The Optimal Charging Method Research for Lithium-ion Batteries Used in Electric Vehicles

This paper aimed to propose a novel charging method for the lithium-ion batteries with negative pulse charging theory. Firstly the second order Thevenin model was built to determine the internal parameters of the battery. On the foundation of the internal parameters, this paper analysed the characteristics of polarization voltage. And then the charging method was studied according to the change regulation of the internal polarization voltage. Finally the experiment result showed feasibility of this charging method.