Fish scale bionic fuel cell bipolar plate and fuel cell

Abstract

The invention discloses a scale bionic fuel cell bipolar plate and a fuel cell, the fuel cell bipolar plate comprises a bipolar plate body, the bipolar plate body is internally provided with a cavity,one end of the bipolar plate body is provided with a gas inlet, the other end of the bipolar plate body is provided with a gas outlet, and the bipolar plate body is internally provided with a plurality of rhombic rib structures; the rhombus rib structures and the cavity form a net-shaped flow channel, and the gas branch inlet and the gas branch outlet are communicated through the net-shaped flowchannel; and every two adjacent rows of rhombus rib structures are arranged in a staggered mode. The obtuse angle of the rhombic rib structures is set as a circular bead, and the meshy air inlet flowchannel with scaly distribution is arranged, so that the turbulence degree of the gas in the flowing process is enhanced, and the reaction gas can more effectively reach the membrane electrode throughthe diffusion layer; namely, under the condition of the same output power density, the net output of the flow field is higher, so that the reaction gas can reach the membrane electrode more effectively through the diffusion layer, and under the condition of the same output power density, the net output of the flow field is higher.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fish scale bionic fuel cell bipolar plate and a fuel cell. Background technique [0002] The energy crisis has become a common problem faced by all mankind. In addition, with the increasing pollution of the environment by fossil energy, governments, enterprises and researchers in various countries attach great importance to the development and utilization of new energy. Due to its many advantages, hydrogen-oxygen proton exchange membrane fuel cells have great potential to replace traditional power devices and have broad application prospects. The flow field is processed on the bipolar plate. The excellent flow field structure can improve the flow state of the reactant gas, enable the gas to react more and more uniformly and remove water in time. Drainage has a major impact. In addition, the cost of the bipolar plate accounts for about 1 / 4 of the total cost of the ignition ...

AI Technical Summary

Problems solved by technology

Its advantage is that the reaction gas is forced to pass through the diffusion layer of the electrode, the mass transfer capacity of the diffusion layer is enhanced, and the water in the diffusion layer is discharged in time, but the pressure drop is very large, and the excessive water taken will also increase the difficulty of humidification

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