PACKAGING MATERIAL FOR CELL

• US 20160211490A1
• Filed: 09/18/2014
• Published: 07/21/2016
• Est. Priority Date: 09/20/2013
• Status: Active Grant

• Current Assignee: Dai Nippon Printing Company Limited
• Original Assignee: Dai Nippon Printing Company Limited
• Inventors: HASHIMOTO, Yohei, YAMASHITA, Rikiya
• Granted Patent: US 10,033,021 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2037/243 Coating
• CPC Class Codes: B32B 2038/0076 Curing, vulcanising, cross-linking
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2264/025 Acrylic resin particles, e.g. polymethyl methacrylate or ethylene-acrylate copolymers
• CPC Class Codes: B32B 2264/0292 Polyurethane particles
• CPC Class Codes: B32B 2264/10 Inorganic particles
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2274/00 Thermoplastic elastomer material
• CPC Class Codes: B32B 2307/4026 within the layer by addition of a colorant, e.g. pigments, dyes
• CPC Class Codes: B32B 2307/51 Elastic
• CPC Class Codes: B32B 2307/54 Yield strength; Tensile strength
• CPC Class Codes: B32B 2307/732 Dimensional properties
• CPC Class Codes: B32B 2307/746 Slipping, anti-blocking, low friction
• CPC Class Codes: B32B 2363/00 Epoxy resins
• CPC Class Codes: B32B 2375/00 Polyureas; Polyurethanes
• CPC Class Codes: B32B 2379/00 Other polymers having nitrogen, with or without oxygen or carbon only, in the main chain
• CPC Class Codes: B32B 2457/10 Batteries
• CPC Class Codes: B32B 2597/00 : Tubular articles, e.g. hoses, pipes
• CPC Class Codes: B32B 27/20 : using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/26 : using curing agents
• CPC Class Codes: B32B 27/28 : comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
• CPC Class Codes: B32B 27/308 : comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/36 : comprising polyesters
• CPC Class Codes: B32B 27/38 : comprising epoxy resins
• CPC Class Codes: B32B 27/40 : comprising polyurethanes
• CPC Class Codes: B32B 27/42 : comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
• CPC Class Codes: B32B 37/02 : characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
• CPC Class Codes: B32B 37/24 : with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate B32B37/15 takes precedence
• CPC Class Codes: B32B 7/14 : applied in spaced arrangements, e.g. in stripes
• CPC Class Codes: H01M 50/119 : Metals
• CPC Class Codes: H01M 50/121 : Organic material
• CPC Class Codes: H01M 50/124 : having a layered structure
• CPC Class Codes: H01M 50/1245 : characterised by the external coating on the casing
• CPC Class Codes: H01M 50/129 : with two or more layers of only organic material
• CPC Class Codes: H01M 50/131 : characterised by physical properties, e.g. gas permeability, size or heat resistance
• CPC Class Codes: H01M 50/133 : Thickness
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries

Abstract

A packaging material for a cell including a laminated article having at least a coating layer, a barrier layer, and a sealant layer in the stated order, wherein: the coating layer has at least three layers including a first, second and third coating layer, and is disposed so that the first coating layer is positioned as the outermost layer and the third coating layer is positioned on the barrier-layer-side; and the first coating layer, the second coating layer, and the third coating layer are formed from a cured product of a resin composition containing a heat-curing resin and a curing accelerator so as to sufficiently exhibit a specific hardness, whereby the thickness can be reduced, exceptional chemical resistance, moldability, and inter-layer adhesion between the barrier layer and the coating layer can be obtained, and the lead time can be reduced to enable an improvement in production efficiency.

Claims

1. A battery packaging material which comprises a laminated body including at least a coating layer, a barrier layer and a sealant layer in this order, wherein

the coating layer has a multilayer structure having two or more layers, and

the layers that form the coating layer are each formed of a cured product of a resin composition containing a thermosetting resin and a curing accelerator.

