CN117577904A - Refurbishable fuel cell structure and processing technology thereof - Google Patents
Refurbishable fuel cell structure and processing technology thereof Download PDFInfo
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- CN117577904A CN117577904A CN202311423646.6A CN202311423646A CN117577904A CN 117577904 A CN117577904 A CN 117577904A CN 202311423646 A CN202311423646 A CN 202311423646A CN 117577904 A CN117577904 A CN 117577904A
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- 239000000446 fuel Substances 0.000 title claims abstract description 43
- 238000005516 engineering process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000012528 membrane Substances 0.000 claims description 75
- 238000009792 diffusion process Methods 0.000 claims description 51
- 238000007789 sealing Methods 0.000 claims description 30
- 239000003292 glue Substances 0.000 claims description 20
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 238000001746 injection moulding Methods 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 238000009419 refurbishment Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000012943 hotmelt Substances 0.000 claims description 3
- 238000010023 transfer printing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- 230000002902 bimodal effect Effects 0.000 claims 1
- 230000002194 synthesizing effect Effects 0.000 claims 1
- 210000004027 cell Anatomy 0.000 abstract description 61
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 210000003850 cellular structure Anatomy 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 41
- 238000004026 adhesive bonding Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000009418 renovation Methods 0.000 description 2
- 206010011906 Death Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
-
- 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
- H01M8/008—Disposal or recycling 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
-
- 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
- H01M8/2404—Processes or apparatus for grouping 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
-
- 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 invention discloses a refurbishable fuel cell structure and a processing technology thereof, belonging to the processing and preparation technology of fuel cells. The fuel cell combines the half cell component and the CCM component, so that the half cell component can be reused in the renewing process, the production cost and the use cost of the existing fuel cell are reduced, and meanwhile, the structures of the half cell component and the CCM component are adjusted and designed, so that the compatibility of the single cell assembly production and the tooling process is realized.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a refurbishable fuel cell structure and a processing technology thereof.
Background
The stack is the heart of a PEM hydrogen fuel cell system and typically represents more than 50% of the total system cost. While known as one of the hopes and ultimate solutions to solve the excessive dependence of society on fossil fuels, the high cost is the soft rib at the end of the fuel cell application, limiting its widespread use in numerous fields.
In terms of cost, the cost of a commercial stack is calculated as the cost of material per kilowatt at rated power. Pile prices have been decreasing at a rate of 20% or more per year over the last three years; the current batch (1000) cost is approximately 1000 yuan per kw. For a pile rated at 100kW, the batch cost of each pile is 10 ten thousand yuan, and the direct selling price is about 15 to 16 ten thousand yuan after considering labor, depreciation, transportation, tax rate and profit. Many potential customers will choose to wait because of such high prices, which is detrimental to the widespread use of PEM fuel cells. Therefore, the invention aims to design a galvanic pile which can cause great cost reduction. The goal is to reduce the application threshold of fuel cells, and to penetrate hydrogen fuel cell technology into more scenes and industries.
The fuel cell stack is produced by packaging up to several tens to several hundreds of unit cells (a combination of bipolar plates and membrane electrodes) and mounting plates, collector plates, insulating plates, tail plates, etc. under pressure to form the stack. At present, the production of electric piles is still in the early stage of industry, and each electric pile is designed with a new polar plate and a new membrane electrode or a single cell assembly formed by combining a group of bipolar plates and a group of membrane electrodes according to the application scene requirements of customers, namely customization. However, the customization also brings difficulty in product management, and causes that the production line, the jig and the tooling for producing each generation of products are not compatible, thereby causing waste. The industry specifies that the lifetime of a stack is such that the monolithic voltage drops to 90% of the initial state at rated current. Therefore, when the stack reaches the end-of-life goal, it is often used to replace a new cell, or even the entire stack. In terms of stack cost, the adoption of customization and non-reuse of certain components is not a factor in the high stack cost, in addition to the fact that the stack components have not yet been scaled up.
