高温环境下锂离子电池组热失控仿真研究

doi:10.19964/j.issn.1006-4990.2024-0220

Abstract

Abstract:

In order to study the thermal runaway characteristics of lithium-ion battery modules in high temperature environment，based on the equation of energy conservation and the heat generation equation of side reactions，a three-dimensional numerical model of lithium-ion battery modules was established，and key physical processes such as temperature distribution，heat transfer，and heat generated by the side reactions within the battery modules were simulated，and the effect of parameters such as ambient temperature，heat transfer coefficient，initial temperature on the thermal runaway of lithium-ion battery modules was analyzed.The results showed that as the ambient temperature rised，more heat was generated inside the battery modules due to the accelerated rate of chemical reactions.When the ambient temperature reached 140 ℃，with heat transfer coefficients of 10 W/（m²·K），15 W/（m²·K） and 25 W/（m²·K），the heat of these reactions became quantitatively larger，and leaded to the occurrence of thermal runaway of the battery.Further，when the ambient temperature was 170 ℃，the heat transfer coefficients were 5 W/（m²·K） and 25 W/（m²·K），the thermal runaway of the battery module occured around 16 200 s and 4 600 s，respectively，and the peak temperature of thermal runaway was around 375 ℃.When the ambient temperature was 170 ℃，the initial temperature was 20 ℃ and 100 ℃，the thermal runaway of the battery modules occured around 9 280 s and 3 980 s，respectively，and the peak temperature of the thermal runaway was around 380 ℃.It showed that under the high temperature environment，the higher of the initial temperature and the higher of the heat transfer coefficient，the earlier thermal runaway occured，but both the initial temperature and the heat transfer coefficient had little effect on the peak temperature of the thermal runaway.

Key words: battery modules, numerical model, thermal runaway, high temperature environment

CLC Number:

TQ131.11

YE Bin, XU Shun, HUANG Hua. Simulation study on thermal runaway of lithium-ion battery modules in high temperature environments[J]. Inorganic Chemicals Industry, 2025, 57(4): 52-59.

Figures/Tables 17

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环境温度/℃	失控初始时间/s	失控顶峰时间/s	失控顶峰温度/℃
140（实验）	16 000	16 400	356
140（仿真）	16 200	16 700	359.08
170（实验）	8 900	9 000	370
170（仿真）	9 200	9 400	374.66

环境温度/℃	传热系数/ （W∙m^-2∙K^-1）	失控初始时间/s	失控初始温度/℃	失控顶峰时间/s	失控顶峰温度/℃
140	10	16 500	182.74	16 700	362.23
	15	12 900	182.03	13 200	356.55
	25	10 000	184.85	10 400	346.66
170	5	16 200	162.92	16 500	375.06
	10	9 200	167.33	9 400	374.66
	15	6 700	167.49	6 900	375.01
	25	4 600	168.09	4 800	374.08

环境温度/℃	初始温度/℃	失控初始时间/s	失控初始温度/℃	失控顶峰时间/s	失控顶峰温度/℃
127	100	18 100	209.59	18 400	324.80
140	20	16 300	172.33	16 700	359.14
	40	14 900	171.01	15 300	360.13
	60	13 000	172.88	13 300	366.37
	100	7 700	169.72	8 100	365.02
170	20	9 280	180.75	9 360	379.58
	40	8 260	183.31	8 340	379.29
	60	7 020	179.39	7 140	377.43
	100	3 980	184.91	4 060	384.42

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Inorganic Acid-Base-Salt Committee of CIESC

Simulation study on thermal runaway of lithium-ion battery modules in high temperature environments

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