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Packaging material for battery, manufacturing method therefor, and battery

A packaging material and battery technology, applied in battery pack components, chemical instruments and methods, circuits, etc., can solve problems such as insufficient consideration

Active Publication Date: 2018-10-23
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in existing battery packaging materials using a laminate of a polyester film and a polyamide film as a base material, it is considered that the polyamide film contributes to the improvement of formability. Moldability has not been fully considered

Method used

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  • Packaging material for battery, manufacturing method therefor, and battery
  • Packaging material for battery, manufacturing method therefor, and battery
  • Packaging material for battery, manufacturing method therefor, and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0241] A polyethylene terephthalate film and a nylon film were laminated by coextrusion and biaxially stretched to prepare a laminated film. Between the biaxially stretched polyethylene terephthalate film (thickness 5 μm) and the biaxially stretched nylon film (thickness 20 μm) of the laminated film, there is polyester resin (polyester elastomer) ) composed of an adhesive layer (thickness 1 μm). This laminated film is laminated in the order of resin layer / adhesive layer / substrate layer. Next, chemical surface treatment was performed on both sides of the biaxially stretched nylon film side, and a barrier made of aluminum foil (JIS H4160: 1994A8021H-O, thickness 40 μm) with an acid-resistant coating was laminated by dry lamination. Floor. Specifically, a two-component polyurethane-based adhesive (polyol compound and aromatic isocyanate-based compound) was applied to one surface of an aluminum foil having an acid-resistant coating to form an adhesive layer (thickness: 3 μm). N...

Embodiment 2

[0255] Except that the non-stretched polypropylene film (CPP, thickness 40 μm) is used instead of the non-stretched polypropylene film (CPP, thickness 80 μm), the same operation is performed as in Example 1 to obtain biaxially stretched polyethylene terephthalate. Alcohol ester film (5μm) / adhesive (1μm) / biaxially stretched nylon film (20μm) / adhesive layer (3μm) / barrier layer (40μm) / adhesive layer (2μm) / non-stretched polypropylene A battery packaging material in which films (40 μm) are laminated sequentially. Table 1 shows the layer configuration of the battery packaging material. Among them, the aluminum foil used as the barrier layer has an acid-resistant coating containing cerium oxide and phosphate. The analysis results of the acid-resistant coating were the same as those in Examples.

Embodiment 3－5 and comparative example 1－2

[0257]As the substrate layer, a laminate film in which a biaxially stretched polyethylene terephthalate film (thickness 12 μm) and a biaxially stretched nylon film (thickness 15 μm) were laminated 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 3μm) bonding. In addition, the biaxially stretched polyethylene terephthalate film contained in the base material layer used in Example 3-5 and Comparative Example 1-2 was different from each other. Next, by dry lamination, on the side of the biaxially stretched nylon film, an aluminum foil (JIS H4160: 1994A8021H-O, thickness 40 μm) is laminated with an acid-resistant coating on both sides by chemical surface treatment. metal foil. Specifically, a two-component polyurethane-based adhesive (polyol compound and aromatic...

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Abstract

Provided is a packaging material for a battery, said packaging material having superior formability. A packaging material for a battery, said packaging material being composed from a layered body thatcomprises at least a substrate layer, a barrier layer, and a thermally fusible resin layer, in this order, wherein the substrate layer has at least a polyester film layer and a polyamide film layer,and when the fusion peak temperature of the polyester film layer is measured twice using differential scanning calorimetry, the difference between the fusion peak temperature P (DEG C) measured duringa first temperature increase and the fusion peak temperature Q (DEG C) measured during a second temperature increase is within 5 DEG C.

Description

technical field [0001] The present invention relates to a packaging material for batteries, a manufacturing method thereof, and batteries. Background technique [0002] Various types of batteries have been developed so far, and in all of them, packaging materials are parts that are not available for encapsulating battery elements such as electrodes and electrolytes. Conventionally, metal packaging materials are often used as packaging for batteries. [0003] On the other hand, in recent years, with the high performance of electric vehicles, hybrid electric vehicles, computers, cameras, mobile phones, etc., various shapes of batteries are required, and thinner and lighter weights are also required. However, when using a metal battery packaging material commonly used in the prior art, there are disadvantages that it is difficult to cope with diversification of battery shapes, and there is a limit to weight reduction. [0004] Therefore, as a battery packaging material that c...

Claims

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Application Information

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IPC IPC(8): H01M2/02B32B27/00B32B27/34B32B27/36H01G11/78B32B7/02H01M50/105
CPCB32B7/02B32B27/00B32B27/34B32B27/36H01G11/78Y02E60/10H01M50/105
Inventor 津森薰山下力也山下孝典
Owner DAI NIPPON PRINTING CO LTD