CN112886041B - Membrane electrode preparation system of fuel cell - Google Patents
Membrane electrode preparation system of fuel cell Download PDFInfo
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- CN112886041B CN112886041B CN202110057565.3A CN202110057565A CN112886041B CN 112886041 B CN112886041 B CN 112886041B CN 202110057565 A CN202110057565 A CN 202110057565A CN 112886041 B CN112886041 B CN 112886041B
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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]
- H01M8/1006—Corrugated, curved or wave-shaped MEA
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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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- 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
Abstract
The invention relates to a membrane electrode preparation system of a fuel cell, comprising: a proton membrane unit for supplying and transporting a proton membrane to the binding unit; the double-sided adhesive layer unit is used for providing and transporting a double-sided adhesive layer with a central hollow part to the bonding unit and comprises a first double-sided adhesive layer bonded with the upper surface of the proton membrane and a second double-sided adhesive layer bonded with the lower surface of the proton membrane; the double-sided adhesive layer is provided with an inner adhesive layer and an outer adhesive layer; the bonding unit is used for respectively bonding the inner glue layers of the first double-sided glue layer and the second double-sided glue layer to the upper surface and the lower surface of the proton membrane so as to enable the proton membrane to be provided with a glue layer protection frame, and the outer glue layers of the double-sided glue layers are far away from the proton membrane and used for bonding the sealing frame layer of the membrane electrode; the central hollow part is used for accommodating the catalyst layer; and the catalytic diffusion sealing unit is used for bonding the catalyst layer, the gas diffusion layer and the sealing frame layer to the upper surface and the lower surface of the proton membrane to obtain the membrane electrode, so that the proton membrane is continuously produced and saved.
Description
Technical Field
The invention relates to the field of membrane electrode preparation of fuel cells, in particular to a membrane electrode preparation system of a fuel cell.
Background
A Proton Exchange Membrane Fuel Cell (PEMFC) is a chemical device that directly converts chemical energy of fuel into electric energy, uses fuel and oxygen as raw materials, has high energy conversion efficiency, no noise and no pollution, and can be used as a power source of an electric vehicle; typically the fuel is hydrogen. The membrane electrode is the core component of the fuel cell, and is the fundamental source of fuel cell power, the cost of the membrane electrode accounts for 70% of the fuel cell stack, and accounts for 35% of the fuel cell power system, and the performance and durability of the membrane electrode directly determine the performance and durability of the fuel cell stack and the system. In the prior art, for the preparation of a membrane electrode, especially for the preparation of a 7-layer MEA, a catalyst is generally directly sprayed on a proton membrane, a gas diffusion layer is attached, and finally an adhesive is applied, and the peripheral sealing frame of the membrane electrode is attached in a dispensing manner to achieve sealing, so as to obtain the membrane electrode; on one hand, the equipment system is discontinuous, the intermediate product is required to be transferred frequently, especially, the time waste is often caused by an adhesive or a dispensing mode, the equipment system is complex and the sealing effect is poor, and on the other hand, the equipment is often damaged and wasted during the transfer of the proton membrane; there is an urgent need for an integrated continuous preparation system capable of rapidly producing a membrane electrode from a proton membrane, and the integrated continuous preparation system has good sealing effect and saves the proton membrane.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a membrane electrode preparation system of a fuel cell.
The technical scheme of the invention is summarized as follows:
the invention provides a membrane electrode preparation system of a fuel cell, comprising:
a proton membrane unit for supplying and transporting a proton membrane to the binding unit;
the double-sided adhesive layer unit is used for providing and transporting a double-sided adhesive layer with a central hollow part to the bonding unit and comprises a first double-sided adhesive layer bonded with the upper surface of the proton membrane and a second double-sided adhesive layer bonded with the lower surface of the proton membrane; the double-sided adhesive layer is provided with an inner adhesive layer and an outer adhesive layer;
the bonding unit is used for respectively bonding the inner glue layers of the first double-sided glue layer and the second double-sided glue layer to the upper surface and the lower surface of the proton membrane so as to enable the proton membrane to be provided with a glue layer protection frame, and the outer glue layers of the double-sided glue layers are far away from the proton membrane and used for bonding the sealing frame layer of the membrane electrode; the central hollow part is used for accommodating a catalyst layer;
and the catalytic diffusion sealing unit is used for bonding the catalyst layer, the gas diffusion layer and the sealing frame layer to the upper surface and the lower surface of the proton membrane to obtain the membrane electrode.
Preferably, the outer adhesive layer side of the double-sided adhesive layer is provided with an outer release film to protect the outer adhesive layer after the proton membrane is bonded by the bonding unit, and the catalytic diffusion sealing unit comprises an outer release film rewinding machine to peel off the outer release film, so that the outer adhesive layer is used for bonding the sealing frame layer.
Preferably, the catalytic diffusion sealing unit comprises a sealing frame layer laminating device arranged at the downstream of the external release film rewinding machine, and the proton film after the external release film is peeled off is transported to the sealing frame layer laminating device so as to adhere the sealing frame layer on the adhered proton film, thereby obtaining the membrane electrode.
