CN115579484A - Fuel cell and electrode plate for fuel cell - Google Patents

Fuel cell and electrode plate for fuel cell Download PDF

Info

Publication number
CN115579484A
CN115579484A CN202211379593.8A CN202211379593A CN115579484A CN 115579484 A CN115579484 A CN 115579484A CN 202211379593 A CN202211379593 A CN 202211379593A CN 115579484 A CN115579484 A CN 115579484A
Authority
CN
China
Prior art keywords
plate
hole
module
substrate
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202211379593.8A
Other languages
Chinese (zh)
Other versions
CN115579484B (en
Inventor
方谋
孙敏敏
王志辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Shuojing New Energy Technology Co ltd
Original Assignee
Beijing Shuojing New Energy Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Shuojing New Energy Technology Co ltd filed Critical Beijing Shuojing New Energy Technology Co ltd
Priority to CN202211379593.8A priority Critical patent/CN115579484B/en
Publication of CN115579484A publication Critical patent/CN115579484A/en
Application granted granted Critical
Publication of CN115579484B publication Critical patent/CN115579484B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Fuel Cell (AREA)

Abstract

The application discloses a fuel cell and a polar plate thereof. There are at least two modules along the first direction array on the base plate of polar plate, every module includes: at least one distribution unit on the first surface of the substrate for supplying a first reactant to a membrane electrode assembly of the fuel cell; at least one first through hole, which is positioned at one side of the distribution unit and penetrates through the substrate, and is respectively connected with the distribution unit through the transverse opening on the side wall of the first through hole so as to flow in a first reactant; the first through hole and the second through hole are arranged opposite to each other on two sides of the distribution unit; wherein, be provided with the isolated arris between adjacent module to realize the independent sealed of every module. The fuel cell stack with multiple modules and capable of stably maintaining high power output for a long time is formed through unitization and modularization double expansion.

