Outer casing material for electricity storage devices

A technology for electrical storage equipment and components, which is applied in the field of exterior components for electrical storage equipment, can solve problems such as cost reduction and thinning restrictions, stretched polyamide film dissolution, and insufficient scratch resistance, and achieves easy identification and realization of thin film Excellent effect of chemicalization and insulation

Inactive Publication Date: 2016-11-09
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the stretched polyamide film is used, there is a problem that the stretched polyamide film will dissolve when the electrolyte solution is attached to the stretched polyamide film in the electrolyte solution injection process or the like.
[0007] In addition, the exterior member of Patent Document 1 has insufficient scratch resistance against transportation scratches and the like.
[0008] In addition, with the exterior member of Patent Document 1, the appearance of the exterior member has a tint of metal foil, and even if pinholes are formed on the base material or the metal foil, it is difficult to distinguish
[0009] In addition, in the technology of Patent Document 1, an adhesive layer must be provided in order to bond the stretched film to the barrier layer, so there are limitations in terms of cost reduction and thinning.

Method used

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  • Outer casing material for electricity storage devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Toluene diisocyanate was added to a tetrafluoroethylene-vinyl copolymer resin, and titanium black with an average particle diameter of 2 μm was added so that the content thereof would be 5% by mass in the total solid content to prepare a coating liquid. On one side of the metal foil layer formed with 50 nm thick anti-corrosion treatment layers on both sides by cerium oxide sol treatment, the above-mentioned coating solution was applied so as to have a dry film thickness of 5 μm, and dried in an oven. An aging treatment was then carried out at 60°C for 7 days to promote curing. In addition, a polypropylene cast film was bonded to the surface of the metal foil layer opposite to the surface on which the coating film was formed using a polyurethane adhesive to produce an exterior member.

Embodiment 2

[0097] An exterior member was produced in the same manner as in Example 1 except that the addition amount of titanium black was 10% by mass.

Embodiment 3

[0099] An exterior member was produced in the same manner as in Example 1 except that the addition amount of titanium black was 20% by mass.

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Abstract

The present invention discloses an outer casing material for electricity storage devices. The outer casing material is provided with: a metal foil layer; a coating layer that is formed on a first surface of the metal foil layer; a corrosion prevention treatment layer that is formed on a second surface of the metal foil layer; an adhesive layer that is formed on the corrosion prevention treatment layer; and a sealant layer that is formed on the adhesive layer. The coating layer contains at least one resin selected from the group consisting of fluorine-based resins, polyester resins and polyurethane resins; and the coating layer contains a pigment in an amount of 1-30% by mass.

Description

technical field [0001] The present invention relates to an exterior member for an electrical storage device. Background technique [0002] Conventionally, nickel metal hydride and lead storage batteries are known as secondary batteries and other electrical storage devices. However, due to the miniaturization of portable devices and restrictions on installation space, etc., miniaturization is often required, so lithium-ion batteries with high energy density Batteries are getting attention. Metal cans have been used as exterior members for lithium-ion batteries (hereinafter sometimes simply referred to as “exterior members”), but multilayer films that are light in weight, have high heat dissipation properties, and can be used at low cost are gradually being used. . [0003] The electrolyte solution of the lithium-ion battery is composed of aprotic solvents and electrolytes such as propylene carbonate, ethylene carbonate, dimethyl carbonate, diethyl carbonate, and ethyl methy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/18C09D167/00C09D175/06C09D7/12H01M2/02H01M10/0525B32B15/18B32B15/20B32B15/085B32B7/12B32B33/00B32B37/10B32B37/12H01M50/119H01M50/121H01M50/129H01M50/133H01M50/145
CPCC09D7/61B32B7/12B32B15/085B32B15/18B32B15/20B32B33/00B32B37/10B32B37/12C08K3/22C09D127/18C09D167/00C09D175/06B32B2311/24B32B2311/30B32B2323/00B32B2307/206B32B2307/554B32B2307/204B32B2255/28B32B2255/06B32B2457/10C08K2003/2237H01M50/145H01M50/129H01M50/119H01M50/121H01M50/133H01M10/052Y02E60/10H01M50/124B32B15/08B32B27/20B32B27/36B32B27/40
Inventor 佐藤美菜
Owner TOPPAN PRINTING CO LTD
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