Resin-metal composite seal container and method for producing same

Patent metadata

Field	Value
Publication number	US-9905817-B2
Application number	US-201314382897-A
Country	US
Kind code	B2
Filing date	Feb 21, 2013
Priority date	Mar 5, 2012
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A resin-metal composite sealed container having a heat seal part using a heat-sealing resin, between an end part of a first metal foil and an end part of a second metal foil, and a metallically sealed part with a weld bead, on the end face outside the heat sealed part of the first metal foil and the second metal foil. The resin-metal composite sealed container, wherein the melting point of the metal constituting the metal foil is higher by 300° C. or more than the thermal decomposition temperature of the heat-sealing resin, the specific gravity of the metal constituting the metal foil is 5 or more, and the weld bead is formed by a laser welding. A method for producing a metal-resin composite sealed container, comprising forming a container by heat sealing end parts of metal foils having laminated on at least one surface thereof a heat-sealing resin, and forming a metallically sealed part with a weld bead on the end faces of the metal foils by heating/welding an outer side of the heat sealed part of the container from a side of the end faces of the metal foils.

First claim

The invention claimed is:

1. A resin-metal composite sealed container having:
a first metal foil having an end part,
a second metal foil having an end part,
a heat sealed part using a heat-sealing resin, between said end part of said first metal foil and said end part of said second metal foil, and
a metallically sealed part with a weld bead, on an end face outside said heat sealed part of said first metal foil and said second metal foil, the weld bead formed from the end parts of the first metal foil and the second metal foil to a location outside the heat sealed part with a space therebetween, wherein:
the melting point of the metal constituting said metal foil is higher by 300° C. or more than the thermal decomposition temperature of said heat-sealing resin,
the specific gravity of the metal constituting said metal foil is 5 or more, and
said weld bead is formed by a laser welding.

2. The resin-metal composite sealed container according to claim 1 , wherein said metallically sealed part of said first metal foil and said second metal foil is a weld bead formed by heating said first metal foil and said second metal foil from a side of said end face thereof.

3. The resin-metal composite sealed container according to claim 2 , wherein said weld bead is a weld bead having a substantially circular cross-sectional shape and the dimension of the weld bead in the thickness direction of the metal foil is from 1.1 to 5.0 times the thickness-direction dimension of said first metal foil and said second metal foil in the portion coming into contact with said weld bead.

4. The resin-metal composite sealed container according to claim 2 , wherein said first metal foil and said second metal foil are bridged by said weld bead and the thickness-direction dimension of said first metal foil and said second metal foil near said weld bead is equal to the thickness-direction dimension of said first metal foil and said second metal foil in said heat seal part.

5. The resin-metal composite sealed container according to claim 1 , wherein said weld bead is a weld bead having a substantially circular cross-sectional shape and the dimension of the weld bead in the thickness direction of the metal foil is from 1.1 to 5.0 times the thickness-direction dimension of said first metal foil and said second metal foil in the portion coming into contact with said weld bead.

6. The resin-metal composite sealed container according to claim 5 , wherein said first metal foil and said second metal foil are bridged by said weld bead and the thickness-direction dimension of said first metal foil and said second metal foil near said weld bead is equal to the thickness-direction dimension of said first metal foil and said second metal foil in said heat seal part.

7. The resin-metal composite sealed container according to claim 1 , wherein said first metal foil and said second metal foil are bridged by said weld bead and the thickness-direction dimension of said first metal foil and said second metal foil near said weld bead is equal to the thickness-direction dimension of said first metal foil and said second metal foil in said heat seal part.

8. The resin-metal composite sealed container according to claim 1 , wherein a heat-sealing resin layer is laminated on at least the inner surface of said first metal foil and at least the inner surface of said second metal foil.

9. The resin-metal composite sealed container according to claim 1 , wherein said metallically sealed part is formed on the entire circumference of the end parts of said first metal foil and said second metal foil, excluding an electrode tab portion.

10. The resin-metal composite sealed container according to claim 1 , wherein said metal foil is stainless steel foil and said heat-sealing resin is a resin mainly composed of polypropylene.

11. The resin-metal composite sealed container according to claim 1 , wherein said metal foil has a thickness of 15 to 150 μm and said heat-sealing resin has a thickness of 10 to 200 μm.

12. A method for producing a metal-resin composite sealed container, comprising:
forming a container by subjecting end parts of metal foils having laminated on at least one surface thereof a heat-sealing resin to sealing by heat sealing, and
forming a metallically sealed part with a weld bead on the end faces of said metal foils by heating/welding an outer location than the heat sealed part of said container from a side of the end faces of the metal foils without removing the resin near a part to be welded before welding, the weld bead formed from the end faces of the metal foils to a location outside the heat sealed part with a space therebetween, wherein:
the melting point of the metal constituting said metal foils is higher by 300° C. or more than the thermal decomposition temperature of said heat-sealing resin,
the specific gravity of the metal constituting said metal foils is 5 or more, and
said weld bead is formed by a laser welding.

Assignees

• Nippon Steel & Sumikin Mat Co
• Honda Motor Co Ltd

Inventors

• Nose Koichi
• Nakatsuka Jun
• Matsuzawa Yutaka
• Murai Yu

Classifications

• H01G11/84 Primary

  Processes for the manufacture of hybrid or EDL capacitors, or components thereof · CPC title

• H01M50/131

  characterised by physical properties, e.g. gas permeability, size or heat resistance · CPC title

• H01M50/105

  Pouches or flexible bags · CPC title

• H01M50/133

  Thickness · CPC title

• H01M50/119

  Metals · CPC title