Stress and Displacement of Cylindrical Lithium-Ion Power Battery during Charging and Discharging

Jingyi Chen, Genwei Wang (), Hui Song, Bin Wang (), Guiying Wu and Jianyin Lei
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Jingyi Chen: Shanxi Key Laboratory of Material Strength and Structure Impact, Taiyuan 030024, China
Genwei Wang: Shanxi Key Laboratory of Material Strength and Structure Impact, Taiyuan 030024, China
Hui Song: Shanxi Key Laboratory of Material Strength and Structure Impact, Taiyuan 030024, China
Bin Wang: Department of Mechanical and Aerospace Engineering, Brunel University London, London UB8 3PH, UK
Guiying Wu: Shanxi Key Laboratory of Material Strength and Structure Impact, Taiyuan 030024, China
Jianyin Lei: Shanxi Key Laboratory of Material Strength and Structure Impact, Taiyuan 030024, China

Energies, 2022, vol. 15, issue 21, 1-22

Abstract: During the charging and discharging process of a lithium-ion power battery, the intercalation and deintercalation of lithium-ion can cause volume change in the jellyroll and internal stress change in batteries as well, which may lead to battery failures and safety issues. A mathematical model based on a plane strain hypothesis was established to predict stresses in both the radial and hoop directions, with the hoop stress of each winding layer of the jellyroll obtained. Displacements of the steel case, the jellyroll, and the core of the battery during the charging and discharging processes were also analyzed, with the effect of lithium-ion concentration and the battery size discussed. The research results can explain well the wrinkling and fracture of the jellyroll.

Keywords: lithium-ion battery; swelling; wrinkling; lithium-ion concentration; radial stress; hoop stress (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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