CN110752387B - Single cell of proton exchange membrane fuel cell and method for manufacturing electric pile thereof - Google Patents
Single cell of proton exchange membrane fuel cell and method for manufacturing electric pile thereof Download PDFInfo
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- CN110752387B CN110752387B CN201911044169.6A CN201911044169A CN110752387B CN 110752387 B CN110752387 B CN 110752387B CN 201911044169 A CN201911044169 A CN 201911044169A CN 110752387 B CN110752387 B CN 110752387B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2404—Processes or apparatus for grouping fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0286—Processes for forming seals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention belongs to the technical field of fuel cells, and particularly relates to a single cell of a proton exchange membrane fuel cell and a manufacturing method of a galvanic pile of the single cell. The invention comprises the following steps: preparing a flow passage isolation plate; (2) Applying liquid adhesive to the outer peripheries of the anode gas diffusion layer, the cathode gas diffusion layer and the catalyst coating film, and bonding the three together for sealing and packaging to form the MEA without the reinforced frame; (3) Attaching the packaged MEA without the reinforced frame to one side of the flow channel isolation plate, and sealing and packaging to form a single cell; (4) Attaching a sealing gasket or a sealing ring on one side of the flow channel isolation plate without the MEA; and (5) stacking a plurality of single batteries to form a stack. The membrane-electrode-gas diffusion layer assembly is fixed on the runner separator plate through the adhesive, so that the problem of dislocation of the MEA and the runner separator plate in the process of stacking the fuel cell stack can be solved, the consistency of the stack is improved, the problem of long-time working cracking of the MEA edge protector in the stack is reduced, and the stable performance of the stack is ensured.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a single cell of a proton exchange membrane fuel cell and a manufacturing method of a galvanic pile of the single cell.
Background
The proton exchange membrane fuel cell is of a multilayer structure, each layer comprises a substance conveying flow channel capable of independently performing electrochemical reaction, in order to prevent leakage of reactant hydrogen, air and cooling liquid, a corresponding sealing structure is designed between layers, and the reliability of the sealing structure directly determines the service life of the fuel cell.
The fuel cell stack is formed by stacking a plurality of cells in series. When the electrodes of the battery units are connected, strict sealing is needed, hydrogen gas leakage can be caused due to poor sealing, the utilization rate of hydrogen is reduced, the efficiency of the fuel battery is influenced, and the battery can not work and the service life of the battery is influenced when the efficiency of the fuel battery is serious. The high-pressure high-power density fuel cell has the characteristic of high gas production pressure, so the requirement on gas sealing is stricter. With the development of fuel cell technology, the power of fuel cells is getting larger and larger, the number of single cells forming a fuel cell stack is getting larger and larger, the number of single cells of the current high-power stack is more than 200, some of the single cells even reach 500, with the increasing number of single cells, the requirements on the assembly and consistency of the stack are getting higher and higher, and whether the assembly consistency of the stack is good determines the performance of the stack. The well-assembled galvanic pile can exert the performance of the parts to the maximum extent, and the galvanic pile with good consistency can work under high current density, thereby being beneficial to improving the power density of the galvanic pile.
A conventional cell unit is composed of a membrane-electrode-gas diffusion layer assembly (MEA) and a bipolar plate, and is sealed by a preformed (gasket) seal (a rubber gasket is mounted on the bipolar plate and press-sealed with the frame of the membrane electrode assembly), as shown in the enlarged portion of fig. 1: wherein the PEM would extend out and be bonded to the rim by an adhesive to form a membrane-electrode-gas diffusion layer assembly (MEA) with a reinforced rim. The sealing gasket is arranged on the flow passage isolation plate and extrudes the frame through the flow passage isolation plate to form contact sealing. Because the surfaces of the two times need to be symmetrically extruded, symmetrical loads are formed, otherwise, the frame is easy to deform, and the air tightness and the power generation efficiency are further influenced. As the number of cells in a stack increases, higher demands are placed on stack assembly difficulty and consistency.
