Fire extinguishing device for vehicle-mounted battery

Abstract

The invention discloses a fire extinguishing device for a vehicle-mounted battery. According to the fire extinguishing device for the vehicle-mounted battery, the vehicle-mounted battery is fixed in a battery box; a spray pipe device of a fire extinguishing tank is arranged in the battery box; the fire extinguishing device for the vehicle-mounted battery further comprises a fire extinguishing net structure; the fire extinguishing net structure comprises a fixing net and a plurality of fire extinguishing balls; the fire extinguishing balls are distributed on the fixing net, and the fixing net can cover the vehicle-mounted battery to enable the fire extinguishing balls to make contact with the vehicle-mounted battery; each fire extinguishing ball is composed of a shell capable of being heated and broken and a fire extinguishing agent wrapped in the shell; the fire extinguishing agent in each fire extinguishing ball is formed by mixing a perfluorohexanone solution with the molar concentration of more than 95% and indicating gas, wherein the perfluorohexanone solution accounts for 30%-70% by volume part, and the balance is the indicating gas; a detector capable of detecting the indicating gas is arranged in the battery box, and the detector is connected to a controller; the controller is connected to a switch valve of the fire extinguishing tank and controls the on-off states of the switch valve; and when the switch valve is switched on, a fire extinguishing material in the fire extinguishing tank is injected into the battery box through the spray pipe device.

Description

technical field [0001] The invention belongs to the technical field of fire extinguishing devices, in particular to a vehicle battery fire extinguishing device. Background technique [0002] Since the existing new energy vehicles all use lithium-ion batteries as the power system, and lithium-ion batteries have certain safety hazards during the operation of the vehicle, especially in the case of abuse, such as overcharging and over-discharging during the charging process Lithium-ion batteries are prone to safety accidents such as smoke, fire or even explosion under conditions such as extrusion, acupuncture, fire, etc. Therefore, the on-board battery will be equipped with a fire extinguisher. [0003] In order to achieve the function of automatic fire extinguishing, the existing fire extinguishing device will install temperature sensor, smoke sensor and combustible gas sensor and other structures in the battery box to sense whether the battery in the battery box is on fire, a...

AI Technical Summary

Problems solved by technology

However, sometimes the car will be in an environment with heavy smoke or flammable gas, and the battery box should be kept well ventilated. Smoke and flammable gas will flow through the battery box. At this time, the controller may make a misjudgment. When the tank is not on fire, it is judged as a fire, and then the fire extinguishing device is activated, causing unnecessary losses

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