Preferably, the catalytic diffusion sealing unit includes a gas diffusion layer attaching means to attach the gas diffusion layer on the proton membrane.
Preferably, the gas diffusion layer comprises a catalyst layer, the catalyst layer is close to one side of the proton membrane, the gas diffusion layer is far away from the proton membrane, and the catalyst layer and the gas diffusion layer are attached through a gas diffusion layer attaching device so as to attach the catalyst layer and the gas diffusion layer on the proton membrane; the catalyst layer is positioned in the central hollow area on the proton membrane.
Preferably, the catalytic diffusion sealing unit further comprises a catalyst coating means such that the proton membrane is coated with a catalyst layer at the central hollowed-out region; and then the gas diffusion layer is bonded to the catalyst layer by the gas diffusion layer bonding device.
Preferably, the double-sided adhesive layer unit comprises a die cutting machine and an inner release film rewinding machine; the inner adhesive layer side of the double-sided adhesive layer is provided with an inner release film; the double-sided adhesive layer passes through a die cutting machine to form a central hollow part of the double-sided adhesive, then passes through an internal release film rewinding machine to peel off an internal release film, and is transported to an adhesion unit for lamination.
Preferably, the double-sided adhesive layer unit further includes a position sensor for acquiring position information of the double-sided adhesive layer, and the position sensor includes a first adhesive layer position sensor for acquiring position information of the first double-sided adhesive layer and a second adhesive layer position sensor for acquiring position information of the second double-sided adhesive layer, so as to control a transmission speed of the double-sided adhesive layer according to the acquired position information, and make the central hollow-out portions of the first double-sided adhesive layer and the second double-sided adhesive layer, which are bonded to the proton membrane, correspond to each other.
Preferably, the length of the double-sided adhesive layer in the transverse direction is greater than that of the proton membrane, so that after bonding, the double-sided adhesive layer can seal the transverse edge of the proton membrane in the transverse direction, and the inner adhesive layers of the first double-sided adhesive layer and the second double-sided adhesive layer can be attached to the outer side of the transverse edge of the proton membrane in the transverse direction to form a transverse adhesive layer bonding part.
Preferably, the proton membrane unit has a cutter to cut the proton membrane in the longitudinal direction to form a proton membrane sheet, and the proton membrane sheet is transported to the bonding unit to be bonded with the first and second double-sided adhesive layers; after bonding, the double-sided adhesive layer can seal the longitudinal edge of the proton membrane in the longitudinal direction, and the inner adhesive layers of the first double-sided adhesive layer and the second double-sided adhesive layer can be attached to the outer sides of the longitudinal edge of the proton membrane in the longitudinal direction to form a longitudinal bonding part of the adhesive layers.
Compared with the prior art, the invention has the beneficial effects that: according to the membrane electrode preparation system of the fuel cell, provided by the invention, the proton membrane can be directly coated with the catalyst, the gas diffusion layer and the sealing frame layer in the preparation system in a sealing manner, and the 7-layer membrane electrode with the MEA structure and the sealing protection of the proton membrane glue layer is finally obtained; the pressure-sensitive double-sided adhesive tape is used for preparing the sealing structure, so that the work of additionally adding bonding adhesive tape such as dispensing is not needed, the work of simply unreeling the coiled material, rolling and the like is not needed, the extra work is not needed in the process of adding the sealing frame layer, the sealing frame layer is directly bonded to the other side of the double-sided adhesive tape, and the process of quickly sealing the finished membrane electrode is achieved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a membrane electrode preparation system according to the present invention;
FIG. 2 is an exploded view of a membrane electrode assembly according to the present invention;
FIG. 3 is a schematic structural view of a first double-sided adhesive layer of a membrane electrode according to the present invention before use;
FIGS. 4a-4e are schematic cross-sectional structural diagrams of a membrane electrode manufacturing process according to an embodiment of the present invention;
FIGS. 5a-5d are schematic cross-sectional structural diagrams of membrane electrode manufacturing processes according to another embodiment of the present invention;
FIG. 6 is a schematic view of the membrane electrode manufacturing system according to the present invention.
Description of reference numerals:
1-a first glue layer unit; 11-first glue layer unwinder; 12-a first die cutter; 13-first glue line position sensor; 14-a first inner release film rewinder; 15-a first external release film rewinder;
2-a second glue layer unit; 21-a second glue layer unwinder; 22-a second die cutter; 23-a second glue layer position sensor; 24-a second inner release film rewinder; 25-a second external release film rewinder;
3-a proton membrane unit; 31-proton membrane unwinder; 32-protective film rewinder; 33-proton membrane position sensor; 34-a cutter;
4-a bonding unit; 41-a first bonding roll; 42-a second bonding roll; 43-adhesion test sensor;
5-a catalyst coating device;
6-gas diffusion layer attaching device; 61-first diffusion layer unwinder; 62-a second diffusion layer unwinder; 63-a first diffusion layer bonding roll; 64-a second diffusion layer bonding roll;
7-sealing the frame layer laminating device; 71-a first sealing frame layer unwinder; 72-a second sealing frame layer unwinder; 73-first seal frame layer bonding roller; 74-second seal frame layer bonding roller;
8-slicing machine;
90-proton membrane; 901-upper surface; 902-lower surface;
91-a first two-sided adhesive layer; 910-a first double-sided adhesive layer main body; 911-first inner glue layer; 912-a first outer glue layer; 913 — a first central hollowed-out portion; 9110-a first inner release film; 9120-a first outer release film;
92-a second double-sided adhesive layer; 920-a second double-sided adhesive layer main body; 921-second inner glue layer; 922-a second outer glue layer; 923 — a second central hollowed-out portion;
93-a first catalyst layer; 94-a second catalyst layer; 95-a first gas diffusion layer; 96-a second gas diffusion layer; 97-a first sealing frame layer; 98-second sealing frame layer.
