Battery, Battery Pack and Vehicle Including the Same, and Method for Manufacturing 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;
• a battery housing configured to accommodate the electrode assembly through an open portion formed at one side;
• a battery terminal having a portion located outside an closed portion provided at a side opposite to the open portion and another portion located inside the battery housing, the battery terminal being electrically coupled to the electrode assembly, the battery terminal having a protrusion protruding toward the battery housing;
• and
• a terminal sealing member interposed between the battery terminal and the battery housing and having a sealing reinforcement area compressed by the protrusion.