# US 2014/0154543 A1 · Secondary battery of excellent productivity and safety

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0154543 A1
- Document ID: US20140154543A1
- Status: Published application
- Kind: A1
- Application number: 14/172,527
- Filed: 2014-02-04
- Published: 2014-06-05
- Earliest claimed: 2011-09-27
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Do Gyun KIM; Dong-Myung KIM; Dong Sub LEE; Sang Bong NAM; Sang Sok JUNG
- Web page: https://patentgrep.com/patent/US20140154543A1

## CPC

- H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)}
- H01M 10/052: Li-accumulators
- H01M 50/44: Fibrous material
- H01M 10/045: {Cells or batteries with folded plate-like electrodes}
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- Y02T 10/70: Energy storage systems for electromobility, e.g. 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
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Disclosed is a secondary battery having a structure in which a jelly-roll having a cathode/separator/anode structure is mounted in a cylindrical battery case, wherein a plate-shaped insulator mounted on the top of the jelly-roll includes a woven fabric or a knit fabric made of fibers.

## Claims

### Claim 1

A secondary battery having a structure in which a jelly-roll having a cathode/separator/anode structure is mounted in a cylindrical battery case,
wherein a plate-shaped insulator mounted on the top of the jelly-roll comprises a woven fabric or a knit fabric made of fibers.

### Claim 2 (depends on 1)

The secondary battery according to claim 1, wherein the fibers comprise synthetic fibers and/or natural fibers.

### Claim 3 (depends on 1)

The secondary battery according to claim 1, wherein fine pores formed in the woven fabric or knit fabric permeate an electrolyte, but do not permeate foreign matter having a size of 100 μm or higher.

### Claim 4 (depends on 2)

The secondary battery according to claim 2, wherein the fine pores have a size of 1 μm to 100 μm.

### Claim 5 (depends on 2)

The secondary battery according to claim 2, wherein the fine pores have a shape of a through hole having a uniform diameter in a longitudinal direction.

### Claim 6 (depends on 2)

The secondary battery according to claim 2, wherein the fine pores have a shape of a communication hole having a non-uniform diameter in a longitudinal direction.

### Claim 7 (depends on 1)

The secondary battery according to claim 1, wherein the insulator has a mono-layer or a multi-layer structure comprising a woven fabric or a knit fabric.

### Claim 8 (depends on 1)

The secondary battery according to claim 1, wherein the insulator has a thickness of 0.1 mm to 0.5 mm.

### Claim 9 (depends on 1)

The secondary battery according to claim 1, wherein the battery is a lithium secondary battery.

### Claim 10 (depends on 1)

The secondary battery according to claim 1, wherein the battery comprises an opening perforated in the insulator, to provide gas discharge and pass-through of electrode terminals.

### Claim 11 (depends on 1)

A device comprising the secondary battery according to claim 1 as a power source.

### Claim 12 (depends on 11)

The device according to claim 11, wherein the device is selected from a cellular phone, a portable computer, a light electronic vehicle (LEV), an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle and a power-storing device.