Packaging material for batteries

Patent metadata

Field	Value
Publication number	US-2017229684-A1
Application number	US-201515514637-A
Country	US
Kind code	A1
Filing date	Sep 24, 2015
Priority date	Sep 30, 2014
Publication date	Aug 10, 2017
Grant date	—

Abstract

Provided is a packaging material for batteries, which has excellent insulating properties. A packaging material for batteries, which is formed of a laminate that is obtained by sequentially laminating at least a base layer, a bonding layer, a metal layer and a sealant layer, and wherein the base layer comprises a resin layer A that is formed of a thermoplastic resin having a volume resistivity of 1×10 15 Ω·cm or more.

First claim

1 . A battery packaging material comprising a laminate including at least a base material layer, an adhesive layer, a metal layer and a sealant layer laminated in this order,
the base material layer including a resin layer A formed of a thermoplastic resin having a volume resistivity of 1×10 15 Ω·cm or more.

2 . The battery packaging material according to claim 1 , wherein a thickness of the resin layer A is in a range of 9 to 25 μm.

3 . The battery packaging material according to claim 1 , wherein the resin layer A is formed of at least one of polyethylene terephthalate and polybutylene terephthalate.

4 . The battery packaging material according to claim 1 , wherein a thickness of the laminate is 125 μm or less.

5 . A battery packaging material comprising a laminate including at least a base material layer, a metal layer and a sealant layer laminated in this order,
wherein a thickness of the sealant layer is not less than 3 times of a thickness of the base material layer.

6 . A battery packaging material comprising a laminate including at least a base material layer, a metal layer, an adhesive layer and a sealant layer laminated in this order,
wherein a total thickness of the adhesive layer and the sealant layer is not less than 3 times of a thickness of the base material layer.

7 . The battery packaging material according to claim 5 , wherein a thickness of the laminate is 160 μm or less.

8 . The battery packaging material according to claim 5 , wherein the base material layer is formed of a stretched resin film, and the sealant layer is formed of an unstretched resin film.

9 . The battery packaging material according to claim 5 , wherein the base material layer is formed of at least one of a polyamide resin and a polyester resin.

10 . The battery packaging material according to claim 1 , wherein the metal layer is formed of aluminum foil.

11 . The battery packaging material according to claim 1 , wherein at least one surface of the metal layer is subjected to a chemical conversion treatment.

12 . The battery packaging material according to claim 1 , which is a packaging material for a secondary battery.

13 . A battery comprising a battery element including at least a positive electrode, a negative electrode and an electrolyte, the battery element being stored in the battery packaging material according to claim 1 .

Assignees

• Dainippon Printing Co Ltd

Inventors

• Yasuda Daisuke
• Takahagi Atsuko
• Yamashita Rikiya
• Nakamura Shinichiro

Classifications

• H01M50/186

  characterised by the disposition of the sealing members · CPC title

• H01M50/193

  Organic material · CPC title

• H01M50/133

  Thickness · CPC title

• H01M50/129

  with two or more layers of only organic material · CPC title

• H01M50/119

  Metals · CPC title