Abstract: A secondary battery, includes an electrode assembly including a first electrode plate, a second electrode plate, and a separator wherein the electrode assembly is wound; a can for accommodating the electrode assembly and an electrolyte; a finishing tape including a film layer comprising a nylon material and an adhesive layer for attaching the film layer to the electrode assembly, wherein the finishing tape at least partially surrounds the electrode assembly; and a cap assembly that seals the can.

Abstract: A rechargeable battery according to one embodiment of the present invention includes: an electrode assembly having a separator interposed between a first electrode and a second electrode; a case including an upper case having an open lower portion and a penetration hole in the upper portion thereof, and a lower case having an open upper portion to seal the lower portion of the upper case, and accommodating the electrode assembly therein; and a cap plate coupled to the upper case so as to seal the penetration hole and electrically insulated from the upper case, wherein the upper case and the lower case are coupled such that partial regions overlap, and an upper end of the lower case protrudes inwardly and is latched and fixed to the outside of the upper case.

Abstract: A secondary battery includes: an electrode assembly; a case including an opening and accommodating the electrode assembly; a cap assembly sealing the opening of the case and having a valve hole formed therein; and a valve vertically movably installed in the valve hole and selectively openable and closeable, to allow an internal gas to be discharged.

Abstract: The present invention relates to a secondary battery which is capable of improving safety. As an example, a secondary battery which comprises an electrode assembly; a case which accommodates the electrode assembly; a cap assembly which is coupled to an upper portion of the case, and a gasket which is interposed between the cap assembly and the case, wherein the cap assembly comprises a cap-up, a safety vent which is installed at a lower portion of the cap-up, a cap-down which is installed at a lower portion of the safety vent, an insulator which is interposed between the safety vent and the cap-down, and a sub-plate which is located on a lower surface of the cap-down, and an insulation layer is formed on one surface of the safety vent, is disclosed.

Abstract: Various embodiments of the present invention relate to a secondary battery, wherein a technical problem to be solved is to provide a secondary battery capable of maintaining an electrical insulating state between a case (can) and a cap assembly even after a gasket is melted due to short-circuiting and heat generation. To this end, the present invention provides a secondary battery comprising: a cylindrical can; an electrode assembly received, along with an electrolyte, in the cylindrical can; a cap assembly for sealing the cylindrical can; and a gasket interposed between the cylindrical can and the cap assembly, wherein the gasket further includes an insulating member having a melting temperature higher than a melting temperature of the gasket.

Abstract: A secondary battery includes: a cylindrical case; an electrode assembly accommodated in the cylindrical case and wound in a cylindrical shape; and a current interrupt device electrically connected to the electrode assembly and sealing the cylindrical case. The current interrupt device includes a cap-down electrically connected to the electrode assembly, a safety vent electrically connected to the cap-down, and an insulating gasket between the cap-down and the safety vent and covering outer circumferences of the cap-down and the safety vent.

Abstract: A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode; a case that is connected to the first electrode to accommodate the electrode assembly, and includes an opening exposing the electrode assembly and a first side wall forming the opening; a cap plate that is coupled to the case to cover an outer area of the opening, and includes a through-hole exposing a central area of the opening and a second side wall overlapping the first side wall in a horizontal direction; a terminal plate that is connected to the second electrode to be insulation-bonded to the cap plate and covers the through-hole; and a first bonding layer that is positioned between the first side wall of the case and the second side wall of the cap plate, and bonds the first side wall and the second side wall.

Abstract: The present invention relates to a secondary battery, wherein the length of a second bending portion of a safety plate covering an extension portion of a cap-up can be adjusted to prevent deformation of the safety plate and improve the sealing force of the secondary battery, even when a crimping part having a flat upper structure in which the sealing force can deteriorate due to the low compression rate of an insulating gasket is used. For example, disclosed is a secondary battery comprising: a cylindrical can; an electrode assembly which, together with an electrolyte, is accommodated in the cylindrical can; a cap assembly coupled to an upper portion of the cylindrical can; and an insulating gasket interposed between the cap assembly and the cylindrical can. The cap assembly comprises: a cap-up; and a safety plate which is installed below the cap-up and has a second bending portion that surrounds an extension portion of an edge of the cap-up and covers a portion of the upper surface of the extension portion.

Abstract: The present invention relates to a secondary battery enabling the enhancement of safety by rapidly releasing gas generated therein. One embodiment discloses a secondary battery comprising: an electrode assembly; a case for receiving the electrode assembly; and a cap assembly coupled to the upper portion of the case and provided with a cap-up, a safety vent installed on the lower portion of the cap-up and having a notch formed therein, and a cap-down coupled to the lower portion of the safety vent, wherein the cap-down comprises a welded part welded to the safety vent from the lower portion of the cap-down.

Abstract: The present invention provides a cylindrical secondary battery which can have increased safety and capacity, and enhanced scratch resistance and pressure resistance on an external contact surface. To this end, a cylindrical secondary battery is disclosed, the battery comprising: a cylindrical case; an electrode assembly received in the case; and a cap assembly for sealing the case, wherein the cap assembly comprises a top plate having a notch formed on at least one surface thereof, a middle plate coupled to the top plate and including a first through-hole formed through the center thereof, and a bottom plate electrically connected with the electrode assembly and coupled to the top plate through the first through-hole of the middle plate, and includes a surface-treated region formed by surface-treating a surface of the top plate so as to have a concave-convex structure.

