Packaging material for power storage device

Patent metadata

Field	Value
Publication number	US-11081748-B2
Application number	US-201715834275-A
Country	US
Kind code	B2
Filing date	Dec 7, 2017
Priority date	Jun 10, 2015
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

Packaging material for a power storage device, comprising at least a substrate layer, an adhesive layer, a metal foil layer and a sealant layer wherein the sealant layer contains an inorganic filler and an occupying ratio of the inorganic filler relative to the total thickness of the sealant layer is 5 to 50%, and also to a packaging material for a power storage device, comprising a substrate layer, a barrier layer and also to a packaging material for power storage device, which comprises a substrate layer, a barrier layer and a sealant layer arranged in this order wherein the barrier layer is made of a metal foil and has a corrosion inhibition treatment layer at least at a side of the sealant layer, and the sealant layer is formed directly on the corrosion inhibition layer, has a thickness of 5 to 30 μm, and contains a high melting point material.

First claim

What is claimed is:

1. A packaging material for power storage device, comprising:
a substrate layer,
an adhesive layer,
a metal foil layer, and
a sealant layer, and,
wherein the sealant layer contains an inorganic filler and an occupying ratio of the inorganic filler to a total thickness of the sealant layer in a section along the direction of lamination is 20% to 30% wherein the sealant layer is a three-layer structure comprising a first filler-free layer, an inorganic filler-containing layer and a second filler-free layer, wherein the inorganic filler-containing layer is sandwiched between the first filler-free layer and the second filler-free layer, wherein the inorganic filler-containing layer comprises the inorganic filler, and wherein each of the first-filler free layer and the second-filler free layer is free of the inorganic filler, wherein the first filler-free layer faces the metal foil layer, the first filler-free layer consists of an acid-modified polyolefin resin, and wherein the inorganic filler containing layer has a thickness of not less than 50% of the total thickness of the sealant layer.

2. The packaging material for power storage device of claim 1 , wherein the inorganic filler-containing layer is one made of an acid-modified polyolefin resin.

3. The packaging material for power storage device of claim 1 , wherein the inorganic filler is a surface-treated.

4. The packaging material for power storage device of claim 1 , wherein the inorganic filler is an amorphous inorganic filler.

5. The packaging material for power storage device of claim 1 , wherein the inorganic filler comprises a primary filler and a secondary filler coagulated to the primary filler, wherein a shape of the primary filler is selected from a sphere, a plate, a needle, a fiber, or a column.

6. The packaging material for power storage device of claim 1 , wherein the inorganic filler is a high melting point material filler and a number of the inorganic filler per unit volume of the sealant layer is 10,000 to 10,000,000 particles/cm 3 , wherein the high melting point material has a melting point of not lower than 220° C.

Assignees

• Toppan Printing Co Ltd

Inventors

• Dai hiroshi
• IMAMOTO Junya
• OGIHARA Yu
• Suzuta Masayoshi

Classifications

• B32B15/20 Primary

  comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} · CPC title

• H01M50/105

  Pouches or flexible bags · CPC title

• H01M50/145

  for protecting against corrosion · CPC title

• H01M50/186

  characterised by the disposition of the sealing members · CPC title

• H01M50/193

  Organic material · CPC title