Description

Fuel cell and electrode plate for fuel cell
Technical Field
The present invention relates to a fuel cell, and more particularly, to a fuel cell and a plate for a fuel cell.
Background
A fuel cell is a power generation device that obtains electrical energy by electrochemically reacting a fuel such as methanol or hydrogen with an oxidizing gas in a catalyst layer of a membrane electrode assembly. The fuel cell includes a membrane electrode assembly and first and second electrode plates respectively located at opposite sides of the membrane electrode assembly. The membrane electrode assembly includes an electrolyte membrane, and a catalyst layer and a diffusion layer on both side surfaces of the electrolyte membrane. The first and second plates are used to deliver fuel gas and oxidizing gas, respectively, to the membrane electrode assembly.
The first surface of the first substrate is, for example, an anode face adjacent to the membrane electrode assembly, and the second surface is, for example, one of a cathode face, a cooling face, and a flat surface. The first surface of the second substrate is, for example, a cathode face adjacent to the membrane electrode assembly, and the second surface is, for example, one of an anode face, a cooling face, and a flat surface. And corresponding flow field structures are respectively formed on the anode surface, the cathode surface and the cooling surface and are used for uniformly distributing one of fuel gas, oxidizing gas and cooling medium.
During operation of the fuel cell, fuel gas and oxidant gas are respectively delivered to opposite surfaces of the mea through flow channels of the anode face of the flow field structure. The transfer process inside the membrane electrode assembly is diffusion of the fuel gas through the diffusion layer to the anode catalytic layer and diffusion of the oxidizing gas through the diffusion layer to the cathode catalytic layer. On the anode side of the membrane electrode assembly, the fuel gas emits electrons to form cations under the action of the catalyst layer catalyst. Electrons are transferred from the catalyst surface through the diffusion layer to the first plate, from the first plate to an external circuit, and from the external circuit to the second plate. The cations are transferred to the cathode catalyst layer via the electrolyte membrane. On the cathode side of the mea, electrons pass from the second plate to the diffusion layer, from where they pass to the cathode catalyst layer. The oxidizing gas combines with the electrons transferred from the anode on the cathode catalyst layer to form anions, which combine with the cations transferred through the electrolyte membrane to form water, thereby forming a complete electronic circuit and ionic circuit. The electrolyte membrane serves as both an ion channel and a barrier to gas and electrons.
The plate structure of a fuel cell has a significant influence on the electrochemical performance and output power of the fuel cell. With the development of the technology, fuel cells gradually enter the fields of heavy commercial vehicles, ships, energy storage and the like, and show great market potential, so that more urgent requirements are put forward on high-power fuel cell stacks.
The power of the existing fuel cell single stack in the industry is the most common in 80-150kw level, but for a higher-power fuel cell system, a plurality of cell stacks are usually required to be combined in series to realize higher-power output, but the multi-stack combination mode is complex, and the over-high requirements are provided for the aspects of system integration, insulation, heat dissipation and the like during operation; meanwhile, the complex control system also reduces the effective available power of the power generation system, and greatly reduces the efficiency of the power generation system.
Therefore, there is a need in the industry for better solutions to improve the electrochemical performance and the single stack power of fuel cells using improved plate structures.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a fuel cell and a plate for the fuel cell, which are subjected to a cell expansion and a modular expansion in different directions of the plate to form a plurality of modules sealed to be isolated from each other, and a fuel cell stack having the plurality of modules, which can stably maintain a high power output for a long time.
According to a first aspect of the present invention, there is provided a plate for a fuel cell having at least two modules arranged in a first direction array on a substrate of the plate, each module comprising: at least one distribution unit on the first surface of the substrate for supplying a first reactant to a membrane electrode assembly of a fuel cell; at least one first through hole, which is positioned at one side of the distribution unit, penetrates through the substrate, and is respectively connected with the corresponding distribution unit through the transverse opening on the side wall of the first through hole so as to flow a first reactant; the first through hole and the second through hole are arranged oppositely on two sides of the distribution unit; wherein, be provided with the isolated arris between adjacent module to realize the independent sealed of every module.
Preferably, each module includes a plurality of distribution units arranged in an array along a second direction on the substrate, the second direction being perpendicular to the first direction.
Preferably, a border sealing area is provided between adjacent modules, the width of the border sealing area being smaller than the width of the sealing area at the edge of the substrate.
Preferably, the width of the adjacent sealing zone is from 2mm to 15mm.
Preferably, each module further comprises: at least one third through hole penetrating through the substrate for flowing a second reactant; at least one fourth through hole penetrating through the substrate for flowing out a second reactant; wherein the at least one third through-hole and the at least one fourth through-hole are located at both sides of the dispensing unit, respectively.
Preferably, each module further comprises: at least one fifth through hole penetrating the substrate for flowing a cooling medium; at least one sixth through hole penetrating through the substrate and used for flowing out a cooling medium; wherein the at least one fifth through-hole and the at least one sixth through-hole are located at both sides of the dispensing unit, respectively.
Preferably, each module further comprises: and the at least one cooling unit is positioned on the second surface of the substrate, is connected with the at least one fifth through hole and the at least one sixth through hole, and is used for supplying a cooling medium to the second surface of the substrate.
Preferably, the at least one first through-going hole, the at least one fourth through-going hole and the at least one sixth through-going hole are all located on the same side of the dispensing unit, and the at least one second through-going hole, the at least one third through-going hole and the at least one fifth through-going hole are all located on the other side of the dispensing unit.
Preferably, the at least one first through-hole, the at least one fourth through-hole and the at least one sixth through-hole are aligned in the order of fourth through-hole, sixth through-hole, first through-hole on the same side of the dispensing unit, and the at least one second through-hole, the at least one third through-hole and the at least one fifth through-hole are aligned in the order of second through-hole, third through-hole, fifth through-hole on the other side of the dispensing unit.
Preferably, the polar plate is a dual-module polar plate, a first module and a second module are arranged on a substrate of the polar plate along a first direction array, the first module is adjacent to the second module, a first isolation ridge is arranged between the first module and the second module, and a second through hole, a third through hole and a fifth through hole of the first module and the second module are arranged adjacent to the first isolation ridge.
Preferably, the first reactant is fuel gas, the second reactant is oxidizing gas, the oxidizing gas and the cooling medium flow into two sides of the double-module plate from the middle, and the fuel gas flows into the middle of the double-module plate from two sides.
Preferably, the at least one allocation unit includes: a first flow field structure comprising a plurality of first flow channels separated from one another by a plurality of ridges, the plurality of first flow channels extending from an inlet side of the first flow field structure to an outlet side of the first flow field structure; the first flow guide structure comprises a plurality of first flow guide grooves which are separated from each other by a plurality of first side walls, and the first flow guide grooves are distributed in a radial shape and extend from the transverse openings of the corresponding first through holes to the inlet side of the first flow field structure; and the second flow guide structure comprises a plurality of second flow guide grooves with a plurality of second side walls separated from each other, and the plurality of second flow guide grooves are distributed in a radial shape and extend from the transverse openings of the corresponding second through holes to the outlet side of the first flow field structure.
