Energy Storage Science and Technology ›› 2024, Vol. 13 ›› Issue (8): 2803-2812.doi: 10.19799/j.cnki.2095-4239.2024.0216

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

Analysis of thermal runaway propagation and explosion risk of a large battery module for energy storage

Ye CHEN1,2,3(), Jin LI1,2,3, Houfu WU4, Shaoyu ZHANG1,2,3, Yuxi CHU1,2,3, Ping ZHUO1,2,3()   

  1. 1.Tianjin Fire Research Institute of Emergency Management Department
    2.Key Laboratory of Fire Protection Technology for Industry and Public Building, Ministry of Emergency Management
    3.Tianjin Key Laboratory of Fire Safety Technology, Tianjin 300381, China
    4.Guangzhou Great Power Energy & Technology Company Limited, Guangzhou 511400, Guangdong, China
  • Received:2024-03-14 Revised:2024-04-09 Online:2024-08-28 Published:2024-08-15
  • Contact: Ping ZHUO E-mail:chenye@tfri.com.cn;zhuoping@tfri.com.cn

Abstract:

Fires and explosions of energy storage systems caused by the thermal runaway (TR) of lithium-ion batteries restricts the their use in the industry. A 280 Ah lithium-ion battery and 1P48S battery module were used as research objects to investigate the propagation behavior of the TR and the explosion risk of large batteries and battery modules used for energy storage in real-life scenarios. Moreover, experimental studies were conducted on the heat and gas production characteristics of battery cells, as well as the TR propagation characteristics of the module under the condition of thermal abuse. Based on the gas production results, the explosion risk in two typical energy storage application scenarios caused by TR propagation within the module was analyzed. The results show that the maximum temperature of the cell caused by the TR was 380.1 ℃, the total gas volume during TR was 156.8 L, and the explosion limit of the mixed gas was 6.9%—35.5%. The heat insulation plate installed inside the module effectively inhibited the TR propagation, six battery cells without heat insulation plates experienced TR, the highest surface temperature of battery cells exceeded 1200 ℃, and the TR propagation speed was in the range 0.162—0.233 mm/s, meanwhile the upper surface temperature of the module box reached 281.3 ℃. Six cells that experience TR in the module will lead to a high explosion risk in a container-type energy storage system; thus, the TR propagation should be controlled within two cells, but the process from venting to the TR of one cell in the module will lead to a high explosion risk in the energy storage cabin for commercial and industrial use. This research can provide a guide for the safe design of battery modules and explosion-proof design of an energy storage system.

Key words: electrochemical energy storage, battery module, thermal runway propagation, explosion risk

CLC Number: