CN111668506B - Novel metal bipolar plate of hydrogen fuel cell - Google Patents
Novel metal bipolar plate of hydrogen fuel cell Download PDFInfo
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- CN111668506B CN111668506B CN202010599469.7A CN202010599469A CN111668506B CN 111668506 B CN111668506 B CN 111668506B CN 202010599469 A CN202010599469 A CN 202010599469A CN 111668506 B CN111668506 B CN 111668506B
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- 239000000446 fuel Substances 0.000 title claims abstract description 44
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 239000001257 hydrogen Substances 0.000 title claims abstract description 13
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 13
- 239000002184 metal Substances 0.000 title claims abstract description 11
- 230000007704 transition Effects 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000003466 welding Methods 0.000 claims abstract description 16
- 239000007800 oxidant agent Substances 0.000 claims description 40
- 230000001590 oxidative effect Effects 0.000 claims description 38
- 238000000465 moulding Methods 0.000 claims description 22
- 239000002826 coolant Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 12
- 238000000748 compression moulding Methods 0.000 claims description 7
- 239000000110 cooling liquid Substances 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0206—Metals or alloys
-
- 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
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
-
- 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
- H01M8/0276—Sealing means characterised by their form
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- 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 novel metal bipolar plate of a hydrogen fuel cell, which comprises an anode single plate and a cathode single plate which are welded together, wherein the anode single plate and the cathode single plate have the same structure, and the novel metal bipolar plate also comprises an inlet channel area, an inlet end flow channel transition area, a flow field flow channel area, an outlet end flow channel transition area, an outlet channel area, a sealing line area and a welding line area.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cells, in particular to a novel metal bipolar plate of a hydrogen fuel cell.
Background
Proton Exchange Membrane Fuel Cells (PEMFCs) are considered to be a potential clean energy source with their high efficiency, high specific energy, low pollution. The bipolar plate is a key component of the PEMFC, occupies 70% -80% of the weight of the battery, occupies a considerable proportion in the production cost of the battery, has the functions of mechanically supporting membrane electrodes, isolating and distributing reactants and collecting and conducting current, and simultaneously, also plays roles of heat dissipation and drainage of the whole battery system.
Today, conventional bipolar plates are mainly made of graphite materials and are molded into various runner shapes by compression molding. However, the graphite bipolar plate is thick and heavy, the weight of the whole battery system is increased, and the defects of low mechanical strength, high conductive resistance, high processing cost and the like of the graphite bipolar plate always restrict the improvement of the whole performance of the battery system.
In addition, a large-area compression sealing gasket is adopted between the existing metal bipolar plate and the MEA when sealing fuel and oxidant, but the sealing effect can only be achieved under the conditions of low-power galvanic pile and low air inlet pressure; for some high power stacks requiring high pressure intake, this approach presents a risk of gas leakage. In addition, the circulation of the conventional intermediate cooling flow channels of many metal bipolar plates is not ideal, and the distribution uniformity of the cooling liquid is problematic.
Disclosure of Invention
Aiming at the technical problems, the invention provides a novel metal bipolar plate of a hydrogen fuel cell, which is formed by adopting a metal material for compression molding, has good forming quality, light weight, high production efficiency and good heat conduction performance, improves the heat dissipation performance of the hydrogen fuel cell, improves the structure of a flow passage transition region, optimizes the detailed structural dimension of the bipolar plate, increases a sealing line region, and ensures that the circulation and distribution of fuel, oxidant and cooling liquid between an anode single plate and a cathode single plate are more uniform.
