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Fire Technology

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21-05-2020

Computed Tomography Analysis of Li-Ion Battery Case Ruptures

Authors: Lingxi Kong, Xiaosong Hu, Guan Gui, Yan Su, Michael Pecht

Published in: Fire Technology | Issue 6/2020

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Abstract

Battery explosion incidents hinder the development and application of Li-ion batteries. This paper describes the use of nondestructive computed tomography (CT) to analyze cylindrical Li-ion battery samples that underwent thermal runaway and exploded. Unlike destructive analysis methods, which can lead to a loss of battery structural information, CT scan allows direct observation of a battery’s internal structure without disassembly. In this study, two case studies of 20700 and 18650 batteries show that sidewall and bottom case rupture was caused by blockage of the battery vent region, which prevented the release of the generated gas. This work demonstrates the ability of CT for post-mortem incident analysis and the limitations of current vent design, and also gives insight to a safety issue with some cylindrical batteries.

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Title: Computed Tomography Analysis of Li-Ion Battery Case Ruptures
Authors: Lingxi Kong
Xiaosong Hu
Guan Gui
Yan Su
Michael Pecht
Publication date: 21-05-2020
Publisher: Springer US
Published in: Fire Technology / Issue 6/2020
Print ISSN: 0015-2684
Electronic ISSN: 1572-8099
DOI: https://doi.org/10.1007/s10694-020-00996-w

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