Detailed Description
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, which will enable those skilled in the art to practice the present invention with reference to the accompanying specification. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict. It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The present invention provides a membrane electrode preparation system of a fuel cell, as shown in fig. 1 and 6, comprising: a proton membrane unit 3 for supplying and transporting a proton membrane to the binding unit 4; a double-sided adhesive layer unit for supplying and transporting a double-sided adhesive layer having a central hollow portion to the bonding unit 4, including a first double-sided adhesive layer bonded to an upper surface of the proton membrane and a second double-sided adhesive layer bonded to a lower surface of the proton membrane; the double-sided adhesive layer is provided with an inner adhesive layer and an outer adhesive layer; the bonding unit 4 is used for bonding the inner glue layers of the first double-sided glue layer and the second double-sided glue layer to the upper surface and the lower surface of the proton membrane respectively so as to enable the proton membrane to be provided with a glue layer protection frame, and the outer glue layers of the double-sided glue layers are far away from the proton membrane and used for bonding the sealing frame layer of the membrane electrode; the central hollow part is used for accommodating the catalyst layer; the catalytic diffusion sealing unit is used for bonding the catalyst layer, the gas diffusion layer and the sealing frame layer to the upper surface and the lower surface of the proton membrane to obtain a membrane electrode; the proton membrane unit 3 and the double-sided adhesive layer unit provide double-sided adhesive layers for transporting the proton membrane and having a central hollow part, the inner adhesive layers of the double-sided adhesive layers are simply and quickly used for completing peripheral sealing and protection of the proton membrane, the lamination is continuously carried out, then the catalytic diffusion sealing unit on the production line is used for laminating the catalyst layer and the gas diffusion layer, the outer adhesive layers of the double-sided adhesive layers are used for bonding the sealing frame layer, the continuous production is realized, the efficiency is improved, and the preparation system is simple; in addition, the equipment can be used for directly spraying a catalyst to form 3 layers of MEA and then rolling, or laminating a gas diffusion layer to form 5 layers of MEA and then rolling, or bonding 7 layers of MEA of a sealing frame layer and then rolling, and can be conveniently realized; and the double-sided glue layer is bonded on the periphery of the proton membrane in advance to protect the proton membrane before the sealing frame layer is bonded, so that the proton membrane is not damaged when the proton membrane is used, such as moving and clamping edges, and the sealing property of the proton membrane is ensured, thereby providing guarantee for improving the safety of subsequent membrane electrode production and improving the sealing property and achieving the purpose of improving the efficiency of the fuel cell.
Specifically, as shown in fig. 1, 2, and 6, the proton membrane unit 3 has a proton membrane unwinder 31, and the proton membrane 90 is unwound and then transported to the binding unit 4; the double-sided adhesive layer unit comprises a first adhesive layer unit 1 and a second adhesive layer unit 2, the first adhesive layer unit 1 is provided with a first adhesive layer unwinder 11, the first double-sided adhesive layer is unwound, and then the first double-sided adhesive layer is conveyed to the bonding unit 4; the second glue layer unit 2 is provided with a second glue layer unwinder 21 which unwinds the second double-sided glue layer and then transports the second double-sided glue layer to the bonding unit 4; the first glue layer unit 1 is provided with a first die cutting machine 12, a first central hollow part 913 of a first double-sided glue layer is formed by die cutting, the second glue layer unit 2 is provided with a second die cutting machine 22, a second central hollow part 923 of a second double-sided glue layer is formed by die cutting, and then, as shown in the figure, the first double-sided glue layer is located on the upper surface of the proton membrane, the second double-sided glue layer is located on the lower surface of the proton membrane, the bonding unit 4 is provided with a first bonding roller 41 and a second bonding roller 42, and the compression rollers are matched to form the seal of the proton membrane, wherein the first inner glue layer 911 of the first double-sided glue layer faces the upper surface 901 of the proton membrane 90, and the second inner glue layer 921 of the second double-sided glue layer faces the lower surface 902 of the proton membrane 90, so that the lamination is completed.
