CN115621481A - Bipolar plate structure and fuel cell - Google Patents
Bipolar plate structure and fuel cell Download PDFInfo
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- CN115621481A CN115621481A CN202211386305.1A CN202211386305A CN115621481A CN 115621481 A CN115621481 A CN 115621481A CN 202211386305 A CN202211386305 A CN 202211386305A CN 115621481 A CN115621481 A CN 115621481A
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- 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
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- 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
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- 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
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
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- 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
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
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- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to the technical field of fuel cells, in particular to a bipolar plate structure and a fuel cell, wherein the bipolar plate structure comprises a bipolar plate body, a reaction gas inlet and a reaction gas outlet are arranged on the bipolar plate body at intervals, and the area of the reaction gas inlet is smaller than that of the reaction gas outlet; the side surface of the bipolar plate body is provided with a flow field communicated with the reaction gas inlet and the reaction gas outlet, the flow field comprises a plurality of first flow channels arranged at intervals and a plurality of second flow channels arranged at intervals, the first flow channels extend along a first direction, the second flow channels are wavy, each second flow channel is communicated with all the first flow channels, and the second flow channels extend along a second direction forming an included angle with the first direction. The invention can reduce the pressure drop of the inlet and the outlet while the reaction gas is uniformly distributed in the flow field, and can discharge the generated water in time, thereby improving the efficiency of the fuel cell.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a bipolar plate structure and a fuel cell.
Background
The proton exchange membrane fuel cell is an energy conversion device which has the advantages of quick start time, light weight, cleanness, environmental protection and high efficiency. The hydrogen gas generates electrons and hydrogen protons under the action of the catalyst and the proton exchange membrane, and the oxygen gas combines with the hydrogen protons and the electrons under the action of the catalyst and the proton exchange membrane to generate water and generate working current at the same time. The generating efficiency of the proton exchange membrane fuel cell reaches more than 60 percent and is not limited by Carnot cycle, the electrochemical reaction only has water, and the problems of environmental pollution and energy shortage are greatly solved.
The bipolar plate is one of the key components of the proton exchange membrane fuel cell, and has the functions of supporting the proton exchange membrane, uniformly distributing reaction gas, collecting and conducting electrons and the like. The flow field structure design of the bipolar plate is crucial to the performance of the fuel cell, and the reasonable design ensures that the reaction gas is uniformly distributed in the flow field, accelerates the discharge of the generated water and improves the discharge performance of the fuel cell. The traditional flow field structure comprises a snake-shaped flow field, a parallel flow field, an interdigital flow field and a dot-shaped flow field. The pressure drop of the inlet and the outlet of the serpentine flow field is large, so that generated water can be discharged in time, but the gas concentration gradient is also large, and the current is unevenly distributed. The parallel flow field is simple to process, but the water is difficult to discharge. The flow channels of the interdigitated flow field are discontinuous, the internal air pressure of the flow channels is high, and although water is easy to be discharged, the flow channels are easy to be damaged, and the efficiency of the fuel cell is reduced.
Therefore, a bipolar plate structure and a fuel cell are needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a bipolar plate structure and a fuel cell, which can reduce the pressure drop of an inlet and an outlet while the reaction gas is uniformly distributed in a flow field, discharge generated water in time and improve the efficiency of the fuel cell.
In order to achieve the purpose, the invention adopts the following technical scheme:
a bipolar plate structure comprising: the bipolar plate comprises a bipolar plate body, wherein a reaction gas inlet and a reaction gas outlet are arranged on the bipolar plate body at intervals, and the area of the reaction gas inlet is smaller than that of the reaction gas outlet; the bipolar plate comprises a bipolar plate body and is characterized in that a flow field communicated with a reaction gas inlet and a reaction gas outlet is formed in the side surface of the bipolar plate body, the flow field comprises a plurality of first flow channels arranged at intervals and a plurality of second flow channels arranged at intervals, the first flow channels extend along a first direction, the first direction is parallel to the flowing direction of reaction gas, the second flow channels are wavy, each second flow channel is communicated with all the first flow channels, and the second flow channels extend along a second direction forming an included angle with the first direction.
