基于热成像的软包锂电池导热系数测试方法

doi:10.3969/j.issn.1000-1158.2021.12.07

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Abstract To provide accurate thermal conductivity value for thermal design of pouch lithium-ion cell, a test method based on thermography was proposed, which could invert the cross-plane and in-plane thermal conductivity of cell at the same time with the temperature filed data of cell surface recorded by thermal camera, avoiding the uncertainty factors brought by traditional contact temperature measurement. Several ternary polymer lithium-ion cell samples with different specifications were tested, and one type of samples was measured with steady-state method as a reference. The experimental results showed that the relative standard deviation of cross-plane and in-plane conductivity was less than 3%, and the relative deviation compared with the results of steady-state method of cross-plane conductivity was 3.1%. Therefore, the method was reliable and could provide reference data for the thermal design of cells.

Key words： metrology thermal conductivity pouch lithium-ion cell steady-state method thermography

Received: 02 July 2020 Published: 06 December 2021

PACS:

TB941

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	Articles by authors
	DONG Ze-wen
	HOU De-xin
	YE Shu-liang

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DONG Ze-wen,HOU De-xin,YE Shu-liang. Test Method of Thermal Conductivity of Pouch Lithium-ion Cell Based on Thermography[J]. Acta Metrologica Sinica, 2021, 42(12): 1596-1602.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.12.07 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I12/1596

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