中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2019, Vol. 38 ›› Issue (02): 133-138.DOI: 10.3969/j.issn.1674-0696.2019.02.19

• 载运工具与机电工程 • 上一篇    下一篇

基于等效模型扩展卡尔曼滤波锂电池SOC估算

安治国1,孙志昆1,张栋省1,郭敬谊2   

  1. (1. 重庆交通大学 机电与车辆工程学院,重庆 400074; 2. 重庆交通大学 外国语学院,重庆 400074)
  • 收稿日期:2018-03-05 修回日期:2018-04-04 出版日期:2019-02-22 发布日期:2019-02-22
  • 作者简介:安治国(1976—),男,山西太原人,副教授,博士,主要从事新能源汽车动力系统方面的研究。E-mail:108844410@qq.com。 通信作者:孙志昆(1992—),男,河南长垣人,硕士研究生,主要从事新能源汽车动力系统方面的研究。E-mail:1083262724@qq.com。
  • 基金资助:
    重庆市科委基础科学与前沿技术研究(重要)项目(cstc2015jcyjB0333)

SOC Estimation of Lithium Battery Based on Equivalent Model of Extended Kalman Filter

AN Zhiguo1, SUN Zhikun1, ZHANG Dongsheng1, GUO Jingyi2   

  1. (1. School of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China; 2. School of Foreign Language, Chongqing Jiaotong University, Chongqing 400074, P. R. China)
  • Received:2018-03-05 Revised:2018-04-04 Online:2019-02-22 Published:2019-02-22

摘要: 电池管理系统(BMS)的主要任务是对电池荷电状态(SOC)、续航里程和防止电池过充过放等进行实时诊断,其中电池荷电状态的快速精确的估计是 BMS的核心技术。基于锂电池这一动态非线性系统,提出了一种更接近于真实的、改进的PNGV电池等效模型;基于改进的PNGV电池等效模型,对比了卡尔 曼滤波算法(KF)和扩展卡尔曼滤波算法(EKF)诊断电池荷电状态的实验结果;分析了扩展卡尔曼滤波算法诊断的实验误差。研究表明:采用扩展卡尔曼滤 波算法对电池荷电状态进行诊断得到的结果更加精确,其误差能够一直保持在5%以内。

关键词: 车辆工程, 锂电池, 荷电状态, 电池等效模型, 扩展卡尔曼滤波

Abstract: The main task of the battery management system (BMS) is to diagnose the battery state of charge (SOC), endurance mileage and prevent overcharge and discharge of batteries in real time. The rapid and accurate estimation of SOC is the core technology of BMS. Based on the dynamic nonlinear system of lithium battery, a more realistic and improved equivalent model of PNGV battery was proposed. Based on the improved PNGV battery equivalent model, the experimental results of battery SOC diagnosis of Kalman filter (KF) and extended Kalman filter (EKF) were compared. The experimental error of EKF was analyzed. The results show that EKF is more accurate in diagnosing battery SOC, and the error can be kept within 5%.

Key words: vehicle engineering, lithium battery, state of charge, battery equivalent model, extended Kalman filter (EKF)

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