ELECTROCHEMICAL CELL PACKAGING MATERIAL

• US 20140335403A1
• Filed: 11/08/2012
• Published: 11/13/2014
• Est. Priority Date: 11/11/2011
• Status: Active Grant

• Current Assignee: Dai Nippon Printing Company Limited
• Original Assignee: Dai Nippon Printing Company Limited
• Inventors: Akita, Hirohisa, Okushita, Masataka, Yokota, Kazuhiko, Watanabe, Daisuke
• Granted Patent: US 10,673,030 B2
• Time in Patent Office: Days
• US Class Current: 429/176
• CPC Class Codes: B32B 15/085 comprising polyolefins
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/38 comprising epoxy resins
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: H01M 10/052 Li-accumulators
• 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 50/133 Thickness
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Provided is an electrochemical cell packaging material with excellent electrolyte resistance. An electrochemical cell packaging material includes the following in a laminated structure: a substrate layer that, at a minimum, includes resin film; a protective layer that is arranged as the outermost layer and protects the substrate layer; a thermal adhesion layer that is arranged as the innermost layer and which includes thermal adhesion resin; and a barrier layer that includes metal foil and is arranged between the substrate layer and the thermal adhesion layer. The protective layer is formed of an epoxy resin that has bisphenol A or bisphenol F as an element in the backbone.

Claims

1. An electrochemical cell packaging material comprising, as layers laminated together, at least:

a base material layer formed of a resin film;

a protective layer arranged as an outer layer, for protecting the base material layer;

a thermally adhesive layer arranged as an innermost layer and formed of a thermally adhesive resin; and

a barrier layer arranged between the base material layer and the thermally adhesive layer and formed of a metal foil,

wherein the protective layer is formed of an epoxy resin having bisphenol A or bisphenol F as skeletal units.

2. The electrochemical cell packaging material according to claim 1,

wherein

the base material layer and the barrier layer are bonded together by dry lamination with an adhesive containing a pigment.

5. The electrochemical cell packaging material according to claim 2,

wherein the pigment comprises carbon black.

8. The electrochemical cell packaging material according to claim 1,

wherein a slipping agent layer is provided on a surface of the protective layer.

9. The electrochemical cell packaging material according to claim 8,

wherein the slipping agent layer comprises an aliphatic amide-based resin.

12. The electrochemical cell packaging material according to claim 2,

wherein a slipping agent layer is provided on a surface of the protective layer.

3. An electrochemical cell packaging material comprising, as layers laminated together, at least:

a base material layer formed of a resin film;

a protective layer arranged as an outer layer, for protecting the base material layer;

a thermally adhesive layer arranged as an innermost layer and formed of a thermally adhesive resin; and

a barrier layer arranged between the base material layer and the thermally adhesive layer and formed of a metal foil,

wherein

the base material layer and the barrier layer are bonded together by dry lamination with an adhesive containing a pigment, and

the protective layer is formed of at least one resin selected from the group consisting of polyvinylidene chloride, vinylidene chloride-vinyl chloride copolymer, anhydrous maleic acid-modified polypropylene, polyester resin, phenol resin, fluorine resin, cellulose ester, olefin resin, urethane resin, and acrylic resin, the protective layer comprising a fine-particle filler.

4. The electrochemical cell packaging material according to claim 3,

wherein the protective layer is formed of a resin comprising polyfunctional urethane acrylate having a functional group number of 5 or more with respect to acryloyl group and containing a photopolymerization initiator.

7. The electrochemical cell packaging material according to claim 3,

wherein the fine-particle filler comprises silica.

10. The electrochemical cell packaging material according to claim 3,

wherein the pigment comprises carbon black.

11. The electrochemical cell packaging material according to claim 4,

wherein the pigment comprises carbon black.

13. The electrochemical cell packaging material according to claim 3,

wherein a slipping agent layer is provided on a surface of the protective layer.

6. (canceled)