CN116598554A - High-integration modularized end plate - Google Patents
High-integration modularized end plate Download PDFInfo
- Publication number
- CN116598554A CN116598554A CN202310767896.5A CN202310767896A CN116598554A CN 116598554 A CN116598554 A CN 116598554A CN 202310767896 A CN202310767896 A CN 202310767896A CN 116598554 A CN116598554 A CN 116598554A
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- China
- Prior art keywords
- plate
- conductive metal
- integration
- resistant
- end plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 61
- 239000002131 composite material Substances 0.000 claims abstract description 35
- 239000004033 plastic Substances 0.000 claims description 15
- 239000012528 membrane Substances 0.000 claims description 11
- 230000010354 integration Effects 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 12
- 239000000110 cooling liquid Substances 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000013585 weight reducing agent Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229920000557 Nafion® Polymers 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
-
- 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
- H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
- H01M8/2475—Enclosures, casings or containers of fuel cell stacks
-
- 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
Abstract
The application relates to a high-integration modularized end plate, which comprises a dummy cell (1), a conductive metal plate (2), an insulating pressure-resistant plate (3) and a composite material plate (4); the conductive metal plate (2) is connected with the dummy cell (1); the conductive metal plate (2), the insulating pressure-resistant plate (3) and the composite material plate (4) are integrally connected. Compared with the prior art, the application has the advantages of reducing the overall weight, reducing the assembly process among a plurality of parts, shortening the production period, avoiding the influence of assembly tolerance on the size of the electric pile, improving the stability of the reactor core of the electric pile, facilitating the large current conduction, avoiding flooding of end batteries, ensuring the consistent performance of each part of batteries in the electric pile, and the like.
Description
Technical Field
The application relates to the field of fuel cells, in particular to a high-integration modularized end plate.
Background
The fuel cell stack is formed by stacking hundreds of single cells, and two ends of each cell are respectively clamped by an air inlet end plate and a blind end plate. The fuel cell end plate is used as a core component of the electric pile, and has good electrical insulation performance and stable mechanical performance; because the space of the electric pile is limited, the volume of the end plate directly influences the volume power density of the electric pile, the traditional end plate metal material has large duty ratio, is not beneficial to the weight reduction of the electric pile, and has single function and is not beneficial to the assembly of the electric pile;
patent CN201922368482.7 discloses a fuel cell comprising a stack and a first dummy cell and a second dummy cell; the stack includes a plurality of stacked unit cells, the first dummy cell being located outside of a first one of the unit cells; the second dummy cell is positioned outside the last single cell; and the cooling liquid inlet and outlet of the first dummy battery and the second dummy battery are smaller than the cooling liquid inlet and outlet of the single battery. According to the technical scheme, the cooling liquid inlet and outlet of the first dummy cell and the cooling liquid inlet and outlet of the second dummy cell are smaller than those of the single cells, so that the flow of the cooling liquid in the first dummy cell and the cooling liquid in the second dummy cell at the edge are reduced, the heat exchange quantity between the first dummy cell and the second dummy cell at the edge and the external environment is reduced, the phenomenon of water accumulation caused by the fact that the temperature of the single cells at the front end and the tail end of the electric pile is too low is avoided, and the running stability of the electric pile is improved. However, the end plate of the patent is a traditional metal end plate, the end plate material has a large duty ratio, is unfavorable for the weight reduction of the electric pile, and has a single function and is unfavorable for the assembly of the electric pile.
Disclosure of Invention
The application aims to overcome the defects of the prior art and provide the high-integration modularized end plate which adopts a high-strength composite material and has the functions of insulation, electric pile flow collection, heating and heat preservation, and improving the air inlet function of the end battery.
The aim of the application can be achieved by the following technical scheme: a high-integration modularized end plate comprises a dummy cell, a conductive metal plate, an insulating pressure-resistant plate and a composite material plate; the conductive metal plate is connected with the dummy battery; the conductive metal plate, the insulating pressure-resistant plate and the composite material plate are integrally connected.
Further, the dummy battery comprises a single-piece or multi-piece dummy battery.
Further, the dummy cell is composed of a cathode plate and an anode plate which are clamped with a dummy membrane electrode, wherein the dummy membrane electrode is a breathable and waterproof membrane, such as a commercially available Nafion membrane, and three inlets and three outlets are respectively arranged at two ends of the dummy cell.