The novel metal bipolar plate of the hydrogen fuel cell comprises an anode single plate and a cathode single plate which are welded together, wherein the anode single plate and the cathode single plate have the same structure and comprise an inlet channel area, an inlet end flow channel transition area, a flow field flow channel area, an outlet end flow channel transition area, an outlet channel area, a sealing line area and a welding line area;
The inlet channel region comprises a fuel inlet, a coolant inlet and an oxidant inlet, the outlet channel region comprises a fuel outlet, a coolant outlet and an oxidant outlet, the sectional areas of the oxidant inlet and the oxidant outlet are not smaller than the sectional areas of the fuel inlet and the fuel outlet respectively, and the backs of the fuel inlet, the fuel outlet, the oxidant inlet and the oxidant outlet are provided with a plurality of air outlets;
The inlet end flow channel transition area and the outlet end flow channel transition area are communicated with a fuel inlet, a flow field flow channel area and a fuel outlet or an oxidant inlet, a flow field flow channel area and an oxidant outlet, the inlet end flow channel transition area and the outlet end flow channel transition area are respectively provided with a large boss, a small boss and a plurality of strip-shaped flow dividing parts, the large bosses are connected with the flow field flow channel area, the strip-shaped flow dividing parts are partially overlapped with the large bosses, the small bosses are arranged on the large bosses, the height of the large bosses is not larger than that of the small bosses, and the tops of the strip-shaped flow dividing parts, the flow field flow channel area and the small bosses are on the same horizontal plane;
The sealing line areas are arranged on the outer sides of the air inlets and the air outlets, gaps between the anode single plate and the cathode single plate sealing line areas are cooling liquid flow channels, the welding line areas are arranged on the outer sides of the sealing line areas of the gas inlet, the gas outlet, the oxidant inlet and the oxidant outlet, the welding line areas are also arranged on the outer edges of all the whole anode single plates and the cathode single plates, and the welding line areas are used for fixing the anode single plates and the cathode single plates.
As the preferable choice of the technical proposal, the anode veneer and the cathode veneer are formed by adopting stainless steel sheet compression molding.
Preferably, the molding depth of the welding line area is consistent with the molding depth of the flow field flow channel area, and the molding depth of the sealing line area is smaller than the molding depth of the welding line area.
Preferably, the molding depth of the seal line region is 0.4 to 0.6 times the molding depth of the weld line region.
Preferably, in the above technical solution, the height of the large boss is 0.4 to 0.5 times the height of the small boss.
Preferably, the thickness of the anode single plate and the cathode single plate is 0.05-0.1mm.
As the preferable mode of the technical scheme, the molding depth of the flow field flow channel region is 0.4mm, and the interval between adjacent flow channels of the flow field flow channel region is 1.2mm.
The invention has the beneficial effects that:
1. The metal material is adopted for compression molding, so that the molding quality is good, the weight is light, the production efficiency is high, the heat conduction performance is good, and the heat dissipation performance of the hydrogen fuel cell is improved.
2. The back of the gas inlet, the gas outlet, the oxidant inlet and the oxidant outlet, which are adjacent to the welding line area, are provided with a circle of ventilation holes at intervals, so that smooth circulation of the gas and the oxidant can be effectively ensured.
3. The strip-shaped separation part, the large boss and the small boss are arranged, so that the structures of the transition area of the inlet end and the transition area of the outlet end are improved, the gas and the oxidant enter and exit the inlet channel area and the outlet channel area and pass through the flow field flow channel area more uniformly, and the overall performance of the hydrogen fuel cell is improved.
4. And a welding line area and a sealing line area are arranged, the sealing line area is matched with the sealing line of the MEA, the sealing performance of the bipolar plate can be well ensured, and good distribution and circulation of cooling liquid are ensured.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is an enlarged schematic view of the inlet channel area or outlet channel area of the present invention.
Fig. 4 is a perspective cutaway view of fig. 3.
Fig. 5 is an enlarged schematic view of an inlet end flow path transition zone or an outlet end flow path transition zone in accordance with the present invention.
Fig. 6 is a schematic diagram of the structure of the fuel inlet, the fuel outlet, the oxidant inlet, or the oxidant outlet.
Fig. 7 is a partial cutaway view of fig. 5.
Fig. 8 is a partial cutaway view of a coolant inlet or coolant outlet.
The reference numerals are as follows: 1-anode veneer, 2-cathode veneer, 3-inlet channel region, 301-fuel inlet, 302-coolant inlet, 303-oxidant inlet, 4-inlet end flow channel transition region, 5-flow field flow channel region, 6-outlet end flow channel transition region, 7-outlet channel region, 701-fuel outlet, 702-coolant outlet, 703-oxidant outlet, 8-seal line region, 9-weld line region, 10-gas outlet, 11-large boss, 12-small boss, 13-stripe split.
Detailed Description
The present embodiment is described in detail below with reference to the accompanying drawings.
