Аннотация
In this research study, a Thevenin equivalent circuit model (ECM) has been proposed for the Lithium-ion polymer battery (LiPo). Modeling the LiPo battery is essential to estimate (state of charge) SOC in the battery management system (BMS). Three RC parallel networks’ parameters have been analytically found based on analyzing voltage relaxations after each applied current pulse. The coulomb counting algorithm is utilized for SOC estimation of the battery. The simulation results of terminal voltage under constant 2C current rate and pulsed current discharge are in good agreement with experimental data obtained.