A kind of inert gas protection method when explosion-proof lithium battery power supply burns

Abstract

The invention relates to an inert gas protection method when an explosion-proof lithium battery power source is burned, and belongs to the technical field of mining lithium batteries. The technical solution is as follows: when the battery pack (10) burns and explodes, the battery pack is enclosed in an inert gas (9) filled with oxygen to reduce, eliminate or weaken the explosion intensity of the battery pack; the sealing liquid leaks in the sealed inert gas At the same time, the flame formed by the combustion and explosion of the battery pack is cooled. The beneficial effects of the invention are as follows: to ensure safe application in coal mines, use inert gas to isolate oxygen when lithium batteries catch fire and explode, reduce, eliminate or weaken the explosion intensity of battery packs, and seal liquid and flame arrester (fire arrester) to cool down the combustion flame of the battery Extinguish the flame, do not cause or induce the explosion of external explosives, meet the special requirements of mine explosion-proof equipment, and have great significance for the application of large-capacity lithium batteries in coal mines and explosive places.

Description

technical field [0001] The invention relates to an inert gas protection method when an explosion-proof lithium battery power source is burned, and belongs to the technical field of explosion-proof lithium batteries. Background technique [0002] Lithium batteries are prone to thermal runaway during use, especially during overcharge, overdischarge, extrusion and puncture, 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 that lithium battery electric vehicles are strictly prohibited from charging in the house and corridor. In the lithium battery electric vehicle industry, in order to prevent the battery pack box (shell) from exploding and hurting people, the battery pack box (shell) must be equipped with a ventilated explosion-proof pressure rel...

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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