Inert gas protection method during combustion of explosion-proof lithium battery power supply

Abstract

The invention relates to an inert gas protection method during combustion of an explosion-proof lithium battery power supply, and belongs to the technical field of mining lithium batteries. According to the technical scheme, when a battery pack (10) burns and explodes, the battery pack is sealed in full inert gas (9) and is in an oxygen isolation state, so that the explosion intensity of the battery pack is reduced, eliminated or weakened; the sealing liquid cools flames formed by combustion and explosion of the battery pack while sealing inert gas leakage. The inert gas protection method has the beneficial effects that underground coal mine safety application is guaranteed, when the lithium battery is on fire and explodes, inert gas is used for isolating oxygen, the explosion intensity of the battery pack is reduced, eliminated or weakened, the sealing liquid and the fire barrier (fire barrier grid) cool down and extinguish combustion flame of the battery, external explosive explosion is not caused or induced, and the special requirements of mining explosion-proof equipment are met; the method has great significance in application of high-capacity lithium batteries in underground coal mines and explosion places.

Description

technical field [0001] The invention relates to an inert gas protection method when an explosion-proof lithium battery power source burns, and belongs to the technical field of explosion-proof lithium batteries. Background technique [0002] During the use of lithium batteries, especially when they are overcharged, overdischarged, squeezed and punctured, thermal runaway is prone to occur, resulting in violent explosion and combustion of lithium batteries, which restricts the application range of lithium batteries. In the electric vehicle industry, in order to prevent lithium batteries from catching fire and exploding, the Ministry of Public Security expressly requires lithium battery electric vehicles to be strictly prohibited from being charged in houses and corridors. In the lithium battery electric vehicle industry, in order to prevent the battery box (shell) from exploding and hurting people, the battery box (shell) must be equipped with a ventilated explosion-proof pres...

AI Technical Summary

Problems solved by technology

However, when the explosion-proof enclosure is used for protection, the following problems are brought: the explosion-proof enclosure increases the weight of the power supply and reduces the energy-to-weight ratio of the power supply. Since the battery pack in the explosion-proof enclosure is not isolated from oxygen, when the lithium battery pack is overcharged and When combustion and explosion are caused by external factors such as external factors, the explosion intensity of the battery pack is relatively high. In addition to causing damage to the flameproof enclosure, it may also cause damage to surrounding equipment, causing safety accidents, preventing the advantages of lithium batteries from being brought into play, and failing to meet the requirements of mining insulation. Special requirements for explosive equipment

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