리튬이온 배터리 방전 시 발열 특성 및 냉각 실험과 유한요소 해석
Thermal Characteristics and Cooling Experiments and Analysis of Finite Elements in the Discharge of Lithium-Ion Batteries
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Lithium-ion batteries are predominantly employed in electric vehicles and energy storage devices, offering the advantage of high energy density. However, they are susceptible to efficiency degradation when operated at high temperatures due to their sensitivity to the external environment. In this study, we conducted experiments using an indirect cooling method to prevent thermal runaway and explosions in lithium-ion batteries. The results were validated by comparing them with heat transfer simulations conducted through a commercial finite element analysis program. The experiments included single-cell exothermic tests and cooling experiments on a battery pack with 10 cells connected in series, utilizing 21700 lithium-ion batteries. To block external temperature influences, the experimental environment featured an extrusion method insulation in the environmental chamber. The cooling system, suitable for indirect cooling, was constructed with copper tubes and pins. The heat transfer analysis began by presenting a single-cell heating model using commercial software, which was then employed to analyze the heating and cooling of the battery pack.
Abstract
Lithium-ion batteries are predominantly employed in electric vehicles and energy storage devices, offering the advantage of high energy density. However, they are susceptible to efficiency degradation when operated at high temperatures due to their sensitivity to the external environment. In this study, we conducted experiments using an indirect cooling method to prevent thermal runaway and explosions in lithium-ion batteries. The results were validated by comparing them with heat transfer simulations conducted through a commercial finite element analysis program. The experiments included single-cell exothermic tests and cooling experiments on a battery pack with 10 cells connected in series, utilizing 21700 lithium-ion batteries. To block external temperature influences, the experimental environment featured an extrusion method insulation in the environmental chamber. The cooling system, suitable for indirect cooling, was constructed with copper tubes and pins. The heat transfer analysis began by presenting a single-cell heating model using commercial software, which was then employed to analyze the heating and cooling of the battery pack.
참고문헌 (5)
- Korea Energy Agency, "Understanding of New and Renewable Energy" (2008), Korea Energy Agency
- Wang Q., "A critical review of thermal management models and solutions of lithium-ion battery and solutions of lithium-ion batteries for the development of pure electric vehicles", Renewable and sustainable Energy Reviews, 64, pp.106~128 (2016)
- RoddM. Bandhauer, "A Critical Review of Thermal lssues in Litium-Ion Batteries", Journal of The Electrochemical Society, 158, pp.R1~25R (2011)
- ZHENPO WANG, "Finite Element Thermal Model and Simulation for a Cylindrical Li-Ion Battery", Institute of Electrical and Electronics Engineerings(USA), ~ (2017)
- Frank P. Incropera, "Principles of Heat and Mass Transfer. Table 1.1" (2014), Wiley