Thermal runaway propagation characteristics of an air-cooled cylindrical lithium-ion battery system

doi:10.19799/j.cnki.2095-4239.2020.0383

Abstract

Abstract:

The thermal power of a thermal runaway cell is calculated using its temperature obtained by existing ARC tests. The power is assigned to cells in a hybrid locomotive traction battery system, and the transient temperature of other cells around it is simulated. The simulation shows that one cell's thermal runaway cannot incur propagation when it is cooled by an air-conditioner. However, it will lead to propagation without an air-conditioner in modules, and the parallel cells' thermal runaway will cause propagation in the upper package. Lastly, preventing thermal runaway propagation was studied.

Key words: hybrid locomotive, lithium-ion traction battery system, thermal power, thermal runaway propagation

CLC Number:

U 262.9+1

Zhihong ZHANG, Junyan MOU, Yufa MENG. Thermal runaway propagation characteristics of an air-cooled cylindrical lithium-ion battery system[J]. Energy Storage Science and Technology, 2021, 10(2): 658-663.

Figures/Tables 13

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设置项	工况1	工况2
入口边界	速度入口：0.9129 m/s、40 ℃	压力入口：大气压、40 ℃
出口边界	压力出口：大气压	压力出口：大气压
初始条件	电芯2-9为开始自产热温度(80 ℃)，其余电芯温度设定为42 ℃	电芯2-9为开始自产热温度(80 ℃)，其余电芯温度设定为40 ℃
热源	电芯2-9热功率定义为图3生热功率。其余电芯0.3372 W。当某个电芯温度超过自生热温度时，再按图3定义热功率	电芯2-9热功率定义为图3生热功率。其余电芯0 W。当某个电芯温度超过自生热温度时，再按图3定义热功率
空气密度	1.25 kg/m³	不可压缩理想气体

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