Explosionproof and flame-retardant structure of lithium battery

Abstract

An explosionproof and flame-retardant structure of a lithium battery comprises a shell and a surface cover, wherein accommodating cavities are formed in the shell, a plurality of lithium battery packs are arranged in the accommodating cavities and are connected with an electrode, the electrode is arranged on the surface cover, the explosionproof and flame-retardant structure is characterized in that fire extinguishing layers are arranged between the accommodating cavities and the lithium battery packs, each fire extinguishing layer comprises a low-melting-point isolation bag and a fluid flame retardant, and the fluid flame retardant is arranged in the low-melting-point isolation bag. The explosionproof and flame-retardant structure has the beneficial effects that 1, the explosionproof and flame-retardant structure is simple and is low in production cost, and the market competitiveness is improved; 2, the lithium battery is wrapped by fire extinguishing agents internally arranged in the low-melting-point isolation bags, the isolation bags are molten at a high temperature when the lithium battery is heated and combusted, so that effects of temperature reduction and electrolyte dilution can be achieved by the flame retardants in the isolation bags, the lithium battery is prevented from being on fire and combustion even an explosionproof accident is prevented, and the application safety of the battery is improved; and 3, with regard to batteries having different parameters, the positions and the numbers of the fire extinguishing layers can be correspondingly adjusted, and the explosionproof and flame-retardant structure is adaptive to different occasions to the greatest extent.

Description

technical field [0001] The invention relates to a lithium battery, in particular to an explosion-proof and flame-retardant structure of the lithium battery. Background technique [0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. With the rapid development of industries such as mobile phones, notebook computers, digital cameras, electric vehicles, electric tools, and new energy vehicles, the demand for lithium batteries will continue to grow. The demand for lithium batteries will continue to grow. Lithium batteries have the advantages of relatively high energy, long service life, light weight and low self-discharge rate. In order to reduce the impact of the external environment, lithium battery packs are usually placed in a relatively closed environment. These conditions of use will prevent the large amount of heat generated by the lithium battery pack from b...

AI Technical Summary

Problems solved by technology

These conditions of use will prevent the large amount of heat generated by the lithium battery pack from being discharged smoothly and quickly, resulting in a sharp rise in the temperature of the lithium battery. Working at a higher temperature for a long time will shorten the service life of the battery and reduce the performance of the battery. ;The long-term uneven distribution of the temperature field in the battery box will cause the performance imbalance of each lithium battery module and monomer, and then affect the performance of the entire battery system

Lithium batteries have poor safety, there is a danger of explosion, and the use of high and low temperature is dangerous

Images