Fuel cell bipolar plate

Abstract

The invention discloses a fuel cell bipolar plate, which comprises an anode plate, a cathode plate and two cooling plates, wherein the anode plate is sequentially superimposed, covered and connected with one cooling plate from bottom to top, the cathode plate is sequentially superimposed, covered and connected with the other cooling plate from top to bottom, the anode plate and the cathode plate constitute a fuel cell unit with a membrane electrode clamped between the anode plate and the cathode plate, the upper surface of the anode plate is provided with a hydrogen horizontal flow channel, the upper surface of the cathode plate is provided with an air horizontal flow channel, and the upper surface of each cooling plate is provided with a cooling liquid horizontal flow channel; and the anode plate, the cathode plate and the cooling plates are respectively provided with a plurality of hydrogen vertical flow channels, air vertical flow channels and cooling liquid vertical flow channels.The bipolar plate is small in flow resistance and can enable the temperature field inside the cell to be uniform in distribution.

Description

technical field [0001] The invention belongs to the field of fuel cells and relates to a fuel cell bipolar plate. Background technique [0002] At present, with the extensive use of fossil fuels, the greenhouse effect has become one of the most pressing environmental issues in the world, thus generating a strong demand for new clean energy technologies. Fuel cells are attracting more and more attention as a clean energy. Among various types of fuel cells, the proton exchange membrane fuel cell (PEMFC) is the most promising one, which has the advantages of high energy conversion efficiency, low operating temperature, multiple fuels, no noise and zero emissions. [0003] A PEMFC unit is composed of bipolar plates (anode plate and cathode plate) and a membrane electrode assembly (MEA) sandwiched between the bipolar plates. The MEA is responsible for the electrochemical reaction, while the bipolar plate mainly supports, collects, separates the fuel and the oxidant, and guides ...

AI Technical Summary

Problems solved by technology

[0004] Existing studies have shown that if the design of the plate flow field is unreasonable and the flow resistance is large, the supply of fuel and oxidant will be uneven, and the water produced by the reaction cannot be drained in time, which will seriously hinder the progress of the electrochemical reaction and destroy the internal stability of the battery. Uniform temperature distribution, resulting in a decrease in the performance and life of PEMFC

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