Patent ID: 9478824
Filing Date: 2016-10-25
CPC Classification: H01M,Y02E,Y02P

Claim Text:
1. A jelly-roll type electrode assembly including a cathode including a cathode active material coating layer formed by coating both surfaces of a cathode current collector with a cathode active material, and an electrode tab; an anode including an anode active material coating layer formed by coating both surfaces of an anode current collector with an anode active material, and an electrode tab; and a separation film interposed between the anode and the cathode, the jelly-roll type electrode assembly being formed to be rolled from a first end of the electrode assembly to the second end of the electrode assembly in a rolling direction, wherein the anode and the cathode include uncoated portions not coated with a cathode active material and an anode active material, the uncoated portions are overlapped with each other on the respective cathodes and anodes and include mirror images formed on a front surface and a rear surface thereof based on a jelly-roll formed central surface, and the jelly-roll type electrode assembly is flexible in the uncoated portion, wherein each of the cathode and the anode includes at least one of the uncoated portions formed to be parallel to the rolling direction and at least one of the uncoated portions formed to be perpendicular to the rolling direction thereof, wherein the uncoated portions are formed so that the cathode active material coating layer and the anode active material coating layer are disconnected from each other in portions of the cathode current collector and the anode current collector in directions both parallel and perpendicular to the rolling direction, and wherein the electrode tab is formed in regions in which the cathode active material coating layer and the anode active material coating layer are formed.