Furthermore, a first distribution area is arranged between the reaction gas inlet and the flow field, first dot matrixes are uniformly distributed in the first distribution area, and the first dot matrixes are arranged on the bipolar plate body.
Furthermore, the flow field comprises a flow splitting area, a direct-current area and a confluence area, the flow splitting area, the direct-current area and the confluence area are sequentially arranged along the first direction, the flow splitting area and the confluence area are both trapezoidal, one end of the flow splitting area, which is communicated with the first distribution area, is smaller than one end of the flow splitting area, which is communicated with the direct-current area, and one end of the confluence area, which is communicated with the reaction gas outlet, is smaller than one end of the confluence area, which is communicated with the direct-current area.
Furthermore, a first flow guide area is arranged between the first distribution area and the flow splitting area, a plurality of first flow guide blocks are convexly arranged in the first flow guide area at intervals, and the first flow guide blocks are arranged on the bipolar plate body at intervals along the second direction.
Further, the first flow guide block is hexagonal, and each corner of the first flow guide block is rounded.
Furthermore, a second distribution area is arranged between the confluence area and the reaction gas outlet, second lattices are uniformly distributed on the second distribution area, and the second lattices are arranged on the bipolar plate body.
Furthermore, a second flow guide area is arranged between the confluence area and the second distribution area, a plurality of second flow guide blocks are convexly arranged in the second flow guide area at intervals, and the second flow guide blocks are arranged on the bipolar plate body at intervals along the second direction.
Further, the first flow channel comprises a first section and a second section which are communicated with each other, the first section is communicated with a wave crest of the second flow channel, the second section penetrates through the wave crest, the diameter of the first section is smaller than that of the second flow channel, and the diameter of the second section is larger than that of the second flow channel.
Furthermore, a plurality of annular flow channels are formed in the bipolar plate, the annular flow channels are communicated with the first flow channels, and the annular flow channels are located between two adjacent second flow channels.
A fuel cell comprising a bipolar plate structure as described above.
The invention has the beneficial effects that:
the bipolar plate structure provided by the invention is characterized in that a reaction gas inlet and a reaction gas outlet are arranged on a bipolar plate body at intervals, the reaction gas inlet is communicated with the reaction gas outlet through a flow field, the flow field comprises a plurality of first flow channels and second flow channels, the first flow channels extend along a first direction, the second flow channels are wavy, each second flow channel is communicated with all the first flow channels, and the second flow channels extend along a second direction forming an included angle with the first direction. The flow field is similar to the leaf vein shape of the plant leaves, and a multi-stage branched flow field is formed. The multi-stage branched flow field improves the speed of discharging generated water from a reaction gas outlet, reduces the pressure drop and avoids causing a flooding phenomenon, the size of a reaction gas inlet is smaller than that of the reaction gas outlet, the pressure drop of an inlet and an outlet can be effectively reduced, and the performance of a fuel cell is improved.
The fuel cell provided by the invention comprises the bipolar plate structure, so that the pressure drop of an inlet and an outlet can be reduced while reaction gas is uniformly distributed in a flow field, generated water can be discharged in time, and the efficiency of the fuel cell is improved.
Drawings
FIG. 1 is a schematic view of a bipolar plate structure of the present invention;
FIG. 2 is a schematic view of a portion of a first flow channel and a second flow channel in a bipolar plate construction of the present invention;
fig. 3 is a schematic view of a first flow deflector in a bipolar plate structure of the present invention.
