Energy Storage Science and Technology ›› 2021, Vol. 10 ›› Issue (1): 1-6.doi: 10.19799/j.cnki.2095-4239.2020.0345

• Contention of Sciences and Technologies of Energy Storage • Previous Articles     Next Articles

Safety accidents of Li-ion batteries: Reliability issues or safety issues

Li WANG1(), Leqiong XIE1, Guangyu TIAN2, Xiangming HE1,2()   

  1. 1.Institute of Nuclear Energy and New Energy Technology, Tsinghua University, Beijing 100084, China
    2.State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
  • Received:2020-10-28 Revised:2020-11-07 Online:2021-01-05 Published:2021-01-08

Abstract:

Safety accidents related to lithium-ion batteries occur frequently, causing the safety research of lithium-ion batteries to become a hot topic. This paper analyzes that most of the safety failure stem from the poor reliability of battery products. Reliability is the ability or possibility of a product to perform the predetermined function without failure within a specified period of time and under specified conditions, which is measured by probability. The safety accidents of lithium-ion batteries meet the definition characteristics of reliability. This paper answered why strict safety testing standards cannot eliminate battery safety failure, analyzed the causes of potential safety failure of lithium-ion batteries from the perspective of reliability, and explored their potential test methods. By this paper, measures to avoid or reduce the damage after safety failure are expected. It is emphasized that besides the research on the safety of lithium-ion battery, the reliability research should be paid more attention to.

Key words: lithium-ion batteries, safety accident, reliability, thermal runaway, safety failure

CLC Number: