Experimental study of internal and external short circuits of commercial automotive pouch lithium-ion cells

Ahmed Abaza, Stefania Ferrari, Hin Kwan Wong, Chris Lyness, Andy Moore, Julia Weaving, Maria Blanco-Martin, Richard Dashwood, Rohit Bhagat

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

In order to develop a deeper understanding of the behaviour of commercial automotive lithium-ion pouch cells under short-circuiting conditions, two scenarios were experimentally investigated and compared. Firstly, experiments were conducted by internally shorting 15 Ah cells by full nail penetration using three different nail materials; copper, steel and plastic. A second set of experiments involved externally shorting the cell tabs using an external circuit with a range of resistance values. In both scenarios the cell electrical and thermal response were determined by the shorting resistance. In the case of nail penetration there was a clear distinction between the outcome of the conducting and non-conducting nails, although the outcome using conducting nails suffered from poor reproducibility. The poor reproducibility was attributed to the variation in the contact resistance between the nail and the cell layers. Correlating the outcome of both tests can be used to estimate the shorting resistance and construct the current profile during nail penetration test.

Original languageEnglish
Pages (from-to)211-217
Number of pages7
JournalJournal of Energy Storage
Volume16
Early online date6 Feb 2018
DOIs
Publication statusPublished - 1 Apr 2018

Keywords

  • Abuse testing
  • Electric vehicles
  • External short circuit
  • Lithium-ion cells
  • Nail penetration
  • Safety

ASJC Scopus subject areas

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

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