Electrode Assembly, Cylindrical Battery, and Battery Pack and Vehicle Including the Same

An electrode assembly comprising a first electrode, second electrode, and a separator interposed between the first electrode and the second electrode, wherein the first electrode, the second electrode, and the separator are wound around an axis to define a core and an outer circumference, wherein the first electrode has short side and a long side, wherein the first electrode comprises a coated portion and an uncoated portion along an axial direction, wherein the second electrode has a short side and a long side, and wherein the second electrode comprises a coated portion and an uncoated portion along the axial direction,

• wherein an outermost coated portion of the electrode assembly is the coated portion of the first electrode,
• wherein a winding end of the separator extends from a winding end of the coated portion of the first electrode by a first length along a winding direction,
• wherein a fixing member is attached to the winding end of the separator, the fixing member extending in the axial direction, wherein the fixing member is spaced apart from an axial end of the separator by a second length, and
• wherein an axial end of the coated portion of the first electrode is spaced apart from the axial end of the separator by a third length,
• such that a winding end corner of the coated portion of the first electrode is not exposed to an environment outside the electrode assembly when a winding end corner of the separator is folded as much as possible toward the outer circumference, wherein the axial end of the fixing member is a folding bias point of the separator.