A Multistage Current Charging Method for Li-Ion Battery Considering Balance of Internal Consumption and Charging Speed
Liu Wei1, Wu Haisang2, He Zhichao2, Sun Xiaofeng3, Yang Geng2
1.College of Mechanical and Electrical Engineering Cangzhou Normal University Cangzhou 061001 China; 2.Department of Automation Tsinghua University Beijing 100084 China; 3.Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province Yanshan University Qinhuangdao 066004 China
Abstract：A fast charging method should make a balance between battery's safety/cycle life and charging time. For that the battery's temperature or energy loss should be controlled in the method. This paper proposed a charging method of Li-ion battery to balancing internal consumption and charging speed. Firstly, based on the constant current charging voltage curves of the Li-ion battery, the method gave a procedure to get the relationship of the internal resistances with stage of charge (SOC) and charge currents. Then the energy loss function was simplified and an objective function was designed for balancing charging time and the loss. Finally, for real time implementation, a multistage current charging curve is designed with different balance weight factors in each stage. Experiment shows the advantages.
刘伟, 吴海桑, 何志超, 孙孝峰, 杨耕. 一种均衡考虑锂电池内部能量损耗和充电速度的多段恒流充电方法[J]. 电工技术学报, 2017, 32(9): 112-120.
Liu Wei, Wu Haisang, He Zhichao, Sun Xiaofeng, Yang Geng. A Multistage Current Charging Method for Li-Ion Battery Considering Balance of Internal Consumption and Charging Speed. Transactions of China Electrotechnical Society, 2017, 32(9): 112-120.
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2017, Vol. 32 
