Bipolar plate of proton exchange membrane fuel cell with uniform thermal conductivity

Abstract

The invention belongs to the technical field of fuel cells, in particular to a bipolar plate of a proton exchange membrane fuel cell with uniform thermal conductivity. The bipolar plate comprises a diffusion layer and a catalytic layer, wherein opposite surfaces of the diffusion layer and the catalytic layer are fixedly connected through phase change heat conduction insulating tubes that are distributed in a rectangular array between the diffusion layer and the catalytic layer, the central outer surfaces of the phase change heat conduction insulating tubes are fixedly sleeved with proton exchange membranes that are located between the diffusion layer and the catalytic layer, and reverse surfaces of the diffusion layer and the catalytic layer are fixedly mounted with positioning frames. Thebipolar plate of the proton exchange membrane fuel cell with uniform heat conduction, by fixedly connecting the opposite surfaces of the diffusion layer and the catalytic layer through the phase change heat conduction insulating tubes, achieves the effect of guiding and conducting the heat inside the diffusion layer and the catalytic layer and prevents the accumulation of heat in the diffusion layer and the catalytic layer from adversely affecting the battery, thereby solving the technical problem of low thermal conductivity of the existing fuel cell.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a proton exchange membrane fuel cell bipolar plate with uniform heat conduction. Background technique [0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator. It is the fourth power generation technology after hydropower, thermal power and atomic power. Since the fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electrical energy through an electrochemical reaction, it is not limited by the Carnot cycle effect, so the efficiency is high; in addition, the fuel cell uses fuel and oxygen as raw materials; at the same time There are no mechanical transmission parts, so there is no noise pollution, and the emission of harmful gases is very small. It can be seen that from the point of view of saving energy and protecting the ecological environment,...

AI Technical Summary

Problems solved by technology

[0003] At present, the flow channels used by fuel cells in heat conduction are mainly divided into single serpentine flow channels, multi-serpentine flow channels, interdigitated flow channels, and bionic fractal heterogeneous flow channels. In bionic fractal heterogeneous flow channels, the The fluid flows in the "smooth" pipeline, thereby reducing the pressure drop of the fluid and maximizing the uniform distribution of the fluid in the branch, but the heat recovery rate of the water in the diffusion layer in the bipolar plate when it is discharged The main reason is that if the recovery passes through the flow channel, the thermal conductivity is low, and it is easy to hinder the circulation of the reaction gas, affecting the power generation performance, and the conductive material used in the electrode plate is heavy, which is easy to increase the weight of the entire battery

Images