2. The battery packaging material according to claim 1, wherein the layers that form the coating layer each have an elastic modulus of 1500 to 6000 MPa.

3. The battery packaging material according to claim 1, wherein at least one of the layers that form the coating layer has an elastic modulus of 2500 to 6000 MPa.

4. The battery packaging material according to claim 1, wherein the coating layer has a two-layer structure, and

among the layers that form the coating layer, the layer that is in contact with the barrier layer has an elastic modulus of 1500 to 6000 MPa, and the outermost layer has an elastic modulus of 3000 to 6000 MPa.

5. The battery packaging material according to claim 1, wherein the coating layer has a three-layer structure, and

among the layers that form the coating layer, the layer that is in contact with the barrier layer has an elastic modulus of 1500 to 6000 MPa, the layer positioned in the middle between the layer that is in contact with the barrier layer and the outermost layer has an elastic modulus of 1500 to 6000 MPa, and the outermost layer has an elastic modulus of 3000 to 6000 MPa.

6. The battery packaging material according to claim 1, wherein in the coating layer, the outermost layer is formed of a cured product of a resin composition containing a thermosetting resin, a curing accelerator and a slipping agent.

7. 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.

8. The battery packaging material according to claim 7, wherein the resin composition to be used for formation of at least one layer in the coating layer contains an inorganic pigment.

9. The battery packaging material according to claim 1, wherein the layers that form the coating layer each have a thickness of 1 to 5 μ

m.

10. The battery packaging material according to claim 1, wherein the battery packaging material has a thickness of 40 to 120 μ

m as a whole.

11. 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 and an alkyd resin.

12. 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.

14. A battery comprising a battery element which includes 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.

24. The battery packaging material according to claim 14, wherein the battery packaging material has a thickness of 40 to 120 μ

m as a whole.

13. A method for producing a battery packaging material,

the method comprising a coating layer forming step of applying a resin composition, which contains a thermosetting resin and a curing accelerator, to a barrier layer and heating and thereby curing the resin composition repeatedly two or more times to form on the barrier layer a coating layer having a multilayer structure having two or more layers, wherein

before, during or after the coating layer forming step, a sealant layer is laminated on a surface of the barrier layer on a side opposite to a surface on which the coating layer is laminated.

15. A battery packaging material which comprises a laminated body including at least a coating layer, a barrier layer and a sealant layer in this order, wherein

the coating layer includes a single layer or multiple layers formed of a cured product of a resin composition containing a thermosetting resin and a curing accelerator, and

the resin composition to be used for formation of at least one layer in the coating layer contains reactive resin beads.

16. A battery packaging material according to claim 15, 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 arranged in this order from the outermost surface side toward the barrier layer side, and the resin composition to be used for formation of the second coating layer contains the reactive resin beads.

17. The battery packaging material according to claim 15, wherein the reactive resin beads are urethane resin beads or acrylic resin beads having a functional group.

18. The battery packaging material according to claim 15, wherein the refractive index of the reactive resin beads is 1.3 to 1.8.

19. The battery packaging material according to claim 16, wherein the resin composition to be used for formation of at least one layer in the coating layer contains a pigment and/or dye.

20. The battery packaging material according to claim 19, wherein the resin composition to be used for formation of at least one layer in the coating layer contains an inorganic pigment.

21. The battery packaging material according to claim 15, 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 and an alkyd resin.

22. The battery packaging material according to claim 15, 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.

23. The battery packaging material according to claim 15, wherein the barrier layer is a metal foil.

26. 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 15.

25. A method for producing a battery packaging material,

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 thereby curing the resin composition, wherein

the coating layer forming step is carried out one or more times, and the resin composition containing reactive resin beads is used at least one time in the coating layer forming step, and

before or after the coating layer forming step, a sealant layer is laminated on a surface of the barrier layer on a side opposite to a surface on which the coating layer is laminated.