文章摘要
孙国强,任佳琦,成乐祥,等.基于分数阶阻抗模型的磷酸铁锂电池荷电状态估计[J].电力系统自动化,2018,42(23):57-63. DOI: 10.7500/AEPS20180317003.
SUN Guoqiang,REN Jiaqi,CHENG Lexiang, et al.State of Charge Estimation of LiFePO4 Battery Based on Fractional-order Impedance Model[J].Automation of Electric Power Systems,2018,42(23):57-63. DOI: 10.7500/AEPS20180317003.
基于分数阶阻抗模型的磷酸铁锂电池荷电状态估计
State of Charge Estimation of LiFePO4 Battery Based on Fractional-order Impedance Model
DOI:10.7500/AEPS20180317003
关键词: 锂离子电池  荷电状态估计  分数阶阻抗模型  分数阶迹卡尔曼滤波
KeyWords: lithium-ion battery  state of charge(SOC)estimation  fractional-order impedance model  fractional-order unscented Kalman filter(FUKF)
上网日期:2018-10-09
基金项目:国家自然科学基金资助项目(51507050);江苏省自然科学基金资助项目(BK20150822)
作者单位E-mail
孙国强 河海大学能源与电气学院, 江苏省南京市 210098  
任佳琦 河海大学能源与电气学院, 江苏省南京市 210098 webrenjiaqi@126.com 
成乐祥 国网南京供电公司, 江苏省南京市 210019  
朱瑛 河海大学能源与电气学院, 江苏省南京市 210098  
卫志农 河海大学能源与电气学院, 江苏省南京市 210098  
臧海祥 河海大学能源与电气学院, 江苏省南京市 210098  
摘要:
      锂电池荷电状态(SOC)估计是电池管理系统中不可或缺的重要组成部分。锂电池传统整数阶等效电路模型未充分考虑其内部电化学反应现象,故将导致SOC估计结果偏离真实状态。文中以磷酸铁锂电池单体为研究对象,提出一种基于分数阶阻抗模型的锂电池SOC估计方法。该方法利用分数阶元件表征锂电池内部固液界面的输运现象和极化效应,基于分数阶微分理论建立状态转移方程和系统量测方程,并针对锂电池高度非线性的工作特性,利用迹变换逼近原始状态分布,运用分数阶迹卡尔曼滤波算法估计锂电池SOC。实验结果表明,分数阶阻抗模型能准确描述锂电池工作特性,所提算法在估计精度和跟踪速度上有一定提高。
Abstract:
      State of charge(SOC)estimation for lithium-ion battery plays an important role in management system. Traditional integer-order equivalent models capture the lithium-ion battery dynamics with limited knowledge, resulting in the SOC estimation results deviating from the true states. This paper proposes a SOC estimation method of lithium-ion battery based on fractional-order impedance model. The proposed method employs fractional component to characterize the transportation phenomenon and polarization effect in the solid electrolyte interface of lithium-ion battery and introduces a fractional-order calculous to establish the state transition and systematic equation. Unscented transformation(UT)is used to approach the original state distribution for the non-linear characteristic of the lithium-ion battery and then a fractional-order unscented Kalman filter(FUKF)is synthesized to estimate the SOC of lithium-ion battery. Experimental results show that fractional-order impedance model can accurately describe the working characteristics of lithium-ion batteries. The estimation accuracy and tracking speed of the proposed method is improved as well.
查看全文(Free!)   查看附录   查看/发表评论  下载PDF阅读器