Rechargeable battery

A rechargeable battery, comprising:

• an electrode assembly including a positive electrode and a negative electrode formed on both surfaces of a separator;
• a case accommodating the electrode assembly;
• a cap plate closing an opening of one side of the case;
• and
• an electrode terminal installed to the cap plate, wherein the electrode terminal includes:
• a first terminal part installed to a terminal hole of the cap plate, connected to the electrode assembly inside the case, and protruding outside the cap plate thereby forming a first connection portion,
• a second terminal part forming a second connection portion coupled to the first connection portion in a first direction determined along a length of the electrode terminal and protruding from the first terminal part, and
• a fastener coupling the first connection portion and the second connection portion in a second direction intersecting the first direction,
• wherein:
• the first connection portion includes:
• a supporting depression opened at an outer surface of the first terminal part, and
• a coupling groove extended in a third direction intersecting the second direction at the supporting depression, and
• the second connection portion includes:
• a supporting portion inserted into the supporting depression, and
• a coupling protrusion extended in the third direction at the supporting portion and inserted into the coupling groove.