Secondary battery

A secondary battery comprising:

• an electrode assembly;
• a case accommodating the electrode assembly;
• a cap assembly including a cap plate disposed over an upper opening of the case;
• and
• an electrode terminal electrically connected with the electrode assembly and protruding outwardly from a terminal hole of the cap plate, the electrode terminal including:
• a collecting terminal extending through the terminal hole of the cap plate,
• a terminal plate coupled with the collecting terminal, and
• a coupling terminal coupled with the terminal plate;
• wherein the cap plate includes a short-circuit hole therein, the short-circuit hole being at a position corresponding to a position of the coupling terminal,
• a short-circuit member covers the short-circuit hole, and
• the short-circuit member is deformable and is configured to contact a bottom side of the coupling terminal in a deformed condition.