Scholarlink

<p>Addressing the challenges of fire prevention and control for battery electric vehicles in underground parking lot charging bays, as well as the performance limitations of traditional overhead spray systems, this paper investigates the evolution of vehicle fires caused by thermal runaway in ternary lithium batteries during charging scenarios through full-scale physical fire tests. It compares the fire suppression effectiveness of overhead spray systems with that of a combined overhead and floor spray system. The results indicate that traditional overhead spray systems have inherent prevention and control deficiencies. They exhibit a response delay of 137&#xa0;s relative to the first explosion, completely missing the 87-second early intervention window. Consequently, they fail to suppress the spread. During the test, the battery pack exploded three times, the vehicle body reached a maximum temperature of 820.4&#xa0;°C, and the maximum radiant heat flux intensity at the measurement point reached 0.58&#xa0;kW/m², ultimately igniting adjacent vehicles; The overhead spray + ground spray system achieved a 91.2% faster response time compared to the overhead spray system alone, enabling early intervention in thermal runaway. This rapidly reduced the battery pack pressure to atmospheric levels and maintained the vehicle body temperature below 60&#xa0;°C throughout the test—a 92.7% reduction in peak temperature compared to the overhead spray scenario—effectively suppressing the risks of chain explosions and fire spread. The study confirmed the floor spray system’s highly effective capability in preventing and controlling battery pack fires in the underbody, providing critical support for upgrading fire protection design and emergency response at charging stations.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Analysis on Fire Evolution Characteristics of Full-Size Pure Electric Vehicle Charging Berth Entities and Ground Extinguishing Efficacy

  • 期刊论文

  • 发表日期：

    2026年6月26日

查看全文
  • Hao Huang,
  • Feng Wu Shan,
  • Bin Bin Li,
  • Yi Fei Hu,
  • Chao Qun Shen,
  • Qing Mei Qin,
  • Xing Bing Duan,
  • Jianbang Zeng

摘要

Addressing the challenges of fire prevention and control for battery electric vehicles in underground parking lot charging bays, as well as the performance limitations of traditional overhead spray systems, this paper investigates the evolution of vehicle fires caused by thermal runaway in ternary lithium batteries during charging scenarios through full-scale physical fire tests. It compares the fire suppression effectiveness of overhead spray systems with that of a combined overhead and floor spray system. The results indicate that traditional overhead spray systems have inherent prevention and control deficiencies. They exhibit a response delay of 137 s relative to the first explosion, completely missing the 87-second early intervention window. Consequently, they fail to suppress the spread. During the test, the battery pack exploded three times, the vehicle body reached a maximum temperature of 820.4 °C, and the maximum radiant heat flux intensity at the measurement point reached 0.58 kW/m², ultimately igniting adjacent vehicles; The overhead spray + ground spray system achieved a 91.2% faster response time compared to the overhead spray system alone, enabling early intervention in thermal runaway. This rapidly reduced the battery pack pressure to atmospheric levels and maintained the vehicle body temperature below 60 °C throughout the test—a 92.7% reduction in peak temperature compared to the overhead spray scenario—effectively suppressing the risks of chain explosions and fire spread. The study confirmed the floor spray system’s highly effective capability in preventing and controlling battery pack fires in the underbody, providing critical support for upgrading fire protection design and emergency response at charging stations.