考虑温度影响和滞回效应的锂电池特性建模*

doi:10.19562/j.chinasae.qcgc.2019.03.014

汽车工程 ›› 2019, Vol. 41 ›› Issue (3): 334-339.doi: 10.19562/j.chinasae.qcgc.2019.03.014

考虑温度影响和滞回效应的锂电池特性建模^*

宋凯,陈旭,成艾国

湖南大学,汽车车身先进设计制造国家重点实验室,长沙 410082

收稿日期:2018-01-24 出版日期:2019-03-25 发布日期:2019-03-25
通讯作者: 陈旭,硕士研究生,E-mail:chenxu152@163.com
基金资助:
国家自然科学基金青年项目(51605155)和国家国际科技合作专项(2016YFE0102200)资助

Modeling of Lithium Battery Characteristics Considering the Influence of Temperature and Hysteresis Effect

Song Kai, Chen Xu & Cheng Aiguo

Hunan University, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Changsha 410082

Received:2018-01-24 Online:2019-03-25 Published:2019-03-25

摘要/Abstract

摘要： 为提高锂电池建模精度,对滞回电压引起的SOC估计误差进行分析,表明锂电池建模不可忽略滞回效应的影响。通过对不同温度下滞回电压变化规律和影响锂电池动态特性的内部电化学过程的分析,提出锂电池等效滞回模型。利用不同温度下小倍率恒流充放电实验和城市道路循环工况分别对电池模型开路电压和阻抗参数进行辨析。最后将模型输出端电压和SOC估计值与实验值进行对比,结果表明在锂电池建模时考虑滞回效应的影响可将模型精度提高一倍。

关键词: 锂电池, 开路电压, 荷电状态, 滞回效应

Abstract: In order to improve the accuracy of lithium battery model, the SOC estimation error caused by hysteresis voltage is analyzed, indicating that the influence of hysteresis cannot be neglected in modeling lithium battery. Thus an equivalent hysteresis model for lithium battery is proposed based on the analysis on the changing pattern of hysteresis voltage at different temperatures and the internal electrochemical processes, affecting the dynamic characteristics of lithium battery. Then the OCV and impedance parameters are discriminated respectively by using the small constant rate charge-discharge experiment at different temperatures and the urban road driving cycle. Finally, the estimated terminal voltage and SOC of battery model are compared with experimental data. The results show that the accuracy of model can be doubled when the hysteresis effect is taken into account in lithium battery modeling

Key words: lithium battery, OCV, SOC, hysteresis effect

宋凯,陈旭,成艾国. 考虑温度影响和滞回效应的锂电池特性建模^*[J]. 汽车工程, 2019, 41(3): 334-339.

Song Kai, Chen Xu & Cheng Aiguo. Modeling of Lithium Battery Characteristics Considering the Influence of Temperature and Hysteresis Effect[J]. , 2019, 41(3): 334-339.

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考虑温度影响和滞回效应的锂电池特性建模^*

Modeling of Lithium Battery Characteristics Considering the Influence of Temperature and Hysteresis Effect

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