Preferably, the plurality of flow channels of the first flow field structure are any one of linear flow channels, curved flow channels and serpentine flow channels.
According to a second aspect of the present invention, there is provided a fuel cell comprising: at least one repeating component comprising a first plate comprising an anode face in contact with the membrane electrode assembly to distribute fuel gas, a second plate comprising a cathode face in contact with the membrane electrode assembly to distribute oxidizing gas, and a membrane electrode assembly sandwiched therebetween; and a clamping device including a first end plate, a second end plate, and a connecting member for connecting the first end plate and the second end plate, for fixing the at least one repeating member in a stacked state between mutually opposing support surfaces of the first end plate and the second end plate, wherein the first pole plate is the pole plate described above.
According to a third aspect of the present invention, there is provided a fuel cell comprising: at least one repeating component comprising a first plate, a first membrane electrode assembly, a common plate, a second membrane electrode assembly, a second plate, the first membrane electrode assembly being positioned between the first plate and the common plate, the second membrane electrode assembly being positioned between the second plate and the common plate, the first plate comprising an anode face in contact with the first membrane electrode assembly to distribute fuel gas, the common plate comprising a cathode face in contact with the first membrane electrode assembly to distribute oxidizing gas, the common plate further comprising an anode face in contact with the second membrane electrode assembly to distribute fuel gas, the second plate comprising a cathode face in contact with the second membrane electrode assembly to distribute oxidizing gas; and a clamping device including a first end plate, a second end plate, and a connecting member for connecting the first end plate and the second end plate, for fixing the at least one repeating member in a stacked state between support surfaces of the first end plate and the second end plate facing each other, wherein the first electrode plate is any one of the above-described electrode plates.
The polar plate simultaneously adopts a unitized and modular double expansion mode, is subjected to unitized expansion in the Y-axis direction and modular expansion in the X-axis direction, can be selectively expanded into a double module, a triple module or a multi-module with more than three modules according to power requirements, is flexible in expansion, and provides feasibility for realizing hectowatt-level, kilowatt-level high-power or ultrahigh-power electric piles. An isolation edge is arranged between the adjacent modules, furthermore, the adjacent modules share a middle adjacent sealing area, and the width of the adjacent sealing area is not more than that of the edge sealing area, so that on one hand, the area of the polar plate sealing area can be reduced, and the active reaction area of the polar plate is increased by 5-12%, thereby improving the power density of the pile; meanwhile, the module is independently sealed by the isolating edge in the middle of the adjacent sealing area, so that the sealing pressure of large-area polar plates can be reduced, the sealing performance of fluid between the polar plates of the battery is improved, and the risk of fluid leakage is reduced.
Furthermore, the through holes of the cooling medium in each unit are positioned between the through holes of the fuel gas and the oxidizing gas, and the design can effectively improve the area utilization rate of the polar plate; and according to the number of the modules in the polar plate, a corresponding flow distribution mode can be set. For a double-module polar plate or a multi-module polar plate, two adjacent modules can be used as a group, and a flow distribution mode of inputting oxidizing gas and cooling medium in the middle and outputting the oxidizing gas and the cooling medium in the two sides and inputting fuel gas in the middle and outputting the fuel gas in the two sides is adopted, so that the mass transfer capacity and the utilization rate of the fuel gas are improved, the air inlet pressure resistance and the permeability of the oxidizing gas are reduced, the large-current continuous discharge capacity of the electric pile is enhanced, and the high-power output stability of the electric pile is enhanced.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 shows a plan view of a first surface of a first plate in a fuel cell according to an embodiment of the invention;
FIG. 2 is a partially enlarged schematic view of a first plate individual distribution unit in a fuel cell according to an embodiment of the present invention;
fig. 3 shows a plan view of a second surface of a first plate in a fuel cell according to an embodiment of the invention;
fig. 4 shows a plan view of a first surface of a second plate in a fuel cell according to an embodiment of the invention;
FIG. 5 is a schematic diagram showing the directions of flow of fluids in a plate in a fuel cell according to an embodiment of the present invention;
FIG. 6 shows a schematic cross-sectional view of a first repeating component of a fuel cell according to an embodiment of the invention;
fig. 7 shows a schematic cross-sectional view of a second repeating component of a fuel cell according to an embodiment of the invention;
fig. 8 is a schematic perspective view showing a clamping device for a fuel cell according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a plan view showing a first surface of a first electrode plate in a fuel cell according to an embodiment of the present invention, and it can be seen that the first electrode plate 100 includes a substrate 10, the substrate 10 having a substantially rectangular shape including first and second sides extending in an X direction and facing each other, and third and fourth sides extending in a Y direction and facing each other, the substrate 10 being provided with first and second modules 1 and 2 in an array in the X direction, and a barrier rib 3 being provided between the first and second modules 1 and 2 to achieve individual sealing of each module. Further, the first to fourth sides of the substrate 10 are each provided with an edge sealing region, and between adjacent modules of the substrate 100, a region where the barrier rib 3 is located is provided with an adjoining sealing region having a width D not greater than the width D of the edge sealing region, specifically, the width D of the adjoining sealing region is, for example, 2mm to 15mm.
The substrate 10 is further provided with a tab 4, and the tab 4 is located on the first side of the substrate 100, for example, and is close to an included angle between the first side and the fourth side of the substrate 100. The tab 4 as a conductive terminal can also be connected with the detection equipment. Preferably, the tab 4 further includes a positioning groove and/or a coupling hole for positioning and coupling at the time of stack assembly.
Removing the tab 4, and mirroring the first module 1 on the substrate 10 with the isolation rib 3 as a symmetric plane to obtain the second module 2 on the substrate 10, where the second module 2 and the first module 1 are mirrored with the isolation rib 3 as a symmetric plane, so that only the first module 1 is selected for detailed description, and the similar structure in the second module 2 is not described again.
The first module 1 includes a plurality of distribution units 120 arranged in an array along the Y direction (extending direction of the third side and the fourth side), and each of the distribution units 120 further includes a set of through holes corresponding to the distribution unit 120, in the embodiment shown in fig. 1, the first electrode plate 100 is, for example, an anode plate, the first plane thereof is an anode plane, the substrate 10 thereof has functions of dispersing fuel gas and conducting electrons, and may be made of a material with high mechanical strength and excellent conductivity, such as graphite, stainless steel, titanium alloy, aluminum alloy, copper alloy, and the like. The first module 1 comprises, for example, 5 distribution units 120, each having a width H of, for example, 15-100mm; a first through hole 111 is formed in one side, close to the third side, of the distribution unit 120, and a second through hole 112 is formed in one side, close to the isolation ridge 3, of the distribution unit 120; the fuel gas is connected to the corresponding distribution unit 120, for example, through a lateral opening in the sidewall of the first penetration hole 111, to flow in the fuel gas; the fuel gas flows through the distribution unit 120 and then flows out from the lateral opening of the sidewall of the second through hole 112 to the second through hole 112.
