A proton exchange membrane electrode package and its electrode structure

Abstract

This utility model relates to the field of proton exchange membrane electrode technology, and in particular to a proton exchange membrane electrode package and its electrode structure. It includes an electrode body with symmetrically arranged packaging frames on its upper and lower sides. A packaging groove matching the specifications of the electrode body is formed at one end of the packaging frame near the electrode body. An inner frame matching the specifications is formed on the inner end face of the packaging groove. The inner frame is a composite structure comprising a positioning layer, a heat insulation layer, and a bonding layer. A positioning component is provided between the positioning layer and the inner end face of the packaging groove. Multiple sets of heat insulation cavities are arranged at equal intervals within the heat insulation layer. Multiple sets of bonding holes are arranged at equal intervals on the bonding layer. The inner frame is installed on the inner end face of the packaging groove via the positioning component. This utility model can reduce the impact of temperature conduction on the membrane electrode during hot pressing of the packaging frame, preventing localized damage to the membrane electrode and ensuring its performance and lifespan.

Description

Technical Field

[0001] This utility model relates to the field of proton exchange membrane electrode technology, specifically a proton exchange membrane electrode package and its electrode structure. Background Technology

[0002] The proton exchange membrane electrode is a key component of a proton exchange membrane fuel cell. It consists of a catalyst layer, a gas diffusion layer, and a proton exchange membrane. The catalyst layer usually contains a noble metal catalyst such as platinum, which can effectively catalyze the redox reaction of hydrogen and oxygen, so that hydrogen is decomposed into protons and electrons at the anode and oxygen is reduced at the cathode. The gas diffusion layer is responsible for uniformly transporting the reaction gases to the surface of the catalyst layer and removing the water produced by the reaction. The proton exchange membrane allows protons to pass through but blocks electrons, thus forcing electrons to pass through the external circuit to form an electric current.

[0003] This electrode structure design enables proton exchange membrane fuel cells to have advantages such as high energy conversion efficiency, fast response capability and low temperature start-up, and they are widely used in automotive power, distributed power generation and other fields.

[0004] During the encapsulation of proton exchange membrane electrodes, a hot-pressing process is required using a packaging frame to seal the edges of the membrane electrode. The hot-pressing temperature of the packaging frame is around 130°C, while the membrane electrode will deform or be damaged at around 80°C. When the packaging frame is hot-pressed at around 130°C, the temperature of the packaging frame itself will be conducted to the edge of the membrane electrode. This heat conduction will cause the temperature of the edge area of ​​the membrane electrode to rise, leading to a decrease in the chemical stability and mechanical properties of the membrane electrode, and even causing local damage, which seriously affects the performance and lifespan of the membrane electrode. Therefore, a proton exchange membrane electrode packaging component is proposed to address the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a proton exchange membrane electrode package that can reduce the impact of temperature conduction on the membrane electrode during hot pressing of the package frame, avoid local damage to the membrane electrode, and ensure the performance and lifespan of the membrane electrode, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A proton exchange membrane electrode package includes an electrode body with symmetrically arranged encapsulation frames on its upper and lower sides. An encapsulation groove matching the specifications of the electrode body is formed at one end of the encapsulation frame near the electrode body. An inner frame matching the specifications is formed on the inner end face of the encapsulation groove. The inner frame is a composite structure comprising a positioning layer, a heat insulation layer, and an adhesive layer. A positioning component is provided between the positioning layer and the inner end face of the encapsulation groove. Multiple sets of heat insulation cavities are equidistantly arranged within the heat insulation layer. Multiple sets of adhesive holes are equidistantly arranged on the adhesive layer. The inner frame is mounted to the inner end face of the encapsulation groove via the positioning component.

[0008] As a further optimization of this utility model, the spacing between the two inner frame borders is consistent with the thickness of the electrode body.

[0009] As a further optimization of this utility model, the positioning layer is disposed on the side of the encapsulation groove near the end face of the encapsulation groove, the heat insulation layer is disposed on the side of the positioning layer away from the encapsulation groove, and the bonding layer is disposed on the side of the heat insulation layer away from the positioning layer.

[0010] As a further optimization of this utility model, the positioning component includes multiple sets of positioning blocks arranged at equal intervals and fixedly connected to one side of the positioning layer near the end face of the encapsulation groove, and multiple sets of positioning grooves are arranged at equal intervals on the inner end face of the encapsulation groove.

[0011] As a further optimization of this utility model, the positioning block is hemispherical, and the number of positioning blocks and positioning slots are equal, their positions correspond, and their specifications match.

