# US 12,603,285 B2 · Battery including electrode assembly and electronic device including the same

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- Number: US 12,603,285 B2
- Document ID: US12603285B2
- Status: Granted
- Kind: B2
- Application number: 17/941,553
- Filed: 2022-09-09
- Published: 2023-03-02
- Granted: 2026-04-14
- Earliest claimed: 2021-09-01
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Sinyoung Jung; Jonggyu Park; Yeonil Lee
- Web page: https://patentgrep.com/patent/US12603285B2

## CPC

- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 4/667: {in the form of layers, e.g. coatings}
- H01M 4/70: characterised by shape or form
- H01M 10/04: Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence)
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
- H01M 10/42: Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (H01M10/60 takes precedence)
- H01M 50/105: Pouches or flexible bags
- 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 50/244: Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
- H01M 50/247: specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
- H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes
- H01M 50/461: {with adhesive layers between electrodes and separators}
- H01M 50/586: inside the batteries, e.g. incorrect connections of electrodes
- H01M 50/59: characterised by the protection means
- H04M 1/02: Constructional features of telephone sets
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/028: {Positive electrodes}
- H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- 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

## Abstract

A battery includes an electrode assembly including a cathode including a cathode collector, a cathode active material layer provided in a first region of a surface of the cathode collector, and an insulating layer provided in a second region of the surface of the cathode collector and adjacent to the cathode active material layer, an anode including an anode collector and an anode active material layer provided in a region of a surface of the anode collector and a separator provided between the cathode and the anode. At least a portion of the separator is configured to be attached to at least a portion of the insulating layer.

## Claims

### Claim 1

A battery comprising:
an electrode assembly comprising:
a cathode comprising:
a cathode collector,
a cathode active material layer provided in a first region of a surface of the cathode collector, and
an insulating layer provided in a second region of the surface of the cathode collector and adjacent to the cathode active material layer;
an anode comprising an anode collector and an anode active material layer provided in a region of a surface of the anode collector; and
a separator provided between the cathode and the anode,
wherein a first portion of the separator is adhered to a first surface of the insulating layer,
wherein a second portion of the separator is spaced apart from the cathode active material layer in a first direction, and
wherein the first surface of the insulating layer is at a level that is the same as a level of a surface of the cathode active material layer in a second direction intersecting the first direction.

### Claim 2 (depends on 1)

The battery of claim 1, wherein the cathode collector has a flat sheet shape, and
wherein the second region corresponds to an edge portion of the cathode collector.

### Claim 3 (depends on 1)

The battery of claim 1, wherein the second region of the surface of the cathode corresponds to a region of the surface of the cathode collector that is different from the first region.

### Claim 4 (depends on 1)

The battery of claim 1, wherein an area ratio of the first region to the second region is about 10:1 to about 50:1.

### Claim 5 (depends on 1)

The battery of claim 1, wherein the insulating layer comprises at least one of fiber resin, plastic nonwoven fabric, alumina (Al2O3), magnesium oxide (MgO), silica (SiO2), boehmite, barium titanate (BaTiO3), barium carbonate (BaCO3), yttria, and manganese oxide (MnO2).

### Claim 6 (depends on 1)

The battery of claim 1, wherein an area ratio of the cathode active material layer to the anode active material layer is about 1:1.01 to about 1:1.5.

### Claim 7 (depends on 1)

The battery of claim 1, further comprising:
a plurality of cathodes including the cathode; and
a plurality of anodes including the anode, and
wherein the plurality of cathodes and the plurality of anodes are alternately stacked.

### Claim 8 (depends on 1)

The battery of claim 1, further comprising:
a cathode tab protruding from the cathode; and
an anode tab protruding from the anode.

### Claim 9 (depends on 1)

The battery of claim 1, further comprising a pouch in which the electrode assembly is accommodated and sealed from an outside.

### Claim 10 (depends on 9)

The battery of claim 9, further comprising an adhesive member provided on an outer surface of the electrode assembly,
wherein the adhesive member couples the pouch to the electrode assembly.

### Claim 11 (depends on 10)

The battery of claim 10, wherein the adhesive member comprises at least one of acrylic resin, fluorine-based resin, rubber-based resin, and natural polymer resin.

### Claim 12 (depends on 1)

The battery of claim 1, wherein the electrode assembly is wound in a roll shape.

### Claim 13 (depends on 12)

The battery of claim 12, wherein the cathode collector has a flat sheet shape, and
wherein the second region corresponds to two edges parallel with each other in an edge portion of the cathode collector.

### Claim 14 (depends on 1)

The battery of claim 1, wherein the electrode assembly is formed by stacking the cathode, the anode and the separator,
wherein the cathode collector has a flat sheet shape, and
wherein the second region corresponds to an edge portion of the cathode collector.

### Claim 15

A battery comprising:
an electrode assembly comprising:
a cathode comprising:
a cathode collector,
a cathode active material layer provided in a first region of a surface of the cathode collector, and
an insulating layer provided in a second region of the surface of the cathode collector and adjacent to the cathode active material layer;
an anode comprising an anode collector and an anode active material layer provided in a region of a surface of the anode collector; and
a separator provided between the cathode and the anode, and
an adhesive layer provided between the insulating layer and the separator,
wherein a first portion of the separator is adhered to a first surface of the adhesive layer,
wherein a second portion of the separator is spaced apart from the cathode active material layer in a first direction, and
wherein the first surface of the adhesive layer is at a level that is the same as a level of a surface of the cathode active material layer in a second direction intersecting the first direction.

### Claim 16 (depends on 15)

The battery of claim 15, wherein the adhesive layer comprises at least one of acrylic resin, fluorine-based resin, rubber-based resin, and natural polymer resin.

### Claim 17 (depends on 15)

The battery of claim 15, wherein a thickness ratio of the insulating layer to the adhesive layer is about 1:1 to about 2:1.

### Claim 18

An electronic device comprising:
a housing comprising a front plate, a rear plate, and a bracket enclosing a gap between the front plate and the rear plate;
a display configured to display information through at least a region of the front plate of the housing; and
a battery mounted in a mounting groove of the bracket,
wherein the battery comprises an electrode assembly, and
wherein the electrode assembly comprises:
a cathode comprising:
a cathode collector,
a cathode active material layer provided in a first region of a surface of the cathode collector, and
an insulating layer provided in a second region of the surface of the cathode collector and adjacent to the cathode active material layer,
an anode comprising an anode collector and an anode active material layer provided in a region of a surface of the anode collector, and
a separator provided between the cathode and the anode, and
wherein a first portion of the separator is adhered to a first surface of the insulating layer,
wherein a second portion of the separator is spaced apart from the cathode active material layer in a first direction, and
wherein the first surface of the insulating layer is at a level that is the same as a level of a surface of the cathode active material layer in a second direction intersecting the first direction.

### Claim 19 (depends on 18)

The electronic device of claim 18, wherein the battery is provided in the bracket.

### Claim 20 (depends on 18)

The electronic device of claim 18, wherein the battery further comprises a pouch in which the electrode assembly is accommodated and sealed from the outside, and
wherein the bracket is configured to face the pouch and comprises a recess into which the pouch fits.