The conventional stack assembly process is usually performed in a press, and generally a membrane-electrode-gas diffusion layer assembly (MEA) with a reinforcing frame and a flow channel separator are alternately stacked with a spacing therebetween and attached with current collecting plates and end plates according to a certain assembly sequence and positioning method, and are fixed by fastening means to form a complete stack. In the assembling process, the sealing performance of the fuel cell stack is ensured, the sealing of the fuel cell stack is realized by adding a rubber sealing strip of a flow channel isolation plate and a protective edge of an MEA (membrane electrode assembly), the sealing rings on an upper flow channel isolation plate and a lower flow channel isolation plate are required to be strictly aligned, the deviation is less than 0.01mm, the processing precision of parts of the fuel cell stack such as the flow channel isolation plates, the sealing rings and the membrane-electrode-gas diffusion layer assembly (MEA) with the reinforced frame is controlled, the assembling precision of the fuel cell stack is also strictly required, the good contact between the membrane-electrode-gas diffusion layer assembly (MEA) with the reinforced frame and a bipolar plate interface is ensured, and the phenomenon that the gas diffusion layer collapses and the performance and the service life of the fuel cell are influenced due to the overpressure between the membrane-electrode-gas diffusion layer assembly (MEA) with the reinforced frame and the bipolar plate is also prevented. Therefore, the matching of the deformation of a galvanic pile sealing element and the deformation of a membrane-electrode-gas diffusion layer assembly (MEA) with a reinforced frame is considered in the galvanic pile design stage, the embedding depth of the bipolar plate with the galvanic pile height quantification into the membrane electrode diffusion layer is controlled, the sealing element reaches the preset deformation amount, no overpressure prevention design is adopted, the overpressure phenomenon frequently occurs in the galvanic pile assembly process due to the machining error of parts of the galvanic pile, and the quality of the galvanic pile assembly is difficult to control.
Disclosure of Invention
The present invention provides a single cell of proton exchange membrane fuel cell and a method for manufacturing a stack thereof, which aims to overcome the defects of the prior art. The membrane-electrode-gas diffusion layer assembly is fixed on the runner separation plate through the adhesive, so that the problem of dislocation of the membrane-electrode-gas diffusion layer assembly (MEA) and the runner separation plate in the process of stacking the fuel cell stack can be solved, the consistency of the stack is improved, the problem of long-time working cracking of the MEA edge bead in the stack is solved, and the stable performance of the stack is ensured. The MEA is combined on the flow channel isolation plate to form a single cell, so that the problems of the assembly and consistency and the sealing of the electric pile are solved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a method for manufacturing a single proton exchange membrane fuel cell and a stack thereof is characterized in that the method for manufacturing the single proton exchange membrane fuel cell and the stack thereof has the following characteristics:
a method for manufacturing a single cell of a proton exchange membrane fuel cell and a galvanic pile thereof comprises the following steps:
(1) Taking out a flow passage isolation plate, and removing dust and grease on the flow passage isolation plate;
(2) Applying liquid adhesive to the outer peripheries of the anode gas diffusion layer, the cathode gas diffusion layer and the catalyst coating film, and bonding the three layers together and sealing and packaging to form the MEA without the reinforced frame;
(3) Bonding the packaged MEA without the reinforced frame to one side of the flow channel isolation plate, and sealing and packaging to form a single cell;
(4) Attaching a sealing gasket or a sealing ring on one side of the flow channel isolation plate without the MEA;
(5) And (4) overlapping the single batteries in the step (3) to form a galvanic pile.
The MEA without the reinforced frame is used for bonding the anode gas diffusion layer, the cathode gas diffusion layer and the catalyst coating film together in a screen printing, dispensing or template injection molding mode and sealing and packaging.
The MEA without the reinforced frame is attached, sealed and packaged in an active area on the side of a hydrogen flow field or an air flow field of the flow channel isolation plate in a screen printing, dispensing or template injection mode.
