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Wound body of battery packaging material

A technology of packaging materials and winding bodies, which is applied in sealing materials, electronic equipment, transportation and packaging, etc., and can solve the problems of light weight limit of packaging materials and difficulties in coping with the diversification of battery shapes

Active Publication Date: 2020-03-17
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to cope with the diversification of battery shapes with metal packaging materials that have been widely used in the past.
In addition, since it is made of metal, there is a limit to the weight reduction of packaging materials

Method used

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  • Wound body of battery packaging material
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  • Wound body of battery packaging material

Examples

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Comparison scheme
Effect test

Embodiment

[0343] Hereinafter, examples will be shown to describe the present invention in detail. However, this invention is not limited to an Example. In addition, the examples are shown in the order of the first aspect A, the second aspect B, and the third aspect C.

[0344] Embodiment of the first form A

[0345] [Manufacture of battery packaging material A]

[0346] A metal layer 3 including an aluminum foil (thickness 40 μm) subjected to chemical conversion treatment on both sides was laminated on a base layer 1 including a stretched nylon film (thickness 25 μm) by a dry lamination method. Specifically, a two-component polyurethane adhesive (polyol compound and aromatic isocyanate compound) was applied to one side of the aluminum foil to form an adhesive layer 2 (thickness: 4 μm) on the metal layer 3 . Next, after bonding the adhesive layer 2 on the metal layer 3 and the base material layer 1 under pressure and heat, aging treatment was carried out at 40°C for 24 hours, thereb...

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Abstract

The present invention relates to a wound body of packaging material for batteries, which comprises a laminated film in which at least a coating layer, a base material layer, a metal layer and a sealing layer are laminated in sequence, and the coating layer is composed of a two-liquid The sealing layer is formed of a curable resin, the sealing layer is formed of a thermoplastic resin melted and extruded, the sealing layer contains foreign matter or unmelted material of the thermoplastic resin, and the position of the protrusion can be recognized on the surface of the sealing layer, Marking is given to the above-mentioned laminated film, wherein the above-mentioned convex portion is a convex portion caused by the above-mentioned foreign matter or the above-mentioned unmelted material, and the area of ​​the convex portion when viewed from the lamination direction of the above-mentioned laminated film exceeds 0.4mm 2 , the wound body is wound so that the surface of the sealing layer is in contact with the surface of the coating layer. Thereby, defects of the coating layer can be properly managed.

Description

technical field [0001] The present invention relates to a wound body of a battery packaging material, a method for manufacturing the wound body, and a defect inspection method of a battery packaging material. Background technique [0002] Conventionally, various types of batteries have been developed. For these batteries, battery elements composed of electrodes, electrolytes, etc. need to be packaged with packaging materials, etc. As packaging materials for batteries, metal packaging materials are widely used. [0003] In recent years, as the performance of electric vehicles, hybrid electric vehicles, personal computers, cameras, mobile phones, etc. has increased, batteries having various shapes have been required. In addition, thinning, weight reduction, and the like are also required for batteries. However, it is difficult to cope with the diversification of battery shapes with a metal packaging material that has been widely used in the past. Also, since it is made of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02B32B1/00B32B15/08H01G11/78
CPCB32B1/00H01G11/78B32B15/04B32B3/30B32B2457/10B32B2553/00H01G11/80Y02T10/70Y02E60/10H01M50/124Y02E60/13H01M50/119H01M50/121H01M50/133H01M50/183
Inventor 横田一彦山下力也早川阳祐
Owner DAI NIPPON PRINTING CO LTD
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