# US 12,224,453 B2 · Electrode assembly and method of manufacturing the same

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- Number: US 12,224,453 B2
- Document ID: US12224453B2
- Status: Granted
- Kind: B2
- Application number: 18/357,696
- Filed: 2023-07-24
- Published: 2023-11-16
- Granted: 2025-02-11
- Earliest claimed: 2018-11-19
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Kyoungheon Heo; Kwanseop Song; Jinho So
- Web page: https://patentgrep.com/patent/US12224453B2

## CPC

- H01M 4/04: Processes of manufacture in general
- H01M 50/461: {with adhesive layers between electrodes and separators}
- H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes}
- H01M 10/052: Li-accumulators
- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 50/417: Polyolefins
- H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes
- 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
- 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

An electrode assembly includes: a plurality of positive electrodes and a plurality of negative electrodes, alternately and repeatedly stacked; a plurality of separators between the positive electrodes and the negative electrodes, respectively, to protrude from the positive electrodes and the negative electrodes and stacked such that first surfaces at edges thereof face each other; and a fixing member including an adhesive layer adhered to the first surfaces of the separators that are facing each other.

## Claims

### Claim 1

An electrode assembly comprising:
a plurality of positive electrodes and a plurality of negative electrodes, alternately and repeatedly stacked;
a separator between the positive electrodes and the negative electrodes, respectively, to protrude from the positive electrodes and the negative electrodes and stacked such that surfaces at edges of the separator face each other;
a fixing member comprising an adhesive layer adhered to the surfaces of the separator at an end where an uncoated region of the positive electrodes and an uncoated region of the negative electrodes is formed, the adhesive layer being arranged at opposite sides of the electrode assembly; and
an insulating member adhered to an upper surface of the separator and a lower surface of the separator,
wherein the insulating member is disposed on the separator in a direction crossing the electrode assembly.

### Claim 2 (depends on 1)

The electrode assembly of claim 1, wherein the insulating member comprises at least two insulating members.

### Claim 3 (depends on 2)

The electrode assembly of claim 2, wherein the insulating members overlap each other in the direction crossing the electrode assembly.

### Claim 4 (depends on 1)

The electrode assembly of claim 1, wherein the adhesive layer is spaced apart from ends of the positive electrodes and the negative electrodes.

### Claim 5 (depends on 1)

The electrode assembly of claim 1, wherein the adhesive layer surrounds ends of the separator.

### Claim 6 (depends on 1)

The electrode assembly of claim 1, wherein the fixing member is disposed on a surface of the electrode assembly with the adhesive layer.

### Claim 7 (depends on 1)

The electrode assembly of claim 1, wherein the adhesive layer is arranged at a regular interval along the edges of the separator.

### Claim 8 (depends on 1)

The electrode assembly of claim 1, wherein the adhesive layer is continuously linear in a direction in which the separator overlaps.

### Claim 9 (depends on 8)

The electrode assembly of claim 8, wherein the adhesive layer is inclined with respect to the direction in which the separator overlaps.

### Claim 10 (depends on 1)

The electrode assembly of claim 1, wherein
the separator comprises a polyolefin series, and
the fixing member comprises a polyolefin grafted with maleic anhydride.