Patent ID: 7871722

Claim:
An electrode assembly, comprising a separation film including openings formed therethrough; and a plurality of unit cells folded with the separation film, each unit cell including electrode taps disposed at an upper end thereof, wherein the plurality of unit cells are folded with the separation film by disposing the each unit cell on the separation film such that electrode taps of a unit cell face electrode taps of another unit cell disposed adjacent to the unit cell and by folding the unit cells with the separation film in the longitudinal direction of the separation film while the unit cells are disposed on the separation film such that the electrode taps of each unit cell are inserted into corresponding openings of the openings, wherein the separation film covers at least a portion of upper and lower ends of the each unit cell, wherein the plurality of unit cells includes bicells of two types or full cells, wherein, when the bicells of two types are used as the plurality of unit cells, the plurality of unit cells are folded by disposing the bicells of two types such that electrode taps of bicells of a same type face each other and lower ends of bicells of different types face each other, and by disposing a first bicell at an end portion of the separation film a part from a bicell disposed next to the first bicell such that a portion of the separation film between the first bicell and the bicell next to the first bicell covers a surface of the first bicell during the folding, and wherein when the full cells are used as the plurality of unit cells, the plurality of unit cells are folded by disposing the full cells such that a polarity of a surface in contact with the separation film of a full cell is different from a polarity of a surface in contact with the separation film of a next full cell disposed next to the full cell, and by disposing a first full cell disposed at an end of the separation film apart from a full cell disposed next to the first bicell such that a portion of the separation film between the first full cell and the full cell next to the first full cell covers a surface of the first full cell during the folding.