several steps in a process
B21D 43/05 - Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
H01M 8/0202 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors
H01M 8/0267 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors having heating or cooling means, e.g. heaters or coolant flow channels
Said forming plant (10) is configured to form polar plates in series from a strip (12) and comprises three presses, each of which comprises an actuating device (28) moving a slide in a reciprocating vertical movement and which include: - an upstream press (50), - an intermediate press (40) comprising an embossing tool (42) configured to relief-emboss a network of flow channels on the strip, and - a downstream press (60). According to the invention: - the strip (12) passes continuously through the three presses, - the forming plant comprises tensioning members configured to keep portions (16A) of the strip located in the presses under tension while keeping the portions (26B) of the strip located between the presses slack, - the actuating device (28) of the intermediate press exerts, on the embossing tool (42), a pressing force which extends through a connection point between the slide and the actuating device and which penetrates the network of channels.
B21D 22/02 - Stamping using rigid devices or tools
B21D 28/04 - Centering the workPositioning the tools
B21D 28/26 - Perforating, i.e. punching holes in sheets or flat parts
B21D 37/08 - Dies with different parts for several steps in a process
B21D 43/02 - Advancing work in relation to the stroke of the die or tool
B21D 43/05 - Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
41 - Education, entertainment, sporting and cultural services
Goods & Services
Education, training and teaching services; organization and
conducting of colloquiums, conferences, congresses and
seminars for educational, training and teaching purposes;
practical training [demonstration]; organization and
conducting of training (and apprenticeship) workshops;
providing training online; education, training and teaching
services provided online, all of the aforesaid services are
limited to the field of hydrogen, including fuel cells, for
mobility and stationary solutions.
41 - Education, entertainment, sporting and cultural services
Goods & Services
Education services, namely, providing trainings, seminars, classes, workshops, in the field of hydrogen fuel cells for mobility and stationary solutions; organization and conducting of educational colloquiums, conferences, congresses and seminars in the field of hydrogen fuel cells for mobility and stationary solutions; practical educational training demonstrations in the field of hydrogen fuel cells for mobility and stationary solutions; organization and conducting of training and apprenticeship workshops in the field of hydrogen fuel cells for mobility and stationary solutions; on-line training services in the field of hydrogen fuel cells for mobility and stationary solutions; online education services, namely, providing online trainings, seminars, classes, workshops in the field of hydrogen fuel cells for mobility and stationary solutions
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Fuel cells; hydrogen fuel cells; rechargeable batteries; fuel cell systems comprising fuel cells and batteries, and components for fuel batteries and cells, namely, anodes, cathodes, fuel cells and electrodes Vehicles, namely, land vehicles, railway rolling stock, water vehicles in the nature of boats, water scooters, ships, barges, air vehicles for transport; fuel-cell vehicles, namely, fuel-cell cars, fuel-cell trucks, fuel-cell vans, fuel-cell buses, fuel-cell trailers, fuel-cell railway passenger cars, fuel-cell tractors, fuel-cell railway rolling stock, fuel-cell water vehicles in the nature of ships and submarines; fuel cell forklift trucks
The invention relates to a fuel cell (10) comprising a stack (11) of bipolar plates (12) in a stacking direction (L), each two consecutive bipolar plates (12) forming at least one cell (14) therebetween, the stack (10) further comprising two end plates (16) on either side of the stack (11), a plurality of measurement modules (20), each module (20) comprising at least one printed circuit comprising a computer capable of determining diagnostic and prognostic characteristics of the stack (11) of bipolar plates (12), and a mechanical frame (40) for holding the measurement modules (20), in which the measurement modules (20) are fixed to the mechanical frame (40), connected to one another and connected to the stack (11) of bipolar plates (12) without the intermediary of cables.
The invention relates to a fuel cell (10) comprising a stack (11) of bipolar plates (12) in a stacking direction (L), two consecutive bipolar plates (12) forming a cell (14) therebetween. The fuel cell (10) further comprises two end plates (16) on either side of the stack (11) and a plurality of measurement modules (20) which are connected to the bipolar plates (12). Each measurement module (20) comprises at least one printed circuit (22) comprising a computer capable of determining diagnostic and prognostic characteristics of the stack (11) of bipolar plates (12). The measurement modules (20) are at least configured to measure an impedance of the fuel cell (10) when the fuel cell (10) is in operation.
The invention relates to a fuel cell stack comprising a plurality of identical bipolar plates (12) stacked in a stacking direction (A11). Each bipolar plate (12) is formed by two monopolar plates which are placed one on top of the other and which together form at least one pocket (20) at one end of the bipolar plate (12), each pocket (20) having an end opening (28) configured to receive a pin (22) of a fuel cell measurement module (18), any two successive bipolar plates (12) being stacked head-to-tail.
This method for detecting a hydrogen leak applies to a fuel cell system (10) comprising a fuel cell (12); a hydrogen supply system (30) comprising a reservoir (32) and the supply circuit (34) connecting the reservoir to the anode compartment (16) of the fuel cell and comprising an ejector (36) of venturi type; a recirculation circuit (60) for recirculating unconsumed hydrogen between the anode compartment of the fuel cell and the venturi-type ejector (36), the recirculation being sustained by the venturi-effect ejector. The method comprises steps involving calculating the total flow rate of hydrogen consumed; calculating the flowrate of hydrogen admitted to the injector; determining the leak rate as the difference between the flowrate of hydrogen admitted and the total flowrate of hydrogen consumed; and detecting a potential leak of hydrogen by comparing the leak rate against at least a threshold value, such that the method detects all of the hydrogen leaks that occur in the system downstream of the ejector.
