A battery fire extinguisher that uses hexafluoropropane and carbon dioxide to extinguish fires

Abstract

The invention discloses a battery fire extinguisher achieving fire extinguishment with hexafluoropropane and carbon dioxide. The battery fire extinguisher comprises a fire extinguishment bottle installed outside a battery box, wherein a vehicle-mounted battery is fixedly arranged in the battery box, a spray pipe of the fire extinguishment bottle is arranged in the battery box, the fire extinguishment bottle is filled with fire extinguishment materials which are intermixtures formed by the hexafluoropropane and the carbon dioxide, both the hexafluoropropane and the carbon dioxide are of a liquid state, the hexafluoropropane accounts for 15%-18% of the intermixtures (by volume), and the balance is the carbon dioxide. The battery fire extinguisher has the advantages of being capable of conducting physical fire extinguishment and chemical fire extinguishment simultaneously.

Description

technical field [0001] The invention belongs to the technical field of fire extinguishing devices, in particular to a battery fire extinguisher which uses hexafluoropropane and carbon dioxide to extinguish fire. 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] Existing fire extinguishers use carbon dioxide as a fire extinguishing material, and some use hexafluoropropane as a fire extinguishing material, but there is no fire extinguisher that uses carbon dioxide and hexafluoropropane a...

AI Technical Summary

Problems solved by technology

[0003] Existing fire extinguishers use carbon dioxide as a fire extinguishing material, and some use hexafluoropropane as a fire extinguishing material, but there is no fire extinguisher that uses a mixture of carbon dioxide and hexafluoropropane as a fire extinguishing material at the same time.

A fire extinguisher using pure carbon dioxide as a fire extinguishing material has a high spray rate and a good cooling effect, and can achieve a good physical cooling effect, but has no chemical cooling function. A fire extinguisher using pure hexafluoropropane as a fire extinguishing material is contrary to a pure carbon dioxide fire extinguisher. Fluoropropane has good heat resistance, low spray speed, and low requirements on the nozzle, but the price is relatively high, mainly for chemical cooling, and the cooling ability is lacking

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