Then, as shown in fig. 1, 2 and 6, the assembly of the subsequent catalyst layer, gas diffusion layer and sealing frame layer is performed by the first method: in the conventional sense, the catalyst layer can be coated by the catalyst coating device 5, specifically, the coating can be performed by brushing, printing, coating, knife coating, spraying or medium transfer printing, and the coating can be performed by one-time coating or multiple times of coating; then, the gas diffusion layer is pressed to the surface of the catalyst layer through a gas diffusion layer laminating device 6, wherein the gas diffusion layer is generally carbon paper, carbon fiber woven fabric, carbon cloth and the like; and then the sealing frame layer is pressed by the sealing frame layer laminating device 7, and the outer adhesive layer of the double-sided adhesive layer is used for bonding with the sealing frame layer.
In the second mode, since the catalyst layer is integrated on the gas diffusion layer already on the market in the prior art, the gas diffusion layer can be used for bonding the gas diffusion layer and the catalyst layer after the bonding unit 4 of the preparation system, and the catalyst coating device 5 and the gas diffusion layer bonding device 6 are integrated into a bonding device; then, the sealing frame layer is bonded by the sealing frame layer bonding device 7.
Of course, in the subsequent development, in the third mode, the sealing frame layer may be bonded outside the gas diffusion layer in advance, and then the gas diffusion layer bonding device 6 and the sealing frame layer bonding device 7 may only need one bonding device, and the previous catalyst coating device 5 may be performed according to the first mode.
In addition, by adopting the fourth mode, the catalyst layer, the gas diffusion layer and the sealing frame layer may be integrated, and then the bonding of the catalyst layer, the gas diffusion layer and the sealing frame layer can be completed only by one bonding device.
In some embodiments, the outer adhesive layer side of the double-sided adhesive layer has an outer release film to protect the outer adhesive layer after the proton membrane is bonded by the bonding unit, and the catalytic diffusion sealing unit includes an outer release film rewinder to peel off the outer release film so that the outer adhesive layer is used for bonding the sealing frame layer; because the outer adhesive layer is mainly used for adhering the sealing frame layer, the outer release film still needs to be kept on the outer adhesive layer before the sealing frame layer is adhered, so that the outer adhesive layer is protected; then, peeling off the outer release film, and attaching the sealing frame layer, so that the attachment of the sealing frame layer can be completed quickly and conveniently without additional gluing, adhesive dispensing and process cost increase; specifically, in consideration of the above four modes, the first mode can be that the outer release film is peeled off after the gas diffusion layer is attached by the gas diffusion layer attaching device 6, and the sealing frame layer is bonded; the second mode is similar to the first mode; in the third mode, the outer release film is peeled off after the catalyst coating device 5, and the gas diffusion layer and the sealing frame layer are bonded; in the fourth embodiment, the outer release film may be peeled off after the unit 4 is bonded, and then the catalyst layer, the gas diffusion layer, and the sealing frame layer may be bonded.
In some embodiments, the catalytic diffusion sealing unit includes a sealing frame layer attaching device 7 disposed downstream of the external release film rewinder, and the proton film after peeling off the external release film is transported to the sealing frame layer attaching device 7 to attach the sealing frame layer on the attached proton film, so as to obtain a membrane electrode, in which case, the membrane electrodes are still connected together to form a strip, and can be coiled again for storage according to the thickness, flexibility, etc. of the specific membrane; or the membrane electrode slice can be obtained by slicing through a slicing machine 8 in consideration of the structural safety.
In some embodiments, the catalytic diffusion sealing unit includes a gas diffusion layer attaching means 6 to attach the gas diffusion layer on the proton membrane.
In some embodiments, the gas diffusion layer comprises a catalyst layer, the catalyst layer is close to one side of the proton membrane, the gas diffusion layer is far away from the proton membrane, and the catalyst layer and the gas diffusion layer are attached through a gas diffusion layer attaching device so as to attach the catalyst layer and the gas diffusion layer on the proton membrane; the catalyst layer is located in the central hollow area of the proton membrane, and this embodiment is the second embodiment mentioned above.
In some embodiments, the catalytic diffusion sealing unit further comprises a catalyst coating device 5, such that the proton membrane is coated with a catalyst layer in said central hollowed-out region; and then bonding the gas diffusion layer to the catalyst layer by a gas diffusion layer bonding device.
In some embodiments, the double-sided adhesive layer unit comprises a die cutter and an inner release film rewinder; the inner adhesive layer side of the double-sided adhesive layer is provided with an inner release film; the double-sided adhesive layer passes through the die cutting machine to form a central hollow-out part of the double-sided adhesive layer, then passes through the inner release film rewinding machine to peel off the inner release film, and is transported to the bonding unit for bonding.
In some embodiments, the double-sided adhesive layer unit further includes a position sensor for acquiring position information of the double-sided adhesive layer, including a first adhesive layer position sensor 13 acquiring position information of the first double-sided adhesive layer and a second adhesive layer position sensor 23 acquiring position information of the second double-sided adhesive layer, to control a transmission speed of the double-sided adhesive layer according to the acquired position information, so that the central hollowed portions of the first double-sided adhesive layer and the second double-sided adhesive layer after being bonded to the proton membrane correspond to each other.
