Secondary battery having a gasket with coupling extensions

A secondary battery comprising:

• a bare cell including:
• an electrode assembly having cathode plates, anode plates and separators insulating the cathode plates from the anode plates;
• a can housing the electrode assembly, the can having an opening for receiving the electrode assembly;
• and
• a cap assembly having:
• a cap plate sealing an opening of the can, the cap plate having a terminal through-hole;
• an electrode terminal inserted into the terminal through-hole;
• and
• a gasket insulating the electrode terminal from the terminal through-hole, wherein the gasket has a side wall extending in a first direction generally away from the electrode assembly and contacting the electrode terminal and a coupling extension extending from the side wall of the gasket in a second direction different from the first direction, the coupling extension being spaced in its entirety from the cap plate and configured to allow a portion of the molding resin to be located between the coupling extension and the cap plate;
• a protective circuit board coupled to the bare cell;
• and
• a molding resin molding the protective circuit board with the bare cell, the molding resin filling the space between the coupling extension and the cap plate to increase the coupling force between the cap plate and the molding resin.