H_∞观测器在车用电池SOC估计中的应用研究  

Application of H_∞ observer on SOC estimation of lithium-ion batteries in electric vehicles

作　　者：刘舒[1] 时珊珊[1] 李雪[2] 张彩萍[2] 高洋[2] 

机构地区：[1]国网上海市电力公司电力科学研究院,上海200437 [2]北京交通大学国家能源主动配电网技术研究中心,北京100044

出　　处：《电源技术》2016年第8期1570-1574,共5页Chinese Journal of Power Sources

基　　金：国网上海市电力公司科技项目资助(52094013502P)

摘　　要：电池荷电状态(state of charge,SOC)的准确估计是电动车安全运行的重要保证。为了准确估计电池的SOC,将观测器的设计原理应用到电池的等效电路模型中,设计了H_∞观测器。以实际容量为90 Ah的新电池为研究对象,在Matlab/Simulink中建立仿真模型实现观测器的计算过程。当新电池运行在DST工况,设定不同仿真初值时,SOC的估计误差绝对值在2%以内,说明H_∞观测器不依赖仿真初始值的选择;分析了SOC-OCV曲线对SOC估计精度的影响,得出在SOC估计精度要求很高时,及时更新SOC-OCV曲线是有必要的。The accurate estimation of the state-of-charge （SOC） of battery is the basic premise for the effective energy management and the important guarantee for safe and efficient operation for electric vehicles To accurately estimate SOC, an H∞ observer was designed by combining theory of observer with the equivalent circuit model of the battery A model was built with a new battery of 90 Ah as research object in Matlab/Simulink When the new battery works on dynamic stress test and different simulation initial SOC, the error keeps bellow 2%, proving that H. observer does not depend on initial ,SOC The accuracy of H∞ observer depends on the accuracy of the curve of SOC-OCV

关 键 词：电动车 锂离子电池 SOC估计 H∞观测器 

分 类 号：TM912[电气工程—电力电子与电力传动]