RC equivalent circuit model of lumped parameters for lithium ion batteries in electric vehicles

This article studied the RC equivalent circuit model of lumped parameters for lithium-ion batteries in electric vehicles. On the base of the traditional battery models, this research creates a new dynamic equivalent circuit model of lithium-ion power battery considering the polarization effect and hysteresis voltage characteristics of battery. Model's parameters were identified by tests. The estimated error of this model is 2% through experimental analysis, which is more accurate than the traditional first-order and second-order models and simpler than the third-order RC model.