Enhanced bipolar plate structure and manufacturing method thereof

Abstract

The invention relates to an enhanced bipolar plate structure. The enhanced bipolar plate structure comprises a cathode plate, an anode plate, wherein the cathode plate or the anode plate is provided with a three-layer structure, the first layer is a first graphite resin composite layer, the second layer is a metal fiber graphite resin composite layer, the third layer is a second graphite resin composite layer, and the metal fiber graphite resin composite layer is arranged in the middle area of the cathode plate or the anode plate and peripherally wrapped by the graphite resin composite layer.The cathode plate and the anode plate are bonded into the bipolar plate through glue. The thickness of the first graphite resin composite layer and the thickness of the second graphite resin compositelayer are both 0.1-5 mm, and the thickness of the metal fiber graphite resin composite layer is 0.1-1 mm. According to the invention, metal fibers can greatly improve the structural strength of the graphite resin composite layer; and meanwhile, since the metal fibers are wrapped in the graphite resin composite layer, the metal fibers are isolated from an acid environment generated during operation of a fuel cell and cannot be corroded.

Description

technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to an enhanced bipolar plate structure and a manufacturing method. Background technique [0002] Fuel cell—proton exchange membrane fuel cell (proton exchange membrane fuel cell is abbreviated as PEMFC in English) as a high-efficiency, low-pollution power source has broad applications in future vehicle drive power, portable power and household electricity. It is recognized as an important new energy source in the future. Although PEMFC presents many attractive advantages, it also has some serious shortcomings. In addition to catalytic technology, the main bottlenecks restricting its application are: high manufacturing cost, low volume specific power, etc. As one of the key components of PEMFC, the quality of the bipolar plate accounts for 60% to 80% of the entire fuel cell stack, and its cost accounts for 40% to 60% of the total cost. A simple bipolar plate is one o...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the existing bipolar plates, which have poor corrosion resistance of metal bipolar plates, resulting in short service life of metal bipolar plate stacks, low strength of composite bipolar plates, and easy fracture. By increasing the thickness of graphite plates Although it can solve the defects of low strength and easy fracture, but the problem of high graphite material and high production cost

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