Acoustic low-pressure water mist fire extinguishing device for lithium ion power battery box of electric motor coach

Abstract

The invention discloses an acoustic low-pressure water mist fire extinguishing device for a lithium ion power battery box of an electric motor coach. The device comprises a gas storage bottle, a pressure reducing valve, a water storage bottle, partition control valves, a low-pressure water mist spray head, a connecting pipeline and a pipe fitting. A container valve and an electromagnetic driving device are mounted at a gas port of the gas storage bottle, and the pressure reducing valve is connected to the container valve; an output gas pipe of the pressure reducing valve is connected to a three-way pipe fitting, one end of split gas is connected to a bottle valve through a first gas delivery pipe, the bottle valve is connected to a second partition control valve through a water conveying pipe, and a spray head conveying hose is connected to the second partition control valve and the low-pressure water mist spray head; the other end of the split gas is connected to a first partition control valve through a second gas delivery pipe, then connected to a spray head gas delivery pipe and then connected to the low-pressure water mist spray head; and the low-pressure water mist spray head is fixed on a shell of a lithium battery box. Compared with an existing water mist spray head, the specific surface area of water mist is increased by millions of times, the water mist is instantly vaporized when encountering flames, and rapid and accurate fire extinguishing, efficient cooling, cleanness, energy conservation and after-combustion resistance can be achieved.

Description

technical field [0001] The invention belongs to the technical field of fire extinguishing devices, and in particular relates to an acoustic low-pressure fine water mist fire extinguishing device for a lithium-ion power battery box of an electric passenger car. Background technique [0002] Since 2012, new energy vehicle product technology has continued to break through and mature, and the sales of new energy vehicles have risen sharply. However, automobile safety accidents are facing a situation of doubling. According to statistics, in 2016, there were 29 fire accidents involving new energy vehicles in China, with a total of 40 vehicles, of which the accident rate of new energy passenger vehicles and special vehicles reached 97%. The relevant ratio is about 50PPM. According to this ratio, it is estimated that when the number of new energy vehicles reaches 5 million by 2020, there will be 250 fire accidents. Judging from the consequences of various fire accidents that have...

AI Technical Summary

Problems solved by technology

For example, in terms of functional safety, the battery system management is not perfect and cannot be monitored and alarmed for failures in advance, which will lead to battery overcharge, short circuit, liquid leakage, and eventually cause thermal runaway, spontaneous combustion, and fire

[0004] Chinese patent application "A special gas fire extinguishing device for lithium-ion battery box and fire extinguishing realization method" (publication number CN107320871A), the fire extinguishing agent of this application is a chemical fire extinguishing agent, and the fire extinguishing mechanism is mainly that when the fire extinguishing agent is sprayed, a large amount of heat is absorbed, and the temperature is reduced To achieve the purpose of fire extinguishing, the effect of rapid and accurate fire extinguishing cannot be achieved

[0010] But so far, the lithium battery acoustic low-pressure water mist fire extinguishing device for passenger cars is still a blank

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