Bipolar plate of proton exchange membrane fuel cell

Abstract

The invention provides a bipolar plate of a proton exchange membrane fuel cell. The bipolar plate of the proton exchange membrane fuel cell is formed by combining a positive pole single plate and a negative pole single plate; a positive pole flow field is arranged on the outer side of the positive pole single plate; a negative pole flow field is arranged on the outer side of the negative pole single plate; and a coolant flow field is formed by a cavity between the positive pole single plate and the negative pole single plate. A positive pole inlet and a positive pole outlet are formed in the left and right sides of the bipolar plate of the proton exchange membrane fuel cell, and a negative pole inlet and a negative pole outlet are formed in the left and right sides of the bipolar plate ofthe proton exchange membrane fuel cell; a coolant inlet and a coolant outlet are formed in the upper and lower sides of the bipolar plate of the proton exchange membrane fuel cell; and the positive pole inlet and the negative pole inlet are formed in the left and right sides of the polar plate of the proton exchange membrane fuel cell. Vertical cross flow of a coolant and negative pole gas and positive pole gas is realized, and then the electrochemical reaction activity of the bipolar plate of the proton exchange membrane fuel cell is improved, and preferable heat management is realized.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a bipolar plate of a proton exchange membrane fuel cell. Background technique [0002] A fuel cell is a chemical battery that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator; it is the fourth power generation technology following 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 and has high economic efficiency. [0003] Due to the limitations of various technologies and considering the energy consumption of the entire device system, the total conversion efficiency of various fuel cells currently in operation is mostly in the range of 45%-60%, and can reach more than 80% if considering the utilization of exhaust heat. In addition,...

AI Technical Summary

Problems solved by technology

If the gas distribution is inconsistent, the actual performance of each point of the membrane electrode will be quite different, and the heat generation of each point of the membrane electrode will be inconsistent. In severe cases, it will cause local overheating in the membrane electrode, or even burn through the proton exchange membrane; When the water generated during the operation of the fuel cell cannot be removed in time, the liquid water will block the flow channel, which will cause the gas flow channel to be blocked and cannot be evenly distributed

Images