双相流细水雾抑制锂离子电池热失控蔓延试验研究.

To suppress the thermal runaway (TR) and its propagation in lithium‑ion batteries, a nitrogen and water mist (NWM) biphasic flow system is constructed. By changing the pressure and duration of the system, comparing the surface temperature and the volume fraction of flue gas emitted from the batteries, and analyzing the cooling power of NWM and the heat accumulation in the battery module, the mechanism and effectiveness of NWM system in suppressing TR propagation in the lithium‑ion battery module are studied. The results show that under the synergistic effect of NWM cooling the battery module surface and the suffocation mechanism, duration of the jet fire of the battery module is significantly reduced. Moreover, higher NWM pressure and longer duration of the system leads to lower peak temperature on the battery surface, and time intervals for TR propagation between adjacent batteries increases, demonstrating a significantly enhanced effectiveness of NWM in suppressing the propagation of TR in lithium‑ion batteries. [ABSTRACT FROM AUTHOR]