CN111769301A - Metal bipolar plate of fuel cell stack - Google Patents
Metal bipolar plate of fuel cell stack Download PDFInfo
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- CN111769301A CN111769301A CN201910263632.XA CN201910263632A CN111769301A CN 111769301 A CN111769301 A CN 111769301A CN 201910263632 A CN201910263632 A CN 201910263632A CN 111769301 A CN111769301 A CN 111769301A
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- field plate
- fuel cell
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 165
- 239000002184 metal Substances 0.000 title claims abstract description 165
- 239000000446 fuel Substances 0.000 title claims abstract description 58
- 238000005260 corrosion Methods 0.000 claims abstract description 27
- 230000007797 corrosion Effects 0.000 claims abstract description 26
- 239000007769 metal material Substances 0.000 claims abstract description 26
- 239000002826 coolant Substances 0.000 claims abstract description 23
- 239000002131 composite material Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000007789 gas Substances 0.000 claims description 38
- 239000007800 oxidant agent Substances 0.000 claims description 14
- 239000002737 fuel gas Substances 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 239000012528 membrane Substances 0.000 description 15
- 238000007789 sealing Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000001590 oxidative effect Effects 0.000 description 9
- 239000002253 acid Substances 0.000 description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910000861 Mg alloy Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
- H01M8/0228—Composites in the form of layered or coated products
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Fuel Cell (AREA)
Abstract
A fuel cell stack metal bipolar plate comprises a metal anode flow field plate and a metal cathode flow field plate, wherein the metal anode flow field plate and the metal cathode flow field plate are both of a composite double-layer structure, the thicker layer is made of a metal material with general corrosion resistance, the surface of the metal anode flow field plate is in contact with coolant air (water), the thinner layer is made of a metal material with high corrosion resistance, and the surface of the metal anode flow field plate is in contact with the cathode flow field and the anode flow field; the metal bipolar plate formed by the composite double-layer metal anode flow field plate and the metal cathode flow field plate has high structural rigidity, good corrosion resistance, good conductivity and heat conductivity, and the manufactured fuel cell can reliably work and operate for a long time.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a metal bipolar plate of a fuel cell stack.
Background
The fuel cell stack can directly convert chemical energy generated by the reaction of the hydrogen H2 and the oxygen O2 into usable electric energy, has high energy conversion rate, only contains water as a reaction product, is very environment-friendly, and is a preferred energy-saving, high-efficiency and environment-friendly power generation technical scheme.
The fuel Cell stack is formed by overlapping a plurality of unit cells in series. Each single Cell is composed of an MEA membrane assembly and bipolar plates at two sides, namely, the MEA membrane assembly is clamped between the two bipolar plates, and the formed single Cell has a laminated sandwich structure. The bipolar plate comprises an anode flow field plate and a cathode flow field plate, and can be made of graphite, metal and conductive polymer materials. When the fuel cell stack operates, fuel H2 gas is introduced into an anode flow field channel of the metal anode flow field plate, and coolant air (water) is introduced into a channel on the back surface of the metal anode flow field plate to cool the metal anode flow field plate; oxidant O2 gas is introduced into the cathode flow field channels of the metal cathode flow field plate, and coolant air (water) is also introduced into the back surface channels. The metal bipolar plate has the functions of distributing reaction gases H2 and O2 to a gas diffusion layer, providing mechanical support for the MEA membrane assembly and realizing electric connection with an anode electrode and a cathode electrode; the metal bipolar plate has the advantages of good air tightness and corrosion resistance, good electric and heat conducting properties, low resistivity, good mechanical strength, easy formation of a flow field channel, low manufacturing cost, convenient production and manufacturing and the like. In the proton membrane fuel cell of H2, O2/Air, the bipolar plate is in an acidic environment in which a humid, strong oxidizing agent and a strong reducing gas are present simultaneously. Since a common metal material is difficult to be used in a weak acid environment for a long time, the metal material for manufacturing the bipolar plate needs to be subjected to surface modification so as to meet the requirement of long-term stable use. The typical method at present is to coat the surface of the metal bipolar plate with TiN, TiC, CrN and CrC to improve the corrosion resistance of the metal bipolar plate.
