Online estimation of model parameters and state-of-charge of LiFePO4 batteries in electric vehicles

► An online estimation of the model parameters like OCV for a LiFePO4 battery is built. ► The estimation relies merely on the real-time terminal voltages and load currents. ► The SoC is accurately estimated according to the relationship table of OCV-SoC. ► The proposed estimation is verified experimentally to be accurate and robust enough. ► Large-memory and high-quality CPU for the battery management system are avoided.