The main components of the galvanic pile in the existing design scheme are divided into a membrane electrode, a bipolar plate, a sealing ring and a machined part. In general, the lifetime of bipolar plates and machined parts can greatly exceed the lifetime of membrane electrodes. The bipolar plate and the machined part are thus components of the invention intended to achieve recycling. In addition, a typical membrane electrode assembly consists of a proton membrane-cathode catalyst assembly (CCM) consisting of cathode and anode gas diffusion layers and a frame. In which the life of the membrane electrode is short due to the influence of various manufacturing processes and operating conditions, the membrane electrode is a component that should be replaced at the time of refurbishment. Again, to ensure the reliability of the refurbished stack, the sealing rings should also be replaced at the same time. Despite the limited data available, the old gas diffusion layers have the potential to be reused. In summary, the object of the present invention is to reduce the cost of a stack by a greater extent than would be expected in the market by recycling certain stack components. If certain components are reusable multiple times for integration of multiple refurbished stacks, this would be compounded by the reduction in stack costs.
Disclosure of Invention
The invention aims to: the invention provides a refurbished fuel cell structure, which comprises two single cell structures of a frame type and a frameless type and provides a processing technology of the refurbished cell structure.
In order to achieve the above object, the present invention provides the following technical solutions.
A frame type single cell structure comprises a polar plate assembly and a membrane electrode assembly;
the polar plate assembly comprises a group of bipolar plates containing sealing rings, and anode and cathode gas diffusion layers are respectively arranged on the cathode surface and the anode surface of the bipolar plates; the anode and cathode gas diffusion layers cover the polar plate flow channel region and correspond to the active region of the CCM;
the membrane electrode assembly comprises a membrane electrode frame and a CCM component, and the membrane electrode frame is bonded with the CCM based on a single side frame; the membrane electrode frame and the CCM adhesive are provided with an anode yielding groove and a cathode yielding groove on the anode plate and the anode plate which are matched with the membrane electrode frame and the CCM adhesive, and the membrane electrode frame and the CCM adhesive are used for realizing the balance of the internal structure of the single cell of the fuel cell.
A frame-free single cell structure comprises a polar plate assembly and a membrane electrode assembly;
the electrode plate assembly comprises a group of bipolar plates containing cathode sealing rings, an anode and a cathode gas diffusion layer are respectively arranged on the cathode surface and the anode surface of the bipolar plates, and a membrane electrode frame is also adhered and arranged on the electrode plate assembly;
the membrane electrode assembly comprises a CCM component, and glue is dispensed or glued on the PEN membrane to realize bonding of the CCM.
The refurbished fuel cell structure is realized based on the frame type single cell structure and the frame-free single cell structure, and comprises a group of single cell structures and more than one single cell structure, wherein each single cell comprises a polar plate assembly and a membrane electrode assembly, and corresponding gas diffusion layers are integrally arranged on an anode surface and a cathode surface of a bipolar plate in the polar plate assembly;
the bonding between the gas diffusion layer and the surface of the polar plate comprises the steps of spraying glue and carrying out bonding based on hot melt glue, wherein the bonding area between the gas diffusion layer and the surface of the polar plate is positioned in the area of 0.1mm-0.2mm of the periphery of the gas diffusion layer, and the bonding area sinks by 0.06mm-0.08mm.
Further, the molding mode of the sealing ring of the bipolar plate comprises injection molding, dispensing or transfer printing. The sealing ring arranged on the cathode plate comprises a single peak or a double peak.
Further, the bipolar plate is prepared by cooling and bonding a cathode plate and an anode plate.
The fuel cell structure is characterized in that a gas diffusion layer is arranged on a polar plate in a polar plate assembly, the polar plate assembly does not contain the gas diffusion layer, the polar plate assembly is used for reutilization in the fuel cell renovation process, and the membrane electrode is replaced in the fuel cell renovation process.
The fuel cell structure has reusable components and replaceable components, the reusable components are pole plate assemblies, and membrane electrodes are replaced to realize refurbishment of the fuel cell.
