Battery, and battery pack and vehicle comprising the same

A battery, comprising:

• an electrode assembly including a first electrode, a second electrode and a separator interposed between the first electrode and the second electrode wound around a winding axis, defining a core and an outer circumferential surface, wherein the first electrode includes a first active material region coated with an active material layer along a winding direction and a first uncoated region not coated with the active material layer, and at least part of the first uncoated region itself is used as an electrode tab, wherein the second electrode includes a second active material region coated with an active material layer along a winding direction and a second uncoated region not coated with the active material layer, and at least part of the second uncoated region itself is used as an electrode tab;
• a battery housing having an open portion at one side and a closed portion at the other side, the battery housing being configured to accommodate the electrode assembly through the open portion;
• a first current collector accommodated in the battery housing and coupled to at least part of the first uncoated region at the closed portion side;
• a terminal exposed to the outside through the closed portion, electrically connected to the first current collector and electrically insulated from the battery housing;
• an insulation gasket interposed between the battery housing and the terminal to block the electrical connection between the battery housing and the terminal;
• an insulator interposed between the closed portion and the first current collector to block electrical connection between the first uncoated region and the battery housing, the insulator having a central hole larger than the maximum width, on the inner side of the battery housing, of a combination of the terminal and the insulation gasket so as to allow the terminal to pass through and be coupled to the first current collector;
• and
• a second current collector accommodated in the battery housing and coupled, at the open portion side, to at least part of the second uncoated region and electrically connected to the battery housing.