Integrated membrane pad for hydrogen production electrode frame

Abstract

The integrated membrane pad for the hydrogen production electrode frame comprises a rubber pad (1) and an exchange membrane (2), the periphery of the exchange membrane (2) is embedded in the rubber pad (1) of a frame-shaped structure, the width of the part, embedded in the rubber pad (1), of the exchange membrane (2) is smaller than that of the rubber pad (1), and the rubber pad (1) is of a square-frame-shaped structure or a circular-ring-shaped structure. The integrated membrane pad for the hydrogen production electrode frame has the advantages of being good in sealing effect and convenient and fast to install.

Description

Technical Field

[0001] The utility model relates to a membrane pad with an integrated structure, in particular to a membrane pad structure used in the water electrolysis hydrogen production industry, and belongs to the innovative application of rubber technology in the field of new energy hydrogen production. Background Art

[0002] Currently, PEM water electrolysis (also known as proton exchange membrane water electrolysis) is the most widely used hydrogen production method. Its operating principle is as follows: Direct current decomposes water within the electrolyzer, producing hydrogen on the cathode surface and oxygen on the anode surface. The plates and frame within the electrolyzer are core components, supporting the electrodes and diaphragm and providing electrical conductivity. The diaphragm (also known as the exchange membrane) primarily prevents the mixing of hydrogen and oxygen and is sealed within the frame by a gasket.

[0003] Therefore, the diaphragm needs to be precisely installed in the pole frame and in contact with the sealing part of the sealing gasket to achieve a high sealing effect. Therefore, during the installation of the pole frame, extremely high requirements are placed on coordination and precise installation. Various auxiliary tooling is required to ensure accurate installation, which makes the entire installation process not only cumbersome but also inefficient. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide an integrated membrane pad for a hydrogen production electrode frame, which has the advantages of good sealing effect and convenient and quick installation.

[0005] The purpose of this utility model is achieved in this way:

[0006] An integrated membrane pad for a hydrogen production electrode frame comprises a rubber pad and an exchange membrane. The four sides of the exchange membrane are embedded in the rubber pad of a frame structure, and the width of the portion of the exchange membrane embedded in the rubber pad is smaller than that of the rubber pad.

[0007] Preferably, the rubber pad is a square frame structure or a circular ring structure.

[0008] Preferably, the rubber pad inner liner has a connecting reinforcement plate, and the four sides of the exchange membrane are hung on the connecting reinforcement plate.

[0009] Preferably, an upward-curved card block is separated from the connecting reinforcement plate, and after the exchange membrane is hung on the card block, the card block is pressed downwardly back into the connecting reinforcement plate.

[0010] Preferably, the card block is a triangular structure.

[0011] Preferably, the connecting reinforcement plate is a frame-shaped structure, or the connecting reinforcement plate is arranged in multiple sections at intervals in the rubber pad.

[0012] Preferably, viewed from the width direction, the connection reinforcement plate is located in the middle of the rubber pad.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The present utility model forms an integral structure with a rubber pad and a (proton) exchange membrane. During installation, the integral installation can be carried out, which not only greatly improves the installation efficiency (without the need for on-site operations such as size matching and press-fitting sealing of the exchange membrane), but also the integral structure ensures the sealing performance under the rapid installation method. Since the exchange membrane and the rubber pad have formed a complete integral structure before leaving the factory in the workshop and passed the sealing performance inspection, during on-site installation, only the sealing performance between the sealing pad and structures such as the bipolar plate needs to be ensured, which is very easy to achieve. Thus, it avoids the need for repeated testing and ensuring the sealing between the exchange membrane and the rubber gasket or other sealing structures of the equipment in the conventional structure, greatly simplifies the installation process, improves the efficiency, and ensures the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of an integral membrane pad for a hydrogen production bipolar plate of the present utility model.

[0016] Figure 2 It is a partial schematic view of the connecting and reinforcing plate in the present utility model.

[0017] Figure 3 It is a side view of the connecting and reinforcing plate in the present utility model.

[0018] Figure 4 It is a schematic view of the structure in which the exchange membrane and the connecting and reinforcing plate are wrapped in the rubber pad in the present utility model.

[0019] Figure 5 It is a schematic view of the structure of the exchange membrane and the connecting and reinforcing plate in the present utility model.

