Secondary battery and secondary battery module including the same

A secondary battery module comprising:

• a plurality of secondary batteries, each of the plurality of secondary batteries comprising an electrode assembly, a battery case accommodating the electrode assembly, and a cap assembly;
• and
• a plurality of bus bars electrically coupled to the plurality of secondary batteries,
• wherein the cap assembly comprises a cap plate coupled to the battery case and sealing the battery case, and first and second terminals spaced from each other on the cap plate,
• wherein the first and second terminals each comprise:
• first and second terminal plates, each of the first and second terminal plates comprising a base on the cap plate and a protrusion protruding from the base and away from the electrode assembly;
• and
• first and second terminal connection members respectively on the base of the first and second terminal plates, each of the first and second terminal connection members comprising a groove coupled with the corresponding protrusion, wherein the first and second terminal connection members electrically couple the first and second terminal plates and the bus bars, respectively.