Fuel cell system suitable for high-altitude unmanned aerial vehicle and control method thereof

The invention relates to a fuel cell, in particular to a fuel cell system suitable for a high-altitude unmanned aerial vehicle and a control method thereof.The fuel cell system comprises a controller, an air flow channel and a fuel cell system body arranged in the air flow channel; the fuel cell system comprises a fuel cell stack, a gas mixing chamber, an oxygen generator, a water storage tank, a condensate water separator, a hydrogen cylinder and an air inlet; the air inlet and the oxygen generator are connected with the gas mixing chamber through gas pipelines, the gas mixing chamber and the hydrogen cylinder are connected with the fuel cell stack through gas pipelines, the fuel cell stack is connected with the condensate water separator through a gas pipeline, and a gas outlet of the condensate water separator is connected with the gas mixing chamber through a gas pipeline. A liquid outlet of the condensate water separator is connected with the water storage tank; the water storage tank is connected with t