초록 ▼

A secondary battery includes a can having an interior space, an electrode assembly provided in the interior space of the can, and a cap assembly seated on an opening formed in the can to seal the can and electrically connected to the electrode assembly. The cap assembly includes a cap plate connecte

A secondary battery includes a can having an interior space, an electrode assembly provided in the interior space of the can, and a cap assembly seated on an opening formed in the can to seal the can and electrically connected to the electrode assembly. The cap assembly includes a cap plate connected to the opening to seal the can; a tab plate mounted to one side of the cap plate and connected to the electrode assembly; an insulating plate interposed between the cap plate and the tab plate; an electrode pin passing through the cap plate, the tab plate, and the insulating plate to interconnect these elements; and an insulating gasket interposed between the cap plate and the electrode pin. Also, the electrode pin includes a head portion mounted to one side of the cap plate and formed in multiple stages in an area contacting the insulating gasket; and a column extending from the head portion and passing through the insulating gasket, the cap plate, the insulating plate, and the cap plate.

대표청구항 ▼

What is claimed is: 1. A secondary battery, comprising:a can;an electrode assembly provided inside said can; anda cap assembly comprising:a cap plate configured to seal an opening of said can encasing the electrode assembly;a tab plate mounted to one side of said cap plate to electrically connect sa

What is claimed is: 1. A secondary battery, comprising:a can;an electrode assembly provided inside said can; anda cap assembly comprising:a cap plate configured to seal an opening of said can encasing the electrode assembly;a tab plate mounted to one side of said cap plate to electrically connect said electrode assembly;an insulating plate interposed between said cap plate and said tab plate;an insulating gasket lying upon said cap plate; andan electrode pin passing through said cap plate, said tab plate, and said insulating plate to interconnect said cap plate, said tab plate, and said insulating plate, said electrode pin comprising:a shaft extending along an axis from engagement with said tab plate and through said insulating plate, said cap plate and said insulating gasket,a head terminating the shaft and extending by a first radial distance radially from said axis to provide a periphery engaging the insulating gasket on an exterior side of the cap plate, anda shoulder interposed between said shaft and said head extending by a second and lesser radial distance radially from said axis to provide a peripheral surface engaging the insulating gasket, with axial thickness of said peripheral surface increasing toward said insulating gasket as a function of said radial distance from said axis.