In the figure:
1. a flow field; 11. a shunting region; 12. a direct current region; 13. a converging region; 2. a first distribution area; 21. a first lattice; 3. a first flow guide block; 4. a reactant gas inlet; 41. a reaction gas outlet; 5. a second flow guide block; 6. a second distribution area; 61. a second lattice; 7. a first flow passage; 71. a first stage; 72. a second section; 8. a second flow passage; 9. and an annular flow passage.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections unless otherwise explicitly stated or limited; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to reduce the pressure drop of an inlet and an outlet and discharge generated water in time while enabling reaction gas to be uniformly distributed in a flow field and improve the efficiency of a fuel cell when the fuel cell is used for generating electricity, as shown in fig. 1 to 3, the invention provides a bipolar plate structure. The bipolar plate structure includes a bipolar plate body.
Wherein, a reaction gas inlet 4 and a reaction gas outlet 41 are arranged on the bipolar plate body at intervals, and the area of the reaction gas inlet 4 is smaller than that of the reaction gas outlet 41; the side surface of the bipolar plate body is provided with a flow field 1 communicated with a reaction gas inlet 4 and a reaction gas outlet 41, the flow field 1 comprises a plurality of first flow channels 7 arranged at intervals and a plurality of second flow channels 8 arranged at intervals, the first flow channels 7 extend along a first direction, the first direction is parallel to the flowing direction of the reaction gas, the second flow channels 8 are wavy, each second flow channel 8 is communicated with all the first flow channels 7, and the second flow channels 8 extend along a second direction forming an included angle with the first direction.
Through the design of the first flow channel 7 and the second flow channel 8, the flow field 1 is formed into a vein shape similar to a plant leaf, and a multi-stage branched flow field 1 is formed. The multi-stage branched flow field 1 can improve the speed of discharging generated water from the reaction gas outlet 41, reduce the pressure drop and avoid flooding, the size of the reaction gas inlet is smaller than that of the reaction gas outlet 41, the pressure drop of the inlet and the outlet can be effectively reduced, and the performance of the fuel cell can be improved.
Furthermore, a first distribution area 2 is arranged between the reaction gas inlet 4 and the flow field 1, first lattices 21 are uniformly distributed in the first distribution area 2, and the first lattices 21 are fixedly arranged on the bipolar plate body. By arranging the first distribution area 2 and uniformly distributing the reaction gas by using the first dot matrix 21, the reaction gas can be ensured to uniformly enter the flow field 1, so that the reaction gas is distributed in the whole area of the flow field 1.
Further, the flow field 1 comprises a flow splitting area 11, a direct current area 12 and a confluence area 13, the flow splitting area 11, the direct current area 12 and the confluence area 13 are sequentially arranged along a first direction, the flow splitting area 11 and the confluence area 13 are both trapezoidal, one end of the flow splitting area 11, which is communicated with the first distribution area 2, is smaller than one end of the flow splitting area 11, which is communicated with the direct current area 12, and one end of the confluence area 13, which is communicated with the reaction gas outlet 41, is smaller than one end of the confluence area 13, which is communicated with the direct current area 12. Specifically, the flow splitting region 11 can effectively and uniformly distribute the reaction gas to the whole flow field 1 region; the width of the direct current region 12 is consistent with that of the flow field 1, the area of the direct current region 12 is large, and the fluid is uniformly distributed, so that the residence time of reaction gas is long, and the related electrochemical reaction is more sufficient; the width of the confluence area 13 is gradually reduced along the flow direction of the fluid, and the confluence area 13 can collect the reacted gas and the generated water, so that the discharge speed of the reacted gas and the water is improved, and the flooding phenomenon of the battery is avoided.
Furthermore, a first flow guide area is arranged between the first distribution area 2 and the flow distribution area 11, a plurality of first flow guide blocks 3 are convexly arranged in the first flow guide area at intervals, and the first flow guide blocks 3 are arranged on the bipolar plate body at intervals along the second direction. The first flow guide blocks 3 can effectively collect the reaction gas in the first distribution area 2 and then uniformly distribute the reaction gas in the whole flow field 1.
Further, the first flow guiding block 3 is hexagonal, and each corner of the first flow guiding block 3 is rounded. The rounding of the corners can ensure the smoothness of the first flow guide blocks 3, so that the reaction gas smoothly flows into the flow field 1 from the space between the adjacent first flow guide blocks 3.
Furthermore, a second distribution area 6 is arranged between the confluence area 13 and the reaction gas outlet 41, a second lattice 61 is uniformly distributed on the second distribution area 6, and the second lattice 61 is arranged on the bipolar plate body. By providing the second distribution area 6, the reaction gas and water are uniformly distributed by the second lattice 61 and then discharged through the reaction gas outlet 41.
Furthermore, a second flow guiding area is arranged between the converging area 13 and the second distribution area 6, a plurality of second flow guiding blocks 5 are convexly arranged in the second flow guiding area at intervals, and the second flow guiding blocks 5 are arranged on the bipolar plate body at intervals along the second direction. The second flow guide block 5 can effectively collect the reaction gas and the generated water in the flow field 1 area so as to improve the discharge speed of the reaction gas and the generated water and avoid causing a water flooding phenomenon.
Further, the first flow channel 7 includes a first section 71 and a second section 72 which are communicated with each other, the first section 71 is communicated with the wave crest of the second flow channel 8, the second section 72 passes through the wave crest, the diameter of the first section 71 is smaller than that of the second flow channel 8, and the diameter of the second section 72 is larger than that of the second flow channel 8. Specifically, in the present embodiment, the width of the first section 71 is 1mm to 2mm, and may be, for example, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4,mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, but is not limited to the enumerated values; the width of the second section 72 is 2mm to 4mm, and may be, for example, 2mm, 3mm, 4mm, but is not limited to the values listed; the width of the second flow channel 8 is 1.5mm to 3mm, and may be, for example, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4,4 mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, but is not limited to the above-mentioned values; the first flow channel 7 and the second flow channel 8 have a depth of 0.1mm to 3mm, for example 0.5mm, 1mm, 2mm, 3mm, but are not limited to the values listed and other values not listed are equally suitable. The included angle between the second flow channel 8 and the first flow channel 7 is α, and α ranges from 30 ° to 75 °, and may be, for example, 30 °, 40 °, 50 °, 60 °, 70 °, and 75 °, but is not limited to the illustrated values. Through the arrangement, the first flow channel 7 and the second flow channel 8 are arranged into the flow channel units similar to the shapes of the plant veins by adopting the bionic principle, the plant veins in nature are utilized to reduce the resistance of fluid flow, and the distribution uniformity of the reaction gas is improved, so that the reaction gas and the generated water can more easily uniformly flow and diffuse in the flow field 1.
Furthermore, a plurality of annular flow channels 9 are formed in the bipolar plate, the annular flow channels 9 are communicated with the first flow channels 7, and the annular flow channels 9 are located between two adjacent second flow channels 8. Through setting up annular runner 9 for first runner 7 communicates with annular runner 9 circles round each other, has increased reactant gas's disturbance degree, does benefit to more abundant even the reaching membrane electrode through the diffusion of reactant gas, also helps the reactant gas backward flow that does not take place the reaction simultaneously, has improved reactant gas's reuse rate.
Furthermore, a cooling water circulation pipeline is arranged on the bipolar plate, and the bipolar plate is cooled by using cooling water, so that the electrochemical reaction is ensured to be smoothly carried out.
The embodiment also provides a fuel cell, which comprises the bipolar plate structure, so that the pressure drop of the inlet and the outlet can be reduced while the reaction gas is uniformly distributed in the flow field 1, the generated water can be discharged in time, and the efficiency of the fuel cell is improved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A bipolar plate structure, comprising: the bipolar plate comprises a bipolar plate body, wherein a reaction gas inlet (4) and a reaction gas outlet (41) are formed in the bipolar plate body at intervals, and the area of the reaction gas inlet (4) is smaller than that of the reaction gas outlet (41); the side of the bipolar plate body is provided with a flow field (1) communicated with the reaction gas inlet (4) and the reaction gas outlet (41), the flow field (1) comprises a plurality of first flow channels (7) arranged at intervals and a plurality of second flow channels (8) arranged at intervals, the first flow channels (7) extend along a first direction, the first direction is parallel to the flowing direction of the reaction gas, the second flow channels (8) are wavy, each second flow channel (8) is communicated with all the first flow channels (7), and the second flow channels (8) extend along a second direction which forms an included angle with the first direction.
2. A bipolar plate structure as claimed in claim 1, characterised in that a first distribution area (2) is provided between the reactant gas inlet (4) and the flow field (1), the first distribution area (2) evenly distributing a first lattice (21), the first lattice (21) being provided on the bipolar plate body.
3. A bipolar plate structure as claimed in claim 2, wherein the flow field (1) comprises a flow splitting area (11), a flow directing area (12) and a flow converging area (13), the flow splitting area (11), the flow directing area (12) and the flow converging area (13) are arranged in sequence along the first direction, the flow splitting area (11) and the flow converging area (13) are both trapezoidal, one end of the flow splitting area (11) communicating with the first flow splitting area (2) is smaller than one end of the flow splitting area (11) communicating with the flow directing area (12), and one end of the flow converging area (13) communicating with the reaction gas outlet (41) is smaller than one end of the flow converging area (13) communicating with the flow directing area (12).
4. A bipolar plate structure according to claim 3, wherein a first flow guiding area is arranged between the first distribution area (2) and the flow splitting area (11), the first flow guiding area is convexly provided with a plurality of first flow guiding blocks (3), and the first flow guiding blocks (3) are arranged on the bipolar plate body at intervals along the second direction.
5. The bipolar plate structure of claim 4, wherein the first flow-guiding block (3) is hexagonal and each corner of the first flow-guiding block (3) is rounded.
6. A bipolar plate structure according to claim 3, characterized in that a second distribution area (6) is arranged between the junction area (13) and the reaction gas outlets (41), the second distribution area (6) is equispaced by a second lattice (61), the second lattice (61) being arranged on the bipolar plate body.
7. A bipolar plate structure as claimed in claim 6, wherein a second flow guiding region is arranged between the junction region (13) and the second distribution region (6), the second flow guiding region being convexly provided with a plurality of second flow guiding blocks (5), the second flow guiding blocks (5) being arranged at intervals on the bipolar plate body along the second direction.
8. A bipolar plate structure as claimed in claim 1, wherein said first flow channel (7) comprises a first section (71) and a second section (72) communicating with each other, said first section (71) communicating with a crest of said second flow channel (8), said second section (72) passing through said crest, said first section (71) having a diameter smaller than that of said second flow channel (8), said second section (72) having a diameter larger than that of said second flow channel (8).
9. The bipolar plate structure as claimed in claim 1, wherein a plurality of annular flow channels (9) are formed on the bipolar plate, the annular flow channels (9) are communicated with the first flow channels (7), and the annular flow channels (9) are located between two adjacent second flow channels (8).
10. A fuel cell comprising a bipolar plate structure according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211386305.1A CN115621481A (en) | 2022-11-07 | 2022-11-07 | Bipolar plate structure and fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211386305.1A CN115621481A (en) | 2022-11-07 | 2022-11-07 | Bipolar plate structure and fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115621481A true CN115621481A (en) | 2023-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211386305.1A Pending CN115621481A (en) | 2022-11-07 | 2022-11-07 | Bipolar plate structure and fuel cell |
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| Country | Link |
|---|---|
| CN (1) | CN115621481A (en) |
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2022
- 2022-11-07 CN CN202211386305.1A patent/CN115621481A/en active Pending
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