Experimental Analysis of Thermal Runaway in 18650 Cylindrical Li-Ion Cells Using an Accelerating Rate Calorimeter

By Boxia Lei, Carlos Ziebert, Wenjiao Zhao, A. Melcher, M. Rohde, H. Seifert. 2016

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In this work, commercial 18650 lithium-ion cells with LiMn2O4, LiFePO4, and Li(Ni0.33Mn0.33Co0.33)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.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/d38e162c0cad2e37a5a0bdabc6668419328d9f35

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Citations in the corpus

Pursuing safer batteries: Thermal abuse of LiFePO4 cells (2019, methodology): “Li-ion cells have been studied by adiabatic calorimetry methods, including ARC (Jiang and Dahn, 2004b; Ben Mayza et al., 2011; Ishikawa et al., 2012; Mendoza-Hernandez et al., 2015; Lei et al., 2017), vent sizing package 2 (VSP2) (Jhu et al.”