Anti-shrinkage lithium battery diaphragm

Abstract

The invention discloses an anti-shrinkage lithium battery diaphragm, which comprises a substrate diaphragm, ceramic coating layers, flame retardant layers, anti-corrosion layers and heat insulation layers, wherein the flame retardant layers are respectively arranged at the two sides of the substrate diaphragm; the heat insulation layers are arranged at the outer sides of the flame retardant layers; the anti-corrosion layers are arranged at the outer sides of the heat insulation layer; the ceramic coating layers are arranged at the outer sides of the anticorrosion layers; trapezoidal bulges arerespectively arranged at the upper and lower surfaces of the substrate diaphragm; trapezoidal grooves are formed in positions corresponding to one side, in contact with the substrate diaphragm, of the flame-retardant layers; the substrate diaphragm is a PEPP composite diaphragm; the flame-retardant layers are polyamide resin layers; the heat insulation layers are aerogel felt layers; the anticorrosion layers are urea-formaldehyde melamine resin layers. Generally, the anti-shrinkage lithium battery diaphragm has the advantages of shrinkage resistance, heat resistance, high safety and high wetting capability on electrolyte; the circulation life of a battery can be prolonged when the anti-shrinkage lithium battery diaphragm is applied to a lithium battery.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, in particular to an anti-shrinkage lithium battery diaphragm. Background technique [0002] With the continuous advancement of modern science and technology, the use of electronic equipment is very common. The current electronic equipment basically stores electric energy through lithium batteries to provide power for electronic equipment. In the structure of lithium batteries, the diaphragm is one of the key inner components. The performance of the diaphragm determines the interface structure, internal resistance, etc. of the battery, which directly affects the capacity, cycle and safety performance of the battery. A diaphragm with excellent performance is beneficial to improve The overall performance of the battery plays an important role. The diaphragm design in the prior art is often due to immature technology. When the lithium battery is used for a long time, the temperature inside...

AI Technical Summary

Problems solved by technology

The diaphragm design in the prior art is often due to immature technology. When the lithium battery is used for a long time, the temperature inside the lithium battery will rise sharply, and the current diaphragm will shrink when the temperature is high, so that the diaphragm will be lost. The isolation effect makes the lithium battery prone to short circuit, which may cause the lithium battery to explode

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