The invention provides a shutdown purging method and device of a fuel
cell system and an electronic medium. An
air compressor in the fuel
cell system is an
energy recovery type
air compressor; the method comprises the following steps: when the fuel
cell system enters a shutdown purging state, acquiring a real-time
air compressor rotating speed of an air compressor; matching
processing is conducted on the real-time air compressor rotating speed on the basis of preset purging data, and a target corresponding relation corresponding to the real-time air compressor rotating speed is obtained; the preset purging data represents a corresponding relation between different opening degrees of the regulating valve and the
recovery power of the air compressor under different rotating speeds of the air compressor; adjusting
valve opening processing is conducted on the real-time air compressor rotating speed according to the target corresponding relation, and the target adjusting
valve opening is obtained; and the regulating valve is controlled according to the target regulating
valve opening degree, so that the air compressor reaches the target
recovery power in the shutdown purging process, the problem of high
power consumption of the air compressor in the purging process of an existing fuel
cell system is solved, and the system efficiency of the fuel
cell system in the purging process is improved.