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: The present invention relates to a secondary battery which can easily vent internal gas, thereby enhancing safety. Disclosed as an example is a secondary battery comprising: an electrode assembly; a case in which the electrode assembly is accommodated; and a cap assembly which is coupled to the top of the case and comprises a cap-up having opening, a safety vent provided under the cap-up and having a notch to be ruptured at a predetermined pressure or higher, and a cap-down provided under the safety vent and electrically connected to the electrode assembly, wherein the notch is exposed through the opening.

Abstract: A circuit board for an antenna according to an embodiment includes a core layer having a first surface and second surface that face each other, a second conductive layer disposed on the second surface of the core layer, and a first conductive layer disposed on the first surface of the core layer. The first conductive layer includes signal wirings, and a co-planar ground spaced apart from the signal wirings in a horizontal direction. The co-planar ground includes a first recess formed between end portions of neighboring signal wirings of the signal wirings.

Abstract: A technical problem to be solved according to an embodiment of the present invention is to provide a cylindrical secondary battery which can prevent components thereof from being deformed during manufacturing processes or in use. To this end, an embodiment of the present invention provides a cylindrical secondary battery comprising: a cylindrical can; an electrode assembly received in the cylindrical can; and a cap assembly covering the cylindrical can to seal the electrode assembly, wherein the cap assembly comprises a cap-up, a cap-down below the cap-up, and a safety vent between the cap-up and the cap-down, and the contact ratio between the safety vent and the cap-down ranges from 60% to 100%.

Abstract: A secondary battery includes: an electrode assembly; a case accommodating the electrode assembly; and a cap assembly coupled to an upper portion of the case. The cap assembly includes: a cap-up having a stress absorbing portion at an outer surface thereof and extending toward an inside of the case; a safety vent below the cap-up and having a notch; and a cap-down coupled to a lower portion of the safety vent.

Abstract: An antenna structure according to an embodiment includes an antenna device including an antenna unit, a circuit board electrically connected to the antenna unit, an insulating layer covering the antenna device and a portion of the circuit board, and an air layer formed between the antenna device and the insulating layer to partially cover the antenna unit.

Abstract: A secondary battery includes: a cylindrical can; an electrode assembly in the cylindrical can with an electrolyte, the electrode assembly including a cathode and an anode; a cap assembly coupled to a top of the cylindrical can; and a plate-shaped upper insulating plate between the electrode assembly and the cap assembly. The upper insulating plate includes: a main layer having a plurality of pores extending between an upper surface and a lower surface thereof; and an auxiliary layer adhered to at least one surface of the main layer and partially melted by the electrolyte.

Abstract: An antenna structure according to an embodiment includes an antenna device, a circuit board connected to the antenna device and including an inner insulation layer, and an outer insulation layer formed on the antenna device to cover the antenna unit and a portion of the circuit board. A portion of the inner insulation layer covered by the outer insulation layer may have a smaller thickness than a thickness of a portion of the inner insulation layer not covered by the outer insulation layer.

Abstract: The present invention relates to a secondary battery capable of reducing costs and increasing capacity. For example, disclosed is a secondary battery characterized by comprising: an electrode assembly including a first electrode, a second electrode, and a separator; a case accommodating the electrode assembly; and a cap assembly coupled to the upper portion of the case, wherein the first electrode comprises: a first current collector; a first current collecting tab structure extending from the first current collector and having a plurality of bent current collection parts; and a first lead tab electrically connected to the first current collecting tab structure, wherein, in the first current collecting tab structure, the width of the current collection parts increases from the center of the electrode assembly to the outside, and the distance between the current collection parts increases.

Abstract: The present invention relates to a secondary battery capable of improving the coupling force between a safety vent and a cap-up. For example, disclosed is a secondary battery comprising: an electrode assembly; a case for accommodating the electrode assembly; a cap assembly coupled to the upper part of the case; and a gasket interposed between the cap assembly and the case, wherein the cap assembly includes a cap-up and a safety vent, which is provided at the lower part of the cap-up and has a vent extension part extending to the upper part of the cap-up so as to encompass the edge of the cap-up, a welding region, in which the safety vent and the cap-up are welded and coupled by laser welding, is formed in the vent extension part, and the welding region is formed in a line shape.

