Welcome to Journal of Automotive Safety and Energy,

Journal of Automotive Safety and Energy ›› 2026, Vol. 17 ›› Issue (1): 104-113.DOI: 10.3969/j.issn.1674-8484.2026.01.011

• Automotive Energy Efficiency and Environment Protection • Previous Articles     Next Articles

Research on thermal spread laws of lithium-ion batteries in enclosed spaces

FENG Xupeng1(), LI Chengbing1,2,*(), LI Rui3, XIAO Ke1, PENG Junheng1, WU Sixiang1, LIU Bohao1   

  1. 1. College of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu 610500, China
    2. Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan Province, Southwest Petroleum University, Chengdu 610500, China
    3. Chengdu Aerospace Communication Equipment CO., LTD, Chengdu 610051, China
  • Received:2025-10-20 Revised:2025-11-19 Online:2026-02-28 Published:2026-03-19

Abstract:

Using the high-energy-density ternary lithium-ion battery model LGMJ1 as the subject of investigation, the research integrated experimental data with chemical reaction kinetic modeling to conduct coupled one-dimensional and three-dimensional numerical simulations to investigate the propagation characteristics of thermal runaway in confined environments and evaluate protective strategies for lithium-ion batteries. The impact of three key parameters—the pressure-relief vent area, the air convective heat transfer coefficient, and the thermal insulation layer properties—on thermal propagation within a battery module was investigated, based on a coupled thermal-gas dynamics model developed using Amesim and STAR-CCM+. The results show that the arrangement of battery modules has a significant impact on battery thermal propagation. The fewer adjacent contact batteries with the triggering cells, the easier it is to trigger battery thermal propagation. Coordinated optimization of the vent area and convective cooling conditions can achieve efficient suppression of the thermal propagation process. Among the insulation materials, ceramic aerogel has the best performance and can effectively inhibit the propagation of thermal runaway.

Key words: ternary lithium battery, enclosed environment, thermal-gas coupling, thermal runaway propagation, insulation, needle acupuncture

CLC Number: