An energy storage system, comprising: at least one battery pack, a control unit, and a flame detector, wherein the control unit is separately connected to the at least one battery pack and the flame detector; the at least one battery pack comprises: a fire. An energy storage system, comprising: at least one battery pack, a control unit, and a flame detector, wherein the control unit is separately connected to the at least one battery pack and the flame detector; the at least one battery pack comprises: a fire. PACK Level Energy Storage-Wanzn originated in Guangzhou and specializes in providing fire protection solutions. It has been working with modular mobile devices, power plants, commercial buildings, and energy enterprises for over a decade. Set a composite fire warning detector in a single pack to prevent fire caused by battery overheating, short circuit or other. National Fire and Rescue Bureau: Multi-party collaborative innovation, fire detection scheme, fine water mist fire extinguishing system and Pack level scheme are needed to meet the safety challenges of new energy sources. In terms of fire safety, it points out the general direction of "early detection and accurate fire extinguishing", and clearly states that battery rooms/cabins. The invention belongs to the technical field of energy storage lithium battery fire extinguishing, in particular to an air-cooled energy storage lithium battery cluster-level local application PACK accurate fire extinguishing system and a method, which comprises a perfluoro-hexanone fire. tems 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 of heat and fire,it will cause serious damage.