Abstract: The present invention relates to a secondary battery, wherein an electrode tab of an electrode assembly and a pack tab for modularization are electrically connected by a cap-up without any other configuration, so as to reduce resistance and heat generation, which may occur on a current path. For this purpose, a secondary battery is disclosed, the secondary battery including: a cylindrical can having an upper end opening; an electrode assembly received in the cylindrical can and having an electrode tab; and a cap assembly for sealing the upper end opening of the cylindrical can. The cap assembly includes: a circular-plate-shaped safety plate having a bent which is broken when the pressure inside the cylindrical can increases; and a cap-up disposed on the upper portion of the safety plate and surrounding the edge portion of the safety plate, and the electrode tab is in contact with and coupled to the cap-up.

Abstract: A secondary battery in which an insulation sheet is inserted between a cap-up and a case, thereby increasing safety, is provided. The secondary battery includes: an electrode assembly; a case for receiving the electrode assembly; a cap assembly coupled to an upper part of the case; and a gasket interposed between the cap assembly and the case. The cap assembly includes: a cap-up; a safety vent installed at a lower part of the cap-up and extending to an upper part of the cap-up so as to surround a periphery of the cap-up; and an insulation sheet positioned at an upper part of the safety vent extending to the upper part of the cap-up.

Abstract: Various embodiments of the present invention relate to a cylindrical lithium ion secondary battery. A problem to be solved is to provide a cylindrical lithium ion secondary battery which, when internal gas pressure is larger than predetermined first reference pressure (operating pressure) and is smaller than predetermined second reference pressure (breaking pressure) during overcharging, can maintain an internal sealing while a current path is blocked by a cap assembly.

Abstract: The present invention relates to a cylindrical lithium ion secondary battery which, when an upper end of a cylindrical can is clamped, can prevent deformation of a cap assembly so as to improve safety. For an example, a cylindrical lithium ion secondary battery is disclosed, the battery comprising: a cylindrical can; an electrode assembly received in the cylindrical can; and a cap assembly for sealing the cylindrical can, wherein: the cap assembly comprises a top plate having a notch formed thereon, a support plate disposed in close contact with a lower surface of the top plate and including a first through-hole formed through the center thereof, and a bottom plate electrically connected with the electrode assembly and connected to the lower surface of the top plate through the first through-hole; and the support plate has a strength greater than a strength of the top plate.

Abstract: Disclosed are a finishing tape which is capable of reducing flow of an electrode assembly in a casing and a secondary battery including the same. As an example, disclosed is a finishing tape comprising: a first layer formed of a resin and forming a substrate; and a second layer formed on at least one side of the first layer and including a microsphere structure.

Abstract: The present invention relates to a secondary battery which is capable of improving safety. As an example, a secondary battery which comprises an electrode assembly; a case which accommodates the electrode assembly; a cap assembly which is coupled to an upper portion of the case, and a gasket which is interposed between the cap assembly and the case, wherein the cap assembly comprises a cap-up, a safety vent which is installed at a lower portion of the cap-up, a cap-down which is installed at a lower portion of the safety vent, an insulator which is interposed between the safety vent and the cap-down, and a sub-plate which is located on a lower surface of the cap-down, and an insulation layer is formed on one surface of the safety vent, is disclosed.

Abstract: The present invention provides a cylindrical secondary battery which can have increased safety and capacity, and enhanced scratch resistance and pressure resistance on an external contact surface. To this end, a cylindrical secondary battery is disclosed, the battery comprising: a cylindrical case; an electrode assembly received in the case; and a cap assembly for sealing the case, wherein the cap assembly comprises a top plate having a notch formed on at least one surface thereof, a middle plate coupled to the top plate and including a first through-hole formed through the center thereof, and a bottom plate electrically connected with the electrode assembly and coupled to the top plate through the first through-hole of the middle plate, and includes a surface-treated region formed by surface-treating a surface of the top plate so as to have a concave-convex structure.

Abstract: Disclosed is a secondary battery comprising: an electrode assembly including a first electrode, a second electrode, and a separator interposed therebetween; a can in which the electrode assembly and an electrolyte are received; a cap assembly for sealing the can; and a washer disposed between the can and the can assembly and including at least one moisture-blocking film layer and reinforcing film layer.

Abstract: Various embodiments of the present invention relate to a secondary battery, wherein a technical problem to be solved is to provide a secondary battery capable of maintaining an electrical insulating state between a case (can) and a cap assembly even after a gasket is melted due to short-circuiting and heat generation. To this end, the present invention provides a secondary battery comprising: a cylindrical can; an electrode assembly received, along with an electrolyte, in the cylindrical can; a cap assembly for sealing the cylindrical can; and a gasket interposed between the cylindrical can and the cap assembly, wherein the gasket further includes an insulating member having a melting temperature higher than a melting temperature of the gasket.

Abstract: Various embodiments of the present invention relate to a secondary battery. A technical problem to be solved is to provide a secondary battery in which, when a can is compressed in a lateral direction thereof, a bending direction thereof is controlled such that a cap assembly (or a circuit interrupt device (CID)) is bent in an opposite direction of an electrode assembly and an electrical short-circuit phenomenon between the cap assembly and the electrode assembly can be thus prevented. To this end, the present invention provides a secondary battery comprising: a cylindrical can; an electrode assembly received in the cylindrical can; and a cap assembly for sealing the cylindrical can, wherein the cap assembly comprises a cap-down having a notch for inducing bending, which allows the cap assembly to be bent in an opposite direction of the electrode assembly when the cylindrical can is compressed in a direction perpendicular to a longitudinal direction of the cylindrical can.