The novel hydrogen fuel cell metal bipolar plate comprises an anode single plate 1 and a cathode single plate 2 which are welded together, wherein the anode single plate 1 and the cathode single plate 2 have the same structure and comprise an inlet channel area 3, an inlet end flow passage transition area 4, a flow field flow passage area 5, an outlet end flow passage transition area 6, an outlet channel area 7, a sealing line area 8 and a welding line area 9;
The inlet channel area 3 comprises a fuel inlet 301, a coolant inlet 302 and an oxidant inlet 303, the outlet channel area 7 comprises a fuel outlet 701, a coolant outlet 702 and an oxidant outlet 703, the cross-sectional areas of the oxidant inlet 303 and the oxidant outlet 703 are not smaller than the cross-sectional areas of the fuel inlet 301 and the fuel outlet 701 respectively, and the backs of the fuel inlet 301, the fuel outlet 303, the oxidant inlet 701 and the oxidant outlet 703 are provided with a plurality of air outlet holes 10;
The inlet end flow passage transition region 4 and the outlet end flow passage transition region 6 are used for communicating the fuel inlet 301, the flow field flow passage region 5 and the fuel outlet 701 or the oxidant inlet 303, the flow field flow passage region 5 and the oxidant outlet 703, the inlet end flow passage transition region 4 and the outlet end flow passage transition region 6 are respectively provided with a large boss 11, a small boss 12 and a plurality of strip-shaped splitting parts 13, the large boss 11 is connected with the flow field flow passage region 5, the strip-shaped splitting parts 13 are partially overlapped with the large boss 11, the small boss 12 is arranged on the large boss 11, the height 1 of the large boss 11 is not greater than the height of the small boss 12, the tops of the strip-shaped splitting parts 13, the flow field flow passage region 5 and the small boss 12 are on the same horizontal plane, and the strip-shaped splitting parts 13 split the fluid passing through the area so that the fluid more uniformly enters the flow field flow passage region 5 or returns to the outlet channel region 7;
The seal line area 8 is arranged at the outer side of each air inlet and air outlet, gaps between the seal line areas 8 of the anode single plate 1 and the cathode single plate 2 are coolant flow channels, the weld line area 9 is arranged at the outer side of the seal line areas 8 of the gas inlet 301, the gas outlet 701, the oxidant inlet 303 and the oxidant outlet 703, the weld line areas 9 are also arranged at the outer edges of all the whole anode single plate 1 and cathode single plate 2, the weld line areas 9 are used for fixing the anode single plate 1 and the cathode single plate 2, and a coolant flow channel communicated with the coolant inlet 302 and the coolant outlet 702 is formed in the cavity between the anode single plate 1 and the cathode single plate 2.
In this embodiment, the anode single plate 1 and the cathode single plate 2 are formed by compression molding of stainless steel thin plates, and meanwhile, metal alloy thin plates with other same performances can be adopted, so that the metal material is light in weight, good in compression molding quality, high in production efficiency and good in heat conductivity, and the heat dissipation performance of the hydrogen fuel cell can be effectively improved.
In this embodiment, the molding depth of the weld line region 9 is identical to the molding depth of the flow field channel region 5, and the molding depth of the seal line region 8 is smaller than the molding depth of the weld line region 9.
In this embodiment, the molding depth of the seal line area is 0.4 to 0.6 times the molding depth of the weld line area.
In this embodiment, the height of the large boss is 0.4 to 0.5 times the height of the small boss.
In this embodiment, the plate thickness of the anode single plate 1 and the cathode single plate 2 is 0.05-0.1mm.
In this embodiment, the molding depth of the flow field channel region 5 is 0.4mm, and the interval between adjacent channels of the flow field channel region 5 is 1.2mm.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A novel hydrogen fuel cell metal bipolar plate, characterized in that: the anode single plate and the cathode single plate are welded together, have the same structure and comprise an inlet channel area, an inlet end flow channel transition area, a flow field flow channel area, an outlet end flow channel transition area, an outlet channel area, a sealing line area and a welding line area;
The inlet channel region comprises a fuel inlet, a coolant inlet and an oxidant inlet, the outlet channel region comprises a fuel outlet, a coolant outlet and an oxidant outlet, the sectional areas of the oxidant inlet and the oxidant outlet are not smaller than the sectional areas of the fuel inlet and the fuel outlet respectively, and the backs of the fuel inlet, the fuel outlet, the oxidant inlet and the oxidant outlet are provided with a plurality of air outlets;
The inlet end flow channel transition area and the outlet end flow channel transition area are communicated with a fuel inlet, a flow field flow channel area and a fuel outlet or an oxidant inlet, a flow field flow channel area and an oxidant outlet, the inlet end flow channel transition area and the outlet end flow channel transition area are respectively provided with a large boss, a small boss and a plurality of strip-shaped flow dividing parts, the large bosses are connected with the flow field flow channel area, the strip-shaped flow dividing parts are partially overlapped with the large bosses, the small bosses are arranged on the large bosses, the height of the large bosses is not larger than that of the small bosses, and the tops of the strip-shaped flow dividing parts, the flow field flow channel area and the small bosses are on the same horizontal plane;
The sealing line areas are arranged at the outer sides of the air inlets and the air outlets, gaps between the anode single plate and the cathode single plate sealing line areas are cooling liquid flow channels, the welding line areas are arranged at the outer sides of the sealing line areas of the gas inlet, the gas outlet, the oxidant inlet and the oxidant outlet, and the welding line areas are also arranged at the outer edges of all the whole anode single plates and the cathode single plates and used for fixing the anode single plates and the cathode single plates;
the anode single plate and the cathode single plate are formed by adopting stainless steel thin plates in a compression molding mode;
The height of the large boss is 0.4-0.6 times of the height of the small boss.