Further, a locating groove or a locating protrusion which is matched with each other is arranged between the conductive metal plate and the insulating pressure-resistant plate, so that the conductive metal plate and the insulating pressure-resistant plate are mutually restrained, a shearing-resistant structure is formed, and the stability of a reactor core of the electric pile is improved.
Further, the conductive metal plate is connected with the dummy battery through welding, so that no gap and no contact resistance loss between the battery and the conductive metal are ensured.
Further, the conductive metal plate, the insulating pressure-resistant plate and the composite material plate are connected in a mode of mould pressing, bonding, welding, injection molding, snap fit, threaded connection or the like.
Further, the insulating pressure-resistant plate is made of plastic; the composite material plate is made of carbon fiber glass fiber resin.
Further, a space for accommodating the dummy battery and the conductive metal plate is arranged on one side of the insulating pressure-resistant plate; the dummy cell, the conductive metal plate, the insulating pressure-resistant plate and the composite material plate form an integrated end plate; one side of the conductive metal plate extends out of a metal conductive plate.
Further, the end plate is composed of the conductive metal plate (2), the insulating pressure-resistant plate (3) and the composite material plate (4): end plate creepage distance = shortest distance of plastic to metal plate surface through plastic at plastic and collector plate contact surface.
The end plate of the application is a modularized end plate: the end plate is wholly insulated, has no creepage distance and no conduction problem, and has the weight reduction mainly that the density of composite materials is smaller by 1.5-1.7g/cm 3 Aluminum alloy 2.7g/cm 3 The composite material with the same volume has lighter weight and higher strength.
Further, the end plate is an air inlet plate or a blind end plate.
According to the application, the metal part of the end plate is replaced by the high-strength carbon fiber glass fiber composite material, so that the mechanical strength of the end plate is improved, and the weight and the volume of the end plate are reduced; the positioning and mounting of the metal and the insulator are realized by designing a fastening structure between the end plate insulating region and the current collecting conductive region; the integrated design of insulation and conduction is realized through the integration of the conductive metal, the insulating plastic and the composite material; by welding the dummy cell on the conductive metal, the end plate has the function of improving the air inlet of the end cell, and the high-integration design improves the assembly efficiency of the electric pile.
Compared with the prior art, the application has the following beneficial aspects:
1 the plastic part of the end plate designed by the application is molded with light composite materials such as carbon fiber glass fiber resin and the like, so that the strength requirement of the deformation of the end plate can be met.
The end plate is a modularized part formed by combining composite materials, insulating plastic conductive metals and pseudo batteries into a whole, is a highly integrated end plate, reduces the assembly process among a plurality of parts, shortens the production period, and avoids the influence of assembly tolerance on the size of a galvanic pile.
And 3, the shearing-resistant design is adopted between the conductive metal and the insulating plastic designed by the end plate, so that the insulating part and the metal part are mutually restrained, a shearing-resistant structure is formed, and the stability of a reactor core of the electric pile is improved.
And 4, the conductive metal of the end plate and the dummy cell are connected by adopting a welding process, so that no assembly gap between the dummy cell and the conductive metal is ensured, contact resistance is avoided, and large current conduction is facilitated.
The dummy cell integrated by the end plate design of the application consists of a cathode plate, an anode plate and a dummy membrane electrode, and is characterized in that the dummy cell can conduct current, and a single dummy cell only allows the anode gas or the cathode gas to pass through independently. The dummy cell structure integrated by the end plate is beneficial to drainage of cells at two ends of the electric pile, prevents liquid water condensed at the end liquid part of the electric pile from directly flowing into the cells for reaction power generation, avoids flooding of the cells at the end part, prevents uneven gas distribution, and ensures consistent performance of the cells at each part in the electric pile.
Drawings
FIG. 1 is a schematic diagram of a highly integrated fuel cell stack end plate;
FIG. 2 is an exploded view of a high integration fuel cell stack end plate;
FIG. 3 is a top view of a high integration fuel cell stack end plate;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is an exploded view of a high integration fuel cell stack end plate dummy cell;
FIG. 6 is an exemplary view of an intake end plate;
the figure indicates: 1-pseudo battery, 2-conductive metal plate, 3-insulating pressure-resistant plate, 4-composite material plate, 5-positioning groove, 6-positioning bulge, 7-cooling water inlet and outlet, 8-air inlet and outlet, and 9-hydrogen inlet and outlet.
