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In this paper, a scheme for estimating the state of charge (SOC) of lithium-ion batteries is proposed based on an battery equivalent circuit model. The equivalent circuit model is simplified and the model parameters are treated as unknown values here. An extended Kalman filter (EKF) is designed to online estimate the model parameters and SOC of the battery with a saturation algorithm complemented...
An automatic equivalent-circuit parameter-estimation system for a Lithium-ion battery including battery temperature controller is developed in this paper. The system consists of a thermostatic chamber and estimating programs for parameters of an internal voltage and of an internal impedance, which is expressed by two resistors and a capacitor. These resistances increases by more than 60% and above,...
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