In some embodiments, the length of the double-sided adhesive layer in the transverse direction is greater than that of the proton membrane, so that after bonding, the double-sided adhesive layer can seal the transverse edge of the proton membrane in the transverse direction, and the inner adhesive layers of the first double-sided adhesive layer and the second double-sided adhesive layer can be attached to each other outside the transverse edge of the proton membrane in the transverse direction to form an adhesive layer transverse bonding part.
In some embodiments, the proton membrane unit has a cutter 34 to cut the proton membrane in the longitudinal direction to form a proton membrane sheet, which is transported to the bonding unit to be bonded with the first and second two-sided adhesive layers; after bonding, the double-sided adhesive layer can seal the longitudinal edge of the proton membrane in the longitudinal direction, and the inner adhesive layers of the first double-sided adhesive layer and the second double-sided adhesive layer can be attached to the outer sides of the longitudinal edge of the proton membrane in the longitudinal direction to form a longitudinal bonding part of the adhesive layers.
Specifically, referring to fig. 1, 2, 3, 4, 5, and 6, as shown in fig. 3, taking the first double-sided adhesive layer 91 as an example, the first double-sided adhesive layer 91 has a first double-sided adhesive layer main body 910, a first inner adhesive layer 911, a first outer adhesive layer 912, a protective first inner release film 9110 having adhesive layers, and a first outer release film 9120; the second double-sided adhesive layer 92 attached to the lower surface of the proton membrane correspondingly has a similar structure, and the specific second double-sided adhesive layer main body 920, the second inner adhesive layer 921, the second outer adhesive layer 922 and the second central hollow portion 923 are not described in detail.
As shown in fig. 3 and 6, which are structural examples of a membrane electrode explosion diagram, the membrane electrode is composed of, in order from top to bottom, a first sealing frame layer 97, a first gas diffusion layer 95, a first catalyst layer 93, a first double-sided adhesive layer 91, a proton membrane 90, a second double-sided adhesive layer 92, a second catalyst layer 94, a second gas diffusion layer 96, and a second sealing frame layer 98; the first inner glue layer 911 of the first double-sided glue layer 91 is adhered to the upper surface 901 of the proton membrane 90, the second inner glue layer 921 of the second double-sided glue layer 92 is adhered to the lower surface 902 of the proton membrane 90, and the first central hollow part 913 of the first double-sided glue layer 91 and the second central hollow part 923 of the second double-sided glue layer 92 correspond to each other and can be used for accommodating the first catalyst layer 93 and the second catalyst layer 94; the first sealant layer 912 of the first double-sided adhesive layer 91 is adhered to the first sealing frame layer 97, and the second sealant layer 922 of the second double-sided adhesive layer 92 is adhered to the second sealing frame layer 98, which may not be strictly above and below, and are only described from top to bottom for structural description.
From the manufacturing system fig. 1 and 6, and in conjunction with the longitudinal section of the membrane electrode structure change process in one manufacturing flow of fig. 4, the manufacturing system has a proton membrane unwinder 31 on the proton membrane unit 3 to unwind the proton membrane 90, and then a protective membrane rewinder 32 peels off the protective membrane on the surface of the proton membrane 90 and transports the protective membrane to the bonding unit 4; the double-sided adhesive layer unit comprises a first adhesive layer unit 1 and a second adhesive layer unit 2, the first adhesive layer unit 1 is provided with a first adhesive layer unwinder 11 which unwinds the first double-sided adhesive layer 91, taking the first double-sided adhesive layer 91 of fig. 3 as an example, a first central hollowed-out portion 913 is die-cut by a first die cutter 12, a first inner release film 9110 of the first double-sided adhesive layer 91 is peeled by a first inner release film rewinder 14 and is transported to the bonding unit 4, wherein the first inner adhesive layer 911 of the first double-sided adhesive layer 91 is positioned on the upper surface 901 of the proton membrane 90; the second adhesive layer unit 2 is provided with a second adhesive layer unwinder 21 which unwinds the second double-sided adhesive layer 92, then a second central hollow-out portion 923 is die-cut by a second die cutter 22, and then the second inner release film of the second double-sided adhesive layer 92 is peeled by a second inner release film rewinder 24 and transported to the bonding unit 4, wherein the second inner adhesive layer 921 of the second double-sided adhesive layer 92 is located on the lower surface 902 of the proton membrane 90; the bonding unit 4 has a first bonding roller 41 and a second bonding roller 42, the rollers cooperate to form edge sealing of the proton membrane, as shown in fig. 4a, the proton membrane 90 is continuous in the longitudinal direction, only one membrane electrode is shown here, and is continuous in the roll-up roller, where the first central hollow portion 913 and the second central hollow portion 923 correspond to each other, which can be achieved by acquiring positions of the first adhesive layer position sensor 13 and the second adhesive layer position sensor 23, for example, acquiring the same edge in the transportation direction of the first central hollow portion 913 and the second central hollow portion 923, and then adjusting the transportation speed or the operation speed of the die-cutting machine according to the position condition, so that when reaching the bonding unit 4, the two central hollow portions