Terminal coating resin film and power storage device using the same

Patent metadata

Field	Value
Publication number	US-2021091435-A1
Application number	US-202017110862-A
Country	US
Kind code	A1
Filing date	Dec 3, 2020
Priority date	Jun 27, 2018
Publication date	Mar 25, 2021
Grant date	—

Abstract

A terminal coating resin film used for sealing current output terminals in power storage devices or power generation devices. The terminal coating resin film comprises a resin composition having adhesion to the current output terminals. The resin composition contains at least one of a thermosetting resin and a thermoplastic resin having a melting point of 160° C. or higher and does not contain any thermoplastic resin having a melting point of less than 160° C.

First claim

What is claimed is:

1 . A terminal coating resin film that seals a current output terminal, comprising:
a resin composition having adhesion to the current output terminal; and, the resin composition contains at least one of a thermosetting resin and a thermoplastic resin having a melting point of 160° C. or higher and does not contain any thermoplastic resin having a melting point of less than 160° C.

2 . The terminal coating resin film of claim 1 , wherein the power storage device is a fully solid-state battery.

3 . The terminal coating resin film of claim 1 , wherein
the thermosetting resin is at least one selected from a group consisting of polyimide resins, phenol resins, urea resins, melamine resins, unsaturated polyester resins, urethane resins, allyl resins, epoxy resins, furan resins, and silicone resins; and the thermoplastic resin is at least one selected from a group consisting of polyester resins, nylons, polyvinyl alcohol resins, polyvinylidene chloride, polyamide resins, polybutylene terephthalate resins, polyphenylene sulfide, polyetherimide, polysulfone, fluororesins, polyamide imide, and acetyl cellulose.

4 . The terminal coating resin film of claim 1 , wherein the terminal coating resin film has a single layer structure comprising the resin composition.

5 . The terminal coating resin film of claim 4 , wherein the resin composition is one selected from a group consisting of polyester resins, polyphenylene sulfide, urethane resins, and epoxy resins.

6 . The terminal coating resin film of claim 1 , wherein
the terminal coating resin film has a multilayer structure comprising a first layer comprising either a polyester resin having a melting point in a range of 170° C. to 280° C. or polyphenylene sulfide having a melting point in a range of 260° C. to 290° C., and a second layer comprising either a thermosetting resin or a thermoplastic resin having a melting point in a range of 160° C. to 280° C.; and the second layer is formed on a surface of the first layer facing the current output terminal.

7 . The terminal coating resin film of claim 6 , wherein
the first layer comprises polyethylene terephthalate; and the second layer comprises polyethylene terephthalate having a low melting point.

8 . The terminal coating resin film of claim 7 , wherein
the polyethylene terephthalate having a low melting point contains structural units derived from ethylene glycol, structural units derived from a terephthalic acid, and other structural units; and the other structural units are derived from a dihydric alcohol component which is at least one selected from a group consisting of neopentyl glycol, 1,4-butanediol, and diethylene glycol.

9 . The terminal coating resin film of claim 7 , wherein
the polyethylene terephthalate having a low melting point contains structural units derived from ethylene glycol, structural units derived from a terephthalic acid, and other structural units; and the other structural units are derived from an acid component which is at least one selected from a group consisting of an isophthalic acid, adipic acid, and sebacic acid.

10 . The terminal coating resin film of claim 6 , wherein, when the first layer has a melting point expressed by SA and the second layer has a melting point expressed by SB, a difference SA-SB is 10° C. or more.

11 . The terminal coating resin film of claim 6 , further comprising:
a third layer formed on a surface of the first layer facing away from the surface on which the second layer is formed; and the third layer comprises a thermosetting resin or a thermoplastic resin having a melting point in a range of 160° C. to 280° C.

12 . The terminal coating resin film of claim 1 , wherein
the terminal coating resin film has a multilayer structure including a first layer comprising a thermosetting resin, and a thermosetting resin layer formed on at least one surface of the first layer; and the thermosetting resin layer has fluidity higher than that of the thermosetting resin forming the first layer.

13 . A power storage device, comprising:
a power storage device body; a current output terminal extended from the power storage device body; a packaging material sandwiching the current output terminal between surfaces thereof and holding the power storage device body therein; and the terminal coating resin film of claim 1 disposed between the current output terminal and the packaging material.

14 . The power storage device of claim 13 , wherein the power storage device is a fully solid-state battery.

Assignees

• Toppan Printing Co Ltd

Inventors

• Muraki Takuya

Classifications

• H01M50/197 Primary

  having a layered structure · CPC title

• H01M50/178

  for pouch or flexible bag cells · CPC title

• H01M50/198 Primary

  characterised by physical properties, e.g. adhesiveness or hardness · CPC title

• H01M50/193

  Organic material · CPC title

• H01M50/188

  the sealing members being arranged between the lid and terminal · CPC title