Abstract: The present invention relates to an automatic separator supply apparatus. The automatic separator supply apparatus according to an embodiment of the present invention is an apparatus for supplying a separator winding roll, the apparatus including: a transfer unit which includes a unit shaft for receiving the separator winding roll and moves the received separator winding roll; and an unwinder which includes an unwinder shaft, to which the separator winding roll moved by the transfer unit is mounted, and unwinds the separator from the separator winding roll mounted to the unwinder shaft when the electrode and the separator are wound. The transfer unit mounts the separator winding roll to the unwinder shaft of the unwinder after the unit shaft is aligned with the unwinder shaft of the unwinder.

Abstract: A cylindrical battery case for a secondary battery includes a body having a steel sheet including a nickel coating layer formed thereon, a step portion on the body, and a taper and a flange extending from the body. A surface roughness (Ra) of the battery case ranges from 0.022 ?m to 0.040 ?m. Also provided is a device including such a secondary battery. The device is selected from a group consisting of an electronic device, an electric vehicle, a hybrid electric vehicle, and a power storage system.

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 battery connector including a conductive plate configured to contact a first battery and a second battery so as to electrically connect the first battery and the second battery to each other, an upper fixer configured to be coupled the first battery, and a lower fixer configured to be coupled to the second battery.

Abstract: A tray assembly for loading a battery cap includes at least one first tray having a top surface, in which first grooves are provided, and a bottom surface, in which second grooves are provided, and at least one second tray having a top surface, in which third grooves are defined, and a bottom surface, in which fourth grooves are defined and disposed above or below the first tray. When the first tray is disposed above the second tray, each of the second grooves and each of the third grooves communicate with each other to provide a communication space. When the first tray is disposed below the second tray, each of the first grooves and each of the fourth grooves communicate with each other to provide a communication space. The battery cap is mounted in an erect state in the communication space provided by the first tray and the second tray.

Abstract: Disclosed is a cylindrical battery cell configured such that the outer surface of a cylindrical case excluding electrode terminals is wrapped by a heat-shrinkable tube, wherein the heat-shrinkable tube includes a tube substrate made of a polyester-based resin, the tube substrate being heat-shrinkable; a reinforcement agent, made of a nylon-based resin, for increasing the tensile stress and operating temperature of the heat-shrinkable tube; and an ultraviolet (UV) absorber for absorbing ultraviolet rays radiated to the heat-shrinkable tube and emitting the absorbed ultraviolet rays as thermal energy to prevent the scission of polymer chains of the nylon-based resin or the polyester-based resin as the result of reaction with oxygen.

Abstract: Disclosed is a cylindrical battery cell in which a heat-shrinkable tube wraps an outer surface of a cylindrical case of the cylindrical battery cell except electrode terminals, the heat-shrinkable tube including: a base material, which is a polyester resin, capable of shrinking by heat; a supplement, which is a nylon resin, capable of increasing a tensile strength and operating temperature of the heat-shrinkable tube; and an ultraviolet stabilizer capable of inhibiting a chain reaction of free radicals generated by cleavage of polymer chains of the nylon resin or the polyester resin, when the heat-shrinkable tube is exposed to an ultraviolet ray irradiation.

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: Provided are a secondary battery that is capable of preventing a can member from corroding and a method for manufacturing the same. The secondary battery includes a can member defining an outer appearance of the secondary battery, a top cap assembly an opening of the can member, a gasket insulating the can member and the top cap assembly from each other, and a fracture part disposed on an inner circumference of the opening. The fracture part is blocked from the outside by the gasket.

Abstract: A battery connector including a conductive plate configured to contact a first battery and a second battery so as to electrically connect the first battery and the second battery to each other, an upper fixer configured to be coupled the first battery, and a lower fixer configured to be coupled to the second battery.

Abstract: Disclosed is a cylindrical battery cell configured such that the outer surface of a cylindrical case excluding electrode terminals is wrapped by a heat-shrinkable tube, wherein the heat-shrinkable tube includes a tube substrate made of a polyester-based resin, the tube substrate being heat-shrinkable; a reinforcement agent, made of a nylon-based resin, for increasing the tensile stress and operating temperature of the heat-shrinkable tube; and an ultraviolet (UV) absorber for absorbing ultraviolet rays radiated to the heat-shrinkable tube and emitting the absorbed ultraviolet rays as thermal energy to prevent the scission of polymer chains of the nylon-based resin or the polyester-based resin as the result of reaction with oxygen.

Abstract: Disclosed is a cylindrical battery cell in which a heat-shrinkable tube wraps an outer surface of a cylindrical case of the cylindrical battery cell except electrode terminals, the heat-shrinkable tube including: a base material, which is a polyester resin, capable of shrinking by heat; a supplement, which is a nylon resin, capable of increasing a tensile strength and operating temperature of the heat-shrinkable tube; and an ultraviolet stabilizer capable of inhibiting a chain reaction of free radicals generated by cleavage of polymer chains of the nylon resin or the polyester resin, when the heat-shrinkable tube is exposed to an ultraviolet ray irradiation.

Abstract: Provided are a secondary battery that is capable of preventing a can member from corroding and a method for manufacturing the same. The secondary battery includes a can member defining an outer appearance of the secondary battery, a top cap assembly an opening of the can member, a gasket insulating the can member and the top cap assembly from each other, and a fracture part disposed on an inner circumference of the opening. The fracture part is blocked from the outside by the gasket.

Abstract: Disclosed is a secondary battery. According to the present invention, a charging/discharging pin is prevented from being separated from a top cap while the secondary is charged and discharged to improve safety during the charging/discharging of the secondary battery. According to an aspect of the present invention, the secondary battery includes a can accommodating an electrode assembly, a top cap provided on an upper portion of the can, and a groove defined in a surface of the top cap and having a shape that is recessed downward. When the top cap is viewed from an upper side, the groove has a closed curve shape.