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Liquid state flexible package, polymer lithium battery diaphragm binding glue

A lithium battery separator and adhesive technology, applied in the field of adhesive, can solve the problems of affecting the appearance of the battery, the battery performance, the tightness of the battery, the uneven appearance of the battery, etc., achieving no thickness difference, good bonding effect, Inexpensive effect

Inactive Publication Date: 2006-06-14
SHENZHEN B&K TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using adhesive paper to fix, because the adhesive paper itself has a certain thickness, it will cause the appearance of the battery to be uneven and the thickness of the battery to be uneven. In addition, the introduction of adhesive paper will easily lead to large internal resistance and large self-discharge of the battery
If the end of the diaphragm or pole piece is not fixed, it will affect the tightness of the battery cell. During vacuum sealing and welding, it is easy to suck the diaphragm paper or pole piece away from the position, thus affecting the appearance and performance of the battery.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Get acetone, polytetrafluoroethylene and epoxy resin, carry out batching by following weight ratio acetone: polytetrafluoroethylene: epoxy resin=85: 5: 10, wherein acetone is made solvent, polytetrafluoroethylene and epoxy resin are solute , Add polytetrafluoroethylene and epoxy resin directly into acetone, stir evenly, and filter the transparent solution after the solute is dissolved, which is the diaphragm adhesive.

Embodiment 2

[0010] Embodiment 2: each raw material component is carried out batching by weight ratio acetone: polytetrafluoroethylene: epoxy resin=80: 15: 5, acetone is made solvent, polytetrafluoroethylene and epoxy resin are made solute, and solute is directly added into acetone , stir evenly, and filter to obtain a transparent solution after the solute is dissolved.

[0011] The liquid flexible packaging or polymer lithium battery diaphragm bonding glue of the present invention can be made of acetone, polytetrafluoroethylene, epoxy resin and polypropylene, and the weight percentage content of each raw material component is: acetone 78-90%, polytetrafluoroethylene 3-15%, epoxy resin 3-12%, polypropylene 2-5%.

Embodiment 3

[0013] The raw material components are mixed according to the weight ratio of acetone: polytetrafluoroethylene: epoxy resin: polypropylene = 80:10:5:5, acetone is used as a solvent, and the solute polytetrafluoroethylene, epoxy resin and polypropylene are directly added In acetone, stir evenly, and filter to obtain a transparent solution after the solute is dissolved.

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PUM

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Abstract

The present invention relates to a diaphragm bonding adhesive for soft package and polymer lithium cell. Said bonding adhesive composition includes (by wt%) 78-90% of acetone, 3-15% of polytetrafluoroethylene and 3-12% of epoxy resin.

Description

technical field [0001] The invention relates to adhesive glue technology, in particular to an adhesive glue for liquid flexible packaging and polymer lithium battery diaphragm. Background technique [0002] In recent years, the application range of liquid flexible packaging or polymer lithium batteries has become wider and wider, and the market has stricter quality requirements for them. Traditional battery winding generally uses adhesive tape to fix the end diaphragm or pole piece, and there are also diaphragms and pole pieces that are not fixed at the end. Fixing with adhesive paper, because the adhesive paper itself has a certain thickness, the appearance of the battery is not smooth, and the thickness of the battery is uneven. In addition, the introduction of adhesive paper may easily lead to large internal resistance and large self-discharge of the battery. If the end of the diaphragm or pole piece is not fixed, it will affect the tightness of the battery cell. During ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J127/18C09J163/00H01M50/446H01M50/46
CPCY02E60/10
Inventor 袁月馨傅舒顺刘聚龙王继生
Owner SHENZHEN B&K TECH
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