Rechargeable battery

A rechargeable battery comprising:

• a case accommodating an electrode assembly;
• a cap plate closing and sealing an opening of the case;
• an electrode terminal comprising a rivet terminal and a plate terminal, the rivet terminal being coupled to the electrode assembly and extending through a terminal opening in the cap plate, and the plate terminal being at an upper surface of the cap plate and coupled to the rivet terminal, the upper surface of the cap plate facing away from the case;
• and
• a first insulator and a second insulator electrically insulating the electrode terminal from the cap plate, the first insulator and the second insulator being separate from and interlocked with each other, the first insulator being between the cap plate and the plate terminal at an outer periphery of the rivet terminal, and the second insulator being coupled to the first insulator at an outer periphery thereof and being between the cap plate and the plate terminal.