中国机械工程

• 机械基础工程 • 上一篇    下一篇

基于可信度因子推理模型的电池组均衡方法

刘征宇1,2;王雪松1;汤伟1;严鹏1   

  1. 1.合肥工业大学机械工程学院,合肥,230009
    2.工业安全与应急技术安徽省重点实验室,合肥,230009
  • 出版日期:2019-05-10 发布日期:2019-05-14
  • 基金资助:
    安徽省自然科学基金资助项目(1808085MF200);
    工业和信息化部民用飞机专项(MJ-2017-D-26)

A Battery Equalization Strategy Based on Reasoning Model of C-F

LIU Zhengyu1,2;WANG Xuesong1;TANG Wei1;YAN Peng1   

  1. 1.School of Mechanical Engineering,Hefei University of Technology,Hefei,230009
    2.Anhui Province Key Laboratory of Industry Safety and Emergency Technology,Hefei,230009
  • Online:2019-05-10 Published:2019-05-14

摘要: 针对锂离子电池在成组使用过程中出现的电压、容量、内阻等不一致性问题  ,分析了传统电压均衡策略的优缺点,结合双向Cuk分组均衡器控制简单、均衡能量可双向传输及均衡电流易控制的特点,提出了一种基于可信度因子(C-F)  推理模型的分组均衡方法。该方法定义了单体电池的荷电状态(SOC)和端电压的不均衡度,利用C-F推理模型得到了电池组整体不均衡度,通过控制拓扑电路的均衡电流大小和方向减小了电池组的不一致性。对比实验表明,该方法能够有效地减小单体电池端电压和SOC的不一致性,提高电池组的整体能量利用率。

关键词: 电池均衡, 分组拓扑, 不均衡度, C-F推理模型

Abstract: A battery equalization strategy on the basis of the reasoning model of C-F was proposed,based on the analysis of the advantages and disadvantages of terminal voltage balancing strategy, combined the bidirectional Cuk equalizer which was simple to control balancing circuit and equalization energy, for the inconsistency of voltage, capacity and internal resistance of lithium-ion batteries in group use. To solve the problems of the inconsistency in use of lithium-ion batteries, individual imbalance degree of state of charge (SOC) and terminal voltages were defined. Overall imbalance degree was derived by using C-F model, and the difference of batteries was reduced by controlling the magnitude and direction of the equalization current of the topology circuit. Experimental results show that, this method may effectively reduce the difference of  terminal voltages and SOC of individual battery in the discharging and charging processes, and improve the efficiency of energy utilization.

Key words: battery equalization, grouped topology, imbalance degree, reasoning model of credibility factor(C-F)

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