Battery, and battery pack and vehicle including the same

A battery comprising:

• an electrode assembly comprising a first electrode, a second electrode, and a separator located between the first electrode and the second electrode, the first electrode, the second electrode, and the separator being wound in a winding direction to define a core and an outer circumference of the electrode assembly, wherein the first electrode and the second electrode include a first uncoated portion and a second uncoated portion on which an active material layer is not coated along the winding direction, respectively;
• a battery housing accommodating the electrode assembly therein, the battery housing having an opening at a first side of the battery housing and a closed portion at a second side opposite to the first side;
• a cap comprising a venting portion having a thinner thickness compared to a peripheral region of the cap, the cap covering the opening, and the cap being electrically connected to the battery housing and the first uncoated portion;
• and
• a battery terminal configured to penetrate the closed portion and electrically connected to the second uncoated portion,
• wherein the battery housing is electrically connected to the first uncoated portion through the cap.