(A) numerical study on high temperature-induced thermal runaway behavior of a prismatic li-ion battery = 고온에 의한 각주형 리튬이온전지의 열폭주 현상에 대한 수치해석

Simulations of the battery oven test, as one of the safety regulations, have been conducted for large-scale lithium-ion batteries for EV applications. A three-dimensional model is developed and compared with a lumped model. The lumped model simulates the battery temperature well under normal discharge conditions, but becomes inaccurate when the thermal runaway occurs. The effect of battery scale on thermal runaway is investigated. It is found that the smaller batteries can dissipate heat more efficiently than the larger batteries, and the possibility of experiencing thermal runaway is lower. The radiative heat transfer is found to be a significant means of battery heat dissipation. The internal temperature distribution during the thermal runaway is plotted and investigated. Propagation of local hot spot and strong internal temperature gradient are observed. It is concluded that the large-scale batteries are vulnerable to the oven test, and other means of heat dissipation, such as heat sinks may be needed to pass the oven test.
Advisors
Choi, Do-Hyungresearcher최도형researcher
Publisher
한국과학기술원
Issue Date
2010
Identifier
455124/325007  / 020084132
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학전공, 2010.08, [ viii, 63 p. ]

Keywords

CFD; thermal runaway; lithium-ion battery; prismatic; 각주형; 수치해석; 열폭주; 리튬이온전지

URI
http://hdl.handle.net/10203/45826
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=455124&flag=t
Appears in Collection
ME-Theses_Master(석사논문)
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