Detailed Description
The application will now be described in detail with reference to the drawings and specific examples.
Example 1:
the end plate of the high-integration fuel cell stack has a specific structure shown in figures 1-4, and comprises a dummy cell 1, a conductive metal plate 2, an insulating pressure-resistant plate 3 and a composite material plate 4; the conductive metal plate 2 is connected with the dummy cell 1; the conductive metal plate 2, the insulating pressure-resistant plate 3 and the composite material plate 4 are integrally connected.
The dummy cell 1 described in the present embodiment is a single-piece dummy cell. The false battery 1 is composed of a negative plate and an anode plate which are clamped with a false membrane electrode, wherein the false membrane electrode is a breathable and waterproof commercial Nafion membrane. The two ends of the dummy cell 1 are respectively provided with three inlets and three outlets: the cooling water inlet and outlet 7, the air inlet and outlet 8 and the hydrogen inlet and outlet 9 are beneficial to drainage of cells at two ends of the electric pile, liquid water condensed at the end liquid part of the electric pile is prevented from directly flowing into the cells for reaction power generation, flooding of the cells at the end part is avoided, uneven gas distribution is prevented, and the consistent performance of the cells at each part in the electric pile is ensured.
The positioning grooves or positioning protrusions which are matched with each other are arranged between the conductive metal plate 2 and the insulating pressure-resistant plate 3, so that the conductive metal plate 2 and the insulating pressure-resistant plate 3 are mutually restrained, a shearing-resistant structure is formed, and the stability of a reactor core of the electric pile is improved; in this embodiment, the conductive metal plate 2 is provided with a positioning groove 5, the insulating pressure-resistant plate 3 is provided with a positioning protrusion 6, and the positioning protrusion 6 is engaged with the positioning groove 5, so that the two parts are freely limited in the plane direction of the battery, and the vibration and impact resistance of the galvanic pile is enhanced, as shown in fig. 4.
One side of the insulating pressure-resistant plate 3 is connected with the composite material plate 4, and the other side is provided with a space for accommodating the dummy cell 1 and the conductive metal plate 2; the dummy cell 1, the conductive metal plate 2, the insulating pressure-resistant plate 3 and the composite material plate 4 form an integrated end plate; the conductive metal plate 2, the insulating pressure-resistant plate 3 and the composite material plate 4 are connected through mould pressing, the conductive metal plate 2 is welded with the dummy cell 1, no assembly gap between the dummy cell and the conductive metal is ensured, namely the conductive metal plate is an integral body, and no contact resistance loss exists, as shown in fig. 4; a notch is arranged on one side of the insulating pressure-resistant plate 3, a metal conducting plate extends out of the notch from the conducting metal plate 2, and current collected by the fuel cell on the conducting metal plate 2 is connected with the conducting copper bar through the structure and is led out;
in this embodiment, the insulating pressure-resistant plate 3 is made of high-insulation plastic; the composite material plate 4 is made of carbon fiber glass fiber and resin, wherein the insulating performance of the insulating pressure-resistant plate is 1000V/DC, more than 60s, the limit value is more than or equal to 1GΩ, the compressive strength is more than or equal to 2700V/DC, more than 2s, and the leakage current is less than or equal to 1mA; the mechanical strength of the composite material plate 4 is that the tensile strength is more than 500MPa, and the modulus is 30GPa.
The end plates are blind plates in this embodiment.
Example 2
In this embodiment, the dummy cell is formed by stacking three sheets, as shown in fig. 5: the dummy battery includes a dummy battery 11, a dummy battery 12, and a dummy battery 13.
In the present embodiment, the conductive metal plate 2, the insulating pressure-resistant plate 3, and the composite material plate 4 are provided at both ends with three inlets and three outlets corresponding to the dummy cell, and thus the end plate is an air inlet end plate in the present embodiment. The procedure is as in example 1.
In this embodiment, the insulating pressure-resistant plate 3 is made of plastic; the composite material plate 4 is made of carbon fiber glass fiber resin, wherein the insulating performance of the insulating pressure-resistant plate is 1000V/DC, the limit value is more than or equal to 500MΩ, the compressive strength is more than or equal to 2700V/DC, the leakage current is more than or equal to 2s, and the leakage current is less than or equal to 1MA; the mechanical strength of the composite material plate 4 is that the tensile strength is more than 500MPa, and the modulus is 30GPa.
Comparative example
The common metal end plate is used as a comparative example, and structures such as a current collecting structure, a false battery and the like are not used.
The end plates of examples 1-2 above were stacked with fuel cells and tested for performance as follows:
fuel cell core insulation test: and (3) regulating the voltage to 1000V by adopting an insulation resistance tester, and clamping a positive terminal metal clamp of the insulation resistance tester on the positive electrode of the output electrode lug of the pile, and clamping a negative terminal on a composite material region (a metal region of the end plate of the pile).
Test results:
end plates described in examples 1-2 (metal + plastic end plates): end plate creepage distance = shortest distance from contact surface of plastic and current collecting plate to outer surface of metal plate through plastic
The modular end plates of examples 1-2: the end plate is wholly insulated, the creepage distance of the end plate is not existed, the problem of conductivity is not existed, and if the same plastic plate as the metal end plate is used, the composite material plate can be understood as using insulating material to replace the metal plate.
The weight reduction is mainly that the density of the composite material is smaller by 1.5-1.7g/cm 3 Aluminum alloy 2.7g/cm 3 The composite material with the same volume has lighter weight and higher strength.
The foregoing basic embodiments of the application, as well as other embodiments of the application, can be freely combined to form numerous embodiments, all of which are contemplated and claimed. In the scheme of the application, each selection example can be arbitrarily combined with any other basic example and selection example.
Note that the above is only a preferred embodiment of the present application and the technical principle applied. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, while the application has been described in connection with the above embodiments, the application is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the application, which is set forth in the following claims.
Claims (10)
1. The high-integration modularized end plate is characterized by comprising a dummy cell (1), a conductive metal plate (2), an insulating pressure-resistant plate (3) and a composite material plate (4); the conductive metal plate (2) is connected with the dummy cell (1); the conductive metal plate (2), the insulating pressure-resistant plate (3) and the composite material plate (4) are integrally connected.
2. A modular end plate of high integration according to claim 1, wherein said dummy cell (1) comprises a single or multiple dummy cells.
3. The high-integration modularized end plate according to claim 1 or 2, wherein the dummy cell is composed of a cathode plate and an anode plate which are sandwiched by dummy membrane electrodes, wherein the dummy membrane electrodes are breathable and waterproof membranes, and three inlets and three outlets are respectively arranged at two ends of the dummy cell (1).
4. The high-integration modularized end plate according to claim 1, wherein a positioning groove or a positioning protrusion matched with each other is arranged between the conductive metal plate (2) and the insulating pressure-resistant plate (3), so that the conductive metal plate (2) and the insulating pressure-resistant plate (3) are mutually restrained to form a shearing-resistant structure.
5. The high-integration modularized end plate according to claim 1, wherein the conductive metal plate (2) is connected with the dummy cell (1) by welding, thereby ensuring no gap and no contact resistance loss between the cell and the conductive metal.
6. A modular end plate of high integration according to claim 1, wherein the conductive metal plate (2), the insulating pressure resistant plate (3) and the composite plate (4) are connected by molding, bonding, welding, injection molding, snap-fitting, or screwing.
7. The high-integration modularized end plate according to claim 1, wherein the insulating pressure-resistant plate (3) is made of plastic; the composite material plate (4) is made of carbon fiber glass fiber resin.
8. The high-integration modularized end plate according to claim 1, wherein a space for accommodating the dummy cell (1) and the conductive metal plate (2) is arranged on one side of the insulating pressure-resistant plate (3); the fake battery (1), the conductive metal plate (2), the insulating pressure-resistant plate (3) and the composite material plate (4) form an integrated end plate.
9. A modular endplate according to claim 1, wherein the endplate itself is entirely insulated.
10. The high integration modular endplate of claim 1, wherein the endplate is an intake plate or a blind end endplate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310767896.5A CN116598554A (en) | 2023-06-27 | 2023-06-27 | High-integration modularized end plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310767896.5A CN116598554A (en) | 2023-06-27 | 2023-06-27 | High-integration modularized end plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116598554A true CN116598554A (en) | 2023-08-15 |
Family
ID=87595843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310767896.5A Pending CN116598554A (en) | 2023-06-27 | 2023-06-27 | High-integration modularized end plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116598554A (en) |
-
2023
- 2023-06-27 CN CN202310767896.5A patent/CN116598554A/en active Pending
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