Cylindrical battery, and battery pack and vehicle including the same

A cylindrical battery, comprising:

• an electrode assembly including a first electrode having a first uncoated portion and a second electrode having a second uncoated portion;
• a battery housing configured to accommodate the electrode assembly through an open portion formed in one side and electrically connected to the second uncoated portion;
• a cap plate configured to seal the open portion of the battery housing;
• a current collecting plate having a rim portion, an uncoated portion coupling portion extending inwardly from the rim portion and coupled to the first uncoated portion, and a terminal coupling portion spaced apart from the uncoated portion coupling portion;
• an electrode terminal riveted through a perforated hole formed in a closed portion provided opposite to the open portion of the battery housing and coupled to the terminal coupling portion;
• and
• an insulating gasket interposed between the electrode terminal and the perforated hole,
• wherein the electrode terminal includes:
• a body portion inserted into the perforated hole;
• an outer flange portion configured to extend along an outer surface of the closed portion from a circumference of one side of the body portion exposed through the outer surface of the closed portion of the battery housing;
• an inner flange portion configured to extend toward an inner surface of the closed portion from a circumference of the other side of the body portion exposed through the inner surface of the closed portion;
• and
• a flat portion provided on an inner side of the inner flange portion and coupled to the terminal coupling portion.