[0020] Wherein:

[0021] rubber pad 1, exchange membrane 2, connecting and reinforcing plate 3;

[0022] ribs 1.1, connecting holes 1.2;

[0023] notches 3.1, blocks 3.2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] See Figures 1 - 5, a one-piece membrane pad for a hydrogen production bipolar plate according to the present utility model includes a rubber pad 1 and an exchange membrane 2. A rubber pad 1 with a ring structure is arranged around the exchange membrane 2, and the periphery of the exchange membrane 2 is embedded in the rubber pad 1. The width of the part of the exchange membrane 2 embedded in the rubber pad 1 is less than the width of the rubber pad 1. Thus, the exchange membrane 2 is tensioned and installed in the rubber pad 1 by the rubber pad 1 in the form of a continuous ring structure arranged around the exchange membrane 2. When in use, the one-piece membrane pad of this patent can be directly installed in the bipolar plate to achieve rapid installation. And the one-piece membrane pad of this patent adopts an integral structure, and the sealing structure of the rubber pad 1 and the exchange membrane 2 has been completed before leaving the factory. Because on-site only the whole needs to be installed, there is no need to spend extra time and effort on installing and sealing and protecting the exchange membrane 2, which not only increases the installation efficiency but also improves the sealing effect.

[0025] Meanwhile, in order to further improve the bonding force between the periphery of the exchange membrane 2 and the rubber pad 1, a connection reinforcement plate 3 is lined in the rubber pad 1 for bonding with the periphery of the exchange membrane 2 to provide sufficient fastening force. It can adopt the method as Figure 2 shown. Now, triangular blocks 3.2 are stamped on the connection reinforcement plate 3, and one side of the triangular block 3.2 of the triangular structure is connected to the connection reinforcement plate 3, and the other two sides are stamped and cut off. And after the block 3.2 is jacked up, a notch 3.1 is left on the connection reinforcement plate 3, and the triangular top angle of the jacked-up block 3.2 faces upward (as Figure 3 shown). After the periphery of the exchange membrane 2 is hooked on the triangular top angle of the block 3.2, the jacked-up block 3.2 is pressed down and embedded back into the notch 3.1, so as to firmly press the exchange membrane 2 hooked on the block 3.2, thereby increasing the connection firmness of the exchange membrane 2.

[0026] Finally, according to the needs of customers, the integral structure composed of the rubber pad 1 and the exchange membrane 2 can be a square structure, a circular structure, etc., which are structural forms matching the customer's equipment.

[0027] In addition: it should be noted that the above specific implementation manner is only an optimized solution of this patent, and any modification or improvement made by those skilled in the art according to the above conceptions is within the protection scope of this patent.

Claims

1. An integrated membrane pad for a hydrogen production bipolar plate, characterized in that: It includes a rubber gasket (1) and an exchange membrane (2). The periphery of the exchange membrane (2) is embedded in the rubber gasket (1) with a frame structure, and the width of the part of the exchange membrane (2) embedded in the rubber gasket (1) is smaller than the width of the rubber gasket (1).

2. The integrated membrane pad for a hydrogen production bipolar plate according to claim 1, wherein: The rubber gasket (1) has a square frame structure or a circular ring structure.

3. The integrated membrane pad for a hydrogen production bipolar plate according to claim 1, wherein: A connection reinforcement plate (3) is lined inside the rubber gasket (1), and the periphery of the exchange membrane (2) is hung on the connection reinforcement plate (3).

4. The integrated membrane pad for a hydrogen production bipolar plate according to claim 3, wherein: A raised block (3.2) is divided on the connection reinforcement plate (3). After the exchange membrane (2) is hung on the block (3.2), the block (3.2) is pressed downward back into the connection reinforcement plate (3).

5. The integrated membrane gasket for the hydrogen production bipolar plate according to claim 4, characterized in that: The block (3.2) has a triangular structure.

6. The integrated membrane gasket for a hydrogen production bipolar plate according to claim 3, wherein: The connection reinforcement plate (3) has a frame structure, or the connection reinforcement plate (3) is arranged in multiple segments at intervals inside the rubber gasket (1).

7. The integrated membrane gasket for a hydrogen production bipolar plate according to claim 6, characterized in that: Viewed from the width direction, the connection reinforcement plate (3) is located in the middle of the rubber gasket (1).

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