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Battery wrapping material, method for producing battery wrapping material, and battery

A technology for packaging materials and batteries, applied in batteries, sealing materials, electronic equipment, etc., can solve the problems of easy corrosion of barrier layers and acids, and achieve excellent long-term adhesion

Active Publication Date: 2020-03-31
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The barrier layer of a battery packaging material formed of a film-like laminate is usually composed of metal foil, etc., and there is a problem that the barrier layer is easily corroded when it comes into contact with acid

Method used

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  • Battery wrapping material, method for producing battery wrapping material, and battery
  • Battery wrapping material, method for producing battery wrapping material, and battery
  • Battery wrapping material, method for producing battery wrapping material, and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0170] On the surface of the biaxially stretched nylon film (25 μm) as the base layer, an aluminum foil (JIS H4160: 1994A8021H-O, JIS H4160: 1994A8021HO, A barrier layer having a thickness of 40 μm) was laminated by dry lamination. Specifically, a two-component polyurethane adhesive (polyol compound and aromatic isocyanate compound) was applied to one surface of an aluminum foil having an acid-resistant film to form an adhesive layer (thickness: 3 μm). Next, after laminating the adhesive layer on the barrier layer having an acid-resistant coating and the biaxially stretched nylon film side of the base layer, aging treatment is performed to produce a biaxially stretched nylon film / adhesive Layer / laminate of barrier layers having acid-resistant coatings on both sides.

[0171] Next, by co-extruding maleic anhydride-modified polypropylene and random polypropylene, maleic anhydride-modified polypropylene (23 μm) as an adhesive layer and Random polypropylene (23 μm) of heat-fusib...

Embodiment 2

[0174]As the base material layer, a laminated film obtained by laminating a biaxially stretched polyethylene terephthalate film (12 μm in thickness) and a biaxially stretched nylon film (15 μm in thickness) by dry lamination was prepared. In this laminated film, between the biaxially stretched polyethylene terephthalate film and the biaxially stretched nylon film, a polyurethane-based adhesive using a polyol and an isocyanate-based curing agent (thickness after curing 3 μm) for bonding. Next, on both sides of the biaxially stretched nylon film side, an aluminum foil (JIS H4160: 1994A8021H-O, thickness 40 μm) having an acid-resistant coating (thickness 10 nm) by performing chemical surface treatment in the same manner as in Example 1 was formed. The metal foils are laminated by dry lamination. Specifically, a two-component polyurethane adhesive (polyol compound and aromatic isocyanate compound) was coated on one surface of an aluminum foil with an acid-resistant coating, and a...

Embodiment 3

[0177] In the same manner as in Example 1, first, a laminate of biaxially stretched nylon film / adhesive layer / barrier layer having an acid-resistant film on both sides was prepared. Next, on the surface of the acid-resistant film of the obtained laminate, as an adhesive layer, apply an adhesive (thickness after curing: 3 μm) containing an amorphous polyolefin resin having a carboxyl group and a polyfunctional isocyanate compound. ), let it dry. On the adhesive side of the laminate, an unstretched laminated polypropylene film (random polypropylene (5 μm in thickness) / block polypropylene (30 μm in thickness) / random polypropylene Acrylic (thickness: 5 μm, total thickness: 40 μm) was laminated, passed between two heated rolls, and bonded, thereby laminating the adhesive layer / heat-fusible resin layer on the barrier layer. Next, by aging the obtained laminate, biaxially stretched polyethylene terephthalate film (12 μm) / adhesive (3 μm) / biaxially stretched nylon film were laminated ...

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Abstract

Provided is a battery wrapping material in which a barrier layer comprising an acid-resistant film has excellent long-term adhesion. This battery wrapping material is formed from a layered body comprising at least a substrate layer, a barrier layer and a thermally adhesive resin layer in that order, and comprises an acid-resistant film on the surface of at least one side of the barrier layer. Whenthe acid-resistant film is analysed using time-of-flight secondary ion mass spectrometry, the ratio PPO3 / CrPO4 of the peak intensity PPO3 derived from PO3 - to the peak intensity PCrPO4 derived fromCrPO4 - is in the range of 6-120.

Description

technical field [0001] The present invention relates to a battery packaging material, a method for producing the battery packaging material, and a battery. Background technique [0002] Currently, various types of batteries are developed. In these batteries, it is necessary to package the battery element composed of electrodes, electrolyte, and the like with a packaging material or the like. As packaging materials for batteries, metal packaging materials are often used. [0003] In recent years, batteries having various shapes have been demanded in accordance with the improvement in performance of electric vehicles, hybrid electric vehicles, personal computers, cameras, mobile phones, and the like. In addition, reduction in thickness and weight are also required for batteries. However, currently commonly used metal packaging materials are difficult to adapt to the diversification of battery shapes. In addition, since it is made of metal, the weight reduction of packaging...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02B32B15/08B32B27/00H01G11/78H01M50/119H01M50/121H01M50/129H01M50/133H01M50/145H01M50/186H01M50/193H01M50/198
CPCH01M50/133H01M50/198H01M50/119H01M50/183H01M50/186H01M50/121H01M50/124H01M50/145H01M50/129H01M50/193H01M50/116H01M2220/20H01G11/78Y02E60/10B32B7/12B32B2255/10B32B27/16B32B27/308B32B15/092B32B2250/02B32B15/095B32B2307/518B32B27/34B32B2255/26B32B2307/714B32B2307/732B32B15/098B32B27/42B32B15/088B32B2255/06B32B27/32B32B27/38B32B2457/10B32B2250/03B32B2270/00B32B2307/7242B32B15/18B32B27/40B32B2553/00B32B27/365B32B2307/7246B32B27/36B32B2307/31B32B2307/40B32B15/20B32B27/283B32B15/09B32B15/085B32B27/08
Inventor 津森薰山下孝典山下力也
Owner DAI NIPPON PRINTING CO LTD