correspond to each other; of course, the preparation system can be adjusted in time according to the corresponding condition of the central hollow part verified by the adhesion detection sensor 43; thereafter, on the catalyst coating device 5, the first central hollow portion 913 and the second central hollow portion 923 are respectively sprayed with a first catalyst layer 93 and a second catalyst layer 94, as shown in fig. 4 b; thereafter, on the gas diffusion layer attaching device 6, the first gas diffusion layer 95 is supplied from the first diffusion layer unwinder 61, the second gas diffusion layer 96 is supplied from the second diffusion layer unwinder 62, and the first gas diffusion layer 95 and the second gas diffusion layer 96 are respectively bonded at the first catalyst layer 93 and the second catalyst layer 94 by two press rolls of the first diffusion layer bonding roll 63 and the second diffusion layer bonding roll 64, as shown in fig. 4 c; then, the first outer release film 9120 of the first double-sided adhesive layer 91 and the second outer release film of the second double-sided adhesive layer 92 are respectively peeled off by the first outer release film rewinder 15 and the second outer release film rewinder 25, and the first outer adhesive layer 912 and the second outer adhesive layer 922 leak out, as shown in fig. 4 d; then, on the sealing frame layer bonding apparatus 7, the first sealing frame layer 97 is supplied by the first sealing frame layer unwinder 71, the second sealing frame layer 98 is supplied by the second sealing frame layer unwinder 72, and the first sealing frame layer 97 and the second sealing frame layer 98 are bonded to the first outer adhesive layer 912 and the second outer adhesive layer 922, respectively, by the first sealing frame layer bonding roller 73 and the second sealing frame layer bonding roller 74, as shown in fig. 4e, to finally form a 7-layer MEA membrane electrode assembly of a protection frame structure; there is described a schematic of the membrane electrode bonding step configuration of fig. 4a-4e in the longitudinal direction, while the final 7-layer MEA membrane electrode cross-section in the transverse direction can be seen with reference to the results of fig. 5d, with specific steps as in fig. 5a-5d, which is similar to the step process of fig. 4; because the length of the double-sided adhesive layer in the transverse direction is greater than that of the proton membrane, that is, the transverse width of the first double-sided adhesive layer 91 and the second double-sided adhesive layer 92 is greater than that of the proton membrane 90, after bonding, the double-sided adhesive layer can seal the transverse edge of the proton membrane in the transverse direction, and the inner adhesive layers of the first double-sided adhesive layer 91 and the second double-sided adhesive layer 92 can be mutually attached at the outer side of the transverse edge of the proton membrane in the transverse direction to form an adhesive layer transverse joint part, so that edge sealing can be provided for the proton membrane and the proton membrane can be saved; after the 7-layer MEA membrane electrode of FIG. 4e, a sheet-like membrane electrode can be made using microtome 8.
On the other hand, the cross-sectional structures shown in fig. 5a to 5d may also be applied in the longitudinal direction, and only the cutting machine 34 needs to be arranged in the proton membrane unit 3 in the above scheme, specifically, after the protective film on the surface of the proton membrane 90 is peeled by the protective film rewinding machine 32, the proton membrane is cut and formed by being transported to the cutting machine 34, and then the proton membrane is transported to the bonding unit 4, the speed is controlled, and the proton membrane position sensor 33, the first glue layer position sensor 13, and the second glue layer position sensor 23 are combined, finally, the first central hollow portion 913 and the second central hollow portion 923 can be made to correspond to each other and formed in the center of the proton membrane, so that the edge of the proton membrane can also be protected in the longitudinal direction, because at this time, although the proton membrane is cut into sheets, the upper and lower two double-sided glue layers are still continuous, the membrane electrode in the production process at this time may still be a roll material, as shown in N1 of fig. 5, and the following steps may refer to that shown in fig. 4, and will not be repeated.
In addition, according to the continuous production and the habit, the open transport direction of the coil is the longitudinal direction, and the vertical transport direction is the transverse direction, i.e. the width direction of the coil.
On the other hand, according to the embodiment shown in fig. 5, the bonding may be performed according to the third embodiment, after fig. 5a, the catalyst layer is coated as shown in fig. 5b, and then fig. 5c is a step of peeling off the outer release film, and the gas diffusion layer and the sealing frame layer are bonded at one time in fig. 5 d.
Note that, for the main body of the double-sided adhesive layer, for example, the first double-sided adhesive layer main body 910 of the first double-sided adhesive layer 91 may select a PEN (polyethylene naphthalate) film, a PET (polyethylene terephthalate) film, a PI (polyimide) film, or the like; the PEN film has good advantages in mechanical property, high temperature resistance, gas barrier, environmental protection, hydrolysis resistance, chemical stability, heat resistance, ultraviolet resistance and radiation resistance; the inner adhesive layer, such as the first inner adhesive layer 911, may be a silicone pressure sensitive adhesive without the need for heat pressing; the same silicone pressure sensitive adhesive can be used for the same first outer adhesive layer 912, which can be selected according to the material of the sealing frame layer.
