Essentials on Containerized BESS Fire Safety
ATESS energy storage containers primarily utilize HFC-227ea (heptafluoropropane) for fire suppression, ensuring optimal fire
With the advantages of high energy density, short response time and low economic cost, utility-scale lithium-ion battery energy storage systems are built and installed around the world. However, due to the thermal runaway characteristics of lithium-ion batteries, much more attention is attracted to the fire safety of battery energy storage systems.
However, the area of fire extinguishing agent attached to the battery surface is small, and the cooling effect is insufficient. Fire extinguishing agent immersion suppression is also a new method of battery thermal runaway suppression. The battery module is immersed in some media (silicone oil, HFE_7100 and water) .
Based on the understanding of fire extinguishing mechanism, new fire extinguishing agents have been developed for battery fires, such as hydrogel fire extinguishing agents and liquid nitrogen fire extinguishing agents.
At the same time, to improve the utilization efficiency of the fire extinguishing agent and enhance the cooling effect, Zhang et al. proposed an intermittent spray method for battery TR cooling. As the duty cycle decreases, the cooling effect increases first and then decreases.
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