Implementation of Joint Estimation of SOC Based on Extended Kalman Filter in Simscape
The energy storage industry is one of the hot industries today,in which the energy storage System plays a vital role,however,the Battery Management System(BMS)in the system is the core of the energy stor-age system,its accuracy and stability is the basis for the normal operation of the energy storage system,in order to improve its reliability,Accurate estimation of SOC is essential.In this paper,Extended Kalman Filtering(EKF)algorithm was used to estimate SOC of a single cell,and Simulink/Simscape was used to build a second-order RC cell model equivalent to 18650 lithium-ion batteries.The error of SOC obtained by discharge experi-ment is less than 2%,which proves that the algorithm has high precision.
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