System and method for controlling water content inside fuel cell

Abstract

The invention provides a water content control system and method inside a fuel cell. The system includes a water volume detection system installed at both ends of the fuel cell stack for detecting the water content of the proton membrane in the fuel cell stack, wherein the water volume detection system The system includes an ultrasonic generator and an ultrasonic receiver, and the controller is connected to the water quantity detection system for adjusting the gas supply of the fuel cell intake and exhaust system according to the water content of the proton membrane received from the water quantity detection system. The water content detection system detects the water content inside the fuel cell. According to the internal water content, the water content of the proton membrane can be calculated. The controller adjusts the gas supply of the fuel cell intake and exhaust system according to the water content of the proton membrane. The invention solves the problems in the prior art that the power generation power of the fuel cell decreases and the service life of the proton membrane decreases due to the non-uniform water content of the proton membrane when the fuel cell is in use.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a system and method for controlling water content inside a fuel cell. Background technique [0002] When the hydrogen fuel cell is working, hydrogen and oxygen in the air will produce water in the electrochemical process, and part of the water will wet the proton membrane. The proton membrane can increase the power generation efficiency in a wet state, so that the stack generates electricity, and part of the water will be with the The flow of hydrogen or air exits the stack. [0003] Therefore, it is necessary to detect and control the water content of the proton membrane in the fuel cell stack. This part of water is the water produced after the electrochemical reaction of the stack. The atomized state is stored in the hydrogen channel and air channel of the stack, and finally discharged through the water channel. The proton membrane in the stack needs water to improve the catalytic a...

AI Technical Summary

Problems solved by technology

[0004] In view of this, an embodiment of the present invention provides a fuel cell internal water content control system and method to solve the problem of fuel cell power generation decline and proton membrane failure caused by the uneven water content of the proton membrane in the prior art when the fuel cell is in use. The problem of reduced service life

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