# US 2014/0196839 A1 · Battery pouch sheet edge insulation

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- Number: US 2014/0196839 A1
- Document ID: US20140196839A1
- Status: Published application
- Kind: A1
- Application number: 14/217,972
- Filed: 2014-03-18
- Published: 2014-07-17
- Earliest claimed: 2011-07-01
- Assignees: Apple Inc.
- Applicants: Apple Inc,
- Inventors: Loren L. Roy
- Web page: https://patentgrep.com/patent/US20140196839A1

## CPC

- H01M 10/04: Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence)
- B32B 15/085: comprising polyolefins
- B32B 15/088: comprising polyamides
- B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)}
- H01M 50/105: Pouches or flexible bags
- H01M 50/119: Metals
- H01M 50/121: Organic material
- H01M 50/124: having a layered structure
- H01M 50/133: Thickness
- H01M 50/178: for pouch or flexible bag cells
- H01M 50/186: characterised by the disposition of the sealing members
- H01M 50/193: Organic material
- H01M 50/55: on the same side of the cell
- H01M 50/557: Plate-shaped terminals
- H01M 50/562: characterised by the material
- B32B 2250/03: 3 layers
- B32B 2250/44: Number of layers variable across the laminate
- B32B 2307/31: Heat sealable
- B32B 2439/40: Closed containers
- H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence)
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- Y10T 29/49117: Conductor or circuit manufacturing
- Y10T 156/10: Methods of surface bonding and/or assembly therefor
- Y10T 156/1051: by folding
- Y10T 428/1359: Three or more layers [continuous layer]
- Y10T 428/24752: Laterally noncoextensive components
- Y10T 428/31681: Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
- Y10T 428/31725: Of polyamide
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A multi-layer laminate sheet suitable to form a battery pouch is described. The laminate sheet includes a core metal layer, a sealant laver, and an insulating layer. The sealant layer is bonded to one surface of the core metal layer, and the insulating layer is bonded to the other surface of the core metal layer. The insulating layer has a width that is greater than the width of the core metal layer, such that the insulating layer extends past two edges of the core metal layer. When the pouch is formed by folding the laminate sheet, the insulating layer protects the edges of the core metal layer of the laminate sheet from being exposed around the edges or sides of the pouch. Other embodiments are also described and claimed.

## Claims

### Claim 1

A method for manufacturing a multi-layer sheet suitable to form a battery pouch, comprising:
preparing a metal layer to have a predetermined width;
preparing an insulating layer to be wider than the metal layer;
positioning the insulating layer against the metal layer such that opposing edges of the insulating layer extend past opposing edges of the metal layer, respectively; and
bonding the metal layer to the insulating layer as positioned.

### Claim 2 (depends on 1)

The method of claim 1, wherein the insulating layer is approximately 400 microns wider than the metal layer.

### Claim 3 (depends on 1)

The method of claim 1, further comprising:
preparing a sealant layer to have approximately the predetermined width of the metal layer; and
bonding the sealant layer to the metal layer.

### Claim 4

A method for manufacturing a battery pouch for housing an electrode assembly, comprising:
forming a cavity in a multi-layer sheet, the multi-layer sheet having an insulating layer, a sealant layer, and a core metal layer sandwiched by the insulating and sealant layers, wherein the insulating layer is wider than the core metal layer so that a peripheral portion of the insulating layer extends beyond an exposed edge of the core metal layer;
positioning the electrode assembly within the cavity;
folding the multi-layer sheet to form a top section that covers a bottom section in which the cavity is formed; and
sealing the cavity in which the electrode assembly is contained by bonding the sealant layer in the top section to the sealant layer in the bottom section.

### Claim 5 (depends on 4)

The method of claim 4, further comprising:
folding the peripheral portion of the insulating layer over so as to cover the exposed edge of the core metal layer.

### Claim 6 (depends on 4)

The method of claim 4, wherein sealing the cavity comprises:
applying heat and pressure to the insulating layer in the top and bottom sections.