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

机译：七氟丙烷灭火剂对钛酸锂电池灭火的抑制作用

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摘要

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.
机译：为了研究七氟丙烷灭火剂对钛酸锂电池灭火的抑制作用，设计并建立了一个实验系统进行灭火试验。使用直径为66 mm，长度为260 mm的钛酸锂电池（50 Ah，2.3 V）。在电池下方设置了一个5 kW的电加热器，以触发电池的热失控。当发生电池着火时，通过打开试剂储罐直至熄灭，立即将七氟丙烷排出。得到并分析了电池温度，着火时间，灭火剂释放时间，灭火时间，电池质量损失，灭火剂使用量和灭火剂平均排出率。结果表明，在测试中，七氟丙烷可以扑灭单节电池或小型电池组的火灾。因此，七氟丙烷是用于扑灭钛酸锂电池着火的灭火剂。但是，由于电池内部仍在发生剧烈反应，并且不断有可燃气体从电池中喷出，放下电池后可能会重新点燃。因此，建议应尽早使用七氟丙烷剂，并且喷洒时间要比通常情况下更长，以避免重燃。

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  • 来源
    《Fire Technology》 |2016年第2期|387-396|共10页
  • 作者

    Wang Qingsong; Shao Guangzheng; Duan Qiangling; Sun Jinhua; Chen Man; Li Yongqi; Wu Ke; Liu Bangjin; Peng Peng;

  • 作者单位

    Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Peoples R China;

    Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Peoples R China;

    Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Peoples R China;

    Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Peoples R China;

    China Southern Power Grid Power Generat Co, Guangzhou 511400, Guangdong, Peoples R China;

    China Southern Power Grid Power Generat Co, Guangzhou 511400, Guangdong, Peoples R China;

    China Southern Power Grid Power Generat Co, Guangzhou 511400, Guangdong, Peoples R China;

    China Southern Power Grid Power Generat Co, Guangzhou 511400, Guangdong, Peoples R China;

    China Southern Power Grid Power Generat Co, Guangzhou 511400, Guangdong, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lithium titanate battery; Thermal runaway; Heptafluoropropane; Fire extinguishing agent;

    机译：钛酸锂电池;热失控;七氟丙烷;灭火剂;

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