Based on the processing of the fuel cell, the invention provides a synthesis processing technology of a refurbishable fuel cell, which comprises the following steps:
s1, designing a membrane electrode frame and cutting to enable the membrane electrode frame to meet the requirements of a CCM component;
s2, designing the shape of a sealing ring and an injection mold according to the sealing groove and the stacking pressure of the bipolar plate, and forming the sealing ring on the membrane electrode frame in an injection molding mode to form a sealing ring-frame assembly;
s3, bonding the CCM to the pre-cut membrane electrode frame window to form an injection molding CCM assembly;
s4, sticking the gas diffusion layer to the injection molding CCM component to form a membrane electrode assembly;
and S5, combining the membrane electrode assembly and the half cell assembly to obtain the electric pile structure of the fuel cell.
Further, the bipolar plate in the step S2 is obtained by bonding cooling surfaces of the anode plate and the cathode plate, and a sealing strip is injection molded or a glue line is transplanted on the bipolar plate; then cutting and forming the gas diffusion layer; and finally, spraying glue or back glue on the bipolar plate, and attaching the cut cathode and anode gas diffusion layers on two sides of the bipolar plate.
The beneficial effects are that: compared with the prior art, the novel turnover fuel cell structure provided by the invention enables part of single cells and parts to be reused when the electric pile reaches the end life, thereby prolonging the service cycle of the electric pile and reducing the manufacturing cost of the electric pile from the aspect of the use cost. In addition, the invention aims at the operation difficulty of renewing and recycling, realizes the integrated design of the structures of the half-cell component and the membrane electrode component, and improves the compatibility of product production and tools.
Drawings
FIG. 1 is a schematic structural view of a plate assembly;
FIG. 2 is a schematic view of a membrane electrode frame and a relief groove thereof;
FIG. 3 is a schematic diagram of the combination of a CCM assembly and a membrane electrode frame in a frame-type cell structure;
FIG. 4 is a schematic illustration of the bonding structure of the seal ring with the bipolar plate and gas diffusion layer;
fig. 5 is a schematic view of a cell structure;
FIG. 6 is a schematic diagram of the structure of a CCM assembly in a frameless cell structure;
FIG. 7 is a schematic view of a production flow of a frame-type cell structure;
FIG. 8 is a schematic illustration of a production flow of a frameless cell structure;
FIG. 9 is a schematic illustration of bipolar plate-injection molded membrane electrode assembly;
fig. 10 is a process flow diagram for making an injection molded membrane electrode.
In the figure: 1. polar plate assembly, 2, cathode seal circle (point is glued), 3, anode seal circle (point is glued), 4, cathode gas diffusion layer, 5, anode gas diffusion layer, 6, membrane electrode frame, 7, CCM,8, anode gas diffusion layer gluing agent, 9, cathode gas diffusion layer gluing agent, 10, anode abdication groove, 11, cathode abdication groove, 12, cathode injection molding seal circle, 13, anode injection molding seal circle, 14, injection molding membrane electrode assembly, 15, anode gluing agent, 16, CCM gluing agent.
Detailed Description
For a detailed description of the technical solution of the present invention, the following description is further presented with reference to the accompanying drawings.
The main components of the current fuel cell stack comprise membrane electrodes, bipolar plates, sealing rings and machining parts, are also composed of tens to hundreds of groups of single cells, are packaged under pressure by combining a mounting plate, a current collecting plate, an insulating plate, a tail plate and the like to form the stack, and CCM is a commonly-called three-in-one component in the fuel cell membrane electrodes and is composed of a proton membrane and catalytic layers on two sides, and the combining mode comprises transfer printing, spraying and coating methods.
Example 1
Based on the above prior art, the present invention firstly provides a frame type single cell structure, which is mainly formed by combining a half cell component and a CCM component. The half cell assembly is basically a plate assembly 1 comprising bipolar plates which are cooled and bonded by cathode and anode plates. A cathode sealing ring 2 (arranged in a dispensing mode) is arranged on the cathode surface of the bipolar plate and is used for sealing the cathode gas diffusion layer 4. Anode gas diffusion layers 5 and anode sealing rings 3 (dispensing) are arranged on the anode surface of the bipolar plate.
The half cell assembly will be recycled into the refurbished stack and the framed CCM between the two sets of half cells will be replaced during the refurbishment process, as shown in fig. 1. Considering the number of repeated unstacking, the design life of the half cell assembly is 10-100 unstacking based on the number of unstacking.
As shown in fig. 2, the anode gas diffusion layer 5 and the cathode gas diffusion layer 4 are bonded to the surface of the electrode plate assembly 1 by an anode gas diffusion layer adhesive 8 and a cathode gas diffusion layer adhesive 9, respectively. The gas diffusion layer covers the polar plate runner area and corresponds to the active area of the CCM. The gas diffusion layer and the surface of the polar plate have various bonding modes, including glue spraying and back glue based on hot melt glue. The bonding is limited to the area of about 0.1-0.2mm of the periphery of the gas diffusion layer, and the bonding area sinks about 0.06-0.08 mm, so that the half-cell assembly is convenient for accommodating the bonding adhesive and the membrane electrode frame. The surface of the polar plate assembly 1 is also provided with an anode abdication groove 10 and a cathode abdication groove 11 which are used for combining the adhesive and the membrane electrode frame. The anode gas diffusion layer adhesive 8 and the cathode gas diffusion layer adhesive 9 are correspondingly attached to the CCM7, namely, the components comprising the CCM7 and the membrane electrode frame 6 form a frame type CCM7.
The frame type single cell structure combined with fig. 3 refers to that a frame type CCM7 is adopted, a membrane electrode frame is arranged in a membrane electrode assembly, and the CCM7 is bonded on a pre-cut single-side frame window structure based on a single-side frame technology. The frame CCM7 differs from the membrane electrode assembly in that it does not contain a gas diffusion layer, since the gas diffusion layer is disposed on the half cell plate, thereby avoiding the need to arrange a different gas diffusion layer in conjunction with the CCM components during subsequent manufacturing processes.
Further, in fig. 4, the seal ring in the half cell assembly may be molded in a manner well known in the art, and may be injection molded directly onto the bipolar plate, or may be molded by a transfer process, or may be molded by a dispensing process. It is noted that the shape of the cathode face seal ring and the shape of the anode face must be different to avoid misalignment due to tolerances or external forces during stack assembly and stack compression, creating shear stress to the CCM.
In practical applications, the seal ring forms an assembly with the bipolar plate and gas diffusion layer, and is not replaced during the refurbishment process.
The manufacturing process of the half-cell capable of being recycled is to firstly prepare the bipolar plate; injection molding a sealing strip or a glue line on the bipolar plate; then cutting and forming the gas diffusion layer; and finally, spraying glue or back glue on the bipolar plate, and attaching the cut cathode and anode gas diffusion layers on two sides of the bipolar plate. The production process is shown in fig. 7.
The manufacturing flow of the replaced frame type CCM is as follows: firstly, preparing a conventional CCM; cutting the frame into a required shape; finally, the CCM is attached to the frame as shown in FIG. 8 below.
Example 2
The half-cell membrane electrode frame assembly is a group of bipolar plates containing cathode and anode sealing rings, the gas diffusion layers are adhered to the membrane electrode frame, the membrane electrode frame is adhered to the polar plate assembly with the anode or cathode sealing rings, the membrane electrode frame is sprayed with glue or glued with a frameless CCM, and the other surface of the cathode or anode plate is adhered with the corresponding gas diffusion layer.
The half cell assemblies will be recycled into the refurbished stack and the frameless CCM between the two sets of half cell assemblies will be replaced during the refurbishment process, as shown in fig. 5 and 6. The half cell assembly design life is 10-100 unstacks considering the number of repeated unstacks.
Example 2 is mainly a half cell-frameless CCM structure, which is based on single frame technology, dispensing or spraying glue on the PEN membrane of the half cell, and then bonding the CCM. The frameless CCM differs from the membrane electrode assembly in that it is frameless and does not contain a gas diffusion layer, since the frames and gas diffusion layer are disposed on the half cell plates.