The MEA without the reinforced frame is attached and packaged in a screen printing, dispensing or template injection molding mode, and the liquid adhesive is coated on the outer periphery of the MEA or the outer periphery of the flow channel active area of the flow channel isolation plate.
The runner isolation plate is made of one of graphite, a graphite resin composite material, a graphite metal composite material, a metal material and a metal resin composite material.
The flow channel isolation plate is attached with a sealing gasket or a sealing ring for sealing reactant fluid and cooling fluid.
The flow channel active area on one side of the flow channel isolation plate adhered with the sealing gasket or the sealing ring is 0.05-0.5mm higher.
The adhesive is one or more of sulfur-free normal-temperature curing silicone rubber, sulfur-free high-temperature curing silicone rubber, fluororubber, ethylene propylene diene monomer rubber, sulfur-free UV (ultraviolet) glue or epoxy resin glue.
The flow passage isolation plate is formed by attaching one partition, two partitions or a plurality of partitions, and a groove for limiting the movement of the sealing gasket or the sealing ring is arranged on the flow passage isolation plate.
Compared with the prior art, the invention has the following advantages:
(1) The membrane-electrode-gas diffusion layer assembly (MEA) is fixed on the flow channel isolation plate through an adhesive, so that the problem of dislocation of the membrane-electrode-gas diffusion layer assembly (MEA) and the flow channel isolation plate in the process of stacking the fuel cell stack can be solved, and the consistency of the stack is improved; the problem that the protective edge of the membrane-electrode-gas diffusion layer assembly (MEA) cracks in the galvanic pile after working for a long time when the membrane-electrode-gas diffusion layer assembly (MEA) is independent can be solved, and the stable performance of the galvanic pile is ensured.
(2) The membrane-electrode-gas diffusion layer assembly (MEA) is fixed on the runner partition plates through an adhesive, the seal of each single cell is sealed between the runner partition plates and the membrane electrode membrane-electrode-gas diffusion layer assembly (MEA), 1 sealing ring is reduced for each single cell, the problem that gas is easy to leak when the independent membrane-electrode-gas diffusion layer assembly (MEA) is adopted and is stacked for the second time after being disassembled is solved, and the uniformity of the stack is ensured.
(3) The fixed membrane-electrode-gas diffusion layer assembly (MEA) can be packaged on the air side or the hydrogen side, only the active area of the flow channel isolation plate is packaged, the fluid common channel part is not packaged, and consumable materials are saved.
(4) The membrane-electrode-gas diffusion layer assembly (MEA) is packaged on the runner partition plate, and the method can be realized by screen printing, dispensing, template injection molding and other methods, is suitable for large-scale production, can be quickly stacked, and realizes large-scale production.
The technical solution of the present invention will be described in further detail by the following embodiments.
Drawings
Fig. 1 is a schematic structural diagram of a conventional pem fuel cell stack.
Fig. 2 is a schematic view of the packaging process of the membrane-electrode-gas diffusion layer assembly.
Fig. 3 is a schematic structural diagram of a hermetically sealed flow path separator assembly.
Fig. 4 is a schematic view of a packaging process of the unit cell.
FIG. 5 is a schematic diagram of a novel PEM fuel cell stack.
FIG. 6 is a schematic diagram of a catalyst-membrane-catalyst sandwich around the proton exchange membrane.
FIG. 7 is a schematic view of a catalyst-membrane-catalyst sandwich structure without the periphery of the PEM.
In the figure, GDL-gas diffusion layer; CCM-catalyst/proton exchange membrane module; 1-a proton exchange membrane; 2-catalyst layer.
Detailed Description
The manufacturing method of the single battery of the proton exchange membrane fuel battery and the electric pile thereof comprises the following steps of preparing an MEA (membrane electrode assembly) and a flow passage isolation plate, attaching the MEA, the flow passage isolation plate and an attaching sealing gasket or a sealing ring, attaching the MEA on the flow passage isolation plate to form the single battery, and overlapping a plurality of single batteries to form the electric pile, wherein the structure of the single battery inside the electric pile is shown in figure 5.
