Energy storage station fire extinguishing system and fire extinguishing and cooling method thereof

Abstract

The invention relates to the technical field of fire fighting equipment safety, in particular to an energy storage station fire fighting system and a fire extinguishing and cooling method thereof.The energy storage station fire fighting system comprises an energy storage station, a liquid nitrogen fire extinguishing system arranged on the energy storage station and a spraying device connected with the liquid nitrogen fire extinguishing system; the liquid nitrogen fire extinguishing system comprises a frame, a controller assembly mounted on the frame, a liquid nitrogen tank, a refrigerating machine mounted on the liquid nitrogen tank, a reversing valve and a driving gas cylinder for pressurizing the liquid nitrogen tank; and a smoke temperature detector connected with the liquid nitrogen fire extinguishing system is arranged in the energy storage station. Liquid nitrogen is adopted as a fire extinguishing agent, the storage batteries placed in the energy storage station can be effectively cooled, the possibility of fire disasters is reduced, and the liquid nitrogen fire extinguishing system can continuously release liquid nitrogen for cooling and fire extinguishing under the condition that the temperature change of the energy storage station is abnormal or open fire occurs; the liquid nitrogen fire extinguishing system is suitable for various types of energy storage power stations, such as a wind power generation scene and an instant high voltage charging and discharging scene, and has good fire extinguishing and cooling protection effects on the energy storage stations.

Description

technical field [0001] The invention relates to the technical field of fire-fighting equipment safety, in particular to a fire-fighting system of an energy storage station and a fire-fighting and cooling method thereof. Background technique [0002] As an energy carrier, energy storage battery has many advantages, but it still has some dangers, especially in the case of short-term charging and discharging, it generates a lot of heat, which is prone to thermal runaway and fire. Modern energy storage stations generally use a combination of a large number of energy storage batteries, and the batteries are closely arranged. If one of the batteries is thermally out of control, there is no good cooling measure. Even if the fire is extinguished, the residual temperature of the battery is still very high. , prone to re-ignition, and high temperature may cause thermal runaway of adjacent batteries, which will lead to the spread of thermal runaway of batteries in the prefabricated cab...

AI Technical Summary

Problems solved by technology

Although the gas fire extinguishing system can effectively extinguish the battery fire, the cooling effect is poor. The temperature of the energy storage battery is still high after the fire is extinguished, and the exothermic reaction inside the battery is still going on due to the high temperature that has not been dissipated in time. This may induce thermal runaway of the adjacent battery, and then spread the thermal runaway, causing a large-scale fire, and due to the thermal runaway of the battery and the subsequent internal reaction, a large amount of high-temperature combustible gas produced by the battery Failure to be treated effectively increases the risk of battery re-ignition

[0004] However, fire extinguishing and cooling systems suitable for box-type energy storage power stations are still rare, and cannot meet the safety requirements of prefabricated cabin-type energy storage stations.

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