Outer covering material for electricity storage devices, and electricity storage device

Patent metadata

Field	Value
Publication number	US-2020013999-A1
Application number	US-201816482644-A
Country	US
Kind code	A1
Filing date	Jan 29, 2018
Priority date	Feb 8, 2017
Publication date	Jan 9, 2020
Grant date	—

Abstract

A packaging material for a power storage device, having a structure in which at least a substrate layer, a metallic foil layer with an anti-corrosion treatment layer being disposed on one face or both faces thereof, an adhesive layer or an adhesive resin layer, and a sealant layer are laminated in this order, wherein at least one layer of the adhesive resin layer and the sealant layer comprises a polyolefin-based resin, and an additive compound with an SP value of 11.0 (cal/cm3)1/2 or more and 20.0 (cal/cm3)1/2 or less.

First claim

1 . A packaging material for a power storage device, having a structure in which at least:
a substrate layer; a metallic foil layer with an anti-corrosion treatment layer being disposed on one face or both faces thereof; an adhesive layer or an adhesive resin layer; and a sealant layer are laminated in this order, wherein at least one layer of the adhesive resin layer and the sealant layer comprises a polyolefin-based resin, and an additive compound with an SP value of 11.0 (cal/cm 3 ) 1/2 or more and 20.0 (cal/cm 3 ) 1/2 or less.

2 . The packaging material for a power storage device according to claim 1 , wherein a molecular weight of the additive compound is 100 or more and 6000 or less.

3 . The packaging material for a power storage device according to claim 1 ,
wherein the polyolefin-based resin comprises a polypropylene-based resin, and wherein the sealant layer comprises at least one of a propylene-α-olefin copolymer as a compatible elastomer having compatibility with the polypropylene-based resin, and an ethylene-α-olefin copolymer as an incompatible elastomer not having compatibility with the polypropylene-based resin.

4 . The packaging material for a power storage device according to claim 1 , wherein the adhesive resin layer comprises an acid-modified polypropylene, and a polypropylene with an atactic structure or a propylene-α-olefin copolymer with an atactic structure.

5 . The packaging material for a power storage device according to claim 1 , wherein the adhesive layer comprises an acid-modified polyolefin, and at least one curing agent selected from the group consisting of a multifunctional isocyanate compound, a glycidyl compound, a compound having a carboxy group, a compound having an oxazoline group and a carbodiimide compound.

6 . A power storage device comprising:
a battery element comprising electrodes; leads extending from the electrodes; a vessel accommodating the battery element; and an electrolytic solution loaded in the vessel,
wherein the vessel is formed such that the sealant layer is on the inner side with respect to the packaging material for a power storage device according to claim 1 .

7 . The power storage device according to claim 6 , wherein a difference between an SP value of the electrolytic solution, and an SP value of the additive compound in the packaging material for a power storage device is 2.0 (cal/cm 3 ) 1/2 or more.

Assignees

• Toppan Printing Co Ltd

Inventors

• IMAMOTO Junya
• OGIHARA Yu
• Suzuta Masayoshi

Classifications

• B32B15/085 Primary

  comprising polyolefins · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/04

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title

• H01G11/80

  Gaskets; Sealings · CPC title

• H01M2/08 Primary

  Electricity · mapped topic