Patent ID: 7897279

Claim:
An electrode assembly comprising: a first electrode strip comprising a first electrode collector having a first coated portion that is covered with a first electrode active material, and a first uncoated portion; a first electrode tab attached to the first uncoated portion; a second electrode strip having a second electrode collector having a second coated portion that is covered with a second electrode active material, and a second uncoated portion; a second electrode tab attached to the second uncoated portion; and first and second separators disposed between the electrode strips, wherein, the electrode strips and the separators are stacked together and wound around a mandrel in a first direction, to form a body of the electrode assembly, the first separator is inserted into the mandrel, and a portion of the first separator that is at least half as long as the circumference of the mandrel is drawn out of the mandrel, rolled around the mandrel in the first direction, and inserted into the body, and the first uncoated portion is inserted into the mandrel, and a portion of the first uncoated portion is drawn out of the mandrel, rolled around the mandrel in the first direction, and inserted into the body.