In some embodiments, the silicone pressure sensitive adhesive is a solventless silicone pressure sensitive adhesive prepared by: mixing 100 parts by mass of active polydimethylsiloxane, 1-50 parts by weight of siloxane compound with one end of acryloxy group and 10-100 parts by weight of reactive diluent, and uniformly stirring to obtain base rubber; 0.01-15 parts by weight of cross-linking agent and 0.01-0.8 part by weight of at least one platinum catalyst are added into the base rubber and mixed evenly. Curing the mixed glue at 150 ℃ for 5 minutes to obtain the solvent-free silica gel pressure-sensitive adhesive; the solvent-free silica gel pressure-sensitive adhesive has better pressure sensitivity compared with other adhesives, when a double-sided adhesive layer is made of the adhesive, the double-sided adhesive layer is convenient to re-adhere after being stuck in a wrong way, and the solvent-free silica gel pressure-sensitive adhesive is particularly suitable for the laboratory environment; in the preparation of the double-sided adhesive layer, the adhesive is uniformly coated on the flatly placed sealing layer to form an adhesive layer, the adhesive layer is baked to form the double-sided adhesive layer, and then the double-sided adhesive layer can be directly used for the use, or a release film is attached to the adhesive layer, so that the subsequent processing is convenient, and the release film can be peeled off when in use; and the initial viscosity (GB/T4852-2002), the permanent viscosity (GB/T4851-2014), the peel strength (GB/T2792-2014), the high-temperature permanent viscosity, the hydrolysis resistance and the like are tested, so that the performance requirements of the proton exchange membrane composite sealing structure can be met, particularly, the addition of the acryloxy group is realized, the hydrolysis resistance of the adhesive layer is further improved, and the proton exchange membrane composite sealing structure formed by using the double-sided adhesive layer with the adhesive layer is used for preventing the adhesive layer from falling off or losing efficacy and the like due to water generated by the reaction of the fuel cell when being applied to the fuel cell.
The sealing frame layer can be PEN (polyethylene naphthalate), and the thickness and the like can be adjusted according to specific requirements.
The catalyst layer, the gas diffusion layer, the sealing frame layer, etc. described above should be coated or bonded on both upper and lower surfaces of the proton membrane to form a membrane electrode.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (5)
1. A membrane electrode preparation system for a fuel cell, comprising:
a proton membrane unit for supplying and transporting a proton membrane to the binding unit;
the double-sided adhesive layer unit is used for providing and transporting a double-sided adhesive layer with a central hollow part to the bonding unit and comprises a first double-sided adhesive layer bonded to the upper surface of the proton membrane and a second double-sided adhesive layer bonded to the lower surface of the proton membrane; the double-sided adhesive layer is provided with an inner adhesive layer and an outer adhesive layer;
the bonding unit is used for bonding the inner glue layers of the first double-sided glue layer and the second double-sided glue layer to the upper surface and the lower surface of the proton membrane respectively so as to enable the proton membrane to be provided with a glue layer protection frame, and the outer glue layers of the double-sided glue layers are far away from the proton membrane and used for bonding the sealing frame layer of the membrane electrode; the central hollow part is used for accommodating a catalyst layer;
the catalytic diffusion sealing unit is used for bonding the catalyst layer, the gas diffusion layer and the sealing frame layer to the upper surface and the lower surface of the proton membrane to obtain a membrane electrode;
the outer adhesive layer side of the double-sided adhesive layer is provided with an outer release film for protecting the outer adhesive layer after the proton membrane is bonded by the bonding unit, and the catalytic diffusion sealing unit comprises an outer release film rewinder for peeling the outer release film so that the outer adhesive layer is used for bonding the sealing frame layer;
the catalytic diffusion sealing unit comprises a sealing frame layer laminating device which is arranged at the downstream of the external release film rewinding machine, and the proton film after the external release film is peeled off is transported to the sealing frame layer laminating device so as to be bonded with the sealing frame layer on the bonded proton film to obtain a membrane electrode;
the double-sided adhesive layer unit comprises a die cutting machine and an inner release film rewinding machine; the inner adhesive layer side of the double-sided adhesive layer is provided with an inner release film; the double-sided adhesive layer passes through a die cutting machine to form a central hollow-out part of the double-sided adhesive, then an inner release film is peeled off through an inner release film rewinding machine, and the double-sided adhesive layer is transported to an adhesion unit for bonding;
the length of the double-sided adhesive layer in the transverse direction is larger than that of the proton membrane, so that after bonding, the double-sided adhesive layer can seal the transverse edge of the proton membrane in the transverse direction, and the inner adhesive layers of the first double-sided adhesive layer and the second double-sided adhesive layer can be mutually attached to the outer side of the transverse edge of the proton membrane in the transverse direction to form an adhesive layer transverse bonding part;
the proton membrane unit is provided with a cutting machine for cutting the proton membrane in the longitudinal direction to form a proton membrane sheet, and the proton membrane sheet is transported to the bonding unit to be bonded with the first double-sided adhesive layer and the second double-sided adhesive layer; after bonding, the double-sided adhesive layer can seal the longitudinal edge of the proton membrane in the longitudinal direction, and the inner adhesive layers of the first double-sided adhesive layer and the second double-sided adhesive layer can be attached to the outer sides of the longitudinal edge of the proton membrane in the longitudinal direction to form a longitudinal bonding part of the adhesive layers.
