A fuel cell bipolar plate with imitation lung multilayer structure and its realization method

Abstract

The invention discloses a fuel cell bipolar plate with an imitation lung multilayer structure and a realization method thereof. The present invention adopts the lung imitation multi-layer structure bipolar plate design, including gas distribution layer, directional blowing layer and drainage layer; the reaction gas enters the gas distribution layer through the air inlet pump, and conducts the gas step by step through the four-stage gas transmission unit. Make the gas enter the gas diffusion layer evenly and with the largest area to participate in the battery reaction, and enhance the uniformity of mass transfer; The mass component compresses the gas into the gas diffusion layer to participate in the electrochemical reaction inside the battery, and the drainage component purges the accumulated water inside the channel. Combined with the designed rectangular flow channel and the inclined bottom surface with an inclination angle β at the bottom of the flow channel, the The discharge of the generated water avoids the blockage of the droplets inside the battery, comprehensively improves the performance of the fuel cell in terms of uniform mass transfer and rapid drainage, and thus improves the overall performance of the fuel cell.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell bipolar plate with a lung-imitating multilayer structure and a realization method thereof. Background technique [0002] The proton exchange membrane fuel cell is a fast start-up time, light weight, clean, environmentally friendly and efficient energy conversion device. It uses hydrogen as fuel and directly converts the chemical energy in hydrogen into electrical energy under the action of the catalytic layer catalyst and proton exchange membrane. Generate working current, the power generation efficiency can be as high as 60% and is not limited by the Carnot cycle. The electrochemical reaction product inside the battery is only water, which greatly solves the problems of environmental pollution and energy shortage. A proton exchange membrane fuel cell consists of multiple single stacks in series. Its single structure mainly includes a gas diffusion layer, a gas catalytic lay...

AI Technical Summary

Problems solved by technology

If the mass transfer is uneven, the local current density distribution of the battery will be poor; if the product water is not removed in time, a "water flooding phenomenon" will occur inside the battery, resulting in local overheating. Both of the above will reduce the output performance of the battery. shorten battery life

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