H01M 8/04992 - Processes for controlling fuel cells or fuel cell systems characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence
G01R 31/36 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
12 - Land, air and water vehicles; parts of land vehicles
36 - Financial, insurance and real estate services
37 - Construction and mining; installation and repair services
39 - Transport, packaging, storage and travel services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Fuel cells; hydrogen cells; rechargeable batteries; fuel
cell systems and components for fuel batteries and cells. Hydrogen generators; compressed hydrogen fuel purification
systems comprised of separators intended for cleaning and
purifying gases. Vehicles; fuel-cell vehicles. Extended warranty insurance services; warranty insurance
services in the field of fuel cells and fuel cell vehicles. Installation, maintenance, repair, cleaning, installation or
maintenance services for hydrogen fuel cells, fuel cell
systems and components for fuel cells and batteries, fuel
cell vehicles, hydrogen refueling facilities and systems;
charging and refueling services for hydrogen fuel cells. Hydrogen storage and distribution services; information and
advice with respect to hydrogen storage and distribution. Engineering services for the construction of fuel cells and
fuel cell vehicles; Evaluations and assessments in the
fields of science and technology provided by engineers for
the construction of fuel cells and fuel cell vehicles;
research in the fields of science and technology for the
construction of fuel cells and fuel cell vehicles; Research
and development of new products for third parties for the
construction of fuel cells and fuel cell vehicles; Technical
project study for the construction of fuel cells and fuel
cell vehicles; Scientific and technological services as
well as the related research and design services for the
construction of fuel cells and fuel cell vehicles; Advice
in the areas of research, expertise and assistance in design
and development for the construction of fuel cells and fuel
cell vehicles.
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
36 - Financial, insurance and real estate services
37 - Construction and mining; installation and repair services
39 - Transport, packaging, storage and travel services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Fuel cells; hydrogen fuel cells; rechargeable batteries; fuel cell systems comprising fuel cells and batteries and components for fuel batteries and cells, namely, anodes, cathodes, fuel cells, electrodes Hydrogen generators; compressed hydrogen fuel purification systems comprised of separators intended for cleaning and purifying gases Extended warranty insurance services, namely, underwriting extended warranty contracts in the field of fuel cells and fuel cell vehicles; warranty insurance services, namely, providing extended warranties in the field of fuel cells and fuel cell vehicles Installation, maintenance, repair, and cleaning services for hydrogen fuel cells, fuel cell systems comprising electronic apparatus and components for fuel cells and batteries, fuel cell vehicles, hydrogen refueling facilities and systems comprising electronic apparatus and machinery; charging and refueling services for hydrogen fuel cells Hydrogen storage and distribution services; information and advice with respect to hydrogen storage and distribution Engineering services for the construction of fuel cells and fuel cell vehicles; engineering services, namely evaluations and assessments in the fields of science and technology provided by engineers for the construction of fuel cells and fuel cell vehicles; research in the fields of science and technology for the construction of fuel cells and fuel cell vehicles; Research and development of new products for third parties for the construction of fuel cells and fuel cell vehicles; Technical project study being engineering planning and design for the construction of fuel cells and fuel cell vehicles; Scientific and technological services, namely, research and design services for the construction of fuel cells and fuel cell vehicles; Advice in the areas of research, expertise being consulting and assistance in the nature of engineering advice, all for use in design and development for the construction of fuel cells and fuel cell vehicles; all of these services being excluded from the orthopedic field
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Fuel cells; hydrogen fuel cells; rechargeable batteries; fuel cell systems comprising fuel cells and batteries, and components for fuel batteries and cells, namely, anodes, cathodes, fuel cells and electrodes Vehicles, namely, land vehicles, railway rolling stock; water vehicles in the nature of boats, water scooters, ships, barges; air vehicles for transport; fuel-cell vehicles, namely, fuel-cell cars, fuel-cell trucks, fuel-cell vans, fuel-cell buses, fuel-cell trailers, fuel-cell passenger cars, fuel-cell tractors, fuel-cell railway rolling stock, fuel-cell marine vehicles in the nature of ships and submarines, fuel-cell forklift trucks
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
42 - Scientific, technological and industrial services, research and design
Goods & Services
Fuel cells; Hydrogen cells; Rechargeable cells; Fuel cell systems and components for batteries and fuel cells. Vehicles; fuel cell vehicles. Engineering for the construction of fuel cells and fuel cell vehicles; Evaluations and estimates in scientific and technological fields provided by engineers for the construction of fuel cells and fuel cell vehicles; Research in the scientific and technological fields for the construction of fuel cells and fuel cell vehicles; Research and development of new products for others for the construction of fuel cells and fuel cell vehicles; Technical project studies for the construction of fuel cells and fuel cell vehicles; Scientific and technological services and related research and design for the construction of fuel cells and fuel cell vehicles; Consultancy in research, expertise and design and development assistance for the construction of fuel cells and fuel cell vehicles.