Volume 44, Issue 12 pp. 9466-9478
SPECIAL ISSUE RESEARCH ARTICLE

A comprehensive study on thermal conductivity of the lithium-ion battery

Lichuan Wei

Lichuan Wei

School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China

Shenzhen Envicool Technology Co. Ltd., Shenzhen, China

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Zhao Lu

Zhao Lu

School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China

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Feng Cao

Corresponding Author

Feng Cao

School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China

Correspondence

Feng Cao, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China.

Email: [email protected]

Liwen Jin, Building Environment and Equipment Engineering, Xi'an Jiaotong University, Xi'an, China.

Email: [email protected]

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Liyu Zhang

Liyu Zhang

Building Environment and Equipment Engineering, Xi'an Jiaotong University, Xi'an, China

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Xi Yang

Xi Yang

Building Environment and Equipment Engineering, Xi'an Jiaotong University, Xi'an, China

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Xiaoling Yu

Xiaoling Yu

School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China

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Liwen Jin

Corresponding Author

Liwen Jin

Building Environment and Equipment Engineering, Xi'an Jiaotong University, Xi'an, China

Correspondence

Feng Cao, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China.

Email: [email protected]

Liwen Jin, Building Environment and Equipment Engineering, Xi'an Jiaotong University, Xi'an, China.

Email: [email protected]

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First published: 03 February 2020
Citations: 69

Summary

The reliable thermal conductivity of lithium-ion battery is significant for the accurate prediction of battery thermal characteristics during the charging/discharging process. Both isotropic and anisotropic thermal conductivities are commonly employed while exploring battery thermal characteristics. However, the study on the difference between the use of two thermal conductivities is relatively scarce. In this study, the isotropic and anisotropic thermal conductivities of the four commercially available lithium-ion batteries, ie, LiCoO2, LiMn2O4, LiFePO4, and Li (NiCoMn)O2, were reviewed and evaluated numerically through the heat conduction characteristics inside the battery. The results showed that there are significant differences in the temperature distribution in the battery caused by the isotropic and anisotropic thermal conductivities, which could affect the layout and cooling effectiveness of battery thermal management system. Furthermore, the effective thermal conductivities of porous electrodes and separator were determined to establish thermal conductivity bounds of lithium-ion batteries combined with the thicknesses of battery components. The thermal conductivity bounds could be applied to evaluate the rationality of the thermal conductivity data used in battery thermal models.

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