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清华大学学报(自然科学版)  2015, Vol. 55 Issue (5): 532-537    
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基于恒流外特性和SOC的电池直流内阻测试方法
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
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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。
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何志超
杨耕
卢兰光
吴海桑
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 wordslithium-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.cn     E-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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