Lithium ion battery cell adhesive-sticking method

Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a lithium ion battery cell adhesive-bonding method which comprises the following steps: 1) selecting gummed paper with the width greater than that of a battery cell, wherein the gummed paper comprises an adhesive film and a release film which are bonded with each other; 2) carrying out double-sided rolling of the gummed paper; 3) attaching one end of the gummed paper to a battery cell, and rolling the surface of the gummed paper to transfer an adhesive film to the surface of the battery cell; and 4) separating the release film to finish lithium ion battery adhesive-bonding. The width of the gummed paper is greater than that of the battery cell, so that the release film of the gummed paper can be separated by subsequent equipment favourably, manual film tearing is not needed, the excellent rate of gluing is improved, and the labor cost is greatly reduced. Due to the fact that the surface of the battery cell is the curved surface, the adhesive film is attached to the battery cell when the upper surface of the gummed paper is rolled, it is guaranteed that the gummed paper makes contact with the battery cell from line to surface, wrinkling, bubbling and other defects can be avoided during large-area gluing, the reject ratio and the rework rate of the battery cell gluing procedure are greatly reduced, and production efficiency can be improved favourably.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a method for pasting lithium-ion batteries with glue. Background technique [0002] Nowadays, all countries are vigorously developing green and high-efficiency secondary batteries. As a new type of secondary battery, lithium-ion batteries have many excellent properties such as small size, high energy density, long cycle life, and convenient use. The application of rechargeable lithium-ion batteries in consumer electronics continues to expand and is widely accepted by consumers. Welcome has become our daily necessity. [0003] With the widespread use of polymer lithium-ion batteries in daily life, such as laptops, mobile phones, charging treasures and other electronic products, there are problems of fire and explosion caused by accidental drops during use. It is a very core index to evaluate the safety performance of lithium-ion batteries. [0004] Wit...

AI Technical Summary

Problems solved by technology

However, with high energy density, high-voltage system electrolyte, increased demand for high capacity, and strict processing performance requirements, hot-melt double-sided adhesives have exposed many short-board problems such as too thick, not suitable for new electrolytes, and incompatible Various types of electrolytes lead to a series of problems such as viscosity degradation, glue area limitation, processing bubbles, wrinkles, and finished battery bubbles, which in turn affect battery safety performance, enterprise production capacity and brand, and bring a hidden danger to the industry.

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