The disadvantages and shortcomings of this approach are as follows:
1) the metal bipolar plate adopting the surface modification treatment has high manufacturing cost, long production period and poor economical efficiency;
2) the surface of TiN, TiC, CrN and CrC plating coat formed after the metal surface is modified has some defects of pinholes, pits and the like, thereby generating the problem of local corrosion;
3) because the TiN, TiC, CrN and CrC plating coat on the metal surface has the problem of different thermal expansion rates with the metal body, the TiN, TiC, CrN and CrC plating coat on the metal surface is delaminated from the metal surface after the plating coat on the metal surface is used for a period of time.
Disclosure of Invention
The invention aims to provide a metal bipolar plate of a fuel cell stack, which has the advantages of good corrosion resistance, low production and manufacturing cost and good economy.
The technical scheme adopted for solving the defects of the prior art method and process is as follows:
the invention provides a fuel cell stack metal bipolar plate, which comprises a metal anode flow field plate and a metal cathode flow field plate, wherein the metal anode flow field plate and the metal cathode flow field plate adopt a composite double-layer structure, wherein the thicker layer is made of a metal material with general corrosion resistance, the surface of the thicker layer is contacted with coolant air (water), the thinner layer is made of a metal material with high corrosion resistance, and the surface of the thinner layer is contacted with a cathode flow field O2 gas and an anode flow field H2 gas; the metal bipolar plate formed by the composite double-layer metal anode flow field plate and the metal cathode flow field plate has high structural rigidity, good corrosion resistance, good electrical conductivity and heat conductivity, and can reliably work in a weak acid environment inside a fuel cell stack for a long time.
The metal anode plate and the metal cathode plate in the metal bipolar plate can be manufactured by adopting a rolling pressing forming mode and a stamping pressing forming mode, and the thicker layer of metal in the metal anode plate and the metal cathode plate with the combined double-layer structure can be made of metal materials such as stainless steel, aluminum, copper, titanium, aluminum-magnesium alloy and the like.
Drawings
In the following figures 1 to 7:
FIG. 1 is a schematic diagram of a metal anode flow field plate (metal cathode flow field plate) in a metal bipolar plate of a typical prior art fuel cell stack;
FIG. 2 is a schematic view of a metal bipolar plate constructed with the metal anode flow field plate and the metal cathode flow field plate of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the flow channel structure of the metal anode flow field plate (metal cathode flow field plate) of FIG. 1;
FIG. 4 is a schematic cross-sectional view of a flow channel structure of a metal anode flow field plate (metal cathode flow field plate) according to an embodiment of the present invention;
FIG. 5 is a schematic view of the metallic bipolar plate structure formed by the metallic anode flow field plate and the metallic cathode flow field plate of FIG. 4;
FIG. 6 is a schematic diagram of a Cell structure formed by the flowfield metal bipolar plate of FIG. 5;
fig. 7 is a schematic diagram of a fuel Cell stack structure composed of the unit cells in fig. 6.
Reference numerals in figures 1 to 7 indicate:
1-fuel Cell stack, 10-fuel Cell,
100-metal bipolar plate, 200-metal anode plate, 300-metal cathode plate,
201-four side frames of a metal anode plate, 301-four side frames of a metal cathode plate,
202A-oxidant O2 gas inlet, 202B-oxidant O2 gas outlet,
203A-fuel H2 gas inlet, 203B-fuel H2 gas outlet,
204A-coolant air (water) inlet, 204B-coolant air (water) outlet,
205-positioning and mounting holes of metal anode plates (metal cathode plates),
206-fuel H2 gas flow path, 207-gasket mounting groove,
209-the coolant flow-through channels,
210-thin layer in the composite double-layer structure metal anode plate,
220-thick layer in the composite double-layer structure metal anode plate,
230-a sealing gasket between the metal anode plate and the metal cathode plate,
308-oxidation O2 gas flow path,
310-thin layer in a composite double-layer structure metal cathode plate,
320-thick layer in the composite double-layer structure metal cathode plate,
400-an MEA membrane assembly,
500-MEA membrane assembly sealing ring,
600-Cell isolation seal ring.
Detailed Description
The invention will be explained below by using fig. 1 to fig. 7 and specific examples, which provide a metal bipolar plate of a fuel Cell stack, and a single Cell and a fuel Cell stack formed by the metal bipolar plate of the embodiment.
