An Equivalent Circuit Model for Tractive Super-Capacitor

State of charge of the energy storage in electric vehicle is no doubt a very important parameter. The equivalent circuit model for tractive super-capacitor is analyzed which is used in predicting the state of charge of tractive super-capacitor. The three-class T style RC equivalent circuit model is built based on the characteristic of pulse charging and discharging in the range of working voltage, and the calculation method of model parameters are shown in detailed. Comparison between simulation and experimental curves show that the fitting accuracy of the super-capacitor equivalent circuit model is satisfied in pulse charging and discharging.