High efficiency bipolar plate assembly

Abstract

The utility model discloses an efficient bipolar plate component which comprises a bipolar plate and EPDM (Ethylene-Propylene-Diene Monomer) sealing elements sealed on two side surfaces of the bipolar plate, an outlet diversion area is arranged at the upper end of the EPDM sealing element on each side, and the outlet diversion areas are communicated with a gas outlet and a reaction area where the corresponding side surface of the bipolar plate is located; and the size of the part, connected with the gas outlet end, of the outlet flow guide area is smaller than that of the part, connected with the reaction area, of the outlet flow guide area. According to the bipolar plate disclosed by the utility model, the flow guide areas are arranged on the EPDM sealing pieces on the two sides of the bipolar plate, so that the aim of guiding gas generated on a reaction area of the bipolar plate to be discharged can be achieved, the speed of the gas escaping from a bipolar plate assembly is increased, and the overall decomposition efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of high-efficiency bipolar plate assemblies. BACKGROUND

[0002] The function of bipolar plate (also known as separator) is to provide gas flow channel, prevent hydrogen and oxygen in battery gas chamber from colluding, and establish current path between series-connected cathode and anode.

[0003] Bipolar plate assembly is the core component in electrolytic reactor, and common bipolar plate assembly is combined by bipolar plate located in middle part and sealing element arranged on both sides of bipolar plate. Figure 1 As shown, both sides of bipolar plate are respectively provided with reaction zone, and the middle of sealing element is provided with embedding hole avoiding reaction zone. Front sealing element and rear sealing element clamp and seal bipolar plate in the middle, and a gas outlet gap is maintained between corresponding side of sealing element and bipolar plate. Gas generated by reaction zone on both sides of bipolar plate then goes out from gas outlet gap.

[0004] It is found through use that in reaction process, decomposed bubbles are stacked to form large bubbles, which then slowly move upward along reaction zone little by little, and when reaction zone is filled, gas enters into the entrance of gas outlet gap between sealing element and bipolar plate, and then goes out from gas outlet gap, especially in bipolar plate composed of hole net. When electrolysis reaction is accelerated, a large amount of bubbles are generated and accumulated at the entrance of gas outlet gap between sealing element and bipolar plate, which affects the speed of gas going out, and then reduces the overall decomposition efficiency. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the present application provides a kind of high-efficiency bipolar plate assembly, which aims to improve the speed of gas escaping from bipolar plate assembly and improve the overall decomposition efficiency.

[0006] To achieve the above technical purpose, the present application adopts the following technical scheme:

[0007] A kind of high-efficiency bipolar plate assembly, including bipolar plate and EPDM sealing element sealed on both sides of the bipolar plate, wherein an outlet flow guide zone is opened at the upper end of the EPDM sealing element on each side, the outlet flow guide zone is connected with gas outlet and the reaction zone on the corresponding side of the bipolar plate;The size of the gas outlet end connected by the outlet flow guide zone is smaller than the size of the reaction zone connected by the outlet flow guide zone.

[0008] Preferably, an inlet flow guide zone is also opened at the lower end of each EPDM sealing element, and the inlet flow guide zone and the outlet flow guide zone are diagonally arranged.

[0009] Preferably, the outlet flow guide area of the EPDM sealing member on different sides of the bipolar plate and the inlet flow guide area are in opposite directions.

[0010] By using the technical scheme, the bipolar plate of the utility model can guide the gas generated in the reaction area of the bipolar plate to be discharged, improve the speed of the gas escaping from the bipolar plate assembly, and improve the overall decomposition efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a structural schematic view of an existing bipolar plate;

[0012] Figure 2 is a structural schematic view of the high-efficiency bipolar plate of the utility model;

[0013] Figure 3 is Figure 2 a decomposition schematic view. DETAILED DESCRIPTION

[0014] The technical scheme of the utility model will be further specifically explained below by means of examples and in combination with the drawings.

[0015] Referring to Figure 2 the utility model discloses a high-efficiency bipolar plate assembly, which comprises a bipolar plate 1 and EPDM sealing members 2 sealed on two side surfaces of the bipolar plate 1.

[0016] In this embodiment, an outlet flow guide area 21 and an inlet flow guide area 22 are respectively arranged on the upper end and the lower end of the EPDM sealing member 2 on the two side surfaces of the bipolar plate 1. The outlet flow guide area 21 is connected with a gas outlet and a reaction area on the corresponding side surface of the bipolar plate. The inlet flow guide area 22 is connected with a liquid inlet and a reaction area on the corresponding side surface of the bipolar plate.

[0017] As Figure 2 shown, the size of the outlet flow guide area 21 connected with the gas outlet end is smaller than the size of the outlet flow guide area 21 connected with the reaction area. Therefore, the generated gas can be orderly discharged from the outlet flow guide area 21.

[0018] The inlet flow guide area 22 and the outlet flow guide area 21 are in a diagonal inclined relationship, and a certain traction force is formed between the gas outlet and the liquid inlet. The tiny gas bubbles generated in the reaction area of the bipolar plate are dragged to move along the diagonal direction, thereby avoiding the problem that the gas bubbles generated in the reaction area of the existing bipolar plate are stacked in the reaction area and can only be discharged layer by layer. The speed of the gas escaping from the bipolar plate assembly is increased, and the overall decomposition efficiency is improved. At the same time, due to the improvement of the gas discharge efficiency, the surface of the reaction area of the bipolar plate can be quickly contacted with the electrolyte, thereby improving the overall decomposition efficiency.

[0019] In addition, the outlet guide area of the EPDM seal located at different sides of the bipolar plate and the inlet guide area are in opposite directions, facilitating the pipeline layout of the two gases.

[0020] In summary, the utility model discloses simple structure, but can effectively promote the speed of gas escape bipolar plate assembly and increase the overall decomposition efficiency.

[0021] The above-mentioned embodiments are only used for describing the utility model and not for limiting the range of the utility model. The equal changes and modifications of the utility model made by the person skilled in the art all belong to the scope covered by the claims attached to the utility model.

Claims

1. A high efficiency bipolar plate assembly, characterized by, The application relates to a bipolar plate and EPDM seals sealed on both sides of the bipolar plate, wherein an outlet flow guide area is arranged at the upper end of the EPDM seal on each side, the outlet flow guide area is communicated with a gas outlet and a reaction area where the corresponding side of the bipolar plate is located; the size of the end of the gas outlet connected with the outlet flow guide area is smaller than the size of the reaction area connected with the outlet flow guide area.

2. The high efficiency bipolar plate assembly of claim 1, wherein, The lower end of each EPDM seal is also provided with an inlet flow guide area, and the inlet flow guide area is arranged in a diagonal line with the outlet flow guide area.

3. The high efficiency bipolar plate assembly of claim 2, wherein, The outlet flow guide areas and the inlet flow guide areas of the EPDM seals on different sides of the bipolar plate are in opposite directions.

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