Acta Metrologica Sinica  2021, Vol. 42 Issue (12): 1596-1602    DOI: 10.3969/j.issn.1000-1158.2021.12.07
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Test Method of Thermal Conductivity of Pouch Lithium-ion Cell Based on Thermography
DONG Ze-wen,HOU De-xin,YE Shu-liang
Institute of Industry and Trade Measurement Technique, China Jiliang University, Hangzhou, Zhejiang 310018, China
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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 wordsmetrology      thermal conductivity      pouch lithium-ion cell      steady-state method      thermography     
Received: 02 July 2020      Published: 06 December 2021
PACS:  TB941  
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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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