한국수소및신에너지학회논문집 (Transactions of the Korean hydrogen and new energy society)

  • 제31권5호
  • /
  • Pages.489-497
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  • 2020
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  • 1738-7264(pISSN)
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  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
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CFD 해석을 적용한 18650 리튬-이온 배터리 팩의 열 해석 신뢰도 기초 분석

Basic Investigation into the Validity of Thermal Analysis of 18650 Li-ion Battery Pack Using CFD Simulation

  • 심창휘 (서울과학기술대학교 기계.자동차공학과) ;
  • 김한상 (서울과학기술대학교 기계.자동차공학과)
  • SIM, CHANG-HWI (Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology) ;
  • KIM, HAN-SANG (Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology)
  • 투고 : 2020.10.08
  • 심사 : 2020.10.30
  • 발행 : 2020.10.30
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초록

The Li-ion battery is considered to be one of the potential power sources for electric vehicles. In fact, the efficiency, reliability, and cycle life of Li-ion batteries are highly influenced by their thermal conditions. Therefore, a novel thermal management system is highly required to simultaneously achieve high performance and long life of the battery pack. Basically, thermal modeling is a key issue for the novel thermal management of Li-ion battery systems. In this paper, as a basic study for battery thermal modeling, temperature distributions inside the simple Li-ion battery pack (comprises of nine 18650 Li-ion batteries) under a 1C discharging condition were investigated using measurement and computational fluid dynamics (CFD) simulation approaches. The heat flux boundary conditions of battery cells for the CFD thermal analysis of battery pack were provided by the measurement of single battery cell temperature. The temperature distribution inside the battery pack were compared at six monitoring locations. Results show that the accurate estimation of heat flux at the surface of single cylindrical battery is paramount to the prediction of temperature distributions inside the Li-ion battery under various discharging conditions (C-rates). It is considered that the research approach for the estimation of temperature distribution used in this study can be used as a basic tool to understand the thermal behavior of Li-ion battery pack for the construction of effective battery thermal management systems.

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참고문헌

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