The invention provides a fuel cell stack metal bipolar plate, which consists of a metal anode flow field plate and a metal cathode flow field plate, wherein the metal anode flow field plate and the metal cathode flow field plate both adopt a composite double-layer structure, the thicker layer is made of a metal material with general corrosion resistance, and the surface and the cold layer of the metal anode flow field plate and the metal cathode flow field plate are made of a metal material with general corrosion resistanceThe coolant air (water)) can be made of various metal materials such as stainless steel, aluminum, copper, titanium, aluminum-magnesium alloy and the like, a thin layer is made of a high-corrosion-resistant metal material, and the surface of the thin layer is in contact with the cathode flow field O2Gas and anode flow field H2The gas contacts with each other, and the fuel cell stack can reliably work and use in an acid environment inside the fuel cell stack for a long time. The metal bipolar plate formed by the metal anode flow field plate and the metal cathode flow field plate with the composite double-layer structure has the advantages of high structural rigidity, good corrosion resistance, good conductivity and heat conductivity and the like. The metal anode flow field plate and the metal cathode flow field plate can be manufactured by adopting a rolling press forming mode and a stamping press forming mode.
Fig. 1 is a schematic diagram of a metal anode flow field plate (metal cathode flow field plate) in a metal bipolar plate of a typical conventional fuel cell stack, and the metal anode flow field plate 200 and the metal cathode flow field plate 300 may have the same flow channel structure or different flow channel structures. The four side frames 201 of the metal anode plate 200 have 4 positioning holes 205 and a sealing ring mounting groove 207 on the surfaces, and the central region of the metal anode plate 200 has fuel H2An air flow channel 206. Fuel H2Gas enters from the inlet 203A, passes through the zigzag flow passage 206, and exits from the outlet 203B. 204A is an inlet for coolant air (water), and after entering the cooling device, the coolant flows out of the outlet 204B to cool the metallic anode plate 200, thereby achieving temperature control. 202A is an oxidant O 2202B is an oxidant O2An outlet of (3). Fuel gas H is generated by a seal ring arranged in the seal ring mounting groove 2072Gas, oxidant O2And coolant air (water) are isolated.
Fig. 2 is a schematic structural view of the metallic bipolar plate 100 formed by the metallic anode flow field plate 200 and the metallic cathode flow field plate 300 in fig. 1; the metal anode plate 200 and the metal cathode plate 300 are assembled, positioned and laminated, the surface of the four side frames 201 of the metal anode plate 200 and the surface of the four side frames 301 of the metal cathode plate 301 are overlapped and pressed, the sealing ring 230 is placed between the four side frames 201 of the metal anode plate 200 and the four side frames 301 of the metal cathode plate 301, the metal anode plate 200 and the metal cathode plate 300 are connected into a whole by welding the edges of the four side frames 201 of the metal anode plate 200 and the four side frames 301 of the metal cathode plate 301, the sealing of the coolant flow channel 209 in the central area between the two sheets of the metal anode plate 200 and the metal cathode plate 300 is.
FIG. 3 is a schematic cross-sectional view of the flow channel structure of the metal anode flow field plate 200 (metal cathode flow field plate 300) of FIG. 1; the metal anode flow field plate (metal cathode flow field plate) can be made of 0.04-0.20 mm stainless steel, aluminum, copper, titanium and aluminum-magnesium alloy metal materials. Four sides of the metal anode plate 200 are frames 201, and the lower surface of the central area of the metal anode plate 200 is fuel H2The upper surface of the air flow channel 206 is a flow channel 209 for coolant air (water) which cools the metal anode flow field plate to control the internal temperature of the fuel Cell and ensure the stable and consistent internal temperature of the fuel Cell stack. When the proton membrane fuel cell works and operates, the metal bipolar plate is in a wet weak acid environment with both strong oxidant and strong reducing gas, and the corrosion resistance of the common metal material is difficult to use for a long time in the weak acid environment, so the metal material for manufacturing the metal bipolar plate needs to be subjected to surface modification, and TiN, TiC, CrN and CrC coating is carried out on the surface of the metal bipolar plate to improve the corrosion resistance of the metal bipolar plate and meet the requirement of long-term stable use.
