(Summary description)With the rapid increase in the number of new energy vehicles in my country, safety issues have become increasingly prominent. The power lithium battery is prone to smoke, fire or even explosion in the case of overcharging or collision, and these are the faults of the wild horse of thermal runaway. The causes of thermal runaway include mechanical and electrical causes (battery collision squeeze, acupuncture, etc.) and electrochemical causes (battery overcharge and overdischarge, fast charging, low temperature charging, self-initiated internal short circuit, etc.). When a battery cell suffers from thermal runaway, the adjacent cells also suffer thermal runaway after being affected, which leads to the spread of thermal runaway, and ultimately leads to safety accidents. In order to solve the safety problem of power battery thermal runaway, PUW has focused on the research and development of battery pack explosion-proof valves, power battery safety valves, and low-pressure battery pack quick pressure relief and exhaust valves for many years. Dust, flame retardant and other issues. Improve the reliability, safety and stability of the battery pack. PUW quick pressure relief exhaust valve has the following characteristics: Air permeability before blasting: ≥600ml/min@1.5Kpa (air permeability under normal conditions) Ventilation rate after blasting: ≥1000L/min@10Kpa (ventilation rate after reaching explosion-proof pressure) Explosion-proof pressure (customizable): 3±1Kpa Can be divided into low pressure blasting (3~5Kpa), medium pressure blasting (10~20Kpa), high pressure blasting (above 30Kpa) Temperature resistance range: -40～150 Product specifications: PBA4K-50 Flame retardant rating: UL 94-V0 Protection level: IP68 (1 meter water depth for 48 hours), IP6K9K Basic functions: pressure balance, waterproof, breathable and explosion-proof, pressure relief and exhaust (air pressure balance inside and outside the battery pack)