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Outer packaging material for power storage device, method for producing same, and power storage device

A technology for power storage devices and outer packaging, which is applied in the manufacture of secondary batteries, hybrid/electric double-layer capacitors, lamination devices, etc. and insulation reduction effect

Pending Publication Date: 2022-03-01
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the metal outer packaging materials for power storage devices that are widely used at present have the disadvantages that it is difficult to cope with the diversification of shapes, and there is a limit to the reduction in weight.

Method used

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  • Outer packaging material for power storage device, method for producing same, and power storage device
  • Outer packaging material for power storage device, method for producing same, and power storage device
  • Outer packaging material for power storage device, method for producing same, and power storage device

Examples

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Effect test

Embodiment 1、2 and comparative example 1、2

[0164] A polyethylene terephthalate (PET) film (thickness 12 μm) and stretched nylon (ONy) film (thickness 15 μm) were prepared, and a two-component polyurethane adhesive (polyol compound and aromatic Group isocyanate-based compound) (3 μm), bonded to ONy film as a substrate layer. In addition, an aluminum alloy foil (JIS H4160: 1994A8021H-O (40 μm in thickness)) was prepared as a barrier layer. Next, a two-component polyurethane adhesive (polyol compound and aromatic isocyanate compound) was applied to one surface of the aluminum alloy foil to form an adhesive layer (thickness: 3 μm) on the barrier layer. Next, after laminating the adhesive layer on the barrier layer and the substrate layer (ONy film side) by dry lamination, aging treatment is performed to manufacture a substrate layer / adhesive layer / barrier layer laminate. layers. Chemical surface treatment was performed on both sides of the aluminum alloy foil. The chemical method surface treatment of aluminum alloy foil...

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Abstract

Provided is an outer packaging material for a power storage device, which has a heat-fusible resin layer containing polypropylene and polyethylene, and in which whitening and deterioration of insulation properties due to molding are suppressed. The outer packaging material for a power storage device comprises a laminate having at least a base material layer, a barrier layer, and a heat-fusible resin layer in this order from the outside to the inside, and the heat-fusible resin layer contains polypropylene and polyethylene. The sea-island structure can be observed in a cross-sectional image obtained using a scanning electron microscope with respect to a cross-section of the heat-fusible resin layer in the thickness direction in a direction parallel to the TD, the cross-sectional image being obtained by taking the total thickness of the layers located further inward than the barrier layer as 100%, and the total thickness of the layers located further inward than the barrier layer as 100%. In a cross-sectional image obtained from the surface of the thermally fusible resin layer on the opposite side from the barrier layer side to a portion having a thickness of 12.5%, the ratio of the total number of island parts having an area of 0.02 [mu] m2 or less among the island parts in the cross-sectional image is 80.0% or more with respect to the total number of island parts of the sea-island structure.

Description

technical field [0001] The present invention relates to an outer packaging material for an electrical storage device, a manufacturing method thereof, and an electrical storage device. Background technique [0002] At present, various power storage devices have been developed, but no matter what kind of power storage device, the outer packaging material for encapsulating the components of the power storage device such as electrodes and electrolytes is an essential part. At present, metal outer packaging materials are often used as outer packaging materials for power storage devices. [0003] On the other hand, in recent years, with the improvement of performance of electric vehicles, hybrid electric vehicles, personal computers, cameras, mobile phones, etc., power storage devices are required to have a variety of shapes, and are required to be thinner and lighter. . However, metal exterior materials for power storage devices that are widely used at present have the disadvan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/126H01M10/04
CPCH01M50/126H01M10/04H01G11/78B32B27/32H01G11/84H01M50/121H01M50/129H01M50/133H01M50/124H01M50/131B32B37/04B32B7/12Y02E60/10Y02P70/50H01G9/08
Inventor 安田大佑山下孝典
Owner DAI NIPPON PRINTING CO LTD
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