Fire extinguishing and cooling system of prefabricated cabin type electrochemical energy storage station based on liquid nitrogen

Abstract

The invention provides a fire extinguishing and cooling system of a prefabricated cabin type electrochemical energy storage station based on liquid nitrogen. The system comprises a liquid nitrogen pump, a liquid nitrogen storage tank, a liquid nitrogen vacuum tube, an ultra-low temperature electromagnetic valve, a remote controller, a spray head, a pressure gauge and a hose, and a battery rack isfurther arranged in a prefabricated cabin. According to the system, the system is arranged in a prefabricated cabin, liquid nitrogen can be sprayed to batteries in the prefabricated cabin after fire is caused by thermal runaway of the lithium ion batteries, the liquid nitrogen is vaporized into nitrogen, the volume is rapidly expanded, the oxygen concentration around the batteries is reduced, flames cannot be maintained, and fire extinguishing is further realized. Meanwhile, liquid nitrogen vaporization can absorb a large amount of heat, after acting on the surfaces of the batteries, the surface temperature of the batteries is effectively reduced, the batteries are cooled, and thermal runaway propagation among the batteries is prevented. Finally, due to the fact that a large amount of nitrogen is accumulated in the prefabricated cabin, the concentration and the temperature of combustible gas generated due to the thermal runaway of the batteries are reduced, and the occurrence of reburning of the batteries is inhibited.

Description

technical field [0001] The invention belongs to the field of safety technology, and relates to the field of lithium ion battery fire suppression, in particular, it includes a liquid nitrogen-based prefabricated cabin type electrochemical energy storage station fire extinguishing and cooling system. Background technique [0002] In recent years, due to air pollution and the greenhouse effect, people have begun to reduce the use of fossil energy and prefer lithium-ion batteries with high energy density, long cycle life, and small self-discharge. More and more electrochemical energy storage power stations use lithium-ion batteries as energy storage carriers. In the future, the scale of prefabricated cabin electrochemical energy storage stations will be further expanded. Although lithium-ion battery has many advantages as a new energy source, it still has some dangers, especially in the case of abuse, it is prone to thermal runaway and fire. The batteries in the prefabricated ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems and make up for the deficiencies and defects such as the poor cooling effect of the gas fire extinguishing system, the present invention proposes a more efficient fire extinguishing and cooling system based on the characteristics of the battery fire in the prefabricated cabin of the electrochemical energy storage station. Fire extinguishing and cooling system of liquid nitrogen prefabricated cabin electrochemical energy storage station

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