CAP ASSEMBLY AND SECONDARY BATTERY INCLUDING SAME

A cap assembly may include a cap plate having a through hole formed therein, a rivet terminal that may be inserted into the through hole and placed through the cap plate, a terminal plate that may be joined to one end of the rivet terminal on an upper surface of the cap plate, and a gasket that may be inserted into the through hole and insulates the cap plate and the rivet terminal, the rivet terminal may have a maximum radial width less than the through hole.