The Efficiency of Heptafluoropropane Fire Extinguishing Agent on Suppressing the Lithium Titanate Battery Fire

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• 作者：Qingsong Wang ; Guangzheng Shao ; Qiangling Duan ; Man Chen ; Yongqi Li…
• 关键词：Lithium titanate battery ; Thermal runaway ; Heptafluoropropane ; Fire extinguishing agent
• 刊名：Fire Technology
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：52
• 期：2
• 页码：387-396
• 全文大小：1,341 KB
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• 作者单位：Qingsong Wang (1)
  Guangzheng Shao (1)
  Qiangling Duan (1)
  Man Chen (2)
  Yongqi Li (2)
  Ke Wu (2)
  Bangjin Liu (2)
  Peng Peng (2)
  Jinhua Sun (1)
  
  1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, China
  2. China Southern Power Grid Power Generation Company, Guangzhou, 511400, China
  
• 刊物类别：Engineering
• 刊物主题：Civil Engineering
  Mechanics
  Characterization and Evaluation Materials
  Physics
  
• 出版者：Springer Netherlands
• ISSN：1572-8099

文摘

To investigate the efficiency of heptafluoropropane fire extinguishing agent on suppressing the lithium titanate battery fire, an experimental system was designed and built to perform the extinguishing test. The lithium titanate battery (50 Ah, 2.3 V) with diameter of 66 mm and length of 260 mm was used. A 5 kW electric heater was set under the battery to trigger the thermal runaway of the battery. When the battery fire occurs, the heptafluoropropane was immediately discharged by opening the agent storage tank till to the fire was extinguished. The battery temperatures, ignition time, release time of the agent, time to extinguish the fire, battery mass loss, amount of used agent and mean discharge rate of agent were obtained and analysed. The results illustrate that the single cell or small-scale battery pack fire can be extinguished by heptafluoropropane in the tests. Therefore, heptafluoropropane is a fire extinguishing agent candidate to put down the lithium titanate battery fire. However, due to the violent reactions still ongoing inner the cell and flammable gases ejecting continuously from the cell, the battery may be reignited after it is put down. So it was suggested that the heptafluoropropane agent should be applied as early as possible and with longer spray time than the usual case to avoid the reignition.