Investigation on internal short circuits of lithium polymer batteries with a ceramic-coated separator during nail penetration

Cheon Soo Kim, Jin Seong Yoo, Kyung Min Jeong, Keon Kim, Cheol Woo Yi

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Internal short circuit of a lithium polymer battery (4.6 Ah capacity and 4.30 V charging voltage) with a ceramic-coated separator has been investigated by infrared measurement during nail penetration. The surface temperatures at nail penetration area and battery body were simultaneously measured by infrared camera and, as a result, three different failure modes have been proposed. The battery with 100% of SOC experiences thermal runaway phenomenon by means of the second internal short circuit. The batteries with low SOC (0% and 50% of SOC) were also investigated to identify the phenomena occurred in SOC 100% battery (the second internal short circuit), but neither fire nor explosion in the battery with low SOC was observed. The analysis of burr status after nail penetration demonstrates that it is quite important factor related to the failure modes. The results of this study can be applied to the design of safe battery.

Original languageEnglish
Pages (from-to)41-49
Number of pages9
JournalJournal of Power Sources
Volume289
DOIs
Publication statusPublished - 2015 Sep 1

Keywords

  • Ceramic coated separator
  • Infrared measurement
  • Internal short circuit
  • Lithium polymer battery
  • Nail penetration
  • Slim and wide battery

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

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