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Aluminum pouch film for secondary battery, packaging material comprising same, secondary battery comprising same, and manufacturing method therefor

A secondary battery and soft coating technology, which is applied in the direction of battery box/case material, electrolyte battery manufacturing, battery, etc., can solve the problems of difficulty in obtaining equivalent to hexavalent chromium, lower processing speed, poor working environment, etc., and achieve realization Environmental friendliness and economic efficiency, delamination prevention, chemical reaction prevention effect

Inactive Publication Date: 2016-01-06
HEESUNG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to obtain functions equivalent to hexavalent chromium, and chromate treatment using heavy metal chromium is still undesirable from an environmental point of view
In addition, since the reagents used for chemical conversion treatment often cause corrosion of the coating machine, the use of the coating machine is limited, and the working environment may become worse
In addition, in order to enhance the adhesion of the above reagents, acid or alkali dipping treatment, degreasing and etching must be carried out during the manufacturing process, which undesirably generates high processing costs and significantly reduces the processing rate in the manufacture of battery packaging materials.

Method used

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  • Aluminum pouch film for secondary battery, packaging material comprising same, secondary battery comprising same, and manufacturing method therefor
  • Aluminum pouch film for secondary battery, packaging material comprising same, secondary battery comprising same, and manufacturing method therefor
  • Aluminum pouch film for secondary battery, packaging material comprising same, secondary battery comprising same, and manufacturing method therefor

Examples

Experimental program
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Effect test

Embodiment 1～3 and comparative example 1～6

[0040] Examples 1-3 and Comparative Examples 1-6: Manufacture of Aluminum Soft Cover Film

[0041] The aluminum soft coating for secondary batteries according to the present invention will be described in detail through the following examples.

Embodiment 1

[0043] A 40 µm-thick aluminum foil (manufactured by Dong-il Aluminum) was cut into an area of ​​30 cm x 20 cm, and then washed with water, thereby removing dust on its surface.

[0044] Next, the outer resin layer was stacked on the first surface of the aluminum foil in such a manner that a 4 μm thick polyurethane adhesive resin (manufactured by Hi-Chem) was applied and a 25 μm thick layer was formed on the aluminum layer by dry lamination. Nylon 6 (manufactured by Hyosung) was aged at 40°C for 7 days.

[0045] Next, the inner resin layer was stacked on the second surface of the aluminum foil in such a manner that a 4 μm-thick adhesive was applied, wherein the adhesive included polyurethane (manufactured by Mitsui) mixed in a weight ratio of 70:30 as the main Components and one chain of polyols with SiO 2 modified monomer (manufactured by Rhodia); and polypropylene (manufactured by Okamoto) was formed to a thickness of 40 μm on the aluminum layer by dry lamination, followed b...

Embodiment 2

[0047] A 40 µm-thick aluminum foil (manufactured by Dong-il Aluminum) was cut into an area of ​​30 cm x 20 cm, and then washed with water, thereby removing dust on its surface.

[0048] Next, the copolymer layer was stacked on the second surface of the aluminum foil by applying a 5 μm thick mixture comprising VPA (vinylphosphonic acid) (manufactured by Rhodia) and AA (acrylic acid) at a thickness of 5:1, and then Heat treatment at 120°C for 3 days.

[0049] Next, the outer resin layer was stacked on the first surface of the aluminum foil in such a manner that a 4 μm thick polyurethane adhesive resin (manufactured by Hi-Chem) was applied and a 25 μm thick layer was formed on the aluminum layer by dry lamination. Nylon 6 (manufactured by Hyosung) was aged at 40°C for 7 days.

[0050] Next, the inner resin layer was stacked on the second surface of the aluminum foil having the copolymer layer in such a manner that a 4 μm thick polyurethane adhesive (manufactured by Mitsui) was a...

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Abstract

The present invention relates to an aluminum pouch film for a secondary battery and a manufacturing method therefor, the aluminum pouch film comprising: an aluminum layer; an outer resin layer formed on the first surface of the aluminum film; a first adhesive layer for adhering the aluminum layer to the outer resin layer; an inner resin layer formed on the second surface of the aluminum layer; and a second adhesive layer for adhering the aluminum layer to the inner resin layer.

Description

technical field [0001] The present invention relates to an aluminum pouch film for a secondary battery and a manufacturing method thereof, and more particularly, the present invention relates to a production of an aluminum pouch film for a secondary battery, wherein, with Compared with conventional soft covers for secondary batteries, the aluminum soft covers maintain insulating properties and electrolyte resistance, although aluminum surface treatment in conventional manufacturing methods is omitted. Background technique [0002] Secondary batteries generally refer to lithium secondary batteries, which are used in portable terminal devices such as notebook computers, smartphones, tablets, and video cameras, electric vehicles including hybrid vehicles, and smart grids for energy storage. Intensive research into secondary batteries that are small, light, and thin, and can withstand various environmental conditions including extreme heat conditions and mechanical shocks is und...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M50/119H01M50/121H01M50/126H01M50/131H01M50/133
CPCH01M10/052Y02E60/10H01M50/124Y02P70/50H01M10/058H01M50/126H01M50/133H01M50/121H01M50/119H01M50/131B29C65/48B29C66/43B29K2505/02B29L2031/7146B32B7/12B32B15/08B32B15/20B32B37/12B32B2255/06B32B2255/26B32B2311/24B32B2457/10H01M2220/10H01M2220/20H01M2220/30
Inventor 具昌佚李谆植李周亨
Owner HEESUNG CHEM
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