Patent ID: 8450002

Claim:
An electrode assembly comprising: a first electrode coated with a first active material; a second electrode coated with a second active material; and a separator located between the first and second electrodes, the separator being for insulating the first electrode from the second electrode, wherein: the first and second electrodes and the separator are wound into a jelly-roll; at least one of the first and second electrodes comprises a roll-starting end non-coated portion or a roll-finishing end non-coated portion where a respective one of the first and second active materials is not coated on the roll-starting end or the roll-finishing end of the at least one of the first and second electrodes; the roll-starting end non-coated portion or the roll-finishing end non-coated portion is located at a region of a first side surface or a second side surface of the at least one of the first and second electrodes; the region having the roll-starting end non-coated portion or the roll-finishing end non-coated portion does not face the first or second electrode having a different polarity from the at least one of the first and second electrodes with the separator interposed therebetween; and at least one of the first and second electrodes comprises at least one of an upper non-coated portion or a lower non-coated portion, where a respective one of the first and second active materials is not coated on an upper portion or a lower portion of the first or second electrode at a region other than the roll-starting end or the roll-finishing end.