Method and system for evaluating performance degradation of fuel cell system on whole vehicle level

The invention belongs to the technical field of fuel cell performance evaluation, and provides a whole vehicle level fuel cell system performance degradation evaluation method and system. The shutdown frequency, the sudden stop frequency, the cold start frequency, the whole vehicle hydrogen-electricity mode operation time, the whole vehicle non-hydrogen-electricity mode operation time, the time corresponding to the power of the fuel cell system in the preset interval, the power variable load frequency and the cold start frequency in different temperature intervals are comprehensively considered; summing the evaluation attenuation amount corresponding to each frequency to obtain a frequency evaluation attenuation amount; summing the evaluation attenuation corresponding to each time to obtain a time evaluation attenuation; summing the frequency evaluation attenuation amount and the time evaluation attenuation amount to obtain a comprehensive attenuation amount; the performance attenuation evaluation of the fuel