Fig. 4 is a schematic cross-sectional view of a flow channel structure of a metal anode flow field plate 200 (metal cathode flow field plate 300) according to an embodiment of the present invention; the metal anode flow field plate 200 (metal cathode flow field plate 300) has a composite double-layer structure, wherein the thicker layer 220(320) is made of a metal material with general corrosion resistance, the surface of the metal material is in contact with air (water) in the coolant flow channel 209, and the thinner layer 210(310) is made of a metal material with high corrosion resistance, and the surface of the metal material is in contact with fuel H2H in the gas flow channel 2062Gas (O oxide)2O in the gas flow passage 3082Gas) phase; the composite double-layer metal anode flow field plate 200 (metal cathode flow field plate 300) has high structural rigidity, good corrosion resistance, good conductivity and heat conductivity, and can reliably work in a weak acid environment inside a fuel cell stack for a long time. The invention provides a metal anode plate in a metal bipolar plateThe metal cathode plate and the metal anode plate can be manufactured by adopting a rolling pressing forming mode and a stamping pressing forming mode, and the thicker layer of metal 220(320) in the metal anode plate 200 (in the metal cathode plate 300) with the composite double-layer structure can be made of metal materials such as stainless steel, aluminum, copper, titanium, aluminum-magnesium alloy and the like.
Fig. 5 is a schematic structural view of the metallic bipolar plate 100 formed by the metallic anode flow field plate 200 and the metallic cathode flow field plate 300 in fig. 4. The metal anode plate 200 and the metal cathode plate 300 are assembled, positioned and laminated, the surface of the four side frames 201 of the metal anode plate 200 and the surface of the four side frames 301 of the metal cathode plate 301 are overlapped and pressed, the sealing ring 230 is placed between the two or the four side frames 201 and 301 are welded, the metal anode plate 200 and the metal cathode plate 300 are connected into a whole, the sealing of the coolant flow channel 209 in the central area between the two metal anode plate 200 and the metal cathode plate 300 is realized, and the metal bipolar plate 100 with complete functions is formed.
The metal anode flow field plate 200 has a composite double-layer structure, wherein the thicker layer 220 is made of a metal material with general corrosion resistance, the surface of the thicker layer is in contact with air (water) in the coolant flow channel 209, the thinner layer 210 is made of a metal material with high corrosion resistance, and the surface of the thinner layer is in contact with the fuel H2H in the gas flow channel 2062Gas (O oxide)2O in the gas flow passage 3082Gas) phase; like the metal anode flow field plate 200, the thicker layer 320 of the composite double-layer structure of the metal cathode flow field plate 300 is made of a metal material with general corrosion resistance, the surface of the metal cathode flow field plate is in contact with the air (water) in the coolant flow channel 209, the thinner layer 310 is made of a metal material with high corrosion resistance, and the surface of the metal cathode flow field plate is made of an oxidized O2O in the gas flow passage 3082The gas phase is contacted. The metal anode flow field plate 200 and the metal cathode flow field plate 300 which are made of the composite double-layer structure have high structural rigidity, good corrosion resistance, good electrical conductivity and heat conductivity, and can reliably work in a weak acid environment inside a fuel cell stack for a long time.
Fig. 6 is a schematic structural view of a single Cell formed of the metal bipolar plate in fig. 5. At the center of the fuel Cell100 is an MEA membrane assembly 400Two sides of the upper surface and the lower surface of the component 400 are respectively provided with a metal bipolar plate 100, and an MEA membrane assembly sealing ring 500 is respectively arranged between the metal bipolar plates 100 on the upper side and the lower side and the MEA membrane assembly 400; fuel H is filled between the MEA membrane assembly 400 and the lower surface of the metal anode plate 200 in the upper metal bipolar plate 1002An oxidant O is provided between the gas flow channel 206 and the upper surface of the metal cathode plate 300 in the MEA membrane assembly 400 and the lower metal bipolar plate 1002And an air flow channel 308. The upper and lower isolation seal rings 500 realize the flow channel sealing between the upper and lower metal bipolar plates 100, including the fuel H2 Gas flow channel 206 and oxidant O2 Gas flow channel 308 for ensuring the oxidizing agent O inside the Cell2Gas and fuel H2The gases are mutually isolated, and the possible explosion danger is avoided. A flow channel 209 for coolant air (water) is arranged in the single Cell10, and the introduced coolant air (water) controls the internal temperature of the fuel single Cell to ensure the stable operation of the fuel Cell stack
Fig. 7 is a schematic structural view of the fuel Cell stack 1 including the single Cell10 in fig. 6. According to the specific use requirements (power, voltage) of the fuel Cell stack 1, a plurality of fuel cells 10 need to be stacked and assembled in series to form a complete fuel Cell stack 1. The laminated tandem single cells 10 are supported and isolated from each other by the spacer ring seal 600, and are sealed from each other. The fuel Cell10 is composed of an MEA membrane module 400 and bipolar plates 100 on the upper and lower sides thereof; the fuel Cell10 has a laminated sandwich structure, i.e., an MEA membrane assembly 400 is sandwiched by upper and lower metal bipolar plates 100. The metal anode plate 200 and the metal cathode plate 300 of the metal bipolar plate 100 may be made of various metal materials with good electrical and thermal conductivity, corrosion resistance and heat resistance. When the fuel cell stack 1 operates, the fuel H is introduced into the flow passage 206, the flow passage 308, and the flow passage 209, respectively2Gas, oxidant O2Gas, coolant air (water). An isolating sealing ring 500 is respectively arranged between the upper and lower metal bipolar plates 100 and the MEA membrane assembly 400 to ensure the oxidant O in the fuel Cell102Gas and fuel H2The gases being separated, isolated from each other, otherwiseThe risk of explosion can occur. Meanwhile, in order to control the internal temperature of the fuel Cell10, flowing coolant air (water) is introduced into the coolant flow channel 209, so as to ensure stable and uniform internal temperature of the fuel Cell stack.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings or directly and indirectly applied to the related technical fields are included in the scope of the present invention.
