Packaging material for cell

Patent metadata

Field	Value
Publication number	US-2017229685-A1
Application number	US-201515514655-A
Country	US
Kind code	A1
Filing date	Sep 28, 2015
Priority date	Sep 30, 2014
Publication date	Aug 10, 2017
Grant date	—

Abstract

A film-shaped packaging material for a cell in which a coating layer is provided as the outermost layer instead of a substrate layer and an adhesive layer in a conventional film-shaped packaging material for a cell, thereby making it possible to produce a thinner film; wherein the packaging material is provided with exceptional moldability and insulation performance and enables lead time to be reduced. The packaging material is a laminate having at least a coating layer, a barrier layer, and a sealant layer in the stated order, the coating layer including a single- or multiple-layer configuration formed by a cured product of a resin composition containing a heat-curable resin and curing accelerator, the laminate having a piercing strength of at least 5 N, as measured in compliance with JIS 1707:1997, and the coating layer having a breakdown voltage of at least 1.0 kV, as measured in compliance with JIS C2110-1.

First claim

1 . A battery packaging material which is a laminate comprising at least a coating layer, a barrier layer and a sealant layer in this order,
wherein the coating layer is configured to have a single layer or multiple layers formed of a cured product of a resin composition containing a thermosetting resin and a curing accelerator, the laminate has a piercing strength of 5 N or more as measured in accordance with JIS 1707:1997, and the coating layer has a dielectric breakdown voltage of 1.0 kV or more as measured in accordance with JIS C2110-1.

2 . The battery packaging material according to claim 1 , wherein the coating layer has a three-layer structure in which a first coating layer, a second coating layer and a third coating layer are laminated in this order from an outermost surface side to the barrier layer side.

3 . The battery packaging material according to claim 1 , wherein the resin composition to be used for formation of at least one layer in the coating layer contains a pigment and/or dye.

4 . The battery packaging material according to claim 3 , wherein the resin composition to be used for formation of at least one layer in the coating layer contains an inorganic pigment.

5 . The battery packaging material according to claim 1 , wherein the thermosetting resin is at least one selected from the group consisting of an epoxy resin, an amino resin, an acrylic resin, a urethane resin, a phenol resin, an unsaturated polyester resin, a polyimide resin and an alkyd resin.

6 . The battery packaging material according to claim 1 , wherein the curing accelerator is at least one selected from the group consisting of an amidine compound, a carbodiimide compound, a ketimine compound, a hydrazine compound, a sulfonium salt, a benzothiazolium salt and a tertiary amine compound.

7 . The battery packaging material according to claim 1 , wherein the barrier layer is metal foil.

8 . The battery packaging material according to claim 1 , wherein the battery packaging material has a thickness of 40 to 120 μm as a whole.

9 . A method for producing the battery packaging material according to claim 1 , the method comprising:
a coating layer forming step of applying a resin composition, which contains a thermosetting resin and a curing accelerator, onto a barrier layer and heating and curing the resin composition; and a step of laminating a sealant layer on a surface of the barrier layer on a side opposite to a surface on which the coating layer is laminated, before or after the coating layer forming step.

10 . A battery comprising a battery element including at least a positive electrode, a negative electrode and an electrolyte, the battery element being stored in the battery packaging material according to claim 1 .

11 . A method for producing a battery, the method comprising:
a step of storing in a battery packaging material a battery element including at least a positive electrode, a negative electrode and an electrolyte, wherein the battery packaging material is a laminate including at least a coating layer, a barrier layer and a sealant layer in this order, the coating layer is configured to have a single layer or multiple layers formed of a cured product of a resin composition containing a thermosetting resin and a curing accelerator, the laminate has a piercing strength of 5 N or more as measured in accordance with JIS 1707:1997, and the coating layer has a dielectric breakdown voltage of 1.0 kV or more as measured in accordance with JIS C2110-1.

12 . Use, as a battery packaging material, of a laminate comprising at least a coating layer, a barrier layer and a sealant layer in this order,
wherein the coating layer is configured to have a single layer or multiple layers formed of a cured product of a resin composition containing a thermosetting resin and a curing accelerator, the laminate has a piercing strength of 5 N or more as measured in accordance with JIS 1707:1997, and the coating layer has a dielectric breakdown voltage of 1.0 kV or more as measured in accordance with JIS C2110-1.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Hashimoto Youhei
• Yamashita Rikiya
• Ueda Shunsuke

Classifications

• B32B27/285

  comprising polyethers · CPC title

• B32B2250/02

  2 layers · CPC title

• B32B15/092

  comprising epoxy resins · CPC title

• B32B15/09

  comprising polyesters · CPC title

• B32B25/16

  comprising polydienes {homopolymers} or poly-halodienes {homopolymers (B32B25/12 takes precedence)} · CPC title