Fig. 2 is a partially enlarged schematic view of a region a in which a single distribution unit is located in fig. 1, and by enlarging the single distribution unit to better show the specific structure of the single distribution unit, as shown in fig. 2, a plurality of sets of through holes arranged in a row along the Y direction are formed on one side (close to the third side) of the distribution unit, and each set of through holes includes a fourth through hole 114, a sixth through hole 116 and a first through hole 111 which are sequentially arranged. A plurality of sets of through-holes aligned in the Y direction are also formed on the other side (near the barrier ribs 3) of the distribution unit, each set of through-holes including a second through-hole 112, a fifth through-hole 115, and a third through-hole 113 arranged in this order, wherein the first through-hole 111 and the second through-hole 112 are used for, for example, inflow and outflow of the first reactant, respectively, the third through-hole 113 and the fourth through-hole 114 are used for, for example, inflow and outflow of the second reactant, respectively, and the fifth through-hole 115 and the sixth through-hole 116 are used for, for example, inflow and outflow of the cooling medium, respectively. Specifically, the first reactant is, for example, a fuel gas, and the second reactant is, for example, an oxidizing gas, and the arrangement order is such that the fifth through-hole 115 and the sixth through-hole 116 for flowing the cooling medium are both located between the through-holes for flowing the fuel gas and the oxidizing gas, and heat exchange is performed in the areas of the through-holes to adjust the temperature of the fuel cell.
The distribution unit 120 includes a first flow guiding structure 121, a first flow field structure 123 and a second flow guiding structure 122, wherein the first flow guiding structure 121 is located between the transverse opening of the first through hole 111 and the inlet of the first flow field structure 123, the first flow guiding structure 121 has, for example, radial flow channels, which gradually diverge from the direction from the first through hole 111 to the inlet of the first flow field structure 123, and the flow channels of the first flow guiding structure 121 correspond to the flow channels of the first flow field structure 123; the second flow guiding structure 122 has, for example, the same radial flow channels, and the second flow guiding structure 122 gradually diverges from the second through hole 112 to the direction of the outlet of the first flow field structure 123; the second flow guiding structure 122 is located between the transverse opening of the second through hole 112 and the outlet of the first flow field structure 123.
The first flow field structure 123 includes a plurality of flow channels extending from an inlet to an outlet, the plurality of flow channels being separated from each other by a ridge, the first flow field structure 123 having a width W of, for example, 30mm to 200mm, the ridge having a width of, for example, 0.05mm to 0.5mm, each flow channel having a width of, for example, 0.02mm to 0.4mm, and the flow channels having a depth of, for example, 0.03mm to 0.5mm, the flow channels in the first flow field structure 123 may be of various designs such as straight, curved, or serpentine flow channels, and in the embodiment shown in fig. 2, serpentine flow channels extending in the X direction and the Y direction are used. Preferably, the serpentine flow channel design is adopted to increase the length of the flow path of the fuel gas, so that the pressure resistance of the fuel gas passing through the flow field is increased, the distribution of the fuel gas in the flow channel is more uniform, the moisture retention capability of the fuel gas is enhanced, the concentration of the fuel gas in the plane direction can be increased, the reaction is more sufficient, the energy loss of the reaction is reduced, and the utilization rate of the fuel gas is improved.
Fig. 3 shows a plan view of a second surface of the first plate, which is opposite to the first surface, such as a cooling surface, in the fuel cell according to the embodiment of the present invention, and which is similar to the first surface and also has a plurality of cooling units corresponding to the first surface, taking as an example the one of the cooling units of the first module 1 closest to the fourth side in fig. 3, the cooling unit including: a third flow directing structure 131, a cooling flow field structure 133 and a fourth flow directing structure 132. The third flow guiding structure 131 is located between the transverse opening of the fifth through hole 115 and the inlet of the cooling flow field structure 133, the fourth flow guiding structure 132 is located between the transverse opening of the sixth through hole 116 and the outlet of the cooling flow field structure 133, both the third flow guiding structure 131 and the fourth flow guiding structure 132 correspond to flow channels in the cooling flow field structure 133, the cooling flow field structure 144 adopts a curved flow channel design, and includes a first portion extending along the transverse direction (X-axis direction) and a second portion extending along the longitudinal direction (Y-axis direction), and the curved flow channel design can increase the length of a flow path of a cooling medium, reduce the flow speed of the cooling medium, increase the heat transfer efficiency, improve the cooling effect, and provide a good heat dissipation flow field for the first plate, specifically, the ridge width in the cooling flow field structure 133 is 0.1mm to 2mm, the groove width is 0.1mm to 2mm, and the groove depth is 0.03mm to 0.5mm.
Fig. 4 shows a plan view of a first surface of a second plate in a fuel cell according to an embodiment of the invention; the second plate is, for example, a cathode plate, and is matched with the first plate, the second plate 200 includes a substrate 20, first modules 1 and second modules 2 are arranged in a same array in a transverse direction of the substrate 20, and a separation rib 3 is also arranged between the first modules 1 and the second modules 2 to realize individual sealing of each module. The isolation ribs 3 and the sealing regions on the substrate 20 correspond to those of the first plate 100, and the size and position thereof are not described in detail herein. One side of the substrate 20 is provided with a tab 4, and a first surface of the second plate 200 is opposite to a first surface of the first plate 100, that is, the first module 1 of the second plate 200 is opposite to the second module of the first plate 100, and the second module 2 of the second plate 200 is opposite to the first module of the first plate 100. Taking the first module 1 of the second plate 200 as an example, 5 distribution units are also arranged in an array along the Y direction, and the width of each distribution unit is, for example, 15mm to 100mm; three sets of through-holes are also provided on the left and right sides of each distribution unit, wherein a first through-hole 111 and a second through-hole 112 are used for inflow and outflow of fuel gas, respectively, for example, a third through-hole 113 and a fourth through-hole 114 are used for inflow and outflow of oxidizing gas, respectively, for example, and a fifth through-hole 115 and a sixth through-hole 116 are used for inflow and outflow of cooling medium, respectively, for example.
The oxidizing gas flows into the second flow field structure 143 through the fifth flow guiding structure 141 and the lateral opening on the sidewall of the third through hole 113, for example; the oxidizing gas flows through the second flow field structure 143 and then flows out from the lateral opening on the sidewall of the fourth through hole 114 to the fourth through hole 114 through the sixth flow guide structure 142. The fifth flow guiding structure 141 has, for example, radial flow channels, which gradually diverge from the third through hole 113 to the inlet of the second flow field structure 143, and the fifth flow guiding structure 141 corresponds to the flow channels of the second flow field structure 143; the sixth flow guiding structure 142 has, for example, the same radial flow path design, and the sixth flow guiding structure 142 gradually diverges from the fourth through hole 114 toward the outlet of the second flow field structure 143.
The second flow field structure 143 comprises, for example, a plurality of flow channels extending from an inlet to an outlet, the plurality of flow channels being separated from each other by ridges, the second flow field structure 143 preferably being linear flow channels, the second flow field structure 143 having a width of 30mm to 200mm, a ridge width of 0.02mm to 0.4mm, a groove width of 0.05mm to 0.5mm, and a groove depth of 0.03mm to 0.5mm. The design of the second flow field structure 143 is beneficial to reducing the pressure resistance of the cathode surface (first surface) of the second electrode plate 200, and is beneficial to discharging the generated water, thereby reducing the flooding phenomenon of the galvanic pile and improving the large-current stable discharge capability of the galvanic pile.