Abstract: The present disclosure provides a secondary battery capable of increasing an operation time till a breakdown of a safety vent at a high temperature environment. As an example, disclosed is a secondary battery comprising: a can having a space therein; an electrode assembly accommodated in the space of the can; and a cap assembly for sealing the electrode assembly by blocking the can, wherein the cap assembly comprises a cap-up, a cap-down under the cap-up, and a safety vent between the cap-up and the cap-down, wherein the safety vent comprises a support protrusion formed on a contact surface coupled to the cap-up.

Abstract: An impedance converter for an antenna includes a first port receiving a power from an antenna driving integrated circuit, an impedance modulator connected to the first port to convert an impedance, and a second port connected to the modulator and configured to perform a feeding to an antenna unit. The second port has an impedance higher than that of the first port. Impedance mismatching is prevented by the impedance modulator to improve antenna properties.

Abstract: An antenna package includes an antenna device including an antenna dielectric layer and an antenna unit formed on the antenna dielectric layer, and an intermediate circuit board electrically connected to the antenna unit. The intermediate circuit board includes a core layer and a signal line formed on a surface of the core layer and electrically connected to the antenna unit. A width of one end portion of the signal line connected to the antenna unit is smaller than a width of the other end portion opposite to the one end portion of the signal line. Impedance mismatching is prevented by the construction of the signal line to improve antenna properties.

Abstract: A secondary battery includes: a cylindrical case; an electrode assembly in the cylindrical case; and a cap assembly configured to seal the cylindrical case and including a cap-down electrically connected to the electrode assembly, a cap-up coupled to an upper portion of the cap-down, and a vent plate between the cap-down and the cap-up, wherein the vent plate includes: a first plate; and a second plate coupled to the outside of the first plate, wherein the first plate has rigidity less than that of the second plate.

Abstract: A secondary battery includes: a cylindrical case; an electrode assembly in the cylindrical case; and a cap plate electrically connected to the electrode assembly and sealing the cylindrical case. The cap plate has a first flat portion at a center of the cap plate, a second flat portion outside the first flat portion, and a vent portion between the first flat portion and the second flat portion, and the vent portion has a thickness smaller than a thickness of the first flat portion or a thickness of the second flat portion.

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.

Abstract: The present invention relates to a secondary battery capable of improving the coupling force between a safety vent and a cap-up. For example, disclosed is a secondary battery comprising: an electrode assembly; a case for accommodating the electrode assembly; a cap assembly coupled to the upper part of the case; and a gasket interposed between the cap assembly and the case, wherein the cap assembly includes a cap-up and a safety vent, which is provided at the lower part of the cap-up and has a vent extension part extending to the upper part of the cap-up so as to encompass the edge of the cap-up, a welding region, in which the safety vent and the cap-up are welded and coupled by laser welding, is formed in the vent extension part, and the welding region is formed in a line shape.

Abstract: An embodiment of the present invention relates to a cylindrical secondary battery comprising: a cylindrical can; an electrode assembly accommodated in the cylindrical can; and a cap assembly comprising a cap-up, a cap-down arranged under the cap-up, a vent plate which is arranged between the cap-up and the cap-down, is separated from the cap-down, and has at least one notch formed thereon, and an insulating member inserted between the vent plate and the cap-down so as to insulate the vent plate and the cap-down from each other, wherein the cap assembly may further comprise a support member inserted between the vent plate and the cap-down, separated from the insulating member, and arranged on the inner side of the insulating member. According to the present invention; a deformation portion of a safety vent is supported to prevent deformation of the safety vent if stress occurs, and thus vent fracture can be stabilized.

Abstract: Provided is a cylindrical secondary battery. The cylindrical secondary battery includes a cylindrical can, an electrode assembly in which a first electrode plate, a second electrode plate, and a separator are wound and which is accommodated in the can, and a cap assembly which is insulated from the can and electrically connected to the electrode assembly and through which a degassing hole passes to communicate with the inside of the can. According to the embodiment, since a degassing function is applied to remove the gas generated before the product shipment, deformation of the can and the cap assembly may be reduced. In addition, swelling of the electrode assembly due to the generation of the internal gas may be prevented from occurring to reduce performance deterioration of the secondary battery.

Abstract: An embodiment of the present invention relates to a secondary battery, and a technical issue to address is to provide a secondary battery having excellent stability. To this end, disclosed is a secondary battery, comprising: an electrode assembly; a can which accommodates the electrode assembly and an electrolyte, and has a beading part formed above the electrode assembly; a cap assembly for sealing the can; and an adsorption member which is disposed in a space including at least a gap between the electrode assembly and the beading part, and which reacts with the electrolyte after a specific time period lapses after coming into contact with the electrolyte, thereby adsorbing the electrolyte.