Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (7): 2316-2323.doi: 10.19799/j.cnki.2095-4239.2021.0644

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

Research prospect on reliability of Li-ion battery packs under coupling of multiple physical fields

Long CHEN1(), Quan XIA2(), Yi REN2, Gaoping CAO1, Jingyi QIU1(), Hao ZHANG1()   

  1. 1.Research Institute of Chemical Defense
    2.School of Reliability and Systems Engineering, Beihang University, Beijing 100191, China
  • Received:2021-12-03 Revised:2022-01-14 Online:2022-07-05 Published:2022-06-29
  • Contact: Jingyi QIU, Hao ZHANG E-mail:ChenL246@163.com;quanxia@buaa.edu.cn;qiujingyi1202@163.com;dr.h.zhang@hotmail.com

Abstract:

Recently, Li-ion battery safety accidents in the fields of energy storage and electric cars have become more common.The study of failure mechanisms and the improvement of lithium-ion battery safety and dependability has become a research hotspot. The failure behaviors of a lithium-ion battery are of various forms, greatly hazardous, and complex to assess and detect. Traditional failure mechanism analysis methods destroy and disassemble the battery, making it impossible to adequately characterize and forecast a safety mishap. It is thought to be a more scientific and effective approach to analyzing the possibility of an accident with the Li-ion battery or pack's reliability. However, the research on battery pack reliability has just started, and there are some shortcomings, such as the coupling of multiple physical fields cannot be considered, and the analysis error is large. The reliability analysis meaning of Li-ion batteries is first explained in this study, followed by current research progress and existing challenges of reliability modeling and analysis methodologies. The multi-physical field coupling reliability research approach for lithium-ion battery packs is given. The current issues and challenges are examined in depth, and a battery failure analysis technique is proposed by merging the level by level retrospective analysis method based on Bayesian theory with a multiple physical fields coupling model.

Key words: Li-ion battery pack, safety failure, reliability, coupling of multiple physical fields

CLC Number: