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Internal short circuit in Li-ion cells

Authors
Journal
Journal of Power Sources
0378-7753
Publisher
Elsevier
Publication Date
Volume
191
Issue
2
Identifiers
DOI: 10.1016/j.jpowsour.2009.02.070
Keywords
  • Li-Ion Cells
  • Li-Ion Batteries
  • Internal Short Circuit
  • Thermal Stability

Abstract

Abstract Effects of internal short circuit (ISCr) on thermal stability of Li-ion cells of various sizes (130–1100 mAh) are investigated using a combination of experimental methods and thermal modeling. Three experimental methods were evaluated: small nail penetration, small indentation, and cell pinch test. The small nail penetration and indentation tests created significant heat sinking to the cell-can or to the nail. Only the cell pinch test provided a reasonable approximation of a high risk ISCr event. ISCr location plays a critical role in the consequences of an ISCr event. ISCr at the edge of the electrode is the worst case because of its limited heat conduction to the cell-can. The effects of cell capacity and state of charge on ISCr are also evaluated through tests and thermal modeling.

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