Terminal resin film of fully-solid-state battery and fully-solid state battery

Patent metadata

Field	Value
Publication number	US-2024396136-A1
Application number	US-202418791273-A
Country	US
Kind code	A1
Filing date	Jul 31, 2024
Priority date	Feb 2, 2022
Publication date	Nov 28, 2024
Grant date	—

Abstract

A terminal resin film of a fully-solid-state battery is adhered by heat-sealing to an outer peripheral surface of a portion of a metal terminal that is electrically connected to a battery body constituting a fully-solid-state battery, wherein a moisture content is 2,700 ppm by mass or less. The terminal resin film may also be formed of a multilayer film having an insulating layer and a sealant layer provided on at least one surface of the insulating layer.

First claim

What is claimed is:

1 . A terminal resin film of a fully-solid-state battery, comprising:
a terminal resin film that is adhered by a heat seal to an outer peripheral surface of a portion of a metal terminal that is electrically connected to a battery body constituting the fully-solid-state battery, wherein the terminal resin film has a moisture content is 2,700 ppm by mass or less.

2 . The terminal resin film of a fully-solid-state battery of claim 1 , wherein
the moisture content is 2,000 ppm by mass or less.

3 . The terminal resin film of a fully-solid-state battery of claim 1 , wherein
the moisture content is 200 ppm by mass or more.

4 . The terminal resin film of a fully-solid-state battery of claim 1 , comprising
a multilayer film having an insulating layer, and a sealant layer provided on at least one surface of the insulating layer.

5 . The terminal resin film of a fully-solid-state battery of claim 4 , wherein
in the multilayer film, the sealant layer is provided on both surfaces of the insulating layer.

6 . The terminal resin film of a fully-solid-state battery of claim 4 , wherein
of the multilayer film, the sealant layer is an acid-modified polyolefin resin layer.

7 . The terminal resin film of a fully-solid-state battery of claim 1 , which is formed of a polyolefin film containing a polyolefin-based resin, or a polyester film containing a polyester-based resin.

8 . The terminal resin film of a fully-solid-state battery of claim 1 , wherein
a melting point is 250° C. or lower.

9 . The terminal resin film of a fully-solid-state battery of claim 1 , wherein
a melting point is 150° C. or higher.

10 . A fully-solid-state battery, comprising:
a battery body containing a solid electrolyte; a metal terminal that is electrically connected to the battery body; a packaging bag that holds the metal terminal and accommodates the battery body; and a terminal resin film that is adhered by a heat seal to an outer peripheral surface of a portion of the metal terminal, wherein the terminal resin film is formed of the terminal resin film of claim 1 .

11 . The fully-solid-state battery of claim 10 , wherein
the solid electrolyte is a sulfide-based solid electrolyte.

Assignees

• Toppan Holdings Inc

Inventors

• Muraki Takuya

Classifications

• H01M50/548

  on opposite sides of the cell · CPC title

• H01M50/557

  Plate-shaped terminals · CPC title

• H01M50/105

  Pouches or flexible bags · CPC title

• H01M50/121

  Organic material · CPC title

• H01M50/119

  Metals · CPC title