安全

为探究搭载锂离子电池的电动自行车在多层居民楼内的潜在火灾风险，基于火灾动力学模拟器FDS软件对不同工况下的电动自行车火灾进行数值模拟，研究火灾中能见度、烟气温度和CO浓度等参数的动态变化，深入探讨火灾烟气的扩散特性。研究表明：电动自行车火灾发展迅速，在火灾初期，烟气浓度迅速上升；电池的充电状态并非决定电动自行车火灾严重程度的主要因素；在通风受限条件下，楼内温度与烟气积聚风险偏高，低楼层的危险程度更大。研究结果可为相关部门和电动车厂商等提供参考，协助其制定更有效的预防措施和应急处理方案，帮助人员在相似类型火灾中逃生。

In order to investigate the potential fire risks of electric bicycles equipped with lithium-ion batteries in multi-storey residential buildings, numerical simulations of electric bicycle fires under different operating conditions were performed by using the Fire Dynamics Simulator(FDS). The dynamic changes of parameters such as visibility, smoke temperature, and CO concentration during fires were investigated, and the diffusion characteristics of fire smoke were studied in detail. The research has shown that electric bicycle fires develop rapidly, with the smoke concentration increasing rapidly in the early stages of the fire; the battery charge status is not the main factor determining the severity of electric bicycle fires; under restricted ventilation conditions, the temperature and smoke accumulation risk inside the building are relatively high, and the danger level is greater on lower floors. The research results can be used as a reference for relevant departments and electric vehicle manufacturers, helping them to formulate more effective preventive measures and emergency response plans, and to help personnel escape in similar types of fires.