Example 1
A method for manufacturing a single cell of a proton exchange membrane fuel cell and a galvanic pile thereof comprises the following steps:
(1) Preparing a membrane-electrode-gas diffusion layer assembly (MEA) comprising:
a. a proton exchange membrane; forming an anode catalyst layer on one surface of the proton exchange membrane to expose a peripheral area of the surface of the proton exchange membrane; forming a cathode catalyst layer on the other surface of the proton exchange membrane and exposing the peripheral area of the surface of the proton exchange membrane; the anode catalytic layer and the cathode catalytic layer have the same area size, as shown in fig. 6.
b. An anode gas diffusion layer; the anode gas diffusion layer is combined with the anode catalyst layer and covers the peripheral area, and the area size of the anode gas diffusion layer is completely consistent with that of the proton exchange membrane;
c. a cathode gas diffusion layer; the cathode gas diffusion layer is combined with the cathode catalyst layer and covers the peripheral area, and the area size of the cathode gas diffusion layer is completely consistent with that of the proton exchange membrane;
the diffusion layer and the proton exchange membrane are sealed and packaged by an adhesive as shown in fig. 2, and the sulfur-free normal-temperature cured silicone rubber is tightly combined with the catalyst layer through a frame member made of the proton exchange membrane, an anode gas diffusion layer and a cathode gas diffusion layer; dispensing sulfur-free normal-temperature curing silicone rubber on the periphery of a gas diffusion layer through a dispenser, then adhering an anode gas diffusion layer with a catalyst layer-membrane-catalyst layer (CCM) on the periphery of a proton exchange membrane, and curing the silicone rubber at normal temperature for 24 hours to form a membrane electrode-gas diffusion layer assembly (MEA).
(2) And sealing and packaging the runner partition plate assembly, namely sealing and packaging the anode partition plate and the cooling liquid-cathode partition plate by using an adhesive, coating epoxy resin glue on the periphery of the partition plate by screen printing, fitting, sealing and heating for curing.
(3) Sticking a sealing gasket or a sealing ring on one surface of the hermetically packaged flow channel isolating plate component; the sealing ring is formed on the isolation plate in a dispensing mode, and the sealed flow channel isolation plate assembly is sealed and packaged as shown in figure 3;
(4) And (2) attaching the MEA prepared in the step (1) to the flow channel separation plate assembly to form a single battery, as shown in FIG. 4.
(5) And (5) overlapping the single batteries in the step (4) to form a galvanic pile.
In the above embodiments, the material of the flow channel isolation plate is graphite.
The flow channel isolation plate in the above embodiments is attached with a gasket or a sealing ring for sealing the reactant fluid and the cooling fluid.
In the above embodiment, the flow channel active area on one side of the flow channel isolation plate attached with the sealing ring is higher than 0.05mm.
The adhesive in the embodiment is sulfur-free normal-temperature cured silicone rubber and epoxy resin adhesive, and the sulfur-free normal-temperature cured silicone rubber can be attached to an MEA (membrane electrode assembly) and a runner isolation plate; the epoxy resin adhesive can be attached to the MEA and also can be attached to the flow passage isolation plate.
In the above embodiments, the flow passage isolation plate is formed by attaching a partition, and a groove for limiting the movement of the sealing ring is formed on the flow passage isolation plate.
Example 2
A method for manufacturing a single cell of a proton exchange membrane fuel cell and a galvanic pile thereof comprises the following steps:
(1) Preparing a membrane-electrode-gas diffusion layer assembly (MEA) comprising:
a. a proton exchange membrane; forming an anode catalyst layer on one surface of the proton exchange membrane, wherein the area of the anode catalyst layer is consistent with that of the proton exchange membrane; and forming a cathode catalyst layer on the other surface of the proton exchange membrane, wherein the cathode catalyst layer is consistent with the proton exchange membrane in area size, as shown in fig. 7.