Example 3
The electrode plate assembly 1 is a component formed by bonding a cathode plate and an anode plate on a cooling surface, and the injection molded membrane electrode assembly 14 is a component integrated by the CCM7, a frame and a sealing ring. Wherein the bipolar plate assembly is designed to be reusable and the injection molded membrane electrode assembly is replaced during the refurbishment process. The invention will be prone to failure in two components: the membrane electrode assembly and the seal ring are combined into one component, which facilitates the replacement process when refurbishing the stack, as shown in fig. 9.
The process for bipolar plate-injection molded membrane electrode assembly is shown in fig. 10.
The method for manufacturing the injection molded membrane electrode comprises the following steps: firstly, designing the shape of a sealing ring and an injection mold according to the sealing groove and the stacking pressure of the polar plate, and then forming the sealing ring on a frame which is cut in advance through an injection molding process, and forming a sealing ring-frame assembly. The CCM is then bonded to the pre-cut bezel window to form an injection molded CCM assembly. Finally, the gas diffusion layer is adhered to the injection molded CCM component to form the membrane electrode assembly 14.
The invention processes the replaced high-value components in the old pile, such as CCM and polar plate, according to the disclosed gradient utilization technology, such as recovering precious metals and improving polar plate performance, thereby ensuring that the value of the components is reserved to the maximum extent so as to reduce the pile cost.
Claims (10)
1. The frame type single cell structure is characterized by comprising a polar plate assembly and a membrane electrode assembly;
the polar plate assembly comprises a group of bipolar plates containing sealing rings, and anode and cathode gas diffusion layers are respectively arranged on the cathode surface and the anode surface of the bipolar plates; the anode and cathode gas diffusion layers cover the polar plate flow channel region and correspond to the active region of the CCM;
the membrane electrode assembly comprises a membrane electrode frame and a CCM component, and the membrane electrode frame is bonded with the CCM based on a single side frame; the membrane electrode frame and the CCM adhesive are provided with an anode yielding groove and a cathode yielding groove on the anode plate and the anode plate which are matched with the membrane electrode frame and the CCM adhesive, and the membrane electrode frame and the CCM adhesive are used for realizing the balance of the internal structure of the single cell of the fuel cell.
2. The frame-free single cell structure is characterized by comprising a polar plate assembly and a membrane electrode assembly;
the electrode plate assembly comprises a group of bipolar plates containing cathode sealing rings, an anode and a cathode gas diffusion layer are respectively arranged on the cathode surface and the anode surface of the bipolar plates, and a membrane electrode frame is also adhered and arranged on the electrode plate assembly;
the membrane electrode assembly comprises a CCM component, and is used for dispensing glue on the PEN membrane or bonding the CCM.
3. A refurbished fuel cell structure according to claim 1 or 2, comprising a group of and more than one cell structure, said cells comprising a plate assembly and a membrane electrode assembly, characterized in that in said plate assembly, the anode and cathode faces of the bipolar plates are integrally provided with respective gas diffusion layers;
the bonding between the gas diffusion layer and the surface of the polar plate comprises the steps of spraying glue and carrying out bonding based on hot melt glue, wherein a bonding area between the gas diffusion layer and the surface of the polar plate is positioned in an area with the periphery of 0.1mm-0.2mm, and the bonding area sinks for 0.06mm-0.08mm;
the single cell structure is a frame type single cell structure or a frameless type cell structure.
4. The refurbished fuel cell structure of claim 3, wherein the seal ring of the bipolar plate is molded by injection molding, dispensing, or transfer printing.
5. The refuelable fuel cell structure of claim 3, wherein the seal ring on the cathode plate comprises a seal ring configured as either unimodal or bimodal.
6. The refurbished fuel cell structure of claim 3, wherein the bipolar plate is fabricated by cooling and bonding of the cathode and anode plates.
7. The refurbished fuel cell structure of claim 3, wherein the fuel cell structure diffuses gas to a plate disposed in a plate assembly, wherein the plate assembly does not contain gas diffusion, wherein the plate assembly is used for reuse in a fuel cell refurbishment process, wherein the membrane electrode is replaced in the fuel cell refurbishment process.
