Lg Chem, Ltd

In-Gu An

Dong-Myung Kim

Hyung-Ku Yun

Byung-O Park

Jae-Bin Chung

Soon-Ho Ahn

Hyun Woo Park

Hyun-Chul Jung

Joo-Young Chung

Do-Hwa Jung

Se-Young Ahn

Yoo-Jin An

Eun-Seok Choi

There are provided a method of manufacturing a jelly roll-type electrode assembly and a method of manufacturing a secondary battery using the electrode assembly. The method of manufacturing the electrode assembly includes notching a cathode and an anode, elongated in one direction, in a constant size and shape to form a plurality of electrode units, laminating the cathode and the anode with a separator disposed therebetween to form a unit cell, and winding the unit cell by bending the connection units so that the electrode units of the cathode and the anode overlap each other. In the manufacturing of the jelly roll-type electrode assembly and the polymer secondary battery, whose production process can be easily simplified, a jelly roll-type electrode assembly and a polymer secondary battery, both of which exhibit excellent design flexibility, can be manufactured.

Method of manufacturing jelly roll-type electrode assembly and method of manufacturing jelly roll-type polymer secondary battery

Battery for portable terminal

There is provided a jelly-roll type electrode assembly. In the jelly-roll type electrode assembly including a cathode including a cathode active material coating layer and an anode including an anode active material coating layer, with a separation film interposed therebetween, and formed to be rolled, the jelly-roll type electrode assembly is characterized in that the anode and the cathode include uncoated portions, the uncoated portions are overlapped and include mirror images formed on a front surface and a rear surface, and the jelly-roll type electrode assembly is flexible in the uncoated portion. A pouch-type secondary battery, a battery pack and a device including the electrode assembly are provided. A flexible jelly-roll type secondary battery may be reversibly flexible while blocking the separation of an electrode active material from a current collector surface.

Flexible jelly-roll type secondary battery

The present disclosure relates to an electrode assembly formed by stacking a plurality of electrode units, the electrode assembly including: two or more steps formed by stacking three or more types of the electrode units having different areas, wherein an array of electrode units having a maximum area among the electrode units is positioned in the interior of the electrode assembly, and electrodes having different polarities face each other at an interface between the electrode units having different areas.

Electrode assembly, battery and device including the same

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Daejeon, South Korea

In-Gu An