Fuel cell system

Abstract

The invention relates to the field of fuel cells, in particular to a fuel cell system which comprises an electric pile and an air system, the air system comprises an air inlet system and an air exhaust system; the air inlet system comprises a main air inlet pipeline connected with the electric pile; the air exhaust system comprises a main air outlet pipeline connected with the electric pile; the air system further comprises a humidifying system. The humidifying system comprises a mixing box connected to the main air inlet pipeline. The main gas outlet pipeline is connected with a water supply mechanism for supplying water into the mixing box and a tail discharge mixing pipe through a gas-water separator; water liquid obtained after gas-water separation of discharged air can be used for wetting air, and the humidity state of follow-up inlet air is guaranteed; meanwhile, the water pump is driven by potential energy of air discharged by the gas-water separator, so that the water supply operation of the water supply component into the mixing box is controlled, and the air inlet humidity of the fuel cell stack is ensured under the condition that extra power consumption is not increased.

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