Abstract: Fire accidents occur frequently in energy storage power stations, and their fire safety problems are becoming increasingly prominent. To verify the suppression performance of pack level and full submergednce level perfluorohexanone extinguishing systems on liquid-cooled lithium iron phosphate energy storage prefabricated chamber fires (i.e., fires spreading outside the battery box), a reliable perfluorohexanone fire suppression device for liquid-cooled lithium iron phosphate energy storage prefabricated cabin was designed. A fire model was established based on the actual size of the energy storage cabinet and prefabricated cabin, and analysis was conducted to determine the suppression effect of pack level and full submergence level perfluorohexanone fire suppression device on liquid-cooled lithium iron phosphate energy storage prefabricated cabin fires. The results showed that both these suppression devices could extinguish open flames within 8 seconds after injection, without reignition for up to 30 minutes.

Key words: perfluorohexanone, liquid-cooled lithium iron phosphate energy storage prefabricated cabin, fire suppression devices, pack level spray, full submergence level spray