The second surface of the second plate 200 is similar to the second surface of the first plate 100, and is also a cooling surface, and the same cooling surface design can be adopted, which is not described herein again.
FIG. 5 is a schematic diagram showing the directions of flow of fluids in a plate in a fuel cell according to an embodiment of the present invention; taking a dual-module plate having two modules, i.e., a first module 1 and a second module 2, as an example, the flow directions of the fuel gas, the oxidizing gas, and the cooling medium are respectively indicated by solid arrows, dashed arrows, and dotted arrows in fig. 5, and it can be seen from fig. 5 that the fuel gas flows in through the first through-holes 111 and flows out through the second through-holes 112 in the first module 1, i.e., flows from the side of the plate to the barrier ribs 3; the oxidizing gas flows in through the third through-hole 113 and flows out through the fourth through-hole 114; the cooling medium flows in through the fifth through-holes 115 and flows out through the sixth through-holes 116; i.e. the oxidizing gas and the cooling medium flow from the barrier ribs 3 to the sides of the plates. In the second module 2, similar to the first module 1, the fuel gas flows in through the first through holes 211 and flows out through the second through holes 212, namely flows from the side edge of the polar plate to the isolation rib 3; the oxidizing gas flows in through the third through-holes 213 and flows out through the fourth through-holes 214; the cooling medium flows in through the fifth through-hole 215 and flows out through the sixth through-hole 216; i.e. the oxidizing gas and the cooling medium flow from the barrier ribs 3 to the side of the plates. In the double-module polar plate, the oxidizing gas and the cooling medium are input from the middle and output from two sides, and the fuel gas is input from two sides and output from the middle in a flow distribution mode, so that the mass transfer capacity and the utilization rate of the fuel gas are improved, the air inlet pressure resistance and the air permeability of the oxidizing gas are reduced, the large-current continuous discharge capacity of the electric pile can be obviously enhanced, and the operation stability of the electric pile is improved.
Of course, although fig. 5 only shows the flow distribution design of the dual-module plate, the plate having more than two modules may be grouped according to the dual modules, and similar flow distribution designs are adopted, and the material flow directions between adjacent modules are mirror images each other with the isolation edge as a symmetric surface, and also have similar technical effects.
FIG. 6 shows a schematic cross-sectional view of a first repeating component of a fuel cell according to an embodiment of the invention; the first repeating member includes a first electrode plate 100 and a second electrode plate 200, the first electrode plate 100 and the second electrode plate 200 being spaced apart from each other with first surfaces thereof facing each other with a membrane electrode assembly 300 interposed therebetween; the three are stacked in the longitudinal direction such that each penetration hole forms a corresponding plurality of sets of main lines 110 in the longitudinal direction to transport the fuel gas, the oxidizing gas, and the cooling medium, respectively. The adjacent sides of the first polar plate 100 and the second polar plate 200 in the first module 1 and the second module 2 are respectively provided with an isolation edge 3 to isolate the two modules, so that the two modules can realize independent sealing, and the sealing performance of a main pipeline near the adjacent areas is enhanced.
The membrane electrode assembly 300 includes an electrolyte membrane 31, and an anode catalyst layer 32, an anode diffusion layer 34 stacked in this order on a first surface (fuel gas side) of the electrolyte membrane 31; a cathode catalyst layer 33 and a cathode diffusion layer 35 are stacked in this order on the second surface (the oxidizing gas side) of the electrolyte membrane 31; and a border 36 surrounding each layer in the non-reactive region.
The electrolyte membrane 31 is a selectively permeable membrane that transports protons and has a function of insulating electrons. The electrolyte membrane 31 is roughly classified into a fluorine-based electrolyte membrane and a hydrocarbon-based electrolyte membrane depending on the kind of the ion exchange resin as the constituent material. Among them, the fluorine-based electrolyte membrane has excellent heat resistance and chemical stability because it has a C — F bond. For example, as the electrolyte membrane, a perfluorosulfonic acid membrane known under the trade name Nafion (registered trademark, dupont co., ltd.) is widely used.
The anode catalyst layer 32 contains an electrode catalyst supporting a catalyst component and a polymer. The electrode catalyst has a function of promoting a reaction (hydrogen-oxygen reaction) of dissociating hydrogen into protons and electrons. The electrode catalyst has a structure in which a catalyst component such as platinum is supported on the surface of a conductive carrier made of carbon or the like, for example.
The cathode catalyst layer 33 contains an electrode catalyst supporting a catalyst component and a polymer. The electrode catalyst has a function of promoting a reaction (oxygen reduction reaction) of generating water from protons, electrons, and oxygen. The electrode catalyst has a structure in which a catalyst component such as platinum is supported on the surface of a conductive carrier made of carbon or the like, for example.
The anode diffusion layer 34 and the cathode diffusion layer 35 are respectively composed of porous and loose conductive materials, such as porous carbon paper materials, and the anode diffusion layer 34 and the cathode diffusion layer 35 uniformly diffuse fuel gas and oxidizing gas from the flow channels of the flow field onto the two side surfaces of the catalytic layer of the electrolyte membrane 31, respectively, so that the fuel gas and the oxidizing gas are in contact with the anode catalyst layer 32 and the cathode catalyst layer 33, respectively.
The first surface of the first plate 100 is in contact with the anode diffusion layer 34 in the membrane electrode assembly 300, and a fuel gas flow field is formed in the first surface.
The fuel gas flow field includes a plurality of first flow field structures 123 connected to the first group of main manifolds and extending laterally, the flow field structures of the first plate 100 are open on the first surface, and the fuel gas is transferred in the direction of the first flow field structures 123 and delivered to the anode side of the membrane electrode assembly 300.
The first surface of the second plate 200 is in contact with the cathode diffusion layer 35 in the membrane electrode assembly 300, and an oxidizing gas flow field is formed in the first surface. The oxidizing gas flow field includes a plurality of second flow field structures 223 connected to the second group of main manifolds and extending laterally, the second flow field structures 223 of the second plate 200 are open on the first surface, and the oxidizing gas is transferred in the direction of the second flow field structures 223 and delivered to the cathode side of the membrane electrode assembly 300.
On the anode side of the membrane electrode assembly 300, the fuel gas diffuses to the anode catalyst layer 32 through the anode diffusion layer 34 of the membrane electrode assembly 300, the fuel gas generates cations and electrons through an electrochemical reaction on the anode catalyst layer 32 of the membrane electrode assembly 300, the cations migrate to the cathode side via the electrolyte membrane, and the electrons are conducted to the first electrode plate 100 via the anode diffusion layer 34. The electrons then pass from the anode side to the cathode side of the membrane electrode assembly 300 via an external circuit. On the cathode side of the membrane electrode assembly 300, the electrons are conducted to the cathode diffusion layer 35 via the second electrode plate 200 and then conducted to the cathode catalyst layer 33 of the membrane electrode assembly 300, the oxidizing gas is diffused to the cathode catalyst layer 33 through the cathode diffusion layer 35 of the membrane electrode assembly 300, the oxidizing gas is combined with the electrons to form anions, which are combined with the cations transferred through the electrolyte membrane to form water, thereby forming a current loop.
In the electrochemical reaction, water is generated by a chemical reaction generated on the surface of the cathode catalyst layer of the membrane electrode assembly 300. Further, on the cathode side of the mea 300, the water produced by the reaction needs to be carried out of the active area by the advancing oxidizing gas through the flow channels of the second plate 200, due to the close contact of the ridges in the cathode plate flow field structure. If the generated water is not discharged in time and is accumulated in the active region, water droplets are formed, which hinder the contact of the oxidizing gas with the cathode catalyst layer, and thus the cathode catalyst layer submerged by the water droplets cannot perform an electrochemical reaction, thereby generating a phenomenon known as "flooding". On the anode side of the membrane electrode assembly 300, there is water that diffuses through reverse osmosis through the electrolyte membrane, and thus a "flooding" phenomenon may also occur. The occurrence of the flooding phenomenon affects the progress of the electrochemical reaction, thereby reducing the discharge performance of the fuel cell. For a fuel cell, the larger the discharge current is, the more water is generated by the reaction, the more easily a "flooding" phenomenon is generated, and the more remarkably the discharge performance of the cell is affected.
Further, the second surfaces of the first plate 100 and the second plate 200 are both cooling surfaces, for example, the second surface of the first plate 100 is provided with a cooling flow field structure 133, and the second surface of the second plate 200 is provided with a cooling flow field structure 223. In order to enhance the sealing between the plates and the membrane electrode assembly 300, sealing frames 40 are further provided on the first and second surfaces of the plates.
Fig. 7 shows a schematic cross-sectional view of a second repeating component of a fuel cell according to an embodiment of the invention; the second repeating component is, for example, a dual-core design, and the main structure of the second repeating component comprises, from top to bottom, a second electrode plate, a second membrane electrode assembly 320, a common electrode plate 400, a first membrane electrode assembly 310, and a first electrode plate 100; the second repeating part further provides a common electrode plate 400 between the first electrode plate 100 and the second electrode plate 200, the side of the common electrode plate 400 facing the first electrode plate 100 is, for example, a cathode surface, the same design as the first surface of the second electrode plate 200 is adopted, and a first membrane electrode assembly 310 is provided between the common electrode plate 400 and the first electrode plate 100; the side of the common electrode plate 400 facing the second electrode plate 200 is, for example, an anode surface, and the same design as the first surface of the first electrode plate 100 is adopted, and the second membrane electrode assembly 320 is disposed between the common electrode plate 400 and the second electrode plate 200. That is, the common plate 400 is designed without a cooling surface, and the cooling surface of the second repeating member is located only on the second surfaces of the outermost first and second plates 100 and 200.
Fig. 8 is a schematic perspective view showing a clamping device for a fuel cell according to an embodiment of the present invention. Specifically, the fuel cell clamping device is used to fix a plurality of repeating parts (repeat parts) stacked together. The clamping device includes first and second end plates 60 and 70 opposite to each other, and a connecting member 50 connecting opposite side edges of the first and second end plates 60 and 70 together.
The connecting member 50 serves to connect the first and second end plates 60 and 70 together, and by adjusting the distance therebetween, the first and second end plates 60 and 70 apply pressure to the repetitive member therebetween. The connecting member 50 includes, for example, a plurality of connecting rods or an integral connecting plate. One end of the connecting member 50 is fixed to the first end plate 60, and the other end of the connecting member 50 is formed with a screw hole or a bolt for coupling with the second end plate 70.
The first end plate 60 serves as a flow distribution device for the fuel gas, the oxidizing gas, and the cooling medium. The fuel gas includes gaseous hydrogen, or liquid methanol or a liquid fuel such as methanol solution. The oxidizing gas may be air or pure oxygen, and the cooling medium may be liquid or gas.
A plurality of pipe ports 61 for connecting external pipes are formed in an end surface of the first end plate 60, and a plurality of distribution holes 62 for connecting repetitive parts are formed in a support surface of the first end plate 60. The piping port 61 includes respective inflow and outflow ports of the fuel gas, the oxidizing gas, and the cooling medium. The distribution holes 62 include respective sets of inflow holes and respective sets of outflow holes for the fuel gas, the oxidizing gas, and the cooling medium. Preferably, the pipeline ports 61 are divided into a plurality of groups, each module corresponds to a group of pipeline ports, and the flow of fluid in different modules is adjusted through the flow control of the pipeline ports 61 from the outside.
An internal pipe is formed inside the first end plate 60. The inflow port of the fuel gas communicates with the corresponding set of inflow holes via an internal pipe, and the outflow port communicates with the corresponding set of outflow holes via an internal pipe, so that the first end plate 60 supplies the fuel gas to the electrode plates in the repeating member via the distribution holes 62. The inflow ports of the oxidizing gas communicate with the corresponding set of inflow holes via the internal piping, and the outflow ports communicate with the corresponding set of outflow holes via the internal piping, so that the first end plate 60 supplies the oxidizing gas to the plates in the repeating unit via the distribution holes 62. The inflow ports of the cooling medium communicate with the corresponding set of inflow holes via the internal piping, and the outflow ports communicate with the corresponding set of outflow holes via the internal piping, so that the first end plate 60 can supply the cooling medium to the electrode plates (or cooling plates) in the repeating unit via the distribution holes 62 on the support surface.
Between the first end plate 60 and the second end plate 70, 100-450 first repeating parts or second repeating parts may be disposed to form a fuel cell stack having a power rating of 100-400 kW.
The polar plate simultaneously adopts a unitized and modular double expansion mode, is subjected to unitized expansion in the Y-axis direction and modular expansion in the X-axis direction, can be selectively expanded into a double module, a triple module or a multi-module with more than three modules according to power requirements, is flexible in expansion, and provides feasibility for realizing hectowatt-level, kilowatt-level high-power or ultrahigh-power electric piles. An isolation edge is arranged between the adjacent modules, furthermore, the adjacent modules share a middle adjacent sealing area, and the width of the adjacent sealing area is not more than that of the edge sealing area, so that on one hand, the area of the polar plate sealing area can be reduced, and the active reaction area of the polar plate is increased by 5-12%, thereby improving the power density of the pile; meanwhile, the module is independently sealed by the isolating edge in the middle of the adjacent sealing area, so that the sealing pressure of large-area polar plates can be reduced, the sealing performance of fluid between the battery polar plates is improved, and the risk of fluid leakage is reduced.
Furthermore, the through holes of the cooling medium in each unit are positioned between the through holes of the fuel gas and the oxidizing gas, and the design can effectively improve the area utilization rate of the polar plate; and according to the number of the modules in the polar plate, a corresponding flow distribution mode can be set. For a double-module polar plate or a multi-module polar plate, two adjacent modules can be used as a group, and a flow distribution mode of inputting oxidizing gas and cooling medium in the middle and outputting the oxidizing gas and the cooling medium in the two sides and inputting fuel gas in the middle and outputting the fuel gas in the two sides is adopted, so that the mass transfer capacity and the utilization rate of the fuel gas are improved, the air inlet pressure resistance and the permeability of the oxidizing gas are reduced, the large-current continuous discharge capacity of the electric pile is enhanced, and the high-power output stability of the electric pile is enhanced.
It should be noted that in the description of the present invention, the contained terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above-mentioned embodiments are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And need not be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.

Claims (15)

1. An anode plate for a fuel cell comprising at least two modules arrayed in a first direction on a substrate of the anode plate, the substrate having an edge seal zone at an edge thereof and a contiguous seal zone between adjacent modules, the contiguous seal zone having a spacer rib disposed therein to space adjacent modules apart to effect individual sealing of each module.
2. The plate of claim 1, each module comprising:
at least one distribution unit on the first surface of the substrate for supplying a first reactant to a membrane electrode assembly of a fuel cell;
at least one first through hole, which is positioned at one side of the distribution unit, penetrates through the substrate, and is respectively connected with the corresponding distribution unit through the transverse opening on the side wall of the first through hole so as to flow a first reactant; and
at least one second through hole positioned on the other side of the distribution unit and penetrating through the substrate, and respectively connected with the corresponding distribution unit through a transverse opening on the side wall of the second through hole so as to flow out a first reactant, wherein the first through hole and the second through hole are arranged opposite to each other on two sides of the distribution unit;
wherein each module includes a plurality of dispensing units arranged in an array along a second direction on the substrate, the second direction being perpendicular to the first direction.
3. The plate of claim 1, wherein the width of the adjacent seal region is less than the width of the seal region at the edge of the substrate.
4. A plate as claimed in claim 3, wherein the width of the adjacent sealing zone is from 2mm to 15mm.
5. The plate of claim 1, wherein each module further comprises:
at least one third through hole penetrating through the substrate for flowing a second reactant;
at least one fourth through hole penetrating through the substrate for flowing out a second reactant;
wherein the at least one third through-hole and the at least one fourth through-hole are located at both sides of the dispensing unit, respectively.
6. The plate of claim 5, wherein each module further comprises:
at least one fifth through hole penetrating the substrate for flowing a cooling medium;
at least one sixth through hole penetrating through the substrate and used for flowing out a cooling medium;
wherein the at least one fifth through-hole and the at least one sixth through-hole are located at both sides of the dispensing unit, respectively.
7. The plate of claim 6, wherein each module further comprises: and the at least one cooling unit is positioned on the second surface of the substrate, is connected with the at least one fifth through hole and the at least one sixth through hole, and is used for supplying a cooling medium to the second surface of the substrate.
8. The plate according to claim 6, wherein said at least one first through hole, said at least one fourth through hole and said at least one sixth through hole are all located on the same side of said distribution unit, and said at least one second through hole, said at least one third through hole and said at least one fifth through hole are all located on the other side of said distribution unit.
9. The plate according to claim 8, wherein the at least one first through-hole, the at least one fourth through-hole and the at least one sixth through-hole are aligned in the order of the fourth through-hole, the sixth through-hole, and the first through-hole on the same side of the distribution unit, and the at least one second through-hole, the at least one third through-hole, and the at least one fifth through-hole are aligned in the order of the second through-hole, the third through-hole, and the fifth through-hole on the other side of the distribution unit.
10. The plate of claim 9, wherein the plate is a dual module plate, wherein a first module and a second module are arranged on a substrate of the plate along a first direction array, the first module is adjacent to the second module, a first isolation rib is arranged between the first module and the second module, and the second through hole, the third through hole and the fifth through hole of the first module and the second module are arranged adjacent to the first isolation rib.
11. The plate of claim 10, wherein the first reactant is a fuel gas and the second reactant is an oxidizing gas, the oxidizing gas and the cooling medium flow out of the middle inflow side of the dual module plate and the fuel gas flows out of the middle inflow side of the dual module plate.
12. The plate of claim 1, wherein the at least one dispensing unit comprises:
a first flow field structure comprising a plurality of first flow channels separated from one another by a plurality of ridges, the plurality of first flow channels extending from an inlet side of the first flow field structure to an outlet side of the first flow field structure;
the first flow guide structure comprises a plurality of first flow guide grooves which are separated from each other by a plurality of first side walls, and the first flow guide grooves are distributed in a radial shape and extend from the transverse openings of the corresponding first through holes to the inlet side of the first flow field structure; and
and the second flow guide structure comprises a plurality of second flow guide grooves with a plurality of second side walls separated from each other, and the plurality of second flow guide grooves are distributed in a radial shape and extend from the transverse openings of the corresponding second through holes to the outlet side of the first flow field structure.
13. The plate of claim 11, wherein the plurality of flow channels of the first flow field structure are any one of linear, curvilinear, and serpentine flow channels.
14. A fuel cell, comprising:
at least one repeating component comprising a first electrode plate, a second electrode plate, and a membrane electrode assembly sandwiched therebetween, the first electrode plate comprising an anode face in contact with the membrane electrode assembly to distribute fuel gas, and the second electrode plate comprising a cathode face in contact with the membrane electrode assembly to distribute oxidizing gas; and
a holding device comprising a first end plate, a second end plate, and a connecting member for connecting the two, for fixing the at least one repeating member in a stacked state between mutually opposed support surfaces of the first end plate and the second end plate,
wherein the first plate is a plate according to any one of claims 1 to 13.
15. A fuel cell, comprising:
at least one repeating component comprising a first plate, a first membrane electrode assembly, a common plate, a second membrane electrode assembly, a second plate, the first membrane electrode assembly being positioned between the first plate and the common plate, the second membrane electrode assembly being positioned between the second plate and the common plate, the first plate comprising an anode face in contact with the first membrane electrode assembly to distribute fuel gas, the common plate comprising a cathode face in contact with the first membrane electrode assembly to distribute oxidizing gas, the common plate further comprising an anode face in contact with the second membrane electrode assembly to distribute fuel gas, the second plate comprising a cathode face in contact with the second membrane electrode assembly to distribute oxidizing gas; and
a holding device comprising a first end plate, a second end plate, and a connecting member for connecting the two, for fixing the at least one repeating member in a stacked state between mutually opposed support surfaces of the first end plate and the second end plate,
wherein the first plate is a plate according to any one of claims 1 to 13.
CN202211379593.8A 2022-11-04 2022-11-04 Fuel cell and electrode plate for fuel cell Active CN115579484B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211379593.8A CN115579484B (en) 2022-11-04 2022-11-04 Fuel cell and electrode plate for fuel cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211379593.8A CN115579484B (en) 2022-11-04 2022-11-04 Fuel cell and electrode plate for fuel cell

