Radial flow field structure of fuel cell

Abstract

The invention discloses a radial flow field structure of a fuel cell, and relates to the technical field of fuel cells, the radial flow field structure comprises a polar plate, an air inlet and an annular flow field, the annular flow field comprises a plurality of flow field areas which are annularly distributed from inside to outside, and each flow field area is internally provided with a plurality of radial flow channels which are distributed at equal angles; each radial flow channel extends along the radial direction of the polar plate, the junction of every two flow field areas is provided with a shunting flow channel extending along a joint arc line, the flow field area on the inner side of each shunting flow channel is provided with a corresponding radial flow channel communicated with the shunting flow channel, and the communication point of the radial flow channel and the shunting flow channel is positioned in the middle of the shunting flow channel; a plurality of corresponding radial flow channels are arranged in a flow field area on the outer side of each flow dividing flow channel and communicated with the flow dividing flow channel, and communication points of the radial flow channels and the flow dividing flow channels are evenly distributed in the extending direction of the flow dividing flow channels. The service life of the fuel cell is prolonged.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a radial flow field structure of a fuel cell. Background technique [0002] The bipolar plates of the components of the fuel cell are equipped with a flow field structure for the circulation of hydrogen and oxygen, so that the hydrogen and oxygen enter the interior of the fuel cell and are evenly distributed, and then react under the action of the catalytic membrane to generate electricity. [0003] The Chinese invention patent publication number CN111370726A discloses a fuel cell radial flow field structure, which promotes the full diffusion of the reaction gas in the flow field, improves the diffusion and mass transfer efficiency of the reaction gas, improves the output efficiency of the cell, and simultaneously reacts The gas diffuses evenly around through the flow channel holes, which ensures the uniform distribution of the gas in the flow field and avoids the occurrence o...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a fuel cell stack with adjustable force on the end plate, to solve the problem that the force on each point between the bipolar plates in the fuel cell in the prior art is not equal, and it is impossible to control the fuel cell inside during use. Technical Problems in Adjusting Assembly Force

Images