Energy Storage Science and Technology ›› 2023, Vol. 12 ›› Issue (11): 3545-3555.doi: 10.19799/j.cnki.2095-4239.2023.0512

• Energy Storage Test: Methods and Evaluation • Previous Articles     Next Articles

Research progress on the safety-state assessment of lithium-ion batteries

Shuang SONG1(), Fu LI1,2, Xisheng TANG1,2()   

  1. 1.Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
    2.School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2023-07-31 Revised:2023-08-29 Online:2023-11-05 Published:2023-11-16
  • Contact: Xisheng TANG E-mail:songshuangiee@mail.iee.ac.cn;tang@mail.iee.ac.cn

Abstract:

The assessment of the state of safety (SOS) of Li-ion batteries (LiB) is required to determine the sustained impact of the internal and external conditions on battery safety, as well as the monitoring of the safety status of batteries throughout their lifecycle. SOS assessment can provide a judgment basis for advance fault warning and intelligent operation and maintenance; this is crucial for improving the security and reliability of the energy storage system. However, several questions still remain to be answered about the usability and accuracy of SOS assessment results in battery management systems or big data platforms. A LiB has many failure modes, a complex influence mechanism, and fuzzy definition of SOS. This paper summarizes the definition and classification, evaluation method, influencing factors, and safety boundary of battery SOS. In addition, the paper summarizes the influence mechanism of nine factors, namely voltage, ambient temperature, current, mechanical deformation, limiting external conditions, state of charge, state of health, internal resistance, and state of Li plating on the safety of LiBs. The shortcomings of the current SOS evaluation of LIBs are discussed based on three aspects, namely the coupling mechanism of multiple factors, security threshold migration model, and quantitative evaluation method. Finally, the paper points out future research direction.

Key words: lithium-ion batteries, energy storage system, state of safety (SOS) assessment

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