Prediction of Internal Circuit and Mechanical-Electrical-Thermal Response of Lithium-Ion Battery Cell with Mechanical-Thermal Coupled Analysis

Jaemin Moon, HyukKyun Chang, Jun Lee and Chang-Wan Kim
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Jaemin Moon: Graduate School of Mechanical Design & Production Engineering, Konkuk University, 120, Neung dong-ro, Gwangjin-gu, Seoul 05029, Korea
HyukKyun Chang: Graduate School of Mechanical Design & Production Engineering, Konkuk University, 120, Neung dong-ro, Gwangjin-gu, Seoul 05029, Korea
Jun Lee: Graduate School of Mechanical Design & Production Engineering, Konkuk University, 120, Neung dong-ro, Gwangjin-gu, Seoul 05029, Korea
Chang-Wan Kim: School of Mechanical Engineering, Konkuk University, 120, Neung dong-ro, Gwangjin-gu, Seoul 05029, Korea

Energies, 2022, vol. 15, issue 3, 1-12

Abstract: The lithium-ion battery (LIB) is widely used as an energy storage device for electric vehicles (EV) due to its advantages, such as high energy density and long lifespan. However, LIB for EV can be exposed to mechanical abuse such as vehicle collision, which causes thermal runaway due to extreme mechanical deformation. Therefore, it is necessary to predict the internal short circuit (ISC) of the LIB cell under mechanical loading conditions and to analyze the mechanical, electrical, and thermal responses after ISC. In this paper, the starting point of ISC is predicted using a two-way mechanical-electrical-thermal coupled analysis method. At the same time, mechanical responses, along with the effects of the ISC area on electrical and thermal responses of the LIB cell, were analyzed. ISC was defined as failure of the separator. The separator’s failure was calculated considering material nonlinearity. Considering the indentation test results, the finite element method (FEM) analysis could accurately predict the starting point of ISC. In the order of cylindrical, hemispherical, and conical indenters, ISC occurred quickly, and the ISC area was large. The larger the ISC area, the greater the voltage drop, current, and joule heat, and the higher the maximum temperature.

Keywords: lithium-ion battery; various indenters; two-way mechanical-electrical-thermal coupled analysis; internal short circuit; mechanical-electrical-thermal response (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 complete reference list from CitEc
Citations: View citations in EconPapers (1)

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