The fuel cell widely used in electric vehicles is a type of fuel cell called a proton exchange membrane fuel cell (PEMFC). It uses pure hydrogen as fuel and air as oxidant. It does not undergo a heat engine process and is not subject to thermodynamic cycles. Limitation, so the energy conversion efficiency is high, which is 2 to 3 times the thermal efficiency of ordinary internal combustion engines. At the same time, it also has the characteristics of low noise, no pollution, long life, quick start, large specific power and the output power can be adjusted at any time.