Claims (3)
1. A fuel cell stack metal bipolar plate is composed of a metal anode flow field plate and a metal cathode flow field plate, wherein the metal anode flow field plate and the metal cathode flow field plate both adopt a composite double-layer structure;
2. the fuel cell stack metal bipolar plate of claim 1, wherein a thicker layer of the composite double-layer structure of the metal anode flow field plate and the metal cathode flow field plate is made of a metal material with general corrosion resistance, the surface of the thicker layer is in contact with a coolant air (water) flow field, and the thinner layer is made of a metal material with high corrosion resistance, the surface of the thinner layer is respectively in contact with a fuel gas H of the anode2Oxidant gas O of flow field and cathode2The flow fields are contacted;
3. the fuel cell stack metal bipolar plate of claim 1, wherein the thick layer and the thin layer in the composite double-layer structure of the metal anode flow field plate and the metal cathode flow field plate can be bonded and welded by conductive adhesive to form a member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910263632.XA CN111769301A (en) | 2019-04-02 | 2019-04-02 | Metal bipolar plate of fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910263632.XA CN111769301A (en) | 2019-04-02 | 2019-04-02 | Metal bipolar plate of fuel cell stack |
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| Publication Number | Publication Date |
|---|---|
| CN111769301A true CN111769301A (en) | 2020-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910263632.XA Pending CN111769301A (en) | 2019-04-02 | 2019-04-02 | Metal bipolar plate of fuel cell stack |
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| CN (1) | CN111769301A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113921840A (en) * | 2021-09-29 | 2022-01-11 | 中汽创智科技有限公司 | Bipolar plate and galvanic pile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010033959A1 (en) * | 2000-03-13 | 2001-10-25 | Ovshinsky Stanford R. | Novel fuel cell cathodes and their fuel cells |
| CN101465435A (en) * | 2009-01-15 | 2009-06-24 | 上海交通大学 | Duel-electrode plate multi-channel hunting flow field structure for proton exchange membrane fuel cell |
| CN103633337A (en) * | 2013-12-09 | 2014-03-12 | 新源动力股份有限公司 | A fuel cell metal bipolar plate with enhanced reaction gas distribution |
-
2019
- 2019-04-02 CN CN201910263632.XA patent/CN111769301A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010033959A1 (en) * | 2000-03-13 | 2001-10-25 | Ovshinsky Stanford R. | Novel fuel cell cathodes and their fuel cells |
| CN101465435A (en) * | 2009-01-15 | 2009-06-24 | 上海交通大学 | Duel-electrode plate multi-channel hunting flow field structure for proton exchange membrane fuel cell |
| CN103633337A (en) * | 2013-12-09 | 2014-03-12 | 新源动力股份有限公司 | A fuel cell metal bipolar plate with enhanced reaction gas distribution |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113921840A (en) * | 2021-09-29 | 2022-01-11 | 中汽创智科技有限公司 | Bipolar plate and galvanic pile |
| CN113921840B (en) * | 2021-09-29 | 2023-12-05 | 中汽创智科技有限公司 | Bipolar plate and galvanic pile |
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