# US 11,114,686 B2 · Secondary battery including electrode lead exposed within the sealing part and method for manufacturing the same

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- Number: US 11,114,686 B2
- Document ID: US11114686B2
- Status: Granted
- Kind: B2
- Application number: 16/066,792
- Filed: 2017-08-29
- Published: 2019-01-17
- Granted: 2021-09-07
- Earliest claimed: 2016-10-14
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Sang Hun Kim; Yong Su Choi; Hyung Kyun Yu; Soo Ji Hwang; Na Yoon Kim; Yong Kim
- Web page: https://patentgrep.com/patent/US11114686B2

## CPC

- H01M 10/04: Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence)
- H01M 50/10: Primary casings; Jackets or wrappings
- H01M 50/105: Pouches or flexible bags
- H01M 50/172: Arrangements of electric connectors penetrating the casing
- H01M 50/178: for pouch or flexible bag cells
- H01M 50/183: Sealing members
- H01M 50/186: characterised by the disposition of the sealing members
- H01M 50/531: Electrode connections inside a battery casing
- H01M 50/55: on the same side of the cell
- H01M 50/534: characterised by the material of the leads or tabs
- H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding
- 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

Disclosed are a secondary battery and a method for manufacturing the same. According to the present invention, since an external protrusion protruding from the outside of an exterior constituting a body of the secondary battery as a component through which a secondary battery according to a related art is electrically connected to external electric equipment is removed, the secondary battery may be reduced in volume under the same capacity.

## Claims

### Claim 1

A secondary battery comprising:
an electrode assembly comprising an electrode and a separator;
an exterior accommodating the electrode assembly, the exterior including an exterior body and a sealing part sealing an inner space defined by the exterior body; and
one or more electrode leads connected to the electrode assembly,
wherein each of the electrode leads comprises:
an insulation part that is an area surrounded by the exterior;
an exposure part disposed inside the sealing part and inside the insulation part and having an area that is exposed to an outside of the exterior, the area of the exposure part being configured to electrically connect with a component exterior to the secondary battery; and
a connection part connecting the electrode assembly with the exposure part and disposed inside the insulation part, the connection part extending in a first direction from the electrode assembly into the sealing part, the exposure part extending in a second direction from the connection part to the area that is exposed to the outside of the exterior, the second direction being perpendicular to the first direction;
wherein at least a portion of the exposure part is disposed inside the insulation part,
wherein the electrode lead does not protrude to the outside of the exterior, and
wherein the insulation part surrounds an entirety of the exposure part and the connection part.

### Claim 2 (depends on 1)

The secondary battery of claim 1, wherein the connection part is disposed in an inner space defined by the exterior.

### Claim 3 (depends on 1)

The secondary battery of claim 1, wherein the exposure part is disposed within the outermost edge of the exterior.

### Claim 4 (depends on 1)

The secondary battery of claim 1, wherein an insulation member is disposed between the electrode lead and the exterior, and each of the exterior and the insulation member has through-holes in positions corresponding to a position of the exposure part, respectively.

### Claim 5 (depends on 1)

The secondary battery of claim 1, wherein the sealing part is folded by using a folding part, which is a boundary between the exterior body and the sealing part, as a folding axis about which an entirety of the sealing part is rotated relative to the exterior body, such that a plane of the exposure part is oriented transverse to a plane of the electrode assembly.