Cathode plates, bipolar plates, fuel cell stacks, powertrains and vehicles

Abstract

The invention provides a cathode plate, a bipolar plate, a fuel cell stack, a power assembly and a vehicle. The cathode plate is arc-shaped, and a cathode gas flow field is arranged on the cathode plate, and the cathode gas flow field includes a plurality of cathode gas shunts. The cathode gas distribution channel is located on the peripheral wall of the cathode plate, the cathode gas distribution channel includes a first air inlet and a first gas outlet, a plurality of first air inlets are arranged along the axial direction of the cathode plate, and a plurality of first outlets The gas ports are arranged along the axial direction of the cathode plate. A first cooling water channel is opened on the side of the cathode plate opposite to the cathode gas flow field. The cathode plate of the fuel cell of the present invention can increase the mass transfer capacity of the reactant gas without significantly increasing the flow resistance.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a cathode plate and a bipolar plate of a fuel cell, a fuel cell stack, a power assembly and a vehicle. Background technique [0002] A fuel cell is an energy converter that directly converts the chemical energy of "fuel gas" into direct current electrical energy. Under the current severe energy and environmental situation, hydrogen energy, as a high-quality, efficient and clean energy material, has gradually attracted people's attention. At the same time, fuel cells, as one of the important forms of hydrogen energy utilization, have also attracted the pouring of many scientific research and industrial forces. In the case of a hydrogen-oxygen fuel cell, the products are water and heat. The core components contained inside the fuel cell include membrane electrodes and plates. During the working process, the membrane electrode should maintain a certain water content, so that t...

AI Technical Summary

Problems solved by technology

In the existing fuel cell configuration, the mass transfer capacity of the reaction gas is generally poor in the channel with better flow rate, which easily causes concentration polarization on the electrode; and by increasing the geometric complexity of the reaction gas channel (such as increasing The method of increasing the mass transfer capacity of the turbulence structure) significantly increases the flow resistance, often resulting in a large flow pressure drop, which is very likely to outweigh the gain, resulting in a decrease in the net output power of the fuel cell

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