Proton exchange membrane fuel cell

Abstract

The invention relates to a proton exchange membrane fuel cell, comprising a hydrogen supply equipment, a galvanic pile, a water / heat management system, a pressure flow rate control module and a tail gas control module, wherein the tail gas control module is used for controlling a hydrogen circulating pump to recycle hydrogen tail gas; the side of the galvanic pile is provided with an air bidirectional air intake device which uses flowing air to generate water so as to moisten and cool cells. The invention improves the moistening mode and has the advantages of high energy conversion efficiency, fast low-temperature starting, no pollution to environment, no noise and the like and is suitable for requirements of different powers.

Description

technical field [0001] The invention relates to a proton exchange membrane fuel cell, which is especially suitable for the hydrogen / empty proton exchange membrane fuel cell. Background technique [0002] Proton exchange membrane fuel cells have the advantages of high energy conversion efficiency, adaptability to different power requirements, fast start-up at low temperature, no pollution to the environment and no noise, so they can be well used in electric vehicles, submarines and mobile power sources. [0003] Proton exchange membrane fuel cell is a power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy. The working principle is actually the reverse process of electrolysis of water. Hydrogen dissociates into protons and electrons under the action of a catalyst. Protons pass through the proton exchange membrane to the cathode, and electrons pass through an external circuit to the cathode. They react with oxygen to f...

AI Technical Summary

Problems solved by technology

A decrease in water content in the membrane causes a linear decrease in its conductivity, which leads to a decrease in battery performance

This situation is more serious in the battery pack. When the membrane of a single cell in the battery pack loses water and dries up, the membrane loses the ability to conduct protons, so the dehydration area spreads to the side, and finally leads to the failure of the entire single cell.

[0005] In order to solve the problem of dehydration of the membrane in the proton exchange membrane fuel cell stack, the reaction gas is generally humidified through a humidification system. For small proton exchange membrane fuel cells, adding a humidification system will increase the complexity, volume and weight of the system

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