2. The membrane electrode preparation system according to claim 1, wherein the catalytic diffusion sealing unit includes a gas diffusion layer attaching means for attaching a gas diffusion layer on the proton membrane.
3. The membrane electrode preparation system according to claim 2, wherein the gas diffusion layer comprises a catalyst layer, the catalyst layer is positioned close to the proton membrane, the gas diffusion layer is positioned away from the proton membrane, and the catalyst layer and the gas diffusion layer are attached by a gas diffusion layer attaching device so as to attach the catalyst layer and the gas diffusion layer to the proton membrane; the catalyst layer is positioned in the central hollow area on the proton membrane.
4. The membrane electrode preparation system according to claim 2, wherein the catalytic diffusion seal unit further comprises a catalyst coating device to coat the proton membrane with a catalyst layer at the central hollowed-out area; and then the gas diffusion layer is bonded to the catalyst layer by the gas diffusion layer bonding device.
5. The membrane electrode preparation system according to claim 1, wherein the double-sided adhesive layer unit further comprises a position sensor for acquiring position information of the double-sided adhesive layer, and comprises a first adhesive layer position sensor for acquiring position information of the first double-sided adhesive layer and a second adhesive layer position sensor for acquiring position information of the second double-sided adhesive layer, so as to control a transmission speed of the double-sided adhesive layer according to the acquired position information, so that the central hollowed portions of the first double-sided adhesive layer and the second double-sided adhesive layer after being bonded to the proton membrane correspond to each other.
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| CN202110057565.3A CN112886041B (en) | 2021-01-15 | 2021-01-15 | Membrane electrode preparation system of fuel cell |
| PCT/CN2021/133643 WO2022151848A1 (en) | 2021-01-15 | 2021-11-26 | System for preparing membrane electrode of fuel cell |
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| CN112886041B (en) * | 2021-01-15 | 2022-12-13 | 苏州泰仑电子材料有限公司 | Membrane electrode preparation system of fuel cell |
| CN112909293A (en) * | 2021-01-15 | 2021-06-04 | 苏州泰仑电子材料有限公司 | Proton exchange membrane composite sealing structure, membrane electrode and fuel cell |
| KR20230154173A (en) * | 2021-03-03 | 2023-11-07 | 도판 인사츠 가부시키가이샤 | Assembly roll of membrane electrode assembly, membrane electrode assembly, and solid polymer fuel cell |
| CN113517459B (en) * | 2021-09-14 | 2022-02-18 | 山东华滋自动化技术股份有限公司 | Process for producing membrane electrode |
| CN114497578A (en) * | 2022-02-14 | 2022-05-13 | 苏州安洁科技股份有限公司 | Gas diffusion layer bonding structure, process method and storage medium |
| CN116936828B (en) * | 2023-07-19 | 2024-04-30 | 浙江海盐力源环保科技股份有限公司 | Efficient fuel cell membrane electrode coating device |
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| CN1839502A (en) * | 2003-08-22 | 2006-09-27 | 约翰逊马西有限公司 | Sealing of a membrane electrode assembly |
| CN102569844A (en) * | 2012-01-17 | 2012-07-11 | 武汉理工新能源有限公司 | Alignment method for preparing membrane electrode sealing border of fuel cell |
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| JP4674789B2 (en) * | 2004-03-31 | 2011-04-20 | 実 梅田 | Membrane electrode element manufacturing method, membrane electrode element and fuel cell |
| CN104617310B (en) * | 2015-02-13 | 2017-01-04 | 昆山桑莱特新能源科技有限公司 | A kind of preparation method of the fuel cell membrane electrode of band sealed frame |
| CN106992305B (en) * | 2017-03-08 | 2019-10-01 | 同济大学 | A kind of fuel cell membrane electrode frame preparation method |
| CN107171008B (en) * | 2017-04-25 | 2019-11-08 | 中国东方电气集团有限公司 | The preparation system of membrane electrode, the preparation method of membrane electrode and fuel cell |
| CN209880736U (en) * | 2019-07-17 | 2019-12-31 | 云南省能源研究院有限公司 | Membrane electrode for hydrogen energy proton exchange membrane fuel cell |
| CN111755726B (en) * | 2020-07-10 | 2024-02-20 | 魔方氢能源科技(江苏)有限公司 | Membrane electrode preparation method, membrane electrode and fuel cell |
| CN112886041B (en) * | 2021-01-15 | 2022-12-13 | 苏州泰仑电子材料有限公司 | Membrane electrode preparation system of fuel cell |
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| CN1839502A (en) * | 2003-08-22 | 2006-09-27 | 约翰逊马西有限公司 | Sealing of a membrane electrode assembly |
| CN102569844A (en) * | 2012-01-17 | 2012-07-11 | 武汉理工新能源有限公司 | Alignment method for preparing membrane electrode sealing border of fuel cell |
| CN108767296A (en) * | 2018-05-15 | 2018-11-06 | 东莞众创新能源科技有限公司 | Fuel cell membrane electrode process units |
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