Packing method for adhesive tape at the bottom of lithium ion battery pole group

Abstract

The present invention discloses a lithium ion battery electrode set base rubber belt packing method which increases the product quality and is easy and practical. The method of the invention is executed according to the following procedures: firstly shearing the rubber belt with the length equal to the perimeter in the width direction of the electrode set; secondly the rubber belt is pasted to the base wide surface of the electrode set, the dimension of the rubber belt exposing from the bottom of the electrode set should be equal to the thickness of the electrode set; afterwards surrounding the rubber belt to the base of the electrode for a circumference and pasting, and in pasting the force exerting direction should be perpendicular to the wide surface of the electrode set; and finally kneading the rubber belt exposed from the two sides of the bottom of the electrode set together and no gap is remained. The method eliminates the corner generated in the original rubber belt packing method and at the same time eliminates the effect of the corner to the appearance of the electrode group, the method leads to small dimension change of the electrode group and facilitates the entering of electrode group into the casing.

Description

technical field [0001] The invention relates to a new implementation method in the assembly process of lithium-ion batteries, in particular to a wrapping method for the adhesive tape at the bottom of the lithium-ion battery pole group. Background technique [0002] Lithium-ion 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. Due to its superior characteristics, it has been widely used in the power supply of mobile phones, notebook computers, electric bicycles, electric vehicles, aerospace, and MP3, earphones and other electronic devices. [0003] The lithium-ion battery structure is composed of battery pole group, battery case, battery cover and other components. Among them, the battery core, referred to as the pole group (J / R), is the core part of the lithium-ion battery. It is composed of a positive electrode sheet, a diaphragm, and a negative electrode sheet, and the dia...

AI Technical Summary

Problems solved by technology

After the tape is wrapped, there are horns at the bottom of the rounded surface of the pole group. These horns not only affect the appearance of the pole group, but also increase the size of the pole group, making it difficult to put the pole group into the shell

[0006] 2. Incomplete tape sealing

Since the tape is cut in a rectangular shape, the tape on the rounded surface of the pole group is pasted by squeezing both sides of the tape to the rounded surface of the pole group, so that there are large holes at the corners of the tape, which may easily cause the pole group to enter The phenomenon of contusion by the battery case

[0007] 3. The sticking force of the tape on the rounded corner surface of the pole group is not enough

Since the tape pasted on the rounded corners of the pole group is pasted around the bottom edge, the top of the horn has a greater pulling force on the tape pasted on the rounded corners of the pole group, which may easily cause the tape on the rounded corners of the pole group to fall off

[0008] 4. Diaphragm eversion causes short circuit

Since the tape is pasted from the bottom up when wrapping the tape, it is easy to cause the diaphragm to turn up due to improper force, resulting in the hidden danger of positive and negative short circuit

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