Bipolar plate for fuel cell

Abstract

The invention relates to a bipolar plate for a fuel cell. The bipolar plate comprises a plate core module, a peripheral module and a plurality of connecting modules, wherein the plate core module is provided with a flow field unit, the peripheral module is a frame structure, and the plate core module is installed inside the frame structure through the plurality of connecting modules; the outer edge of the plate core module, the inner edge of the peripheral module and the connecting module form a plurality of hollow structures, and part of the hollow structures are gas channels or liquid channels of the fuel cell; the connecting module comprises a first connecting part and a second connecting part, the first connecting part is connected with the outer edge of the board core module, the second connecting part is connected with the inner edge of the peripheral module, and the first connecting part and the second connecting part are detachably connected with each other. Compared with the prior art, the flexible and insulativity requirements of fuel cell stack design can be met, the product application range is widened, the modification and manufacturing cost is reduced, and later modification and maintenance are facilitated.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a bipolar plate used for fuel cells. Background technique [0002] The proton exchange membrane fuel cell is a kind of electrochemistry that decomposes anode hydrogen into protons and electrons through a catalyst. The device has the advantages of high efficiency, low temperature, clean and environmental protection. [0003] The structure of proton exchange membrane fuel cell can be divided into the active part that reacts and releases energy, and the reactive part that does not react and release energy. The reactive part includes structures such as fluid distribution and sealing, which are necessary components for the active part to realize its function. [0004] The bipolar plate of the existing proton exchange membrane fuel cell generally adopts the form of a whole pole plate, and the whole pole plate contains active parts and reactive parts at the same time. This structu...

AI Technical Summary

Problems solved by technology

This structure has the following problems: 1. A whole bipolar plate should not only meet the corrosion-resistant and conductive requirements of the active part, but also meet the functional requirements of the sealing and insulation of the reactive part, which improves the process requirements of the whole plate

2. The production method of a whole plate cannot realize the flexible matching of different flow field designs and distribution sealing structure designs in various application scenarios

3. Direct contact between the bipolar plate and the shell is prone to leakage, which poses a safety hazard

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