Novel gas flow channel structure for bipolar plate of proton exchange membrane fuel cell

Abstract

The invention discloses a novel gas flow channel structure for a bipolar plate of a proton exchange membrane fuel cell, the bipolar plate of the proton exchange membrane fuel cell mainly comprises an anode plate and a cathode plate, and the gas flow channel structure is formed by staggered arrangement of flow guide columns with concave quadrilateral sections in a fish scale shape; a delta wing, close to the inlet of the flow channel, of the flow guide column points to the gas inflow direction, a column of flow guide column delta wings close to the outlet of the flow channel point to the gas outflow direction, a gas main body flow channel is a corrugated flow channel formed by staggered arrangement of flow guide columns, and gap flow channels exist between the corrugated flow channels. According to the invention, the distribution uniformity of the reaction gas in the bipolar plate of the proton exchange membrane fuel cell can be effectively enhanced, the utilization rate of the reaction gas is improved, and water logging is effectively prevented or relieved, so that the performance of the proton exchange membrane fuel cell is improved.

Description

technical field [0001] The invention belongs to the field of proton exchange membrane fuel cells, and relates to the design of the flow channel structure of the bipolar plate of the proton exchange membrane fuel cell, in particular to the gas flow channel structure which is beneficial to the output performance of the proton exchange membrane fuel cell. Background technique [0002] Proton exchange membrane fuel cells use hydrogen and oxygen as fuels to directly convert chemical energy into electrical energy, and are one of the most environmentally friendly energy conversion devices. Hydrogen and oxygen are used as the reaction gases of the proton exchange membrane fuel cell. After the hydrogen and oxygen are passed into the gas flow channel, the reaction gases diffuse to the center of the fuel cell and enter the gas diffusion layer, and then diffuse to the catalytic layer for electrochemical reaction. The gas channel of the proton exchange membrane fuel cell and the gas diff...

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Problems solved by technology

Due to the structural characteristics of the parallel flow channel, the utilization rate of the reaction gas is low, and the moisture generated by the battery is difficult to discharge in a timely and effective manner under high humidity reaction gas and high current density, so that it is easy to accumulate in the cathode flow channel and block the flow channel. Mass transfer, resulting in "water flooding" phenomenon, thus affecting the performance of fuel cells

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