All-vanadium redox flow battery equivalent circuit model parameter identification method

The invention relates to an all-vanadium redox flow battery equivalent circuit model parameter identification method, comprising the following steps: collecting open-circuit voltage, terminal voltageand current of the all-vanadium redox flow battery; obtaining an input sequence and an output sequence; calculating to obtain an information vector; calculating an initial value of a covariance matrixat a starting moment and an initial value of an observed value of the identification parameter vector; introducing a time-varying forgetting factor; calculating a gain vector and a covariance matrix;calculating an observation value of the identification parameter vector at the current time; calculating the value of an identification parameter in the identification parameter vector; and calculating to obtain equivalent circuit model parameters of the all-vanadium redox flow battery. The all-vanadium redox flow battery equivalent circuit model parameter identification method is suitable for nonlinear system parameter id