Abstract: A cleaning system may include two or more dummy cans configured to clean a surface of a crimping device. The crimping device may be used for a process of crimping a cylindrical secondary battery for sealing an opened upper end of a battery can in which an electrode assembly and a cap assembly are accommodated. The two or more dummy cans each may include a brush provided on an outer surface thereof, and the surface of the crimping device is cleaned by the brush.

Abstract: A button-type secondary battery includes an electrode assembly; a lower can into which the electrode assembly is disposed; and an upper can configured to cover an opening of an upper end of the lower can. A beading part recessed inward is provided in an upper portion of the lower can. An end of the upper can has a bent shape so the upper can and the lower can are coupled to each other while an end point of the end of the upper can is inserted into the beading part.

Abstract: A button-type secondary battery includes a lower can; an upper can is coupled to the lower can; an electrode assembly is on the lower can in an accommodation space defined between the lower can and the upper can. The lower can includes a first planar part, on which the electrode assembly is seated, and a first sidewall disposed vertically along a circumference of the first planar part such that a concave portion is defined in the first sidewall. The upper can includes a second planar part, which has an area that covers an opened top surface of the lower can, and a second sidewall disposed vertically along a circumference of the second planar part such that a convex portion is on an inner surface of the second sidewall. When the sidewall is coupled to be placed outside the first sidewall, the convex portion is fitted into the concave portion.

Abstract: Discussed is a welding quality inspection apparatus that can include a measurement unit including a first resistance measurement member to measure a first resistance value by directly contacting a first measurement point and a second resistance measurement member to measure a second resistance value by directly contacting a second measurement point; and a control unit to judge that a welding defect occurs and sorts a defective item when the first resistance value or the second resistance value obtained from the measurement unit exceeds a threshold resistance value. The first measurement point may be positioned on a first electrode terminal exposed to an outside of the secondary battery, and the second measurement point may be positioned on the welding portion of the first electrode current collector provided inside the secondary battery.

Abstract: A button-type secondary battery includes an electrode assembly having a first electrode with a first electrode tab and a second electrode with a second electrode tab; a can accommodating the electrode assembly and to which the first electrode tab is connected; a top cap coupled to an opening of the can and to which the second electrode tab is connected; and a first insulation member insulating the first electrode tab. The first electrode tab includes a first coupling surface coupled to the first electrode and a second coupling surface extending from the first coupling surface and coupled to the can. The first insulation member includes a first insulator attached to an outer circumferential surface of the electrode assembly to cover the first coupling surface, and a second insulator horizontally extending from an upper end of the first insulator toward a top surface of the electrode assembly.

Abstract: A button-type secondary battery includes an electrode assembly; a lower can into which the electrode assembly is disposed; and an upper can configured to cover an opening of an upper end of the lower can. A beading part recessed inward is disposed at an upper portion of the lower can. The upper end of the lower can disposed above the beading part has a bent shape and configured to surround an edge end of the upper can so that the upper can and the lower can are coupled to each other.

Abstract: A button-type secondary battery includes an electrode assembly; a lower can having an accommodation space in which the electrode assembly is accommodated; an upper can coupled to the lower can to cover the accommodation space; a gasket sealing a gap between the lower can and the upper can and to electrically insulate the lower can from the upper can while being inserted into a coupled portion of the lower can and the upper can; and a first electrode tab including a first coupling part coupled to a first electrode of the electrode assembly and a second coupling part coupled between the gasket, which is disposed at the coupled portion of the lower can and the upper can, and the upper can. The second coupling part is coupled between the gasket and the upper can by a pressure generated when the lower and upper cans are coupled to each other.

Abstract: A cylindrical secondary battery includes an electrode assembly provided with an electrode tab; a battery can configured to accommodate the electrode assembly through an opening defined at one side thereof; a cap plate covering the opening; a collector disposed between the electrode assembly and the cap plate to electrically connect the electrode tab to the battery can; and a spacer having a body part disposed between the collector and the cap plate, a sealing part configured to seal a gap between the battery can and the cap plate, and a connection part configured to connect the body part to the sealing part. The collector includes a center part; a can coupling part coupled to the battery can; and a bridge connecting the center part to the can coupling part. The bridge of the collector and the connection part of the spacer do not overlap other.

Abstract: A button-type secondary battery according to the present disclosure includes: an electrode assembly; a lower can configured to accommodate the electrode assembly; an upper can coupled to an opening of the lower can; a gasket configured to insulate a coupling portion between the lower can and the upper can; and a center part provided at a core portion of the electrode assembly, wherein the center part includes: a center pin inserted into the core portion of the electrode assembly; and an upper plate provided with an upper cover surface provided on an upper end of the center pin to protect an upper portion of the electrode assembly, wherein an edge of the upper cover surface is provided to be supported on an inner wall of the lower can.

Abstract: A semiconductor device with multiple zero differential transconductance includes: a conductive substrate; a first insulating layer and a second insulating layer disposed on the conductive substrate; a first semiconductor and a second semiconductor disposed on first portions of the first insulating layer and the second insulating layer, respectively; a first buffer layer and a second buffer layer disposed on electrode contact areas of the first semiconductor and the second semiconductor, respectively; and an anode electrode and a cathode electrode disposed on second portions, which are different from the first portions, of the first insulating layer and the second insulating layer and on the first buffer layer and the second buffer layer, respectively, wherein the first semiconductor and the second semiconductor are disposed in parallel with each other and connected by the anode electrode and the cathode electrode.

