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Aluminum-plastic film for packaging lithium battery and preparation method thereof

A technology of aluminum-plastic film and lithium battery, which is applied to battery components, chemical instruments and methods, circuits, etc., can solve the problems of poor white lines, poor sol properties, and low peeling force, and achieve good heat-sealing sol properties. Aluminum leakage effect, good adhesion, low surface energy effect

Active Publication Date: 2020-08-25
JIANGXI MING CROWN LITHIUM MEMBRANE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Another object of the present invention is to provide a method for preparing an aluminum-plastic film for lithium battery packaging. The method adopts a high-low temperature aging process to make the aluminum-plastic film obtained overcome the problem of using a low-temperature 40°C constant-temperature aging process to obtain an aluminum-plastic film in the past. Poor white line after shelling, poor colloidal properties and low peeling force

Method used

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  • Aluminum-plastic film for packaging lithium battery and preparation method thereof
  • Aluminum-plastic film for packaging lithium battery and preparation method thereof
  • Aluminum-plastic film for packaging lithium battery and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0035] An aluminum-plastic film for lithium battery packaging, the aluminum-plastic film includes a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, The polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer with a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are attached with a polyurethane adhesive Combined, the polyurethane adhesive is German Weishi group corner glue COSMOPUR 818C German guard polyurethane adhesive; the modified polyolefin adhesive includes the following raw materials in parts by weight:

[0036]

[0037]

[0038] The polyolefin is POE 8180 American Dow polyolefin.

[0039] Every part of described modified epoxy resin comprises the raw material of follo...

Embodiment 2

[0061] An aluminum-plastic film for lithium battery packaging, the aluminum-plastic film includes a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, The polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer with a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are attached with a polyurethane adhesive Combined, the polyurethane adhesive is German Weishi group corner glue COSMOPUR 818C German guard polyurethane adhesive; the modified polyolefin adhesive includes the following raw materials in parts by weight:

[0062]

[0063] The polyolefin is POE 8180 American Dow polyolefin.

[0064] Every part of described modified epoxy resin comprises the raw material of following weight ...

Embodiment 3

[0086] An aluminum-plastic film for lithium battery packaging, the aluminum-plastic film includes a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, The polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer with a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are attached with a polyurethane adhesive Combined, the polyurethane adhesive is German Weishi group corner glue COSMOPUR 818C German guard polyurethane adhesive; the modified polyolefin adhesive includes the following raw materials in parts by weight:

[0087]

[0088] The polyolefin is POE 8180 American Dow polyolefin.

[0089] Every part of described modified epoxy resin comprises the raw material of following weight ...

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Abstract

The invention relates to the technical field of soft package materials for lithium battery packaging, particularly to an aluminum-plastic film for lithium battery packaging and a preparation method thereof. The aluminum-plastic film comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, wherein the aluminum foil layer is attached tothe polypropylene heat sealing layer; polyurethane fibers are attached to the aluminum foil layer; the polyurethane fiber layer and the aluminum foil layer are bonded through a modified polyolefin adhesive; and the aluminum foil layer and the polypropylene heat-sealing layer are bonded through a polyurethane adhesive. The modified polyolefin adhesive is prepared from the following raw materials inparts by weight: 1 to 5 parts of alpha-methylstyrene dimer, 1 to 3 parts of dibenzoyl peroxide, 15 to 25 parts of modified epoxy resin, 20 to 30 parts of polyolefin, 1 to 5 parts of a curing agent, 0.5 to 3 parts of an antioxidant, 1 to 3 parts of a defoaming agent, 1 to 5 parts of a cross-linking agent and 20 to 40 parts of a solvent. The aluminum-plastic film provided by the invention has excellent barrier property, ductility and corrosion resistance, and also has good heat-sealing sol aluminum leakage prevention effect.

Description

technical field [0001] The invention relates to the technical field of lithium battery packaging soft package materials, in particular to an aluminum-plastic film for lithium battery packaging and a preparation method thereof. Background technique [0002] In recent years, the rapid development of the new energy industry has led to a sharp increase in the application of soft-pack lithium batteries. The soft-packed lithium battery packaged with aluminum-plastic film has the characteristics of flexible shape, good safety performance, and high energy density, which greatly improves the flexibility and applicability of battery design, so that it can be made into a variety of shapes and capacities to meet product needs. The battery provides developers with high design flexibility and adaptability in power solutions. At present, mainstream digital products and electric vehicles mainly use soft-pack lithium batteries. However, ordinary aluminum-plastic films cannot meet the perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/02B32B27/40B32B15/14B32B15/20B32B27/06B32B27/32B32B7/12B32B33/00H01M2/02C09J123/08C09J163/00C09J175/04C09J11/04C09J11/06C09J11/08
CPCB32B5/02B32B7/12B32B15/14B32B15/20B32B27/06B32B27/32B32B33/00B32B2262/0292B32B2307/7244B32B2307/7246B32B2307/752C08L2205/035C09J11/04C09J11/06C09J11/08C09J123/0815H01M50/124C08L63/00C08L75/04C08L83/04C08L91/06C08K13/02C08K3/36C08K5/34922C08K3/042Y02E60/10
Inventor 周新平刘礼
Owner JIANGXI MING CROWN LITHIUM MEMBRANE TECH CO LTD
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