Battery, and Battery Pack and Vehicle Including the Same

A battery may include an electrode assembly including a first electrode having a first uncoated portion, a second electrode having a second uncoated portion and configured to have a polarity opposite to the first electrode, and a separator interposed between the first electrode and the second electrode; a battery housing configured to accommodate the electrode assembly through an open portion formed at one side and electrically connected to the second electrode; and a current collection terminal configured to be electrically connected to the first electrode and electrically insulated from the battery housing, the current collection terminal including an electric connection portion configured to be coupled onto one surface of the electrode assembly at a closed portion of the battery housing provided at a side opposite to the open portion and a terminal portion configured to extend from the electric connection portion so that at least a part thereof is exposed to an outside of the battery housing through the closed portion.