基于恒流外特性和SOC的电池直流内阻测试方法

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清华大学辅仁网/2017-07-07

何志超¹, 杨耕¹, 卢兰光², 吴海桑¹

1. 清华大学自动化系, 北京 100084;
2. 清华大学汽车安全与节能国家重点实验室, 北京 100084

Battery DC internal resistance test method based on the constant current external characteristics and SOC

HE Zhichao¹, YANG Geng¹, LU Languang², Wu Haisang¹

1. Department of Automation, Tsinghua University, Beijing 100084, China;
2. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China

摘要:

输出: BibTeX | EndNote (RIS)

摘要电池的直流内阻是电池内部离子电阻与电子电阻之和。它决定电池功率特性, 同时也反映电池的老化状况与一致性, 因此对于电池的外特性建模与应用非常重要。该文提出了一种基于电池恒流外特性的直流内阻测试方法。该方法将不同恒流工况下的电池荷电状态(state of charge, SOC)变化过程归一化, 从而能够利用恒流充放电曲线来获取不同工作电流及SOC条件下的直流内阻。该方法在保证测试精度的同时比已有方法更加简便。

关键词 ：锂离子电池,直流内阻,恒流外特性,荷电状态

Abstract：The direct current internal resistance (DCIR) is the sum of a battery's ionic and electronic resistances. The DCIR test indicates the battery's power characteristics and reflects the batteries' aging and uniformity characteristics. Thus, it is important for battery modeling and applications. This paper describes a DCIR test method based on the battery's constant current external characteristics. This method normalizes the battery's state of charge (SOC) changes for different constant current conditions. Then, the DCIR for different operating currents and SOC are obtained using constant current charge/discharge curves. This method is easier to implement than existing methods and has good accuracy.

Key words：lithium-ion battery direct current internal resistance (DCIR)constant current external characteristics state of charge (SOC)

收稿日期: 2014-09-16 出版日期: 2015-08-04

ZTFLH:	TQ152
	TP29

通讯作者:杨耕,教授,E-mail:yanggeng@tsinghua.edu.cnE-mail: yanggeng@tsinghua.edu.cn

引用本文:

何志超, 杨耕, 卢兰光, 吴海桑. 基于恒流外特性和SOC的电池直流内阻测试方法[J]. 清华大学学报（自然科学版）, 2015, 55(5): 532-537.
HE Zhichao, YANG Geng, LU Languang, Wu Haisang. Battery DC internal resistance test method based on the constant current external characteristics and SOC. Journal of Tsinghua University(Science and Technology), 2015, 55(5): 532-537.

链接本文:

http://jst.tsinghuajournals.com/CN/或 http://jst.tsinghuajournals.com/CN/Y2015/V55/I5/532

图表:

图１　阳极极化曲线

图２　电池的直流内阻模型

表１　电池参数

图３　以时间为横坐标的恒流充放电曲线

图４　以SOC为横坐标的恒流充放电曲线

图５　直流内阻测试方法

图６　不同条件下的直流内阻曲线

图７　直流内阻测试流程示意图^[１９]

图８　直流内阻结果对比

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