基于电池内阻的锂电池自适应充电策略  

Lithium battery adaptive charging strategy based on battery resistance

作　　者：吴逸飞 专祥涛[1,2] 黄柯 WU Yifei;ZHUAN Xiangtao;HUANG Ke(School of Electrical Engineering and Automation,Wuhan University,Wuhan Hubei 430072,China;Shenzhen Research Institute,Wuhan University,Shenzhen Guangdong 518057,China)

机构地区：[1]武汉大学电气与自动化学院,湖北武汉430072 [2]武汉大学深圳研究院,广东深圳518057

出　　处：《电源技术》2022年第1期54-58,共5页Chinese Journal of Power Sources

摘　　要：针对锂离子电池提出了一种自适应充电策略,该策略可以减少锂离子电池充电过程中的能量损耗,并且能够应用于各个充电区间。对锂离子电池的充电过程和能量损耗进行了建模。构建以最小充电损耗为目标的优化问题,利用拉格朗日乘数法将其转化为无约束优化问题求解。根据得到的最优充电电流曲线和电池内阻的关系,提出一种基于电池内阻的自适应充电策略。通过仿真实验验证,该方法可以应用于各个充电区间,与传统恒流充电方法相比,能够有效降低电池的充电损耗。In this paper,an adaptive charging strategy for lithium ion batteries is proposed which can reduce the energy loss in the charging process of lithium ion battery,and can be applied to all charging stages.First,this paper models the charging process and energy loss of the battery.Then,the optimization problem with the minimum charging loss as the objective is constructed and transformed into an unconstrained optimization problem by Lagrange multiplier method.According to the relationship between the optimal charging current curve and the internal resistance of the battery,an adaptive charging strategy based on the internal resistance of the battery is proposed.Finally,the experimental results show that this method can be applied to each charging stage,and compared with the traditional constant current charging method,it can effectively reduce the battery charging loss.

关 键 词：锂离子电池 充电 电阻 能量损耗 

分 类 号：TM912[电气工程—电力电子与电力传动]