储能模组内多孔防火材料增强液氮灭火效能研究OA北大核心CSTPCD

The frequent fire incidents involving lithium-ion batteries have significantly impacted the application of distributed energy storage lithium battery packs.Effective fire suppression measures,such as deep cooling and sustained temperature reduction,are critical for mitigating these risks.This study investigates the impact of incorporating porous fire-retardant materials on the efficiency of liquid nitrogen in extinguishing fires within energy storage modules.An experimental system was developed to test the extinguishing performance of liquid nitrogen when combined with various porous fire-retardant materials,including glass wool,nano aerogel,aluminum silicate ceramic fiber,and fire-retardant sponge.Experimental results demonstrate that under the same amount of liquid nitrogen,the incorporation of these materials within the module effectively enhances the extinguishing efficiency.Notably,when combined with nano aerogel,the surface temperature rise of batteries in thermal runaway situations is reduced to 28℃,63℃ lower than when using liquid nitrogen alone.Similarly,other materials also reduce temperature rise compared to liquid nitrogen alone.Additionally,the placement of these materials significantly affects their performance;deploying them on the side walls of the module is more effective in extinguishing fires than bottom deployment.These findings provide insights into improving fire extinguishing technologies for lithium battery systems in energy storage applications.