基于稳态开路电压的锂离子电池使用程度估算  

SOU estimation for Li-ion battery based on steady-state open circuit voltage

作　　者：靳博文 潘天红 陈山[1] JIN Bo-wen;PAN Tian-hong;CHEN Shan(Electrical and Information Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;Electrical Engineering and Automation,Anhui University,Hefei,Anhui 230601,China)

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013 [2]安徽大学电气工程与自动化学院,安徽合肥230601

出　　处：《电池》2019年第6期473-476,共4页Battery Bimonthly

基　　金：国家自然科学基金项目(51477070);镇江市重点研发项目(GY2015037)

摘　　要：采用使用程度(SOU)描述锂离子电池的状态,恒流放电法辨识放电过程中欧姆内阻随开路电压的变化关系,以及极化电压随放电强度与开路电压的变化关系。修正锂离子电池的端电压,得到估计的稳态开路电压;利用估计的稳态开路电压,实时计算电池的SOU。在变流放电的工况下,采用SOU描述电池的状态效果优于荷电状态(SOC),最大误差为5.15%,最小误差为0.75%,基本满足精度要求。The state of Li-ion battery was described by the state of use( SOU). The galvanostatic discharge method was used to identify the relationship between Ohmic internal resistance and open circuit voltage during discharge,the relationship between polarization voltage with discharge intensity and open circuit voltage. The corrected terminal voltage of the Li-ion battery was used to obtain the estimated steady-state open circuit voltage;the calculated SOU of the battery in real time was used to estimate steady-state open circuit voltage. Under the condition of variable current discharge,SOU was used to describe the state of the battery,which was better than SOC( state of charge),the maximum error was 5. 15%,the minimum error was 0. 75%,which basically met the accuracy requirement.

关 键 词：锂离子电池 使用程度(SOU) 极化电压 欧姆内阻 稳态开路电压 放电倍率 

分 类 号：TM912.9[电气工程—电力电子与电力传动]