Disclosed are an electrode assembly, a battery, and a battery pack and vehicle including same. In the electrode assembly, an uncoated portion of an electrode includes a segment fragment section divided into a plurality of segment fragments, and the segment fragment section includes a plurality of segment fragment groups separated by intergroup pitches along the winding direction. One end portion of the electrode assembly includes a plurality of segment fragment alignment units. In winding turns corresponding to the plurality of segment fragment alignment units, the intergroup pitches of the segment fragment groups arranged in the same winding turn are substantially the same, and the pitches between the segment fragment groups are larger in winding turns of regions close to the outer circumferential surface than in winding turns of regions close to a core.