Abstract: A secondary battery includes an electrode assembly, a can, a cap plate, an insulating plate, and a terminal plate. The electrode assembly is in the can. The cap plate seals an opening of the can and includes a first hole. The insulating plate is on a lower surface of the cap plate and includes a second terminal through hole. The terminal plate is on a lower surface of the insulating plate and includes a third terminal through hole and at least one protrusion adjacent the third terminal through hole.

Abstract: A secondary battery includes an electrode assembly, a can housing the electrode assembly, the can having a long axis and a short axis, and a cap plate that seals an opening of the can. The can includes a first side surface and a second side surface that face each other so as to correspond to the short axis of the can, the first side surface and the second side surface having a first thickness, a third side surface and a fourth side surface that face each other so as to correspond to the long axis of the can, the third side surface and the fourth side surface having a second thickness, the second thickness being greater than the first thickness, and a bottom surface that is located opposite the opening of the can and contacts the first through fourth side surfaces, the bottom surface having a third thickness.

Abstract: According to aspects of embodiments of the present invention, a secondary battery includes: an electrode assembly including: a first electrode plate; a second electrode plate; and a separator between the first electrode plate and the second electrode plate; a can comprising an opening formed on an end of the can to accommodate the electrode assembly; and a cap plate configured to seal the opening of the can, the cap plate including: a first surface; a second surface parallel to the first surface; a third surface coupling the first and second surfaces and having a constant height; and a chamfer at a portion of the first surface which contacts the third surface, wherein the chamfer has a varying tilt.

Abstract: A secondary battery includes an electrode assembly, a can, a cap plate, an insulating plate, and a terminal plate. The electrode assembly is in the can. The cap plate seals an opening of the can and includes a first hole. The insulating plate is on a lower surface of the cap plate and includes a second terminal through hole. The terminal plate is on a lower surface of the insulating plate and includes a third terminal through hole and at least one protrusion adjacent the third terminal through hole.

Abstract: According to aspects of embodiments of the present invention, a secondary battery includes: an electrode assembly including: a first electrode plate; a second electrode plate; and a separator between the first electrode plate and the second electrode plate; a can comprising an opening formed on an end of the can to accommodate the electrode assembly; and a cap plate configured to seal the opening of the can, the cap plate including: a first surface; a second surface parallel to the first surface; a third surface coupling the first and second surfaces and having a constant height; and a chamfer at a portion of the first surface which contacts the third surface, wherein the chamfer has a varying tilt.

Abstract: A secondary battery includes an electrode assembly, a can housing the electrode assembly, the can having a long axis and a short axis, and a cap plate that seals an opening of the can. The can includes a first side surface and a second side surface that face each other so as to correspond to the short axis of the can, the first side surface and the second side surface having a first thickness, a third side surface and a fourth side surface that face each other so as to correspond to the long axis of the can, the third side surface and the fourth side surface having a second thickness, the second thickness being greater than the first thickness, and a bottom surface that is located opposite the opening of the can and contacts the first through fourth side surfaces, the bottom surface having a third thickness.

Abstract: Disclosed is a secondary battery that comprises an electrode assembly, a can accommodating the electrode assembly, and a cap assembly coupled to an upper portion of the can and including an upper cap that transfers a current of the electrode assembly to an exterior of the can. The upper cap includes a terminal part including a first flat portion disposed at a center of the upper cap and a second flat portion extending from a periphery of the first flat portion, a peripheral part disposed at a periphery of the terminal part and stepped from the terminal part, and a connection part connecting the terminal part to the peripheral part.

Abstract: Disclosed are a current interrupting device and a secondary battery including the same. According to an embodiment, a current interrupting device comprises a first terminal; a second terminal; a fuse coupled to the first and second terminals; and a fuse body surrounding an exterior of the fuse to seal the fuse, wherein the first and second terminals include thin portions connected to the fuse, and the thin portions have a thickness less than a thickness of other portions of the first and second terminals.

Abstract: Disclosed is a secondary battery that comprises an electrode assembly, a can accommodating the electrode assembly, and a cap assembly coupled to an upper portion of the can and including an upper cap that transfers a current of the electrode assembly to an exterior of the can. The upper cap includes a terminal part including a first flat portion disposed at a center of the upper cap and a second flat portion extending from a periphery of the first flat portion, a peripheral part disposed at a periphery of the terminal part and stepped from the terminal part, and a connection part connecting the terminal part to the peripheral part.

Abstract: Disclosed are a current interrupting device and a secondary battery including the same. According to an embodiment, a current interrupting device comprises a first terminal; a second terminal; a fuse coupled to the first and second terminals; and a fuse body surrounding an exterior of the fuse to seal the fuse, wherein the first and second terminals include thin portions connected to the fuse, and the thin portions have a thickness less than a thickness of other portions of the first and second terminals.