b. The anode gas diffusion layer is combined with the anode catalyst layer, and the area size of the anode gas diffusion layer is completely consistent with that of the proton exchange membrane;
c. the cathode gas diffusion layer is combined with the cathode catalyst layer, and the area size of the cathode gas diffusion layer is completely consistent with that of the proton exchange membrane;
the diffusion layer and the proton exchange membrane are sealed and packaged by an adhesive, as shown in fig. 2, the fluorine rubber is tightly combined with the catalyst layer by a frame component made of the fluorine rubber, the catalyst layer, the anode gas diffusion layer and the cathode gas diffusion layer; dispensing the fluororubber on the periphery of the gas diffusion layer by a dispenser, then attaching the anode gas diffusion layer, the catalyst layer-membrane-catalyst layer (CCM) without the periphery of the proton exchange membrane and the cathode gas diffusion layer, and heating and curing for 3 hours to form a membrane electrode-gas diffusion layer assembly (MEA).
(2) A sealed package flow channel isolation plate assembly is formed by hermetically packaging an anode isolation plate, a cathode isolation plate, the anode isolation plate and the cathode isolation plate through adhesives, coating sulfur-free high-temperature curing silicone rubber on the periphery of the isolation plate through screen printing, fitting, sealing and heating for curing for 1 hour.
(3) Attaching a sealing gasket or a sealing ring on one surface of the sealed and packaged flow channel isolation plate component; the sealing ring can form a sealing ring on the isolation plate in a dispensing manner, and the sealed flow channel isolation plate assembly is sealed and packaged as shown in fig. 3;
(4) And (3) attaching the MEA prepared in the step (1) to the flow channel separation plate assembly to form a single battery, as shown in FIG. 4.
(5) And (4) overlapping the plurality of single batteries in the step (4) to form a galvanic pile.
The runner isolation plate is made of a graphite resin composite material.
The flow channel isolation plate is pasted with a sealing ring for sealing reactant fluid and cooling fluid.
And the flow channel active area at one side of the flow channel isolation plate adhered with the sealing gasket or the sealing ring is higher than 0.1mm.
The adhesive is sulfur-free high-temperature cured silicone rubber and fluororubber, and the sulfur-free normal-temperature cured silicone rubber can be attached to a runner isolation plate and an MEA (membrane electrode assembly); the fluororubber can be attached to the MEA or the flow channel isolation plate.
The flow passage isolation plate is formed by laminating a partition, and a groove for limiting the movement of the sealing ring is arranged on the flow passage isolation plate.
Example 3
A manufacturing method of single battery and its electric pile of proton exchange film fuel battery includes the following steps:
(1) Preparing a membrane-electrode-gas diffusion layer assembly (MEA) comprising:
a. a proton exchange membrane; forming an anode catalyst layer on one surface of the proton exchange membrane, wherein the area of the anode catalyst layer is consistent with that of the proton exchange membrane; and forming a cathode catalyst layer on the other surface of the proton exchange membrane, wherein the cathode catalyst layer is consistent with the proton exchange membrane in area size, as shown in fig. 7.
b. The anode gas diffusion layer is combined with the anode catalyst layer, and the area size of the anode gas diffusion layer is completely consistent with that of the proton exchange membrane;
c. the cathode gas diffusion layer is combined with the cathode catalyst layer, and the area size of the cathode gas diffusion layer is completely consistent with that of the proton exchange membrane;
the diffusion layer and the proton exchange membrane are sealed and packaged by an adhesive as shown in fig. 2, and the two-component normal-temperature cured silica gel is tightly combined with the catalyst layer through a frame member made of the two-component normal-temperature cured silica gel, the catalyst layer, the anode gas diffusion layer and the cathode gas diffusion layer; and gluing the sulfur-free UV glue on the periphery of the gas diffusion layer by a screen printer, then attaching the anode gas diffusion layer, the catalyst layer-membrane-catalyst layer (CCM) without the periphery of the proton exchange membrane and the cathode gas diffusion layer, and finally carrying out UV curing at normal temperature to form a membrane electrode-gas diffusion layer assembly (MEA).
