基于SOC的锂电池组能量均衡控制策略研究  

Research on energy balancing control strategy of lithium battery pack based on SOC

作　　者：刘胜永 于跃[1] 罗文广 黄俊华 周晓华[1] LIU Sheng-yong;YU Yue;LUO Wen-guang;HUANG Jun-hua;ZHOU Xiao-hua(School of Electrical and Information Engineering, Guangxi University of Science and Technology, Liuzhou Guangxi 545006, China;Guangxi Key Laboratory of Automotive Parts and Vehicle Technology, Guangxi University of Science and Technology, Liuzhou Guangxi 545006, China;Liuzbou Teld New Energy Co., Ltd., Liuzhou Guangxi 545006, China)

机构地区：[1]广西科技大学电气与信息工程学院,广西柳州545006 [2]广西科技大学广西汽车零部件与整车技术重点实验室,广西柳州545006 [3]柳州特来电能源有限公司,广西柳州545006

出　　处：《电源技术》2017年第12期1712-1714,1717,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金(61563006);广西科技攻关项目(桂科攻1598008-2);广西高校科研项目(KY2015YB165);广西重点实验室建设项目(14-045-44;14-A-02-05);广西汽车零部件与整车技术重点实验室开放基金重点项目(2014KFZD01);广西研究生教育创新计划项目(YCSZ2014199)

摘　　要：针对电池制造工艺和使用环境不同所引起的电池单体间荷电状态(SOC)不均衡问题,提出了一种锂电池组主动均衡控制策略。在以无迹卡尔曼滤波(UKF)算法准确估算锂电池SOC的前提下,以电感为储能元件,通过模糊-PI算法调制MOSFET的占空比(PWM)进而实现均衡电流的优化控制,使能量直接由电池组中的SOC最高的单体电池转移至SOC最低的单体电池。在预设的实际工况下,通过以上分析建立系统均衡控制实验平台。实验结果证明该系统均衡速度和效率都优于传统的PI控制系统。The operation environment and manufacturing process cause the problem of state of charge(SOC)imbalance for cells.In order to solve the problem,the active balancing control strategy of lithium battery was proposed.Based on the accurate estimation of lithium battery SOC through unscented Kalman filter(UKF),with inductance as storage energy,the pulse width of MOSFET was modulated through fuzzy-PI algorithm to achieve the optimal control of balancing current,so energy is directly transferred from the unit with the highest SOC to the unit with the lowest SOC.Under the actual working conditions,the experiment platform was established based on the above analysis.The results show that the systemis better than the traditional PI control system.

关 键 词：锂电池组 荷电状态 主动均衡 模糊-PI控制 

分 类 号：TM912[电气工程—电力电子与电力传动]