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In this paper we present an overview of the state-of-the-art on intelligent battery management systems for electric and hybrid electric vehicles. The focus is on mathematical principles, methods and practical implementations. The intelligent battery management systems aim at lengthening the lifetime of the battery pack and enhancing the safety of drivers of electric and hybrid electric vehicles. Three...
In this paper, dual extended Kalman filter is implemented to estimate SoC, internal resistance and capacitance of the super-capacitors applied in hybrid electric vehicles(HEVs) simultaneously based on its first-order equivalent circuit. Both simulation and experiment are carried out to verify the performance of the algorithm. Simulation results demonstrate that the algorithm reduces the estimate errors...
In order to mend the prediction of battery's SOC in hybrid electric vehicles, by analyzing varying rule of electromotive force, residual capacity and equivalent inner resistance of battery during discharge, it has been put forward that neural network model should take time based characteristics into consideration. So the model could reflect the dynamic characteristics of battery more exactly. The...
On the basis of the pulse charge and discharge characters of the nickel-metal hydrogen battery (Ni/MH) used for hybrid electric vehicle (HEV), a real-time and dynamic SOC estimated strategy of Ni/MH battery is presented in this paper. The initial SOC of the battery is determined by the historical factors and the current status together and the internal resistance of the battery is taken into account...
An adaptive algorithm for battery state of charge (SOC) estimation is presented in this paper to solve the critical issue of calculating the remaining energy of battery in hybrid electric vehicle (HEV). To obtain a more accurate SOC estimation value, both coulomb-accumulation and open-circuit voltage contributions are considered in this study. The extended Kalman filter (EKF) theory which has good...
A four state reconfigurable battery state of charge estimation algorithm combining the open circuit voltage (OCV) and its estimation and current integration is proposed in the present paper. In general, the open circuit voltage requires a few hours to become completely stabilized, when 100% confidence indicator is obtained. The proposed algorithm in its first state, works when the battery current...
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