Self-generated nitrogen blowing and cleaning system for protective fuel battery car engine

Abstract

This invention relates to an automatic nidrogen-generating sweeping system including a fuel cell, its air-supply system, a hydrogen-supply system and an air deoxidation tank connected with the hydrogen supply system, the air supply system and the fuel cell, which is advantaged that when the cell stops working, the residual hydrogen in the hydrogen chamber of a fuel cell stack is replaced by nitrogen so as to prevent corrosion to the cell and increase its life and realize preparing nidrogen on-line and automatic sweeping and utilizes tail hydrogen of a cell to re-generate deoxidizer in the air tank to use energy effectively.

Description

technical field [0001] The invention relates to a proton exchange membrane fuel cell, in particular to a purging system for the proton exchange membrane fuel cell. Background technique [0002] Proton exchange membrane fuel cells used in automobiles often have unsteady operations such as starting and stopping. This unsteady operation makes the proton exchange membrane fuel cells used in automobiles often stop working. When the fuel cell stops working, the battery The anode gas chamber is filled with pure hydrogen, the cathode gas chamber is filled with air, and the external circuit of the battery has been disconnected. At this time, the fuel cell has no normal electrochemical reaction. However, at this time, the hydrogen in the anode gas chamber will slowly diffuse to the cathode through the membrane under the action of the concentration difference. On the other hand, the air in the cathode gas chamber will also enter the anode gas chamber through the exhaust port and the me...

AI Technical Summary

Problems solved by technology

The deficiency of the prior art is: the nitrogen gas source on the ground or on the vehicle needs to frequently replace the nitrogen cylinder or fill the nitrogen cylinder with nitrogen, which is very inconvenient to use

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