2. The metallic bipolar plate of claim 1, wherein: the molding depth of the welding line area is consistent with the molding depth of the flow field flow channel area, and the molding depth of the sealing line area is smaller than the molding depth of the welding line area.
3. The metallic bipolar plate of claim 2, wherein: the molding depth of the sealing line region is 0.4-0.6 times of the molding depth of the welding line region.
4. The metallic bipolar plate of claim 1, wherein: the thickness of the anode single plate and the cathode single plate is 0.05-0.1mm.
5. The metallic bipolar plate of claim 1, wherein: the molding depth of the flow field flow channel region is 0.4mm, and the interval between adjacent flow channels of the flow field flow channel region is 1.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599469.7A CN111668506B (en) | 2020-06-28 | 2020-06-28 | Novel metal bipolar plate of hydrogen fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599469.7A CN111668506B (en) | 2020-06-28 | 2020-06-28 | Novel metal bipolar plate of hydrogen fuel cell |
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| Publication Number | Publication Date |
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| CN111668506A CN111668506A (en) | 2020-09-15 |
| CN111668506B true CN111668506B (en) | 2024-07-05 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114551921B (en) * | 2020-11-26 | 2024-04-02 | 中国科学院大连化学物理研究所 | Flow field structure of high-temperature proton exchange membrane fuel cell |
| CN112909282B (en) * | 2021-01-29 | 2022-06-21 | 江苏大学 | Fuel cell bipolar plate and manufacturing method thereof |
| CN113013436A (en) * | 2021-02-26 | 2021-06-22 | 东风汽车集团股份有限公司 | Metal bipolar plate structure capable of being sealed firstly and then welded and assembling method thereof |
| CN113471467A (en) * | 2021-07-19 | 2021-10-01 | 上海氢晨新能源科技有限公司 | Compact fuel cell unit module and fuel cell |
| CN113594488B (en) * | 2021-07-20 | 2022-09-16 | 嘉寓氢能源科技(辽宁)有限公司 | Air-cooled proton exchange membrane fuel cell metal bipolar plate and fuel cell thereof |
| CN116365003A (en) * | 2023-03-17 | 2023-06-30 | 北京长征天民高科技有限公司 | Fuel cell stack and cell system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212085140U (en) * | 2020-06-28 | 2020-12-04 | 武汉雄韬氢雄燃料电池科技有限公司 | Novel metal bipolar plate of hydrogen fuel cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103700865B (en) * | 2013-12-18 | 2015-12-09 | 清华大学 | A metal bipolar plate for fuel cells |
| CN106571472B (en) * | 2016-11-10 | 2019-07-12 | 上海交通大学 | A kind of fuel battery metal double polar plate component enhancing flow uniformity |
| CN208208882U (en) * | 2018-03-06 | 2018-12-07 | 深圳众为氢能科技有限公司 | A kind of hydrogen fuel battery metal bi-polar plate with reinforcement structure |
| US11462747B2 (en) * | 2018-10-10 | 2022-10-04 | Jiangsu Horizon New Energy Technologies Co. Ltd. | Hybrid bipolar plate for fuel cell |
| CN110391436B (en) * | 2019-08-07 | 2024-07-09 | 上海电气集团股份有限公司 | Metal bipolar plate of proton exchange membrane fuel cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212085140U (en) * | 2020-06-28 | 2020-12-04 | 武汉雄韬氢雄燃料电池科技有限公司 | Novel metal bipolar plate of hydrogen fuel cell |
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