Membrane electrode packaging structure

Abstract

The utility model discloses a membrane electrode packaging structure, which comprises a first double-faced adhesive tape with a hollow area, an anode gas diffusion membrane, a cathode gas diffusion membrane and a catalyst coating membrane, the catalyst coating membrane is provided with an anode surface and a cathode surface, the edge of the anode surface is adhered to the edge of the hollow area on one surface of the first double-faced adhesive tape, and the edge of the cathode gas diffusion membrane is adhered to the edge of the hollow area on the other surface of the first double-faced adhesive tape. The anode gas diffusion film is adhered to the anode surface of the catalyst coating film from the hollow area on the other surface of the first double-faced adhesive tape through a second double-faced adhesive tape, and the cathode gas diffusion film is adhered to the cathode surface of the catalyst coating film through a third double-faced adhesive tape. According to the utility model, the first double-faced adhesive tape is adopted to replace the traditional two-layer PEN hot melt adhesive frame film, so that the material cost is lower; a hot press is not needed for pressing, so that the equipment cost is lower; other sealing structures do not need to be adopted during subsequent processing, so that the subsequent packaging cost can be reduced; the double-faced adhesive tape is adopted to adhere two faces of the anode gas diffusion film, the cathode gas diffusion film and the catalyst coating film, the efficiency is better, and the production cost is lower.

Description

Technical field:

[0001] The utility model belongs to the technical field of hydrogen energy fuel cell membrane electrodes, and particularly relates to a membrane electrode packaging structure. Background technology:

[0002] The packaging structure of the membrane electrode is usually composed of an anode gas diffusion membrane (GDL), a cathode gas diffusion membrane (GDL) and a catalyst coated membrane (CCM). The traditional packaging method is: use a layer of PEN hot melt adhesive frame film on the upper and lower layers of the CCM membrane to encapsulate the edge of the CCM, and then adhere the anode gas diffusion membrane (GDL) and the cathode gas diffusion membrane (GDL) to the two sides of the CCM by dispensing to form a membrane electrode. However, the traditional packaging method has the following shortcomings: 1) Two layers of PEN hot melt adhesive frame film are required, and the PEN hot melt adhesive frame film is expensive, so the cost of the membrane electrode is high; 2) The use of PEN hot melt adhesive frame film packaging requires hot press pressing to achieve packaging; 3) The dispensing process equipment is costly and the processing time is long, so the production cost is also high. Therefore, it is necessary to improve the existing packaging method.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility model content:

[0004] The purpose of the utility model is to provide a membrane electrode packaging structure, so as to overcome the defects in the above-mentioned prior art.

[0005] To achieve the above-mentioned objectives, the utility model provides a membrane electrode packaging structure, comprising a first double-sided adhesive having a hollow area, an anode gas diffusion membrane, a cathode gas diffusion membrane and a catalyst coated membrane, wherein the catalyst coated membrane has an anode surface and a adhesive cathode surface, the edge of the anode surface of the catalyst coated membrane is bonded to the edge of the hollow area on one side of the first double-sided adhesive, the anode gas diffusion membrane is bonded to the anode surface of the catalyst coated membrane from the hollow area on the other side of the first double-sided adhesive through a second double-sided adhesive, and the cathode gas diffusion membrane is bonded to the cathode surface of the catalyst coated membrane through a third double-sided adhesive.

[0006] Further, preferably, the hollow area of ​​the first double-sided adhesive tape is located at the center, and the length and width of the first double-sided adhesive tape are greater than the length and width of the catalyst coated membrane.

[0007] Furthermore, preferably, the first double-sided adhesive tape is a transparent PET double-sided adhesive tape.

[0008] Furthermore, preferably, the second double-sided tape and the third double-sided tape have the same specifications.

[0009] Further, preferably, the second double-sided adhesive tape and the third double-sided adhesive tape are both in a square or strip shape.

[0010] Further, preferably, the second double-sided tape and the third double-sided tape are transparent PTE double-sided tape or transparent PMMA double-sided tape.

[0011] Compared with the prior art, one aspect of the utility model has the following beneficial effects:

[0012] (1) The utility model adopts a first double-sided adhesive to replace the traditional two-layer PEN hot melt adhesive frame film. The double-sided adhesive is cheaper than the PEN hot melt adhesive, which can save the cost of the membrane electrode. At the same time, compared with the PEN hot melt adhesive, the double-sided adhesive only needs to be rolled and bonded at room temperature, without the need for a hot press, and the equipment cost is also lower;

[0013] (2) The utility model uses double-sided adhesive to bond the anode gas diffusion membrane and the cathode gas diffusion membrane to the two sides of the catalyst coating membrane respectively. Compared with traditional glue dispensing, the processing time is shorter, the efficiency is better, and the production cost is lower;

[0014] (3) Since the first double-sided adhesive is used in the present invention, no other sealing structure is needed when the membrane electrode and the bipolar plate are subsequently bonded together, thereby reducing the subsequent packaging cost. Description of the drawings:

[0015] Figure 1 This is a front view of a membrane electrode packaging structure of the utility model;

[0016] Figure 2 This is an exploded schematic diagram of a membrane electrode packaging structure of the utility model;

[0017] Description of the drawings: 1-first double-sided tape, 101-hollow area, 2-anode gas diffusion membrane, 3-cathode gas diffusion membrane, 4-catalyst coating membrane, 401-anode surface, 402-cathode surface, 5-second double-sided tape, 6-third double-sided tape. Specific implementation method:

