Method for reducing surface friction of aluminum-plastic film and aluminum-plastic film prepared by the method

Abstract

The invention discloses a method for reducing the surface friction of an aluminum-plastic film and the aluminum-plastic film prepared by the method. The aluminum-plastic film consists of outer, middle and inner layers, the outer layer is a heat-resistant resin layer, the middle It is an aluminum foil layer and the inner layer is a heat-sealing layer. The heat-resistant resin layer, the aluminum foil layer and the heat-sealing layer material of the aluminum-plastic film are semi-finished products. The aluminum foil layer is an aluminum foil made by a surface treatment process; Coating adhesive between the layers is made into an aluminum-plastic film through lamination, baking, and standing, including the following steps: (1) Set the main lamination temperature to 60°C; (2) Put the compounded semi-finished product into 40 Bake in an oven at ~50°C, (3) leave the oven and let it stand for 1-3 days to obtain the finished aluminum-plastic film; make the produced aluminum-plastic film meet the quality technical requirements of high quality and low friction coefficient, and reduce the constant temperature and humidity The occurrence of stratification probability improves the safety of lithium battery use. It solves the problems of insufficient drawing depth, easily damaged shells and delamination at constant temperature and humidity when punching aluminum-plastic film shells. The service life of the soft pack lithium battery is extended.

Description

Technical field: [0001] The present invention relates to the technical field of lithium battery encapsulating aluminum plastic film, and more relates to a method of reducing a surface friction force for aluminum plastic film by a lithium battery and a lithium battery prepared using the method, particularly to a reduced aluminum. Method of surface friction of plastic film and the aluminum-plastic film prepared by the method thereof. Background technique: [0002] In recent years, due to the rapid development of new energy vehicles, the application of soft bag lithium batteries has grown sharply. With the rapid development of the power car, the buckle battery is increasing, and the soft boiled battery is better than that of other batteries, the safety performance is good, the weight is light, the internal resistance is small, and the design is flexible. The application research has become a research hotspot. As a packaging material of one of the key material of the soft bag lithium...

AI Technical Summary

Problems solved by technology

However, there are still deficiencies. If the existing production equipment needs to be modified, there are still some corresponding defects such as certain complexity in process technical parameters and raw material processing, which correspondingly improves the quality of aluminum-plastic films for lithium battery packaging. Cost of production

[0004] On the other hand, in the preparation process of the existing aluminum-plastic film, due to the improper design and control of the technical parameters of the preparation process of the aluminum-plastic film material, such as the pressing temperature between the layers of the material for preparing the aluminum-plastic film Control, and the control of the baking temperature are also inappropriate, such as the baking temperature is too high and the surface treatment of the material for preparing the aluminum-plastic film, and the spraying method of the adhesive, etc., all have certain defects, which makes the surface of the aluminum-plastic film The friction coefficient is high, so that the pitting depth of the aluminum-plastic film cannot meet the production requirements, which in turn affects the production and quality of lithium batteries

Due to the deficiencies in the preparation of the current technology, the products prepared by it are difficult to meet the high-quality standard requirements. Therefore, most of the aluminum-plastic films on the market currently rely on imports. How to improve the technical level of the preparation of aluminum-plastic film products, so that Make the domestic aluminum-plastic film reach or exceed the import level, and then produce more advanced, high-quality aluminum-plastic film products for lithium battery packaging materials with low friction coefficient