Fuel cell electrochemical impedance spectroscopy equivalent circuit parameter fitting method

A fuel cell electrochemical impedance spectroscopy equivalent circuit parameter fitting method comprises the following steps: measuring fuel cell electrochemical workstation test condition information and electrochemical impedance spectroscopy measurement data; the method comprises the following steps: constructing a fuel cell equivalent circuit model representing a fuel cell as a series of combinations of resistance, inductance and capacitance, constructing a fitting frequency set and a fitting sample, and establishing a fitting frequency set fL based on fitting tendencies to different frequencies; according to electrochemical impedance spectroscopy measurement data, a fitting sample related to a fitting frequency set fL is constructed through an interpolation method, a parameter range of equivalent circuit parameters is determined according to test working condition information, a single-target optimization model is constructed, a circuit parameter combination meeting the target function minimization in a p