Pressure compensation device of hydrogen fuel cell

一种氢燃料电池的补压装置

Abstract

The invention relates to the field of fuel cells, especially relates to a pressure compensation device of a hydrogen fuel cell, and specifically provides equipment for providing an auxiliary homogenous pressure for the hydrogen fuel cell used in the field of new energy automobiles. The equipment comprises a shell, a pressure compensation cavity and a pressure regulation cavity communicating with each other are arranged in the shell, liquid submerges the communication site of the pressure compensation cavity and the pressure regulation cavity, so that the gas parts of the pressure compensation cavity and the pressure regulation cavity are isolated, and the liquid parts are communicated; the pressure compensation cavity is used for communicating with the fuel cell, and the pressure regulation cavity is used for communicating with the exterior of the shell; and in use, the pressure compensation cavity and the pressure regulation cavity have a liquid level difference, and air is stored in the pressure compensation cavity, and in the case of under-pressure of an air supply source of the fuel cell, the pressure compensation cavity supplements air into the fuel cell under the action of the liquid level difference. In the structure, in the case of pressure fluctuation of the air supply source, the air pressure can be conveniently judged through the change of the pressure difference by means of the mobility of liquid, and in addition, the air in the pressure compensation cavity can be supplemented into the fuel cell in real time so as to guarantee the balance of the air pressure inside the fuel cell.
本发明涉及燃料电池领域,尤其是一种氢燃料电池的补压装置,具体为新能源汽车领域使用的燃料电池提供辅助均压的设备,包括壳体,壳体内具有相互连通的补压腔及调压腔,液体淹没补压腔与调压腔的连通处,使补压腔和调压腔的气体部分隔离、液体部分连通;补压腔用于连通燃料电池,调压腔连通壳体外部;使用时补压腔与调压腔呈现液位差并在补压腔中储气,燃料电池的供气源欠压时,补压腔在液位差作用下向燃料电池补气。该结构中,利用液体的流动性,在补压腔与调压腔之间形成压差,以便于观察压力的大小,同时在形成压差的区域存储燃气或空气,供气源压力波动时,通过压差变化方便于气压判断,此外,补压腔中的气体能够实时的补充到燃料电池中,保证燃料电池内气压的均衡。

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