2) The runner isolating plate assembly is sealed and packaged by an anode isolating plate, a cathode isolating plate, an anode isolating plate and a cathode isolating plate through adhesives, and ethylene propylene diene monomer is coated on the periphery of the isolating plate through screen printing, is attached, sealed and is heated and cured.
(3) Attaching a sealing ring on one surface of the sealed and packaged flow channel isolation plate component; the sealing ring can form a sealing ring on the isolation plate in a dispensing manner, and the sealed flow channel isolation plate assembly is sealed and packaged as shown in fig. 3;
(4) And (3) attaching the MEA prepared in the step (1) to the flow channel separation plate assembly to form a single battery, as shown in FIG. 4.
(5) And (4) overlapping the plurality of single batteries in the step (4) to form a galvanic pile.
The runner isolation plate is made of a graphite metal composite material.
The flow channel isolation plate is attached with a sealing ring for sealing reactant fluid and cooling fluid.
And the flow channel active area at one side of the flow channel isolation plate pasted with the sealing ring is higher than 0.5mm.
The adhesive is sulfur-free UV adhesive and ethylene propylene diene monomer, and the sulfur-free UV adhesive can be attached to an MEA (membrane electrode assembly) or a runner isolation plate; the ethylene propylene diene monomer rubber can be attached to an MEA (membrane electrode assembly) or a flow channel isolation plate.
The flow passage isolation plate is formed by attaching a plurality of separators, and a groove for limiting the movement of the sealing ring is arranged on the flow passage isolation plate.
Example 4
A method for manufacturing a single cell of a proton exchange membrane fuel cell and a galvanic pile thereof comprises the following steps:
(1) Preparing a membrane-electrode-gas diffusion layer assembly (MEA) comprising:
a. a proton exchange membrane; forming an anode catalyst layer on one surface of the proton exchange membrane to expose a peripheral region of the surface of the proton exchange membrane; forming a cathode catalyst layer on the other surface of the proton exchange membrane and exposing a peripheral region of the surface of the proton exchange membrane; the anode catalytic layer and the cathode catalytic layer have the same area size, as shown in fig. 6.
b. The anode gas diffusion layer is combined with the anode catalyst layer, covers the peripheral area and has the area size completely consistent with that of the proton exchange membrane;
c. the cathode gas diffusion layer is combined with the cathode catalyst layer, covers the peripheral area and has the area size completely consistent with that of the proton exchange membrane;
the diffusion layer and the proton exchange membrane are sealed and packaged by an adhesive as shown in fig. 2, and the sulfur-free normal-temperature curing silicone rubber is tightly combined with the catalyst layer through a frame member made of the proton exchange membrane, an anode gas diffusion layer and a cathode gas diffusion layer; the sulfur-free normal-temperature curing silicone rubber is dispensed at the periphery of a catalyst layer-membrane-catalyst layer (CCM) at the periphery of a proton exchange membrane through a dispenser, then an anode gas diffusion layer, the catalyst layer-membrane-catalyst layer (CCM) at the periphery of the proton exchange membrane and a cathode gas diffusion layer are attached, and the silicone rubber is cured for 24 hours to form a membrane electrode-gas diffusion layer assembly (MEA).
(2) A sealed packaging flow channel isolation plate assembly is formed by hermetically packaging an anode isolation plate and a cooling liquid-cathode isolation plate through adhesives, coating fluororubber on the periphery of the isolation plate through screen printing, fitting, sealing and heating for curing.
(3) Attaching a sealing gasket or a sealing ring on one surface of the sealed and packaged flow channel isolation plate component; the sealing ring is formed on the isolation plate in a dispensing mode, and the sealed flow channel isolation plate assembly is sealed and packaged as shown in figure 3;
(4) Attaching the MEA prepared in the step (1) to the flow channel separation plate assembly to form a single battery, as shown in FIG. 4;
(5) And (4) overlapping the plurality of single batteries in the step (4) to form a galvanic pile.
The flow channel isolation plate is made of a metal material.
The flow channel isolation plate is attached with a sealing ring for sealing reactant fluid and cooling fluid.
And the flow channel active area at one side of the flow channel isolation plate pasted with the sealing ring is higher than 0.3mm.
The adhesive is sulfur-free normal-temperature cured silicone rubber and fluororubber, and the sulfur-free normal-temperature cured silicone rubber can be attached to an MEA (membrane electrode assembly) or a runner partition plate; the fluororubber may be bonded to both the MEA and the flow path separator.
The flow passage isolation plate is formed by laminating two separators, and a groove for limiting the movement of the sealing ring is arranged on the flow passage isolation plate.
Example 5
A manufacturing method of single battery and its electric pile of proton exchange film fuel battery includes the following steps:
(1) Preparing a membrane-electrode-gas diffusion layer assembly (MEA) comprising:
a. a proton exchange membrane; forming an anode catalyst layer on one surface of the proton exchange membrane to expose a peripheral area of the surface of the proton exchange membrane; forming a cathode catalyst layer on the other surface of the proton exchange membrane and exposing the peripheral area of the surface of the proton exchange membrane; the anode catalytic layer and the cathode catalytic layer have the same area size, as shown in fig. 6.
b. The anode gas diffusion layer is combined with the anode catalyst layer, covers the peripheral area and has the area size completely consistent with that of the proton exchange membrane;
c. the cathode gas diffusion layer is combined with the cathode catalyst layer, covers the peripheral area and has the area size completely consistent with that of the proton exchange membrane;
the diffusion layer and the proton exchange membrane are sealed and packaged by an adhesive as shown in fig. 2, and the sulfur-free normal-temperature curing silicone rubber is tightly combined with the catalyst layer through a frame member made of the proton exchange membrane, an anode gas diffusion layer and a cathode gas diffusion layer; the sulfur-free normal-temperature curing silicone rubber is applied with glue at the periphery of a catalyst layer-membrane-catalyst layer (CCM) at the periphery of a proton-free exchange membrane by a screen printer, then an anode gas diffusion layer, a catalyst layer-membrane-catalyst layer (CCM) at the periphery of the proton-free exchange membrane and a cathode gas diffusion layer are attached, and finally the silicone rubber is cured for 24 hours at normal temperature to form a membrane electrode-gas diffusion layer assembly (MEA).
(2) A sealed and packaged runner partition plate assembly is formed by hermetically packaging an anode partition plate, a cooling liquid-cathode partition plate, the anode partition plate and the cooling liquid-cathode partition plate through adhesives, coating sulfur-free normal-temperature curing silicone rubber around the partition plate through screen printing, fitting, sealing and heating for curing.
(3) Attaching a sealing gasket on one surface of the hermetically packaged runner isolating plate component; the sealing gasket forms a sealing ring on the isolation plate in a dispensing mode, and the flow channel isolation plate assembly is sealed and packaged as shown in figure 3;
(4) Bonding the MEA prepared in the step (1) to the runner partition plate assembly to form a single battery, as shown in FIG. 4;
(5) And (4) overlapping the plurality of single batteries in the step (4) to form a galvanic pile.
The runner isolation plate is made of a metal resin composite material.
The flow channel isolation plate is attached with a sealing gasket for sealing reactant fluid and cooling fluid.
And the flow channel active area at one side of the flow channel isolation plate stuck with the sealing gasket is higher than 0.2mm.
The adhesive is sulfur-free normal-temperature curing silicone rubber, and can be attached to an MEA (membrane electrode assembly) or a runner isolation plate.
The flow passage isolation plate is formed by laminating a partition, and a groove for limiting the movement of the sealing gasket is arranged on the flow passage isolation plate.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modifications, alterations and equivalent changes of the above embodiments according to the principles of the present invention are within the protection scope of the technical solution of the present invention.
