Energy Storage Science and Technology ›› 2017, Vol. 6 ›› Issue (5): 1008-1025.doi: 10.12028/j.issn.2095-4239.2017.00022

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Overview of the failure analysis of lithium ion batteries

WANG Qiyu, WANG Shuo, ZHANG Jienan, ZHENG Jieyun, YU Xiqian, LI Hong   

  1. Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China
  • Received:2017-06-01 Revised:2017-06-15 Online:2017-09-01 Published:2017-09-01

Abstract: The failure problems, associated with capacity fade, increased internal resistance, gas generation, electrolyte leakage, short circuit, battery deformation, thermal runaway, lithium deposition and etc., are the major issues that limit the performances, reliability and consistency of the commercialized lithium ion batteries. These problems are the result of a complex interplay of a host of chemical and physical mechanisms. A reliable analysis and fundamental understanding of aging characteristics is of critical significance for development of battery. The failure analysis of lithium ion batteries is started with the identification of the failure effects, then selected the advisable analysis methods to establish the high efficiency procedures to target the problems and thus to find out the primary causes as well as to provide reliable suggestions for further optimization of material fabrication and battery engineering. This article discusses the failure effects and their causes in lithium ion batteries. The procedure of the failure analysis and the inspection methods will also be presented. Some cases of failure analysis are reviewed in this manuscript, such as capacity fade, thermal runaway, and gas generation.

Key words: lithium-ion batteries, failure analysis