Humidifier system for fuel cell engine and humidifying method

Abstract

The invention provides a humidifier system for a fuel cell engine and a humidifying method, a high-pressure nozzle (13) is arranged in a humidifier (7), a dry side gas flow channel (14) and a wet side gas flow channel (15) are arranged below the high-pressure nozzle (13), and a one-way valve (10) is arranged in the wet side gas flow channel (15); a filter (1), an air compressor (2) and an intercooler (3) are sequentially connected in the inlet direction of a humidifier (7), an electric pile (8) is arranged in the outlet direction of the humidifier (7), and a condenser (9) is arranged in the backflow direction of the humidifier (7); and the system further comprises a control module and an adjusting module. The humidifying requirement of the fuel cell vehicle under multiple working conditions can be met, the humidity of the galvanic pile under the dynamic working condition is adjusted, the problems of water logging and over-dryness of the galvanic pile under two extreme conditions are effectively solved, heat in liquid water at an outlet of the intercooler is recycled, the additional liquid water storage volume is reduced, and reutilization of the air at the outlet of the electric pile is realized.

Description

technical field [0001] The invention belongs to the technical field of humidifiers for proton exchange membrane fuel cell engines, and in particular relates to a humidifier system and a humidification method for fuel cell engines. Background technique [0002] A proton exchange membrane fuel cell vehicle is a new energy vehicle that converts chemical energy into electrical energy during work to provide power for the vehicle. [0003] The fuel cell engine needs proper humidity to work, and the proton exchange membrane inside the fuel cell stack needs water to maintain the proton conductivity, so the gas entering the stack needs to be humidified. When the proton exchange membrane is under proper humidity conditions, it will have higher ion conductivity, lower battery internal resistance, higher fuel cell output voltage and thus higher load capacity. If the inside of the stack is too dry, the internal resistance of the stack will increase, the ohmic loss will increase, the out...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a humidifier system and humidification method for a fuel cell engine, which solves the problem that the fuel cell engine using a membrane humidifier cannot increase the inlet air during the start-up phase or when restarting after a short stop. The problem of wetness, and when the power demand of the car suddenly increases, the amount of water generated by the cathode of the stack cannot meet the humidification demand of the inlet air or the problem that the stack may be flooded when the power demand suddenly decreases, so as to avoid the fuel cell stack from being too dry, and Can alleviate the flooding of the stack

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