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Experimental study on combustion behavior and fire extinguishing of lithium iron phosphate battery

机译：锂铁磷酸盐电池燃烧行为和灭火的实验研究

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摘要

The fire hazard resulting from the thermal runaway (TR) of lithium-ion batteries (LIBs) poses a great threat, but it is still a challenge to extinguish LIB fires effectively and promptly. In this work, an experimental platform is constructed to investigate the combustion behavior and toxicity of lithium iron phosphate battery with different states of charge (SOCs) and suppression efficiency of dry powder in LIB fires. The results indicate that the fully-charged battery undergoes TR when its surface temperature reaches at 166.8 degrees C and releases combustible gases such as CO, CO2 and HF. The LIB has the greater thermal risk and toxicity with the higher SOC value. The maximum heat release rate reaches 12.1 kW and the normalized HRR value is 6.2 MW m(-2). It is found that dry powder could extinguish LIB fires under the given appreciate conditions. The suppression and cooling effects become better with the shorter spraying distance and the longer spraying time, but the effects are not affected by the spraying angle. However, this agent couldn't prevent the exothermic reaction inside the battery, thus it has a limited cooling effect only on the parts of the agent contacted.
机译：由锂离子电池（LIBS）的热失控（TR）产生的火灾危害构成了巨大的威胁，但熄灭Lib有效且及时仍然是一项挑战。在这项工作中，构建了一种实验平台，以研究利用Lib火灾中具有不同电荷（SOC）和干粉的抑制效率的锂铁磷酸盐电池的燃烧行为和毒性。结果表明，当其表面温度达到166.8℃并释放可燃气体，如CO，CO2和HF等可燃气体时，齐全的电池经历TR。 LIB具有更高的SOC值的热风险和毒性。最大热释放速率达到12.1kW，归一化的HRR值为6.2 mw m（-2）。发现干粉可以在给定的欣赏条件下灭火。抑制和冷却效果随着较短的喷射距离和喷雾时间越长而变得更好，但效果不受喷射角度的影响。然而，该试剂不能防止电池内部的放热反应，因此它仅在代理的部件接触的情况下具有有限的冷却效果。

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  • 来源
    《Journal of Energy Storage》 |2020年第8期|101532.1-101532.14|共14页
  • 作者

    Meng Xiangdong; Yang Kai; Zhang Mingjie; Gao Fei; Liu Yujun; Duan Qiangling; Wang Qingsong;

  • 作者单位

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

    China Elect Power Res Inst State Key Lab Operat & Control Renewable Energy & Beijing 100192 Peoples R China;

    China Elect Power Res Inst State Key Lab Operat & Control Renewable Energy & Beijing 100192 Peoples R China;

    China Elect Power Res Inst State Key Lab Operat & Control Renewable Energy & Beijing 100192 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;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lithium ion battery safety; Thermal runaway; Heat release rate; Dry powder; Fire suppression;

    机译：锂离子电池安全;热失控;热释放率;干粉;防火抑制;

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