8. A refurbished fuel cell structure as in claim 3, wherein the fuel cell structure has reusable components and replaceable components, the reusable components being a plate assembly, the membrane electrode being replaced to refurbish the fuel cell.
9. The synthesis processing technology of the refurbishable fuel cell is characterized by comprising the following steps of:
s1, designing a membrane electrode frame and cutting to enable the membrane electrode frame to meet the requirements of a CCM component;
s2, designing the shape of a sealing ring and an injection mold according to the sealing groove and the stacking pressure of the bipolar plate, and forming the sealing ring on the membrane electrode frame in an injection molding mode to form a sealing ring-frame assembly;
s3, bonding the CCM to the pre-cut membrane electrode frame window to form an injection molding CCM assembly;
s4, sticking the gas diffusion layer to the injection molding CCM component to form a membrane electrode assembly;
and S5, combining the membrane electrode assembly and the half cell assembly to obtain the electric pile structure of the fuel cell.
10. The process for synthesizing a refurbished fuel cell according to claim 9, wherein the bipolar plate in step S2 is obtained by bonding the cooling surfaces of the anode plate and the cathode plate, and a sealing strip is injection-molded or a glue line is transplanted on the bipolar plate; then cutting and forming the gas diffusion layer; and finally, spraying glue or back glue on the bipolar plate, and attaching the cut cathode and anode gas diffusion layers on two sides of the bipolar plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311423646.6A CN117577904A (en) | 2023-10-31 | 2023-10-31 | Refurbishable fuel cell structure and processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311423646.6A CN117577904A (en) | 2023-10-31 | 2023-10-31 | Refurbishable fuel cell structure and processing technology thereof |
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| Publication Number | Publication Date |
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| CN117577904A true CN117577904A (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311423646.6A Pending CN117577904A (en) | 2023-10-31 | 2023-10-31 | Refurbishable fuel cell structure and processing technology thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010054305A1 (en) * | 2010-12-13 | 2012-06-14 | Daimler Ag | Fuel cell stack e.g. polymer electrolyte membrane (PEM) fuel cell stack has gas diffusion layers fixed on adjacent bipolar plate and formed with stabilization layers |
| CN215527767U (en) * | 2021-06-29 | 2022-01-14 | 鸿基创能科技(广州)有限公司 | Assembly structure of membrane electrode and bipolar plate and electric pile comprising assembly structure |
| CN114068980A (en) * | 2021-11-03 | 2022-02-18 | 江苏耀扬新能源科技有限公司 | Single cell based on fuel cell stack process and manufacturing method thereof |
| CN114447359A (en) * | 2022-01-26 | 2022-05-06 | 同济大学 | Gas diffusion layer structure integrated with reaction gas flow channel, bipolar plate and fuel cell |
| CN115632137A (en) * | 2022-10-21 | 2023-01-20 | 深圳深科鹏沃科技有限公司 | Integrated single cell packaging method, integrated single cell and fuel cell stack |
-
2023
- 2023-10-31 CN CN202311423646.6A patent/CN117577904A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010054305A1 (en) * | 2010-12-13 | 2012-06-14 | Daimler Ag | Fuel cell stack e.g. polymer electrolyte membrane (PEM) fuel cell stack has gas diffusion layers fixed on adjacent bipolar plate and formed with stabilization layers |
| CN215527767U (en) * | 2021-06-29 | 2022-01-14 | 鸿基创能科技(广州)有限公司 | Assembly structure of membrane electrode and bipolar plate and electric pile comprising assembly structure |
| CN114068980A (en) * | 2021-11-03 | 2022-02-18 | 江苏耀扬新能源科技有限公司 | Single cell based on fuel cell stack process and manufacturing method thereof |
| CN114447359A (en) * | 2022-01-26 | 2022-05-06 | 同济大学 | Gas diffusion layer structure integrated with reaction gas flow channel, bipolar plate and fuel cell |
| CN115632137A (en) * | 2022-10-21 | 2023-01-20 | 深圳深科鹏沃科技有限公司 | Integrated single cell packaging method, integrated single cell and fuel cell stack |
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