Publications (2)

Publication Number Publication Date
CN115579484A true CN115579484A (en) 2023-01-06
CN115579484B CN115579484B (en) 2023-11-17

Family

ID=84588277

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211379593.8A Active CN115579484B (en) 2022-11-04 2022-11-04 Fuel cell and electrode plate for fuel cell

Country Status (1)

Country Link
CN (1) CN115579484B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209200075U (en) * 2019-01-26 2019-08-02 杭州德海艾科能源科技有限公司 A kind of parallel-connection type hydraulic galvanic battery electrode frame
CN111293325A (en) * 2020-04-28 2020-06-16 北京朔景新能源科技有限公司 Fuel cell, and bipolar plate assembly for fuel cell
CN212113903U (en) * 2020-06-23 2020-12-08 未势能源科技有限公司 Fuel cell stack and fuel cell power generation device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209200075U (en) * 2019-01-26 2019-08-02 杭州德海艾科能源科技有限公司 A kind of parallel-connection type hydraulic galvanic battery electrode frame
CN111293325A (en) * 2020-04-28 2020-06-16 北京朔景新能源科技有限公司 Fuel cell, and bipolar plate assembly for fuel cell
CN212113903U (en) * 2020-06-23 2020-12-08 未势能源科技有限公司 Fuel cell stack and fuel cell power generation device

Also Published As

Publication number Publication date
CN115579484B (en) 2023-11-17

Similar Documents

Publication Publication Date Title
US11784326B2 (en) Fuel cell, bipolar plate and bipolar plate assembly for fuel cell
US9905880B2 (en) Fuel cell stack
US7718298B2 (en) Bifurcation of flow channels in bipolar plate flowfields
US7867666B2 (en) Fuel cell with triangular buffers for reactant gas and coolant
US20050153184A1 (en) Bipolar plate with cross-linked channels
CN111244496B (en) Fuel cell and flow distribution device
JP2006508496A (en) Fuel cell flow field plate
CN211929619U (en) Bipolar plate for fuel cell
CN214254475U (en) Fuel cell and repeating component for fuel cell
CN112909283A (en) Proton exchange membrane fuel cell bipolar plate
US7041407B2 (en) Separator plate structure for fuel cell stack
US20080166621A1 (en) Fuel Cell Separator
CA2526934C (en) Apparatus and method for conducting fluid in a fuel cell and fuel cell employing same
CN212392280U (en) Fuel cell
KR20130076118A (en) Fuelcell stack using branched channel
CN115579484B (en) Fuel cell and electrode plate for fuel cell
US20040038103A1 (en) Solid polymer electrolyte fuel cell assembly
US20070003814A1 (en) Polymer electrolyte membrane fuel cell stack
CN211929634U (en) Interface plate for fuel cell
JP2007234315A (en) Fuel cell
JP2006210212A (en) Polymer electrolyte fuel cell
US20030170528A1 (en) Moldable separator plate for electrochemical devices and cells
CN115642267B (en) Fuel cell, and plate and bipolar plate assembly for fuel cell
CN221041172U (en) Bipolar plate and low-temperature polymer electrolyte membrane fuel cell
CN115692813B (en) Fuel cell stack and fuel cell system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant