CN111446464A - Bipolar plate of fuel cell - Google Patents
Bipolar plate of fuel cell Download PDFInfo
- Publication number
- CN111446464A CN111446464A CN202010440995.9A CN202010440995A CN111446464A CN 111446464 A CN111446464 A CN 111446464A CN 202010440995 A CN202010440995 A CN 202010440995A CN 111446464 A CN111446464 A CN 111446464A
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- bipolar plate
- fuel cell
- flow channel
- slope
- trapezoidal
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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
-
- 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
- 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
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
-
- 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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- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a fuel cell bipolar plate, which comprises a bipolar plate body, wherein a flow field structure is arranged on the surface of the bipolar plate body, which is just opposite to a membrane electrode, the flow field structure comprises a plurality of meandering flow channels which are arranged in parallel, at least one trapezoidal protrusion is arranged in each meandering period of a flow channel groove of each meandering flow channel, each trapezoidal protrusion comprises a slope-facing surface, a slope-backing surface and a slope top surface, and the slope top surface is parallel to the bottom surface of the flow channel groove. The bipolar plate of the fuel cell can improve the mass transfer capacity of the bipolar plate, reduce concentration polarization and improve the mass transfer performance of the fuel cell under high current density and low stoichiometric ratio, and meanwhile, the reaction gas velocity component vertical to the bipolar plate body is favorable for improving the oxygen concentration under the ridge of the bipolar plate, so that the water heat distribution in the fuel cell is improved and the performance of the fuel cell is improved.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a bipolar plate of a fuel cell.
Background
The flow field structure of the fuel cell bipolar plate is directly related to the mass transfer of the fuel cell and the hydrothermal state in the cell, the bottom of the common flow channel groove with the two-dimensional bipolar plate structure is a plane parallel to the bipolar plate, the reaction gas only has a velocity component parallel to the bipolar plate when flowing through the bipolar plate, the reaction gas is mainly diffused to a membrane electrode by concentration difference, and the mass transfer capability is insufficient under the conditions of high electric density and low metering ratio; meanwhile, the oxygen concentration of the bipolar plate under the ridge relative to the membrane electrode is lower than that under the groove, so that the internal reaction of the fuel cell is uneven, the hydrothermal state is uneven, and the performance of the fuel cell is influenced.
In summary, how to solve the problems of insufficient mass transfer capability, low oxygen concentration under the ridge, non-uniform reaction, non-uniform hydrothermal state, and influence on the performance of the fuel cell, has become a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a fuel cell bipolar plate to solve the problems that the mass transfer capacity of the bipolar plate in the fuel cell is insufficient, the oxygen concentration under ridges is low, the reaction is not uniform, the hydrothermal state is not uniform, and the performance of the fuel cell is influenced.
In order to achieve the purpose, the invention provides a fuel cell bipolar plate, which comprises a bipolar plate body, wherein a flow field structure is arranged on one surface of the bipolar plate body, which is opposite to a membrane electrode, the flow field structure comprises a plurality of meandering flow channels which are arranged in parallel, at least one trapezoidal protrusion is arranged in each meandering period of a flow channel groove of each meandering flow channel, each trapezoidal protrusion comprises an upward slope surface, a back slope surface and a slope top surface, and the slope top surface is parallel to the bottom surface of the flow channel groove.
Preferably, the slope of the slope-facing surface and the slope of the slope-back surface are the same or different, and the slope value range of the slope-facing surface and the slope of the slope-back surface is 20-70 degrees.
Preferably, the height value of the top slope surface relative to the bottom surface of the flow channel groove is 0.2-0.8 times of the depth value of the flow channel groove, and the width of the trapezoidal bulge is consistent with the width of the flow channel groove.
Preferably, the flow channel groove comprises straight line segments and arc line segments which are alternately connected.
Preferably, the trapezoidal protrusion is disposed on the straight line segment, or the trapezoidal protrusion is disposed on the arc line segment.
Preferably, a plurality of trapezoidal protrusions are arranged in each meandering period, and part of the trapezoidal protrusions are located on the straight line segment and part of the trapezoidal protrusions are located on the arc line segment.
Preferably, the arrangement positions of the trapezoidal projections in the flow channel grooves of the adjacent two serpentine flow channels are the same or different.
Preferably, the height of the trapezoidal projections in the flow channel groove of each of the serpentine flow channels is the same.
Preferably, the height of the trapezoidal protrusions in the flow channel groove of each serpentine flow channel is different, and the height gradually increases or gradually decreases along the airflow traveling direction of the flow channel groove.
Preferably, the bipolar plate body is a metal bipolar plate, a graphite bipolar plate or a composite bipolar plate.
Compared with the introduction content of the background technology, the bipolar plate of the fuel cell comprises a bipolar plate body, wherein a flow field structure is arranged on the surface, right opposite to a membrane electrode, of the bipolar plate body, the flow field structure comprises a plurality of meandering flow channels which are arranged in parallel, at least one trapezoidal protrusion is arranged in each meandering period of a flow channel groove of each meandering flow channel, each trapezoidal protrusion comprises a slope-facing surface, a slope-backing surface and a slope top surface, and the slope top surface is parallel to the bottom surface of the flow channel groove. The bipolar plate of the fuel cell is applied, because the flow field structure is composed of a plurality of meandering flow channels which are arranged in parallel, the advancing direction of reaction air flow is changed when the reaction air flow passes through the meandering flow channels or is continuously changed, then the reaction air flow can collide with each other, and dense areas of the reaction air flow are scattered, so that the distribution of the reaction air flow in the flow field structure is more uniform, meanwhile, because the trapezoidal bulge is arranged in each meandering period of each flow channel groove, the air flow can generate a speed component which is vertical to the bipolar plate body when passing through the trapezoidal bulge, the mass transfer capability of the bipolar plate can be improved, the concentration polarization is reduced, the mass transfer performance of the fuel cell under the condition of high current density and low stoichiometric ratio is improved, meanwhile, the reaction air speed component which is vertical to the bipolar plate body is beneficial to improving the oxygen concentration under the, and the performance of the fuel cell is improved.
Drawings
Fig. 1 is a schematic front structural view of a flow field structure provided in an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure view of a trapezoidal protrusion disposed in a channel groove of a flow channel according to an embodiment of the present invention;
fig. 3 is a schematic structural view of an upward slope surface and a backward slope surface of a trapezoidal protrusion provided in the embodiment of the present invention, the slopes of which are different;
FIG. 4 is a schematic structural diagram of a trapezoidal protrusion located on an arc segment according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a trapezoidal protrusion located in a straight line segment according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of two adjacent flow channel grooves in which trapezoidal protrusions are arranged at the same position according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a serpentine cycle with a plurality of trapezoidal protrusions formed therein according to an embodiment of the present invention;
FIG. 8 is a schematic structural view illustrating a structure in which trapezoidal protrusions are formed at gradually increasing heights in a channel groove of a serpentine channel according to an embodiment of the present invention;
fig. 9 is a graph comparing mass transfer resistances of a cell to which a bipolar plate for a fuel cell according to the present invention is applied and a cell to which a bipolar plate for a fuel cell according to the present invention is not applied, according to an example of the present invention.
In the above figures 1-9 of the drawings,
the flow field structure 1, the meandering flow channel 2, the flow channel grooves 21, the flow channel ridges 22, the trapezoidal protrusions 3, the slope-facing surface 31, the slope-back surface 32 and the slope-top surface 33.
Detailed Description
The core of the invention is to provide a fuel cell bipolar plate to solve the problems of insufficient mass transfer capacity, low oxygen concentration under ridges, uneven reaction, uneven hydrothermal state and influence on the performance of the fuel cell of the bipolar plate in the fuel cell.
In order to make those skilled in the art better understand the technical solutions provided by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-8, a bipolar plate for a fuel cell according to an embodiment of the present invention includes a bipolar plate body, a flow field structure 1 is disposed on a side of the bipolar plate body facing a membrane electrode, and the bipolar plate is characterized in that the flow field structure includes a plurality of serpentine flow channels 2 arranged in parallel, at least one trapezoidal protrusion 3 is disposed in each serpentine period of a flow channel 21 of each serpentine flow channel 2, the trapezoidal protrusion 3 includes a slope surface 31, a slope surface 32, and a slope surface 33, and the slope surface 33 is parallel to a bottom surface of the flow channel 21.
The bipolar plate of the fuel cell is applied, because the flow field structure is composed of a plurality of meandering flow channels which are arranged in parallel, the advancing direction of reaction air flow is changed when the reaction air flow passes through the meandering flow channels or is continuously changed, then the reaction air flow can collide with each other, and dense areas of the reaction air flow are scattered, so that the distribution of the reaction air flow in the flow field structure is more uniform, meanwhile, because the trapezoidal bulge is arranged in each meandering period of each flow channel groove, the air flow can generate a speed component which is vertical to the bipolar plate body when passing through the trapezoidal bulge, the mass transfer capability of the bipolar plate can be improved, the concentration polarization is reduced, the mass transfer performance of the fuel cell under the condition of high current density and low stoichiometric ratio is improved, meanwhile, the reaction air speed component which is vertical to the bipolar plate body is beneficial to improving the oxygen concentration under the, and the performance of the fuel cell is improved.
It should be noted here that those skilled in the art will understand that, by providing several serpentine flow channels 2 on the bipolar plate body, each serpentine flow channel 2 will necessarily include a flow channel groove 21, and a flow channel ridge 22 will be formed between two adjacent serpentine flow channels 2.
In addition, it should be noted that the slope-facing surface 31, the slope-back surface 32 and the slope top surface 33 of the trapezoidal protrusion 3 are the slope-facing surface and the slope-back surface defined according to the flowing direction of the reactant gas flow when the bipolar plate is actually applied, wherein the slope-facing surface is the surface facing the reactant gas flow, and the slope-back surface is the surface opposite to the reactant gas flow.
In some specific embodiments, the slope of the slope-facing surface 31 and the slope-facing surface 32 may be the same (as shown in fig. 2) or different (as shown in fig. 3), for example, the slope of the slope-facing surface 31 is 40 °, the slope of the slope-facing surface 32 is 60 °, and the arrangement may be selected according to specific requirements during practical application. Meanwhile, the slope of the slope-facing surface 31 and the slope-backing surface 32 generally ranges from 20 degrees to 70 degrees. It should be understood that the slope ranges of the slope surface 31 and the slope surface 32 are only preferred examples of the embodiment of the present invention, and in the practical application process, other slope values may be selected and designed according to the arrangement requirement of the actual structure, which is not limited in more detail herein.
In some more specific embodiments, generally, the height of the sloped top 33 relative to the bottom of the flow channel 21 is 0.2-0.8 times the depth of the flow channel 21, and the width of the trapezoidal protrusion 3 is equal to the width of the flow channel 21. Through a large number of tests, the trapezoidal protrusions are designed to have the size value, so that the gas flow distribution in the flow channel grooves 21 of the bipolar plate and under the ridges of the bipolar plate is more uniform. It is understood that the above is only a preferred distance of the trapezoidal protrusion size applied to most bipolar plate structures according to the embodiments of the present invention, and other size values may be selected according to practical requirements in practical applications, which are not limited herein in more detail.
It should be further noted that the flow channel groove 21 may specifically include straight line segments and arc line segments, and the straight line segments and the arc line segments are alternately connected. The trapezoidal protrusion 3 can be selectively arranged on a straight line segment or an arc line segment. In the actual application process, the configuration can be selected according to the actual requirement.
Further, when a plurality of trapezoidal projections 3 are provided in each meandering period of the meandering flow passage, it is possible to select that a part of the trapezoidal projections 3 is located on a straight line segment and a part of the trapezoidal projections 3 is located on an arc line segment.
It should be noted that the arrangement positions of the trapezoidal projections 3 in the flow channel grooves 21 of the two adjacent serpentine flow channels 2 may be the same or different. In the practical application process, the selection can be carried out according to the practical arrangement requirement.
It should be noted that the height of the trapezoidal protrusions 3 in the flow channel 21 of each serpentine flow channel 2 can be selected to be the same height, or can be selected to be different heights, and in the practical application process, the arrangement can be selected according to the specific air tightness adjustment requirement.
For example, when the heights of the trapezoidal projections 3 in the flow channel 21 of each serpentine flow channel 2 are different, it is possible to specifically select a manner in which the heights of the trapezoidal projections 3 are designed to gradually increase in the direction in which the airflow of the flow channel 21 travels, or a manner in which the heights of the trapezoidal projections 3 are designed to gradually decrease in the direction in which the airflow of the flow channel 21 travels. In the practical application process, the arrangement can be selected according to the practical requirements.
In addition, it should be noted that the bipolar plate body may be a metal bipolar plate, a graphite bipolar plate or a composite bipolar plate, or a bipolar plate made of other materials commonly used by those skilled in the art, which is not limited herein.
In order to better understand the superiority of the bipolar plate of the fuel cell provided by the present invention compared with the conventional bipolar plate structure, the following comparison is made with reference to fig. 9:
the bipolar plate structure and the traditional bipolar plate structure are respectively assembled into a single cell to be tested on a test bench, the test result of the mass transfer resistance R3 under different cathode metering ratios under the current density of 2000mA/cm ^2 is shown in figure 8, and the result shows that the mass transfer resistance of the bipolar plate of the fuel cell provided by the invention is obviously lower than that of the traditional bipolar plate, and the mass transfer improvement effect is more obvious under the condition of low metering ratio.
The fuel cell bipolar plate provided by the present invention is described in detail above. It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It is also noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an 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 article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A fuel cell bipolar plate comprises a bipolar plate body, wherein a flow field structure (1) is arranged on one face, right opposite to a membrane electrode, of the bipolar plate body, and the fuel cell bipolar plate is characterized in that the flow field structure comprises a plurality of meandering flow channels (2) which are arranged in parallel, at least one trapezoidal protrusion (3) is arranged in each meandering period of a flow channel groove (21) of each meandering flow channel (2), each trapezoidal protrusion (3) comprises a slope facing surface (31), a slope back surface (32) and a slope top surface (33), and the slope top surface (33) is parallel to the bottom surface of the flow channel groove (21).
2. The fuel cell bipolar plate of claim 1, wherein the slope of the ramp surface (31) and the slope of the back surface (32) are the same or different, and the slope of the ramp surface (31) and the slope of the back surface (32) both range from 20 ° to 70 °.
3. The fuel cell bipolar plate according to claim 1, wherein the height of the bank top surface (33) with respect to the bottom surface of the flow channel groove (21) is 0.2 to 0.8 times the depth of the flow channel groove (21), and the width of the trapezoidal protrusion (3) coincides with the width of the flow channel groove (21).
4. A fuel cell bipolar plate according to claim 1, wherein said flow channel grooves (21) comprise straight line segments and arc line segments alternately connected.
5. A fuel cell bipolar plate according to claim 4, wherein said trapezoidal protrusion (3) is provided on said straight line segment or said trapezoidal protrusion (3) is provided on said arc line segment.
6. A fuel cell bipolar plate according to claim 4, wherein a plurality of said trapezoidal protrusions (3) are provided in each of said meandering periods, and a part of said trapezoidal protrusions (3) is located on said straight line segment and a part of said trapezoidal protrusions (3) is located on said arc line segment.
7. The fuel cell bipolar plate according to claim 1, wherein the arrangement positions of the trapezoidal protrusions (3) in the flow channel grooves (21) of the adjacent two serpentine flow channels (2) are the same or different.
8. The fuel cell bipolar plate according to claim 1, wherein the trapezoidal protrusions (3) in the flow channel groove (21) of each of the serpentine flow channels (2) have the same height.
9. The fuel cell bipolar plate according to claim 1, wherein the trapezoidal protrusions (3) in the flow channel grooves (21) of each of the serpentine flow channels (2) are different in height and gradually increase or gradually decrease in the gas flow traveling direction of the flow channel grooves (21).
10. The fuel cell bipolar plate of claim 1, wherein the bipolar plate body is a metal bipolar plate, a graphite bipolar plate, or a composite bipolar plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010440995.9A CN111446464A (en) | 2020-05-22 | 2020-05-22 | Bipolar plate of fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010440995.9A CN111446464A (en) | 2020-05-22 | 2020-05-22 | Bipolar plate of fuel cell |
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| Publication Number | Publication Date |
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| CN111446464A true CN111446464A (en) | 2020-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010440995.9A Withdrawn CN111446464A (en) | 2020-05-22 | 2020-05-22 | Bipolar plate of fuel cell |
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| Country | Link |
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| CN (1) | CN111446464A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113299942A (en) * | 2021-07-14 | 2021-08-24 | 江苏大学 | Bipolar plate with gas guide bosses arranged in stepped mode and fuel cell |
| CN113488673A (en) * | 2021-06-18 | 2021-10-08 | 湖南工程学院 | Bipolar plate of fuel cell |
| CN115000447A (en) * | 2022-07-04 | 2022-09-02 | 一汽解放汽车有限公司 | Polar plate, bipolar plate, fuel cell and vehicle |
| WO2024045669A1 (en) * | 2022-08-30 | 2024-03-07 | 上海捷氢科技股份有限公司 | Fuel cell and bipolar plate assembly thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101183723A (en) * | 2007-12-13 | 2008-05-21 | 上海交通大学 | Metal sheet profiled proton exchange membrane fuel cell bipolar plate |
| CN207977402U (en) * | 2018-03-06 | 2018-10-16 | 深圳众为氢能科技有限公司 | A kind of hydrogen fuel cell bipolar plate flow field structure |
| CN109065907A (en) * | 2018-08-21 | 2018-12-21 | 上海空间电源研究所 | A kind of fuel battery polar plate flow field structure and fuel battery pole board |
| CN110993985A (en) * | 2019-12-14 | 2020-04-10 | 中国科学院大连化学物理研究所 | Flow channel structure of metal bipolar plate flow field of fuel cell |
-
2020
- 2020-05-22 CN CN202010440995.9A patent/CN111446464A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183723A (en) * | 2007-12-13 | 2008-05-21 | 上海交通大学 | Metal sheet profiled proton exchange membrane fuel cell bipolar plate |
| CN207977402U (en) * | 2018-03-06 | 2018-10-16 | 深圳众为氢能科技有限公司 | A kind of hydrogen fuel cell bipolar plate flow field structure |
| CN109065907A (en) * | 2018-08-21 | 2018-12-21 | 上海空间电源研究所 | A kind of fuel battery polar plate flow field structure and fuel battery pole board |
| CN110993985A (en) * | 2019-12-14 | 2020-04-10 | 中国科学院大连化学物理研究所 | Flow channel structure of metal bipolar plate flow field of fuel cell |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113488673A (en) * | 2021-06-18 | 2021-10-08 | 湖南工程学院 | Bipolar plate of fuel cell |
| CN113299942A (en) * | 2021-07-14 | 2021-08-24 | 江苏大学 | Bipolar plate with gas guide bosses arranged in stepped mode and fuel cell |
| CN115000447A (en) * | 2022-07-04 | 2022-09-02 | 一汽解放汽车有限公司 | Polar plate, bipolar plate, fuel cell and vehicle |
| WO2024045669A1 (en) * | 2022-08-30 | 2024-03-07 | 上海捷氢科技股份有限公司 | Fuel cell and bipolar plate assembly thereof |
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Application publication date: 20200724 |
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