[0012] As a further optimization of this utility model, the cross-sectional shape of the heat insulation cavity is an equilateral triangle, with the vertex of the equilateral triangle located at the top and the base parallel to the horizontal plane.

[0013] As a further optimization of this utility model, the bonding hole is located at the end of the bonding layer away from the encapsulation groove, and the bonding hole is configured as a suction cup.

[0014] An electrode structure comprising a proton exchange membrane electrode package as described in any one of the preceding claims.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In this invention, the edge of the electrode body can be encapsulated by the encapsulation frame. The encapsulation groove can not only provide space for the inner frame, but also provide space for the electrode body. The inner frame can improve the encapsulation effect of the electrode body, reduce the impact of temperature conduction on the electrode body during hot pressing of the encapsulation frame, avoid local damage to the electrode body, and ensure the performance and life of the electrode body. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is an exploded view of the present invention;

[0019] Figure 3 This is a schematic diagram of the inner frame of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the positioning layer of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the heat insulation layer of this utility model;

[0022] Figure 6 This is a schematic diagram of the bonding layer structure of this utility model;

[0023] Figure 7 This utility model Figure 4 Enlarged view of point A;

[0024] Figure 8 This utility model Figure 5 Enlarged view of point B;

[0025] Figure 9 This utility model Figure 6 Enlarged view of point C.

[0026] In the figure: 1. Electrode body; 2. Encapsulation frame; 3. Encapsulation groove; 4. Inner frame; 41. Positioning layer; 42. Heat insulation layer; 43. Adhesion layer; 44. Positioning component; 441. Positioning block; 442. Positioning groove; 45. Heat insulation cavity; 46. Adhesion hole. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Please see Figures 1-9 This utility model provides a technical solution:

[0030] A proton exchange membrane electrode package includes an electrode body 1. The upper and lower sides of the electrode body 1 are symmetrically provided with packaging frames 2. The end of the packaging frame 2 near the electrode body 1 is provided with a packaging groove 3 that matches the specifications of the electrode body 1. The inner end face of the packaging groove 3 is provided with an inner frame 4 that matches the specifications. The inner frame 4 is a composite structure, which includes a positioning layer 41, a heat insulation layer 42 and an adhesive layer 43. A positioning component 44 is provided between the positioning layer 41 and the inner end face of the packaging groove 3. The inner cavity of the heat insulation layer 42 is provided with multiple sets of heat insulation cavities 45 arranged at equal intervals. The adhesive layer 43 is provided with multiple sets of adhesive holes 46 arranged at equal intervals. The inner frame 4 is installed on the inner end face of the packaging groove 3 by the positioning component 44.

[0031] As a further implementation of this solution, the spacing between the two inner frame 4 is consistent with the thickness of the electrode body 1. When the two encapsulation frame 2 are attached to each other, the spacing between the two inner frame 4 can provide a space for the electrode body 1.

[0032] As a further implementation of this solution, the positioning layer 41 is disposed in the encapsulation groove 3 on the side close to the end face of the encapsulation groove 3, the heat insulation layer 42 is disposed on the side of the positioning layer 41 away from the encapsulation groove 3, and the bonding layer 43 is disposed on the side of the heat insulation layer 42 away from the positioning layer 41. The positioning layer 41 can be better connected to the encapsulation groove 3 through the positioning component 44, the heat insulation layer 42 can isolate some of the temperature conducted from the encapsulation frame 2 and reduce the impact of high temperature on the electrode body 1, and the bonding layer 43 can better contact and bond with the electrode body 1.

[0033] As a further implementation of this solution, the positioning component 44 includes multiple sets of positioning blocks 441 arranged at equal intervals and fixedly connected to the side of the positioning layer 41 near the end face of the encapsulation groove 3. Multiple sets of positioning grooves 442 are arranged at equal intervals on the inner end face of the encapsulation groove 3. The positioning blocks 441 are hemispherical. The number of positioning blocks 441 and the positioning grooves 442 are equal, their positions are corresponding, and their specifications are matched. By inserting the positioning blocks 441 into the positioning grooves 442, the connection effect between the positioning layer 41 and the encapsulation groove 3 can be improved.

[0034] As a further implementation of this scheme, the cross-sectional shape of the heat insulation cavity 45 is an equilateral triangle with the vertex of the equilateral triangle located at the top and the base parallel to the horizontal plane. Triangles have good structural stability, and equilateral triangles have even better structural stability, which can ensure its own heat insulation effect while greatly improving the structural stability of the heat insulation layer 42.

