Experimental analysis of thermal runaway in 18650 cylindrical Li-Ion cells using an accelerating rate calorimeter

被引：145

作者：

Lei B. ^{[1
]}

Zhao W. ^{[1
]}

Ziebert C. ^{[1
]}

Uhlmann N. ^{[1
]}

Rohde M. ^{[1
]}

Seifert H.J. ^{[1
]}

机构：

[1] Institute of Applied Materials-Applied Materials Physics, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen

来源：

Batteries | 2017年 / 3卷 / 02期

关键词：

Accelerating rate calorimeter (ARC); Li-ion cell; Pressure change; Thermal runaway;

D O I：

10.3390/batteries3020014

中图分类号：

学科分类号：

摘要：

In this work, commercial 18650 lithium-ion cells with LiMn2 O4, LiFePO4, and Li(Ni0.33 Mn0.33 Co0.33 )O2 cathodes were exposed to external heating in an accelerating rate calorimeter (es-ARC, Thermal Hazard Technology (THT), Bletchley, UK), to investigate the thermal behavior under abuse conditions. New procedures for measuring the external and internal pressure change of cells were developed. The external pressure was measured utilizing a gas-tight cylinder inside the calorimeter chamber, in order to detect the venting of the cells. For internal pressure measurements, a pressure line connected to a pressure transducer was directly inserted into the cell. During the thermal runaway experiments, three stages (low rate, medium rate, and high rate reactions) were observed. Both the pressure and temperature change indicated different stages of exothermic reactions, which produced gases or/and heat. The onset temperature of the thermal runaway was estimated according to the temperature and pressure changes. Moreover, the different activation energies for the exothermic reactions could be derived from Arrhenius plots. © 2017 by the authors. Licensee MDPI, Basel, Switzerland.

引用

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