Foamed aluminum composite explosion-proof structure, explosion-proof device and lithium battery

Abstract

The invention provides a foamed aluminum composite explosion-proof structure, an explosion-proof device and a lithium battery, the foamed aluminum composite explosion-proof structure comprises a bottom structure, a top structure and an explosion-proof layer, the explosion-proof layer is arranged between the bottom structure and the top structure, a protected object is arranged over the top structure, and the explosion-proof layer is arranged above the top structure. A cross beam is arranged between the protected objects, the explosion-proof layer is made of variable-density foamed aluminum with different thicknesses, and the thickness range and the density range of the explosion-proof layer are set according to the arrangement positions of the protected objects and the position of the cross beam. According to the foamed aluminum composite explosion-proof structure, the explosion-proof device and the lithium battery provided by the invention, the safety of the bottom of the battery is also improved while light weight is achieved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an aluminum foam composite explosion-proof structure, an explosion-proof device and a lithium battery. Background technique [0002] With the rapid development of electric vehicles in my country and even in the world, the current competition in the development of safety technology for new energy vehicles is very fierce, and the requirements for the safety performance of new energy vehicles are also getting higher and higher. [0003] The battery pack of a new energy vehicle is no longer a protected object in the vehicle. While improving its own safety performance, it needs to contribute its own strength to the body and even the vehicle. At the same time, it must also meet the requirements of high energy density, so taking into account high safety Safety and lightweight have become an urgent issue for battery packs. In the design of new energy battery packs, the safety and wei...

AI Technical Summary

Problems solved by technology

[0004] When the battery pack is subjected to working conditions such as collision, vibration and extrusion, it is very likely to be deformed or even damaged, causing fire or even explosion. Therefore, the strength and rigidity of the battery pack need to be improved. Under the high premise, how to prevent explosion, how to improve the safety of the bottom, and how to design a lightweight battery pack with excellent comprehensive performance are technical problems that need to be solved

[0005] Alloys, composite materials, die-casting aluminum, etc. are used in the existing technology to replace traditional steel, although the weight is reduced, but the cost is also increased

On the other hand, through structural optimization and de-modularization methods such as sheet metal thickness reduction, or by reducing material density, reducing thickness, reducing or removing some structural parts, and weakening part of the structure, although the purpose of weight reduction has been achieved, But at the same time, it also caused the performance of the battery to decline, resulting in poor overall performance of the whole package, let alone explosion-proof, and the effect of improving the safety of the bottom.

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