Patent ID: 8815434
Filing Date: 2014-08-26
Classification: H01M,Y02E,Y02P

Abstract:
1. An electrode assembly for a secondary battery, comprising: electrode members disposed in a stack and divided into groups; and a first separator including folded portions disposed between the electrode members of corresponding ones of the groups, and wound portions extending from the folded portions and wrapped around the groups, wherein the wound portions comprise first, second and third wound portions, wherein the first wound portion is surrounded by the second wound portion, wherein the second wound portion is enclosed by the third wound portion, and wherein the second wound portion comprises a surrounding portion that surrounds the first wound portion and a folded portion that does not surround the first wound portion, wherein the folded portion of the second wound portion extends from the first wound portion and is connected to the surrounding portion, and wherein the surrounding portion surrounds the first wound portion and the folded portion of the second wound portion.