[0035] As a further implementation of this solution, the bonding hole 46 is opened at the end of the bonding layer 43 away from the encapsulation groove 3. The bonding hole 46 is shaped like a suction cup. The suction cup-shaped bonding hole 46 can form a local vacuum between the electrode body 1 and the bonding layer 43. The electrode body 1 is tightly adsorbed onto the bonding layer 43 by atmospheric pressure, thereby enhancing the tightness of the bonding.

[0036] An electrode structure comprising a proton exchange membrane electrode package including any one of the above.

[0037] Workflow: During encapsulation, firstly, the inner frame 4 is installed into the encapsulation groove 3 using the positioning component 44. Then, the positioning block 441 on the positioning layer 41 is inserted into the corresponding positioning groove 442. Next, the electrode body 1 is placed on the inner frame 4 within the lower encapsulation groove 3, and the upper encapsulation groove 3 is placed on the lower encapsulation groove 3 with the corners aligned. When the two encapsulation frames 2 are attached together, the gap between the two inner frames 4 provides sufficient space for the electrode body 1. At this point, the four sides of the electrode body 1 will contact the bonding layer 43. The suction cup-shaped bonding holes 46 on the bonding layer 43 create a partial vacuum between the electrode body 1 and the bonding layer 43. Through atmospheric pressure, the electrode body 1 is tightly adhered to the bonding layer 43. To enhance the tightness of the fit, the packaging frame 2 is heated and pressed down using a hot pressing device. The packaging frame 2 is heated to 130°C. When the packaging frame 2 is hot-pressed at a temperature of about 130°C, the temperature is conducted to the inner frame 4. When the temperature is conducted to the heat insulation layer 42, the heat insulation cavity 45 opened in the heat insulation layer 42 can reduce the path of heat directly passing through the heat insulation layer 42, thereby reducing the heat conduction efficiency. This reduces the impact of temperature conduction on the electrode body 1 during the hot pressing of the packaging frame 2, avoids local damage to the electrode body 1, and ensures the performance and life of the electrode body 1. In addition, the equilateral triangular heat insulation cavity 45 has better stability, which can ensure its own heat insulation effect while greatly improving the structural stability of the heat insulation layer 42.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A proton exchange membrane electrode package comprising an electrode body (1), characterized in that: The electrode body (1) is provided with symmetrical encapsulation frames (2) on the upper and lower sides. The encapsulation frame (2) is provided with an encapsulation groove (3) that matches the specifications of the electrode body (1) at one end near the electrode body (1). The inner end face of the encapsulation groove (3) is provided with an inner frame (4) that matches the specifications. The inner frame (4) is a composite structure, which includes a positioning layer (41), a heat insulation layer (42) and an adhesive layer (43). A positioning component (44) is provided between the positioning layer (41) and the inner end face of the encapsulation groove (3). Multiple sets of heat insulation cavities (45) are arranged at equal intervals in the inner cavity of the heat insulation layer (42). Multiple sets of adhesive holes (46) are arranged at equal intervals on the adhesive layer (43). The inner frame (4) is mounted on the inner end face of the encapsulation groove (3) by a positioning component (44).

2. The proton exchange membrane electrode package according to claim 1, characterized in that: The spacing between the two inner frame edges (4) is consistent with the thickness of the electrode body (1).

3. The proton exchange membrane electrode package according to claim 1, characterized in that: The positioning layer (41) is disposed in the encapsulation groove (3) on the side close to the end face of the encapsulation groove (3), the heat insulation layer (42) is disposed on the side of the positioning layer (41) away from the encapsulation groove (3), and the bonding layer (43) is disposed on the side of the heat insulation layer (42) away from the positioning layer (41).

4. The proton exchange membrane electrode package according to claim 1, characterized in that: The positioning component (44) includes multiple sets of positioning blocks (441) arranged at equal intervals and fixedly connected to one side of the positioning layer (41) near the end face of the encapsulation groove (3). Multiple sets of positioning grooves (442) are arranged at equal intervals on the inner end face of the encapsulation groove (3).

5. A proton exchange membrane electrode package according to claim 4, characterized in that: The positioning block (441) is hemispherical, and the positioning block (441) and the positioning groove (442) are equal in number, corresponding in position and matching in specifications.

6. The proton exchange membrane electrode package according to claim 1, characterized in that: The heat insulation cavity (45) has an equilateral triangle cross-sectional shape, with the apex of the equilateral triangle located at the top and the base parallel to the horizontal plane.

7. The proton exchange membrane electrode package according to claim 1, characterized in that: The bonding hole (46) is located at one end of the bonding layer (43) away from the encapsulation groove (3), and the bonding hole (46) is shaped like a suction cup.

8. An electrode structure, characterized in that: The proton exchange membrane electrode package includes any one of claims 1-7.

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