Abstract: A forming device and a forming method thereof bends an electrode tab portion that is exposed to the end portion of a jelly roll-type electrode assembly in the axial direction thereof, in a radial direction. The forming device may include a forming jig bending the electrode tab, and a flattening jig flattening the bent electrode tab further. The forming jig comprises a pre-forming perimeter surface and a bend inducing surface. The pre-forming perimeter surface has an inner radius that increases from a base end toward a leading end elongated in a pressing direction. The bend inducing surface connects to the base end of the pre-forming perimeter surface, and extends inwards, in the radial direction.

Abstract: A manufacturing method for providing a corrosion prevention layer on a cylindrical secondary battery including a jelly-roll type electrode assembly having a structure in which a first electrode, a second electrode, and a separator interposed therebetween are wound in one direction based on a winding axis, a battery can accommodating the electrode assembly and the battery can including a metal plated layer, and a connection lead plate joining the battery can and the electrode assembly, of which the method includes applying a resin to a portion where the metal plated layer is welded to the connection lead plate, and forming the corrosion prevention layer by curing the resin by ultraviolet rays. The resin includes one or more liquid materials. The one or more liquid materials are ultraviolet curable. The one or more liquid materials have a viscosity of 1 cP to 5000 cP.

Abstract: A method of manufacturing a cylindrical battery case includes performing an ironing process, which is one of the processes of manufacturing the battery case, a plurality of times in order to decrease the surface roughness of the battery case, thereby improving the corrosion characteristics of the battery case. The surface roughness of the cylindrical battery case is decreased by performing a thickness reducing process when a process for forming the outer circumferential surface of a body of the cylindrical battery case is performed at the time of manufacturing the cylindrical battery case. In addition, corrosion characteristics are improved for respective values of the surface roughness.

Abstract: A cylindrical secondary battery, a battery pack, and a vehicle are provided. The cylindrical secondary battery includes an electrode assembly having a first electrode tab at a first end of the electrode assembly a battery can configured to accommodate the electrode assembly through an opening portion formed at one side of the battery can, a current collecting plate including three or more tab coupling portions electrically connected to the first electrode tab, and a can coupling portion extending from ends of the tab coupling portions toward the opening portion of the battery can and having a continuous outer peripheral surface electrically connected to an inner surface of the battery can, and a top cap configured to cover the opening portion of the battery can.

Abstract: A multi-roller system includes at least two pairs of rollers, in which the at least two pairs of rollers rotate about independent rotation axes, respectively. Changes in heights of the at least two pairs of rollers are controlled. Cross-sections of the at least two pairs of more of rollers have different shapes. The at least two pairs of rollers approach and press the battery can at intervals between the at least two pairs of rollers.

Abstract: Discussed is a welding quality inspection apparatus that can include a measurement unit including a first resistance measurement member to measure a first resistance value by directly contacting a first measurement point and a second resistance measurement member to measure a second resistance value by directly contacting a second measurement point; and a control unit to judge that a welding defect occurs and sorts a defective item when the first resistance value or the second resistance value obtained from the measurement unit exceeds a threshold resistance value. The first measurement point may be positioned on a first electrode terminal exposed to an outside of the secondary battery, and the second measurement point may be positioned on the welding portion of the first electrode current collector provided inside the secondary battery.

Abstract: A button-type secondary battery includes a lower can; an upper can is coupled to the lower can; an electrode assembly is on the lower can in an accommodation space defined between the lower can and the upper can. The lower can includes a first planar part, on which the electrode assembly is seated, and a first sidewall disposed vertically along a circumference of the first planar part such that a concave portion is defined in the first sidewall. The upper can includes a second planar part, which has an area that covers an opened top surface of the lower can, and a second sidewall disposed vertically along a circumference of the second planar part such that a convex portion is on an inner surface of the second sidewall. When the sidewall is coupled to be placed outside the first sidewall, the convex portion is fitted into the concave portion.

Abstract: A secondary battery includes an electrode assembly in which first and second electrodes and a separator provided between the first and second electrodes are wound, the first and second electrodes each including a non-coated portion, exposed to an outside of the separator, and having no active material applied thereto; and a current collecting plate provided at one end of the electrode assembly at which the non-coated portion of the first electrode is exposed, the current collecting plate including a central portion, and a peripheral portion provided around the central portion and configured to adjoin one end of the electrode assembly, in which the peripheral portion includes one or more first through-holes penetrated by at least a part of the non-coated portion of the first electrode. A battery pack having a plurality of the secondary batteries and a vehicle having the battery pack are also provided.

Abstract: A button-type secondary battery includes an electrode assembly; a lower can into which the electrode assembly is disposed; and an upper can configured to cover an opening of an upper end of the lower can. A beading part recessed inward is disposed at an upper portion of the lower can. The upper end of the lower can disposed above the beading part has a bent shape and configured to surround an edge end of the upper can so that the upper can and the lower can are coupled to each other.

Abstract: A button-type secondary battery includes an electrode assembly; a lower can into which the electrode assembly is disposed; and an upper can configured to cover an opening of an upper end of the lower can. A beading part recessed inward is provided in an upper portion of the lower can. An end of the upper can has a bent shape so the upper can and the lower can are coupled to each other while an end point of the end of the upper can is inserted into the beading part.