Secondary battery

A secondary battery, comprising:

• an electrode assembly;
• a case for accommodating the electrode assembly, the case including:
• a bottom,
• a lateral plate connected to the bottom and extending perpendicularly from the bottom in an upward direction, and
• a beading part above the lateral plate;
• a cap assembly which is coupled to an upper part of the case so as to seal the case, and has a terminal part;
• a conductive cover which is coupled to the upper part of the case and fixed to the lateral plate of the case, the conductive cover including:
• a flat part covering the upper part of the case,
• an extending part extending downwardly from the flat part, the extending part covering laterally the beading part while being laterally spaced apart from the beading part, and
• a plurality of coupling parts protruding inwardly from the extending part, an entirety of each of the plurality of coupling parts protruding inwardly relative to the extending part and contacting the lateral plate of the case under the beading part, and the plurality of coupling parts being arranged along an inner circumferential surface of the extending part;
• and
• a crimping part securing the cap assembly, the crimping part extending from the beading part and contacting an inner surface of the extending part, such that the crimping part extends laterally toward the extending part beyond the lateral plate to overlap a top of the coupling part.