Explosion-proof battery

Abstract

The invention particularly relates to an explosion-proof battery, and belongs to the technical field of battery explosion prevention. The battery comprises a box body and a plurality of battery modules, the plurality of battery modules are arranged in the box body, gaps between the box body and the plurality of battery modules are filled with active gas, and the raw material of the box body comprises a carborane-containing compound. When the battery modules arranged in the box body severely release heat, as the raw material of the box body is the carborane composite material, carbosilane in the box body reacts with the active gas to generate ceramic substances, so that the box body is ceramized, the heat release and combustion of the battery module are effectively blocked. The technical prejudice of explosion prevention and flame retardance of the battery at present is overcome, and a new thought of explosion prevention and flame retardance of the battery is provided.

Description

technical field [0001] The invention belongs to the field of battery explosion-proof technology, and in particular relates to an explosion-proof battery. Background technique [0002] At present, the commonly used batteries on the market mainly include lithium iron phosphate batteries and ternary lithium batteries, namely square batteries and cylindrical batteries. Due to the higher energy density of ternary lithium batteries, higher mileage can be achieved. Existing electric vehicles Most use ternary lithium batteries. However, the ternary lithium battery is composed of hundreds of small cylindrical batteries in series, and each small battery may fail. [0003] The explosion of the battery is mainly caused by long-term overcharging of the battery cell or the external physical pressure of the battery. In the event of an explosion, the temperature can reach up to 70 to 800 degrees, and the box body is directly melted. At the same time, the shock wave generated by the explos...

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Problems solved by technology

However, the applicant found that this solution ignores the heat energy carried by the shock wave. When the heat energy is brought to the outside of the box, due to the release of chemical energy, the energy is extremely high, which will cause other peripheral parts of the battery box to fail due to heat, and then burn. Although there is no Explosion, but still unable to prevent the car from igniting rapidly

[0006] Therefore, the improvements made to the explosion-proof battery box in the prior art cannot effectively control the explosion shock wave, and cannot control the problem of the outward release of heat generated by the explosion.

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