An Inner Resistance Adaptive Model Based on Equivalent Circuit of Lithium-ion Batteries

Abstract:

Based on the present battery models,a novel non-linear battery model based on equivalent circuit was proposed.Furthermore,a method using Kalman filter to identify the inner resistance of the battery was studied which led to a resistance adaptive battery model.Two experiments, in which the battery underwent different current cycles and different temperatures, were implemented to test the battery model.Results show that the model proposed can describe the dynamic characteristics of the battery pack very well even when the battery pack varies caused by current,state of charge (SOC) and temperature etc.

Key words:resistance adaptive; power lithium-ion battery; equiualent circuit based model; Kalman filter