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Laminating member for battery package

A technology for battery outer packaging and laminates, which is applied to battery pack components, electrical components, hybrid boxes/housing/packages, etc. It can solve problems such as poor corrosion resistance, environmental protection is not the preferred solution, and peeling, etc., to achieve The effect of reducing defects

Active Publication Date: 2012-02-08
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since chromium, a heavy metal, is used in chromate treatment, it is not preferable from the viewpoint of environmental protection
In addition, chemical conversion treatments other than chromate treatment are less effective in improving corrosion resistance
[0008] Also, if the existing aluminum laminated film is formed at a deep drawing depth, when the aluminum laminated film is folded, the corners are stretched and may eventually reach the stretching limit and break, resulting in pinholes or cracks
In addition, the bonded surface between the aluminum foil and the substrate layer may be peeled off due to the influence of stress during stretching
Due to the occurrence of such defects during molding, the production efficiency of storage containers such as lithium-ion batteries decreases

Method used

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  • Laminating member for battery package
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  • Laminating member for battery package

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A substrate layer in which a stretched polyethylene terephthalate film with a thickness of 6 μm and a stretched polyamide film with a thickness of 25 μm was dry-laminated with a 40 μm-thick The aluminum foil was laminated with an adhesive layer (thickness 7 μm) formed of a urethane adhesive (containing an epoxy adhesive).

[0070] On the innermost surface of the aluminum foil, an amorphous polymer (manufactured by Nippon Synthetic Chemicals Co., Ltd., trade name: G Polymer Resin) and 1 wt. An aqueous solution of chromium(III) fluoride by weight % is laminated with a film coating layer, and further heated in an oven at 200° C. to cause a cross-linking reaction, so that the thickness after drying reaches 1 μm.

[0071] Further, on the film coating layer of aluminum foil with 3g / m 2 An acid-denatured polypropylene-based heat-sealing agent was applied, and a 30 μm polypropylene layer was laminated thereon, whereby the battery exterior laminate 10 of Example 1 was produced....

Embodiment 2

[0074] A substrate layer in which a stretched polyethylene terephthalate film with a thickness of 3 μm and a stretched polyamide film with a thickness of 25 μm was dry-laminated with a 40 μm-thick The aluminum foil was laminated with an adhesive layer (thickness 7 μm) formed of a urethane adhesive (containing an epoxy adhesive). And, on the surface of the innermost layer side of the aluminum foil, an amorphous polymer (manufactured by Nippon Synthetic Chemicals Co., Ltd., trade name: G Polymer Resin) and 1 wt. An aqueous solution of chromium (III) fluoride by weight % is laminated with a film coating layer, and further heat-dried in an oven at 200° C. so that the thickness after drying reaches 3 μm.

[0075] The melting point of the thin-film coating layer was confirmed by a differential thermal analysis device, and it was found that crosslinking occurred from the fact that there was no peak in the melting point. Figure 4 shows the results of measuring the thin film coating ...

Embodiment 3

[0089] A polyethylene terephthalate film with a thickness of 3 μm and a polyamide film with a thickness of 25 μm were passed through at a rate of 2 g / m 2 The substrate layer and the aluminum foil in which the applied urethane adhesive layer was laminated were bonded via a 7 μm urethane adhesive layer containing an epoxy adhesive. And, on the surface of the opposite side to the base material layer of the aluminum foil, an amorphous polymer (manufactured by Nippon Synthetic Chemicals Co., Ltd., trade name: G polymer resin) having a polyvinyl alcohol skeleton containing a hydroxyl group dissolved in 3% by weight was applied. And 1% by weight of chromium (III) fluoride aqueous solution, so that the thickness after drying reaches 3μm, on it with 3g / m 2 An acid-denatured polypropylene-based heat-sealing agent was applied, and then a 40 μm polypropylene layer was thermally laminated to produce the laminate 10 for battery outer packaging of Example 3 having a four-layer structure.

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Abstract

Provided is a laminating member for battery packaging. The laminating member is formed by sequentially laminating an aluminum foil and a resin layer for battery packaging. The laminating member sequentially laminates a substrate layer, an aluminium foil, and an innermost layer composed of a polypropylene layer and a polyethylene layer, wherein the substrate layer is a laminating membrane formed by sequentially laminating a PET(polyethylene terephthalate) membrane layer with the thickness ranging from 3 to 11 microns and a polyamide membrane layer with the thickness ranging from 15 to 50 microns upon the outside surface side of the aluminium foil. Moreover, the innermost layer side surface of the aluminium foil is laminated by a film coating layer composed of a water soluble resin or the copolymerization resin thereof.

Description

technical field [0001] The present invention relates to a battery outer packaging laminate used as an outer packaging material for secondary batteries such as lithium ion batteries and electric double layer capacitors (hereinafter referred to as capacitors). This application claims the priority of Invention Patent Application No. 2010-172266 filed in Japan on July 30, 2010, and the content thereof is incorporated into this application. Background technique [0002] In recent years, with the deepening of global environmental problems, the spread of electric vehicles and the effective use of natural energy such as wind power generation and solar power generation have become issues. Accordingly, in these technical fields, secondary batteries such as lithium ion batteries and capacitors are attracting attention as storage batteries for storing electric energy. In addition, as outer packaging containers for lithium-ion batteries used in electric vehicles, etc., flat bags made of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/085B32B15/20B32B15/08B32B27/08B32B27/36B32B27/34H01M2/02B32B15/088B32B15/09H01G11/00H01G11/78
CPCY02E60/13Y02E60/12
Inventor 饭塚宏和武井邦浩山田雅子松山岳生
Owner FUJIMORI KOGYO CO LTD
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