Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (12): 86-91,127.

• Automotive Engineering • Previous Articles     Next Articles

Modular Equalization Control Scheme of Power Battery Packs

Zhao Yi-fan1  Yan Fu-wu1  Du Chang-qing1  Wu You-yu1  Li Zheng2   Luo Yuan2   

  1. 1. Hubei Key Laboratory of Advanced Technology of Automobile Parts,Wuhan University of Technology,Wuhan 430070,Hubei,China; 2. Technical Centre of Dongfeng Motor Corporation,Wuhan 430056,Hubei,China
  • Received:2012-02-23 Revised:2012-06-30 Online:2012-12-25 Published:2012-11-02
  • Contact: 赵奕凡(1986-) ，男，博士，主要从事汽车新能源及动力装置研究． E-mail:zhaoyf214@163.com
  • About author:赵奕凡(1986-) ，男，博士，主要从事汽车新能源及动力装置研究．
  • Supported by:

    国家"863”计划项目( 2011AA11A225) ; 中国博士后科学基金资助项目( 20110491226)

PDF

947

Abstract:

In this paper,first,the impacts of imbalanced battery cell on the performance of power battery packs are discussed,and several equalization schemes and the corresponding control circuits are analyzed. Then,an equalization control scheme of the power battery packs in modular structure is proposed,which determines the equalization control strategy according to the voltage difference of adjacent battery cells by considering the relationship between the terminal voltage and the state of charge of the battery cell and by monitoring the terminal voltage in real time. Moreover,two equalizers respectively corresponding to the dissipation and the non-dissipation equilibriums are designed to conduct the charging and discharging equalization experiments on LiFePO4 battery pack. The results show that the proposed scheme achieves effective equalization control of power battery packs consisting of random battery units.

Key words: power battery pack, modular structure, equalization control, dissipation equilibrium, non-dissipation equilibrium