一种考虑温度的锂离子电池内阻建模方法  

A Modeling Method for Internal Resistance of Li-ion Batteries Considering Temperature

作　　者：刘伟[1] 崔茂齐[1] 马力[1] 张尚玺 王旭东 LIU Wei;CUI Mao-qi;MA Li;ZHANG Shang-xi;WANG Xu-dong(Department of Mechanical and Electrical Engineering,Cangzhou Normal University,Cangzhou,Hebei 061001,China)

机构地区：[1]沧州师范学院机械与电气工程系,河北沧州061001

出　　处：《沧州师范学院学报》2023年第1期40-44,共5页Journal of Cangzhou Normal University

基　　金：沧州市重点研发计划指导项目“新能源汽车锂离子电池关键技术研究”,编号:213103007;沧州师范学院校内科研基金项目“基于关键实验和回归分析的锂离子电池参数的影响机理研究”,编号:XNJJLYB2021002;2023年度河北省高等学校科学技术研究项目“基于实验分析的影响锂离子电池参数的机理研究”,编号:ZC2023111。

摘　　要：锂离子电池的内阻是电池管理系统所需的重要参数,可以评估电池特性.由于它是关于电池荷电状态(SOC)、温度和电流的非线性函数,且难以精确建模,工程界一直在寻求一个便捷有效的模型.基于工程实验和数据处理方法,提出了一种考虑了SOC、温度、电流影响的锂离子电池内阻建模方法.首先设计典型环境温度下的电池若干组恒流工况实验,并得到相应条件下的内阻值;然后基于等效电路模型和上述数据,经数据处理解耦各个变量的耦合关系,从而得到电池内阻关于SOC、温度以及电流的一般性模型.分析和实验表明,该模型合理、简易、精度高.The internal resistance of lithium-ion batteries is an important parameter for battery management systems to evaluate battery characteristics.Since it is a nonlinear function of battery state of charge(SOC), temperature and current and difficult to accurately model, the engineering community has been seeking a convenient and effective model. Based on engineering experiments and data processing methods, this paper proposes a battery internal resistance modeling method that considers the effects of SOC, temperature and current. Firstly, several sets of constant current condition tests of battery under typical ambient temperature were designed, and the internal resistance values under corresponding conditions were obtained. Then, based on the equivalent circuit model and the above data, the coupling relationship of each variable was decoupled through data processing, so as to obtain a general model of the internal resistance of the battery about SOC, temperature and current. Analysis and experiments show that the model is reasonable, simple and accurate.

关 键 词：锂离子电池 模型 内阻 温度 SOC 

分 类 号：TM911.3[电气工程—电力电子与电力传动]