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

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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.

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

ZTFLH:	TQ152
	TP29

Issue Date: 15 May 2015

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	HE Zhichao
	YANG Geng
	LU Languang
	Wu Haisang

Cite this article:

HE Zhichao,YANG Geng,LU Languang, et al. Battery DC internal resistance test method based on the constant current external characteristics and SOC[J]. Journal of Tsinghua University(Science and Technology), 2015, 55(5): 532-537.

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http://jst.tsinghuajournals.com/EN/ OR http://jst.tsinghuajournals.com/EN/Y2015/V55/I5/532

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