Power storage device packaging material and power storage device including the same

Patent metadata

Field	Value
Publication number	US-2022376330-A1
Application number	US-202217880993-A
Country	US
Kind code	A1
Filing date	Aug 4, 2022
Priority date	Feb 7, 2020
Publication date	Nov 24, 2022
Grant date	—

Abstract

A power storage device packaging material including at least a substrate layer, an outer adhesive layer, a barrier layer, and a sealant layer in this order, wherein a difference in linear expansion coefficient at 20 to 150° C. between the substrate layer and the barrier layer is 20×10−6/° C. or less in both an MD direction and a TD direction.

First claim

What is claimed is:

1 . A power storage device packaging material comprising: at least a substrate layer; an outer adhesive layer; a barrier layer; and a sealant layer in this order, wherein
a difference in linear expansion coefficient at 20 to 150° C. between the substrate layer and the barrier layer is 20×10 −6 /° C. or less in both an MD direction and a TD direction.

2 . The power storage device packaging material of claim 1 , wherein
the linear expansion coefficient at 20 to 150° C. of the substrate layer is −7×10 −6 /° C. or more and 53×10 −6 /° C. or less in both the MD direction and the TD direction.

3 . A power storage device packaging material comprising: at least a substrate layer; an outer adhesive layer; a barrier layer; and a sealant layer in this order, wherein
the substrate layer has a single-layer structure, and when a sample with a length of 20 mm and a width of 10 mm is prepared from the substrate layer, and the sample is subjected to a creep test in which a constant load of 5 N is continuously applied to the sample in a 150° C. environment for 3 hours, an amount of elongation of the sample in an MD direction and an amount of elongation of the sample in a TD direction are both 3 mm or less.

4 . The power storage device packaging material of claim 3 , wherein
a difference between the amount of elongation of the sample in the MD direction and the amount of elongation of the sample in the TD direction is 2 mm or less.

5 . A power storage device packaging material having a structure in which at least a substrate layer, an outer adhesive layer, a barrier layer, and a sealant layer are laminated in this order, wherein
a ratio between a volume resistivity in a 23° C. environment and a volume resistivity in a 150° C. environment, which is a volume resistivity in a 23° C. environment/a volume resistivity in a 150° C. environment, of the substrate layer is 1×10° to 1×10 3 .

6 . The power storage device packaging material of claim 5 , wherein
the volume resistivity in a 23° C. environment of the substrate layer is 1×10 13 Ω·m or more.

7 . The power storage device packaging material of claim 5 , wherein
the volume resistivity in a 150° C. environment of the substrate layer is 1×10 12 Ω·m or more.

8 . The power storage device packaging material of claim 5 , wherein
the substrate layer has a thickness of 35 μm or less, and a value obtained by multiplying the volume resistivity in a 150° C. environment of the substrate layer by the thickness of the substrate layer is 5×10 13 ∩·m×μm or more.

9 . The power storage device packaging material of claim 1 , wherein
the barrier layer is an aluminum foil.

10 . The power storage device packaging material of claim 1 , wherein
the substrate layer is a biaxially stretched film.

11 . The power storage device packaging material of claim 1 , wherein
the substrate layer is a semi-aromatic polyamide film.

12 . The power storage device packaging material of claim 1 , wherein
the outer adhesive layer is a layer composed of a polyester urethane adhesive.

13 . The power storage device packaging material of claim 1 , wherein
the outer adhesive layer has a thickness of 1 to 10 μm.

14 . The power storage device packaging material of claim 1 , wherein
the power storage device packaging material is used for a solid-state battery.

15 . A power storage device comprising:
a power storage device body; a current output terminal that extends from the power storage device body; and the power storage device packaging material of claim 1 , the power storage device packaging material sandwiching the current output terminal and housing the power storage device body.

16 . The power storage device of claim 15 , wherein
the power storage device is an all-solid-state battery.

Assignees

• Toppan Inc

Inventors

• Muraki Takuya

Classifications

• H01G11/78 Primary

  Cases; Housings; Encapsulations; Mountings · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/0562

  Solid materials · CPC title

• H01M50/178

  for pouch or flexible bag cells · CPC title

• B32B2457/10

  Batteries · CPC title