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Anti-stripping sealing film for lithium battery and preparation method thereof and aluminum-plastic composite film thereof

A sealing film, lithium battery technology, applied in the field of aluminum-plastic composite film, can solve the problems of increasing the risk of peeling, battery packaging film leakage, increasing the number of layers, etc., to reduce the risk of peeling, good uniformity, and improve cold stamping. The effect of forming depth

Pending Publication Date: 2019-07-30
江阴长庚高科技材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The use of adhesives in the packaging film structure for soft-pack lithium batteries increases the number of layers, and the aluminum-plastic composite film will increase the risk of peeling during the cold forming process, resulting in leakage and failure of the battery packaging film

Method used

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  • Anti-stripping sealing film for lithium battery and preparation method thereof and aluminum-plastic composite film thereof
  • Anti-stripping sealing film for lithium battery and preparation method thereof and aluminum-plastic composite film thereof
  • Anti-stripping sealing film for lithium battery and preparation method thereof and aluminum-plastic composite film thereof

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Embodiment Construction

[0037] The present invention will be further described in conjunction with specific embodiment now. These drawings are simplified schematic diagrams only to illustrate the basic structure of the present invention in a schematic way, so they only show the components relevant to the present invention.

[0038] Such as figure 1 As shown, a sealing film for anti-peeling lithium battery includes a sealing outer layer and a sealing inner layer, and an adhesive resin layer is arranged between the sealing outer layer and the sealing inner layer.

[0039] The outer sealing layer can be any one of nylon (PA), polypropylene (PP) or polyester (PET); the number of layers of the outer sealing layer can be 1-5 layers;

[0040] The inner layer of the seal can be any one of nylon (PA), polypropylene (PP) or polyester (PET); the number of layers of the outer layer of the seal can be 1-5 layers;

[0041] The adhesive resin layer is an anhydride-modified adhesive resin. When the anhydride-modif...

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Abstract

The invention relates to an anti-stripping sealing film for a lithium battery and a preparation method thereof and an aluminum-plastic composite film thereof, wherein the anti-stripping sealing film comprises a sealing outer layer and a sealing inner layer; an adhesive resin layer is arranged between the sealing outer layer and the sealing inner layer. The composite film is subjected to twice foaming and once horizontal stretching; the aluminum-plastic composite film comprises a molding outer layer, an aluminum foil layer and an inner sealing layer, wherein the aluminum foil layer is bonded with the molding outer layer through a first bonding layer, the aluminum foil layer is bonded with the inner sealing layer through a second bonding layer, and the inner sealing layer adopts the sealingfilm. By changing the structure of the traditional sealing film (inner film) and connecting the sealing outer layer on the sealing inner film by adhesive resin, after the aluminum-plastic composite film is used, the sealing outer layer is used as an intermediate layer of the whole aluminum-plastic composite film, so that the problem that the prior intermediate layer needs to be coated with adhesive on two sides so as to increase the number of adhesive layers in the whole plastic composite film is avoided, and the peeling risk is reduced by reducing the number of adhesive layers.

Description

technical field [0001] The invention relates to the field of batteries, in particular to an anti-stripping sealing film for lithium batteries, a preparation method of the sealing film, and an aluminum-plastic composite film with the sealing film. Background technique [0002] Aluminum-plastic composite film is used as the packaging film for soft-packed lithium batteries. The structure of the aluminum-plastic composite film is roughly: the outer layer of the exterior, the middle aluminum foil layer, and the inner sealing layer. The inner sealing layer is the sealing film, which is used to directly wrap the lithium battery. chemical raw materials. [0003] In order to further protect the aluminum foil from damage and pinholes during the cold stamping process, an intermediate layer will be added between the aluminum foil and the inner sealing layer, that is, the structure of the aluminum-plastic composite film is: forming outer layer, aluminum foil, intermediate layer, The str...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/34B32B27/32B32B27/36B32B7/12B32B15/20H01M2/02B29C69/00B29C48/18H01M50/124
CPCB32B27/08B32B27/34B32B27/32B32B27/36B32B7/12B32B15/20B29C48/18B29C48/0012B29C48/0018B32B2307/558B32B2457/10H01M50/124Y02E60/10
Inventor 宋浚哲
Owner 江阴长庚高科技材料有限公司
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