[0018] The specific implementation modes of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0019] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0020] Embodiment 1:

[0021] like Figure 1-2 As shown, a membrane electrode packaging structure includes a first double-sided adhesive 1 with a hollow area 101, an anode gas diffusion membrane 2, a cathode gas diffusion membrane 3 and a catalyst coated membrane 4, wherein the catalyst coated membrane 4 has an anode surface 401 and a cathode surface 402, the edge of the anode surface 401 of the catalyst coated membrane 4 is bonded to the edge of the hollow area 101 on one side of the first double-sided adhesive 1, the anode gas diffusion membrane 2 is bonded to the anode surface 401 of the catalyst coated membrane 4 from the hollow area 101 on the other side of the first double-sided adhesive 1 through a second double-sided adhesive 5, and the cathode gas diffusion membrane 3 is bonded to the cathode surface 402 of the catalyst coated membrane 4 through a third double-sided adhesive 6.

[0022] In this embodiment, the hollow area 101 of the first double-sided tape 1 is located at the center, and the length and width of the first double-sided tape 1 are both greater than the length and width of the catalyst coating film 4; in this way, after the catalyst coating film 4 is bonded, excess area can be left for subsequent packaging with the bipolar plate as a whole; and because double-sided tape is used, no other materials are needed for sealing during subsequent packaging.

[0023] In this embodiment, the first double-sided adhesive 1 is a transparent PET double-sided adhesive, which adopts a 100μm PET film substrate, and 50μm of tackifying acrylic adhesive is coated on both sides of the PET film substrate, and the viscosity can reach more than 2000gf (ASTMD3330 test standard); the thickness of the substrate and the thickness of the tackifying acrylic adhesive can ensure reliable supporting performance and bonding performance.

[0024] In this embodiment, the second double-sided adhesive tape 5 and the third double-sided adhesive tape 6 have the same specifications; this can ensure that the overall membrane electrode is more beautiful.

[0025] In this embodiment, the second double-sided adhesive tape 5 and the third double-sided adhesive tape 6 are both block-shaped or strip-shaped structures; specifically, they can be a plurality of square-shaped double-sided adhesive tapes, or they can also be a plurality of strip-shaped double-sided adhesive tapes. Compared with the traditional dispensing process, the processing time can be shortened and the processing efficiency can be improved.

[0026] In this embodiment, the second double-sided adhesive tape 5 and the third double-sided adhesive tape 6 are transparent PTE double-sided adhesive tape or transparent PMMA double-sided adhesive tape.

[0027] During packaging, first, the anode surface 401 of the catalyst coated membrane 4 (also called CCM membrane) is bonded to the frame of the hollow area 101 of the first double-sided tape 1; then, the anode gas diffusion membrane 2 (also called anode GDL membrane) is bonded to the anode surface 401 of the CCM membrane using the second double-sided tape 5; then, the cathode gas diffusion membrane 3 (also called cathode GDL membrane) is bonded to the cathode surface 402 of the CCM membrane using the third double-sided tape 6; and finally, it is punched into the finished shape of the membrane electrode.

[0028] The utility model adopts a first double-sided adhesive 1 to replace the traditional two-layer PEN hot melt adhesive frame film. The double-sided adhesive is cheaper than PEN hot melt adhesive, which can save the cost of membrane electrode. At the same time, compared with PEN hot melt adhesive, the double-sided adhesive only needs to be rolled and bonded at room temperature, without the need for a hot press, and the equipment cost is also lower. Moreover, when the membrane electrode and the bipolar plate are subsequently bonded, no other sealing structure is required, which can reduce the subsequent packaging cost.

[0029] The utility model uses the second double-sided adhesive tape 5 and the third double-sided adhesive tape 6 to bond the anode gas diffusion membrane 2 and the cathode gas diffusion membrane 3 to the two sides of the catalyst coating membrane 4 respectively. Compared with the traditional dispensing glue, the processing time is shorter, the efficiency is better, and the production cost is lower.

[0030] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A membrane electrode packaging structure, characterized in that: It comprises a first double-sided adhesive tape having a hollow area, an anode gas diffusion membrane, a cathode gas diffusion membrane and a catalyst-coated membrane, wherein the catalyst-coated membrane has an anode surface and a cathode surface, the edge of the anode surface of the catalyst-coated membrane is bonded to the edge of the hollow area on one side of the first double-sided adhesive tape, the anode gas diffusion membrane is bonded to the anode surface of the catalyst-coated membrane through the hollow area on the other side of the first double-sided adhesive tape through the second double-sided adhesive tape, and the cathode gas diffusion membrane is bonded to the cathode surface of the catalyst-coated membrane through the third double-sided adhesive tape.

2. A membrane electrode package structure according to claim 1, characterized in that: The hollow area of ​​the first double-sided adhesive tape is located at the center, and the length and width of the first double-sided adhesive tape are both greater than the length and width of the catalyst coating film.

3. A membrane electrode package structure according to claim 1 or 2, characterized in that: The first double-sided adhesive tape is a transparent PET double-sided adhesive tape.

4. The membrane electrode package structure according to claim 1, characterized in that: The second double-sided tape and the third double-sided tape have the same specifications.

5. The membrane electrode package structure according to claim 1, characterized in that: The second double-sided adhesive tape and the third double-sided adhesive tape are both in a square or strip shape.

6. The membrane electrode package structure according to claim 1, characterized in that: The second double-sided adhesive tape and the third double-sided adhesive tape are transparent PTE double-sided adhesive tape or transparent PMMA double-sided adhesive tape.

Images