# US 12,002,970 B2 · Pouch-type secondary battery

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- Number: US 12,002,970 B2
- Document ID: US12002970B2
- Status: Granted
- Kind: B2
- Application number: 17/496,607
- Filed: 2021-10-07
- Published: 2022-04-14
- Granted: 2024-06-04
- Earliest claimed: 2020-10-08
- Assignees: SK On Co., Ltd.
- Applicants: SK Innovation Co., Ltd.
- Inventors: Jun Hee Han; Moon Sung Kim; Sang Baek Ryu; Seung Hyun Yook; Hwan Ho Jang
- Web page: https://patentgrep.com/patent/US12002970B2

## CPC

- H01M 50/105: Pouches or flexible bags
- H01M 50/178: for pouch or flexible bag cells
- H01M 50/184: characterised by their shape or structure
- H01M 50/186: characterised by the disposition of the sealing members
- H01M 50/552: characterised by their shape
- Y02E 60/10: Energy storage using batteries
- 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

## Abstract

A pouch-type secondary battery includes: an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and a pouch case including a sealing portion sealed along an edge thereof to accommodate the electrode assembly therein, and a terrace portion formed to extend toward the sealing portion in which an electrode lead is disposed, wherein a notch portion at which a body of a perforator is seated is formed in the sealing portion to form a perforation portion on the terrace portion.

## Claims

### Claim 1

A pouch-type secondary battery, comprising:
an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and
a pouch case including a sealing portion sealed along an edge thereof to accommodate the electrode assembly therein, and a terrace portion formed to extend toward the sealing portion in which an electrode lead is disposed,
wherein a notch portion is formed to be spaced apart from one surface of the sealing portion adjacent to the notch portion in a longitudinal direction of the pouch-type secondary battery in the sealing portion.

### Claim 2 (depends on 1)

The pouch-type secondary battery of claim 1, wherein the notch portion is formed at an edge of the sealing portion on a side from which an electrode lead protrudes.

### Claim 3 (depends on 1)

The pouch-type secondary battery of claim 1, wherein the notch portion is formed in the sealing portion between the positive electrode lead and the negative electrode lead.

### Claim 4 (depends on 1)

The pouch-type secondary battery of claim 1, wherein two or more notch portions are formed.

### Claim 5 (depends on 1)

The pouch-type secondary battery of claim 1, wherein the notch portion has one surface which is opened.

### Claim 6 (depends on 1)

The pouch-type secondary battery of claim 1, wherein the pouch case is a single unit of sheet-type pouch case used for packaging the electrode assembly.