# US 12,597,629 B2 · Method of manufacturing secondary battery

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- Number: US 12,597,629 B2
- Document ID: US12597629B2
- Status: Granted
- Kind: B2
- Application number: 18/022,909
- Filed: 2022-01-19
- Published: 2023-10-05
- Granted: 2026-04-07
- Earliest claimed: 2021-01-20
- Assignees: LG Energy Solution, Ltd.
- Applicants: LG Energy Solution, Ltd.
- Inventors: Jeonghui Han
- Web page: https://patentgrep.com/patent/US12597629B2

## CPC

- H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)}
- H01M 10/0422: {Cells or battery with cylindrical casing}
- H01M 10/049: {Processes for forming or storing electrodes in the battery container}
- H01M 10/052: Li-accumulators
- H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
- H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence)
- H01M 50/166: characterised by the methods of assembling casings with lids
- 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

A method of manufacturing a secondary battery includes manufacturing an electrode assembly by winding a first electrode, a second electrode, and a separator together; attaching a tape to cover an outermost edge portion of the electrode assembly; accommodating the electrode assembly in a battery casing having an open end; and removing the tape attached to the electrode assembly from the electrode assembly. The tape includes a first portion attached to the electrode assembly, and a second portion extending from the first portion in a first direction towards the open end of the battery casing. In the removing the tape, the tape is removed by pulling the second portion.

## Claims

### Claim 1

A method of manufacturing a secondary battery, the method comprising:
manufacturing an electrode assembly by winding a first electrode, a second electrode, and a separator together;
attaching a tape to cover an outermost edge portion of the electrode assembly;
accommodating the electrode assembly in a battery casing having an open end; and
removing the tape attached to the electrode assembly from the electrode assembly,
wherein the tape comprises a first portion attached to the electrode assembly, and a second portion extending from the first portion in a first direction towards the open end of the battery casing, the second portion of the tape extending in the first direction from the electrode assembly and being exposed, and
wherein, in the removing the tape, the tape is removed by pulling the second portion.

### Claim 2 (depends on 1)

The method of claim 1, wherein:
the tape extends in an axial direction of the electrode assembly to cover the outermost edge portion of the electrode assembly.

### Claim 3 (depends on 1)

The method of claim 1, wherein:
the first electrode comprises a first electrode current collector, and a first active material layer formed by applying an electrode active material onto the first electrode current collector, and
the first electrode current collector comprises an exposed portion exposed to an outer peripheral surface of the electrode assembly of which the exposed portion includes the outermost edge portion.

### Claim 4 (depends on 3)

The method of claim 3, wherein:
as the tape is removed in the removing the tape, the electrode assembly is unwound in the battery casing, and the exposed portion contacts an inner wall of the battery casing.

### Claim 5 (depends on 1)

The method of claim 1, wherein:
the second portion is a portion having no adhesiveness.

### Claim 6 (depends on 1)

The method of claim 1, wherein:
the second portion is folded so that portions of the second portion having adhesiveness face each other.

### Claim 7 (depends on 1)

The method of claim 1, wherein:
the tape comprises a bending portion that is a portion curved between the first portion and the second portion.

### Claim 8 (depends on 7)

The method of claim 7, wherein:
the bending portion is formed at lower sides of the first portion and the second portion.

### Claim 9 (depends on 8)

The method of claim 8, wherein:
in the removing the tape, the tape is removed by pulling the second portion in an axial direction of the electrode assembly.

### Claim 10 (depends on 7)

The method of claim 7, wherein:
a portion of the first portion, which has adhesiveness, is positioned to face toward the electrode assembly, and
a portion of the second portion, which has adhesiveness, is positioned to face away from the electrode assembly.

### Claim 11 (depends on 1)

The method of claim 1, wherein:
the battery casing is a cylindrical casing.