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Laminate for use in armor of cell, and secondary cell

一种电池外壳、层压片的技术，应用在二次电池、小尺寸的电池/电池组、大尺寸的电池/电池组等方向，能够解决没有开发出电池外壳的层压片等问题，达到优良耐腐蚀性的效果

Inactive Publication Date: 2005-12-21
DAI NIPPON PRINTING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, laminated sheets for battery casings with such excellent properties have not been developed

Method used

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  • Laminate for use in armor of cell, and secondary cell
  • Laminate for use in armor of cell, and secondary cell
  • Laminate for use in armor of cell, and secondary cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0141] (1) Preparation of aluminum foil

[0142] An alkaline degreasing solution (2 g, product name: FC-315, manufactured by Nihon Parkerizing Co., Ltd.) was dissolved in 98 g of water to prepare an alkaline aqueous solution. The obtained alkaline aqueous solution was heated to 50° C., and soft aluminum foil (thickness 40 μm, product name: BESPA 8021, manufactured by Sumikei Aluminum-Foil Co. Ltd.) was immersed in the solution for 4 minutes. Thereafter, the aluminum foil was washed with water and further washed with deionized water, and then dried with hot air to obtain a degreased soft aluminum foil.

[0143] (2) Form a resin film layer on the surface of the aluminum foil

[0144] Use a roller coater with a coating volume of 2ml / m on each side 2 In this way, the water-containing treatment agent (a) is coated on both sides of the soft aluminum foil subjected to degreasing treatment. Then, by heating and drying the aluminum foil at 180° C., resin film layers were formed on b...

Embodiment 2

[0150] An aluminum foil was prepared in the same manner as in Example 1, and a resin film layer and an outer layer were formed on the surface of the aluminum foil. Then form the inner layer as follows:

[0151] On the inner resin film layer, maleic anhydride-modified polypropylene was extruded with a thickness of 15 μm using a T-die extruder, and an unstretched polypropylene film with a thickness of 30 μm (Futamura Chemical Industries Co., Ltd. .Manufacture, trade name: FCZK) sanding lamination, form the laminated sheet that the present invention is used for battery case.

Embodiment 3

[0153] A laminate sheet for a battery case of the present invention was formed in the same manner as in Example 2, except that the aqueous treatment agent (b) was used instead of the aqueous treatment agent (a) to form resin film layers on both surfaces of the aluminum foil.

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Abstract

The present invention relates to a laminate for battery casings, said laminate comprising an aluminum foil and an inner layer, wherein an aminated phenolic polymer (A), a trivalent chromium compound (B) is arranged between the aluminum foil and the inner layer and a resin film layer of a phosphorus compound (C). The laminated sheet used for the battery casing of the present invention has excellent adhesiveness, gas barrier properties, etc., and therefore is suitable for use as a packaging material for secondary batteries, especially lithium ion polymer secondary batteries.

Description

technical field [0001] The present invention relates to a laminated sheet for a battery case of a secondary battery such as a lithium ion battery or the like, particularly a lithium ion polymer battery using a gel electrolyte. Background technique [0002] Lithium ion secondary batteries are widely used in various electronic devices and components, especially in portable telephones, notebook personal computers, video cameras, satellites, electric vehicles, and the like. [0003] Among lithium ion secondary batteries, a lithium ion polymer secondary battery uses a gel electrolyte containing a conductive polymer or the like as its electrolyte. Lithium-ion polymer secondary batteries are very safe compared to lithium-ion batteries using non-aqueous electrolytes because the possibility of leakage of the electrolyte solution is very small, and lithium-ion polymer secondary batteries can be made smaller and lighter lighter. Therefore, the lithium ion polymer secondary battery is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/08H01M10/0525H01M10/0565H01M50/126H10N10/80
CPCB32B15/08H01M10/0525Y10T428/269Y10T428/26Y10T428/31714Y10T428/31678Y02E60/10H01M50/124H01M50/126
Inventor 新尾荣树三上豪一后藤贵和田中和也清水秋雄森田良治
Owner DAI NIPPON PRINTING CO LTD