Cylindrical battery, and battery pack and vehicle including the same

A cylindrical battery, comprising:

• an electrode assembly in which a first electrode, a second electrode, and a separator interposed therebetween are wound around a winding axis to define a core and an outer circumference,
• wherein the first electrode and the second electrode respectively include a first uncoated portion and a second uncoated portion not coated with an active material layer along a winding direction,
• wherein at least one of the first uncoated portion and the second uncoated portion is defined as an electrode tab by itself and includes a core-side uncoated portion adjacent to the core of the electrode assembly, an outer circumference uncoated portion adjacent to the outer circumference of the electrode assembly, and an intermediate uncoated portion interposed between the core-side uncoated portion and the outer circumference uncoated portion, and
• wherein at least one of the core-side uncoated portion and the outer circumference uncoated portion has a smaller height than the intermediate uncoated portion in a winding axis direction;
• a battery housing configured to accommodate the electrode assembly through an opening formed in a bottom thereof,
• a first current collecting plate coupled to the first uncoated portion and positioned within the battery housing;
• a cap plate configured to cover the opening;
• a spacer disposed between the cap plate and the electrode assembly to fix the electrode assembly and seal the battery housing;
• and
• an external terminal electrically connected to the second uncoated portion.