Single-surface adhesive tape for lithium battery and preparation method for single-surface adhesive tape

Abstract

The invention relates to a single-surface adhesive tape for a lithium battery. The single-surface adhesive tape comprises a sealing hot-melt pressure-sensitive adhesive layer and a base film layer, wherein the sealing hot-melt pressure-sensitive adhesive layer and the base film layer are connected with each other. The single-surface adhesive tape is high in adhesiveness, can resist corrosion of electrolyte of the lithium battery without generating chemical reaction with the electrolyte in the lithium battery, and keeps the performance of the lithium battery and the quality of the lithium battery. When the single-surface adhesive tape is used, the adhesive surface is attached to a pole group, and the pole group is wrapped by an external packaging material; furthermore, the relative position between the pole group and the external packaging material is adjusted, and the lithium battery is heated and pressurized; glue can overflow out of the two side surfaces of the single-surface adhesive tape to adhere the pole group and the external packaging material, so that the single-surface adhesive tape is convenient to use and meets the requirement of the production technology of the lithium battery; the pole group of the lithium battery and the external packaging material can be fixed by the single-surface adhesive tape and are firmly adhered, so that no relative displacement is generated; the single-surface adhesive tape is high in anti-falling capacity, high in safety, long in service life and stale in quality.

Description

technical field [0001] The invention relates to the technical field of adhesive supplies, in particular to a single-sided adhesive tape for lithium batteries and a preparation method thereof. Background technique [0002] Due to its high energy density, lithium batteries can be recycled many times, have a long life and low pollution, and are widely used in mobile phones, notebooks and other fields. With the improvement of science and technology, the requirements for lithium batteries in various fields are getting higher and higher, among which high requirements are put forward for the anti-drop performance of lithium batteries, which determines the stability and safety of lithium batteries. The anti-drop performance of lithium batteries is mainly determined by the adhesion between the electrode group and the outer packaging material. If the adhesion between the battery electrode group and the outer packaging material is not good, when the battery moves horizontally or vertic...

AI Technical Summary

Problems solved by technology

[0003] At present, there is no fixing between the electrode group and the outer packaging material of the lithium battery, and the relative displacement between the electrode group and the outer packaging material is prone to occur, poor drop resistance, low safety, short service life, and unstable quality

[0004] The reason why there is no tape or glue between the electrode group and the outer packaging material is because the components in the existing tape or glue will chemically react with the electrolyte in the lithium battery, thereby affecting the performance of the lithium battery

[0005] In addition, if you want to bond the pole group and the outer packaging material, you usually need to use double-sided tape, and when you use double-sided tape, the bonding position of the pole group and the outer packaging material will be fixed by the double-sided tape, and you can no longer The position of the electrode group and the outer packaging material is adjusted, thereby affecting the appearance and performance of the lithium battery, which does not meet the production process requirements of the lithium battery, and there is a need for improvement

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