Claims (6)
1. A method for manufacturing a single cell of a proton exchange membrane fuel cell and a galvanic pile thereof is characterized by comprising the following steps:
(1) Taking out a flow passage isolation plate, and removing dust and grease on the flow passage isolation plate;
(2) Applying liquid adhesive on the peripheries of the anode gas diffusion layer, the cathode gas diffusion layer and the catalyst coating film, and bonding the anode gas diffusion layer, the cathode gas diffusion layer and the catalyst coating film together and sealing and packaging the three to form the MEA without the reinforced frame;
(3) Attaching the packaged MEA without the reinforced frame to one side of the flow channel isolation plate, and sealing and packaging to form a single cell;
(4) Attaching a sealing gasket or a sealing ring on one side of the flow channel isolation plate without the MEA;
(5) Superposing the plurality of single batteries in the step (3) to form a galvanic pile;
the MEA without the reinforced frame is attached, sealed and packaged in an active area on the side of a hydrogen flow field or an air flow field of the flow channel isolation plate in a screen printing, dispensing or template injection mode;
the flow channel isolation plate is adhered with a sealing gasket or a sealing ring for sealing reactant fluid and cooling fluid;
the flow passage isolation plate is formed by attaching one partition, two partitions or a plurality of partitions, and a groove for limiting the movement of the sealing gasket or the sealing ring is arranged on the flow passage isolation plate.
2. The PEM fuel cell single cell and the manufacturing method of the cell stack according to claim 1, wherein the MEA without the reinforced frame is used for bonding the anode gas diffusion layer, the cathode gas diffusion layer and the catalyst coating film together by means of screen printing, dispensing or template injection molding and sealing and packaging.
3. The pem fuel cell unit cell and the manufacturing method of the electric pile thereof as claimed in claim 1, wherein the MEA without the reinforced frame is attached and packaged by screen printing, dispensing or template injection, and the liquid adhesive is coated on the outer periphery of the MEA or the outer periphery of the active area of the flow channel separator.
4. The pem fuel cell of claim 1 and the manufacturing method of the stack thereof, wherein the material of the flow channel isolation plate is one of graphite, graphite resin composite material, graphite metal composite material, metal material and metal resin composite material.
5. The pem fuel cell unit cell and stack manufacturing method of claim 1 wherein the active area of the flow channel on one side of the flow channel isolation plate attached with the sealing gasket or ring is 0.05-0.5mm higher.
6. The PEM fuel cell unit cell and the method for manufacturing the stack thereof according to claim 1, wherein the adhesive is one or more of sulfur-free normal-temperature-curing silicone rubber, sulfur-free high-temperature-curing silicone rubber, fluororubber, ethylene propylene diene monomer rubber, sulfur-free UV (ultraviolet) glue or epoxy resin glue.
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| CN111276714A (en) * | 2020-02-12 | 2020-06-12 | 浙江锋源氢能科技有限公司 | Fuel cell assembly and method of assembling the same |
| CN112803054B (en) * | 2021-01-05 | 2021-12-14 | 广东省科学院新材料研究所 | Electrochemical reaction device and manufacturing method thereof |
| CN114188580B (en) * | 2021-10-20 | 2023-07-14 | 海卓动力(上海)能源科技有限公司 | Preparation method of fuel cell membrane electrode |
| CN114050287B (en) * | 2021-11-02 | 2023-04-07 | 浙江高成绿能科技有限公司 | Single-side sealed fuel cell stack |
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| CN106159304A (en) * | 2015-03-30 | 2016-11-23 | 宜兴市四通家电配件有限公司 | A kind of proton exchange film fuel cell electric piling and preparation method thereof |
| CN106711475A (en) * | 2016-11-17 | 2017-05-24 | 上海攀业氢能源科技有限公司 | Single cell of metal plate fuel cell and preparation method of single cell |
| CN207233866U (en) * | 2017-09-28 | 2018-04-13 | 陈莉 | A kind of dual polar plates of proton exchange membrane fuel cell structure and fuel cell pile |
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