系统仿真学报 ›› 2017, Vol. 29 ›› Issue (3): 609-617.doi: 10.16182/j.issn1004731x.joss.201703019

• 仿真应用工程 • 上一篇    下一篇

基于SOC的锂动力电池组双向主动均衡控制

宋绍剑, 王志浩, 林小峰   

  1. 广西大学电气工程学院,广西 南宁 530004
  • 收稿日期:2015-06-03 修回日期:2015-09-03 出版日期:2017-03-08 发布日期:2020-06-02
  • 作者简介:宋绍剑(1970-),男,广西象州,硕士,教授,硕导,研究方向为新能源转换与控制,复杂系统建模与优化。
  • 基金资助:
    国家自然科学基金(61364007),广西科学研究与技术开发计划项目(桂科攻14122007-33),科学研究与技术开发计划项目(20141050)

SOC-Based Bi-Directional Active Equalization Control for Lithium-Ion Power Battery

Song Shaojian, Wang Zhihao, Lin Xiaofeng   

  1. School of Electrical Engineering, Guangxi University, Nanning 530004, China
  • Received:2015-06-03 Revised:2015-09-03 Online:2017-03-08 Published:2020-06-02

摘要: 电动汽车锂动力电池组中单体电池的不一致性会导致电池组的容量和使用寿命的衰减,严重影响了电动汽车的性能。为此设计了一种以双向Buck-Boost拓扑为主电路的主动均衡控制系统,采用极限学习机(Extreme Learning Machine, ELM) 预测电池的荷电状态(State of Charge, SOC),并以SOC作为主要的均衡判据,提出了一种新型的主动均衡控制策略,实现了锂电池组在充电过程和静置状态下的主动均衡。实验结果表明:所提出的双向主动均衡控制方法可以准确高效地实现均衡目标,且能量损耗较少。

关键词: 锂电池组, 电池荷电状态, 极限学习机, 均衡控制策略

Abstract: The inconsistency of cell in the electric vehicles' lithium-ion power battery pack leads to decrease the battery pack's capacity and lifetime, and even seriously affect the electric vehicles' performance. An active equalization system was designed based on the bi-directional Buck-Boost topology. A novel active equalization control strategy was proposed to balance the lithium-ion battery pack in the process of charging and static state, which extreme learning machine (ELM) was used to predict the state of charge(SOC), and SOC was employed as the main balance criterion. The simulation results show that the proposed bi-directional active equalization method can realize the equalization target accurately and efficiently with less energy loss.

Key words: Lithium-Ion battery string, SOC, ELM, equalization control strategy

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