Abstract: Described is a cylindrical secondary battery in which an inner surface of a can is coated to insulate an electrode assembly and a can from each other and to improve heat resistance of the can. The cylindrical secondary battery may include an electrode assembly, a can in which the electrode assembly is accommodated and of which one end is opened so as to be electrically connected to the electrode assembly, a cap plate electrically connected to the electrode assembly, and a rivet terminal insulated from the can and the cap plate, which may be configured to seal one end of the can and which may be insulated from the can. A first coating layer may be provided on at least a portion of an inner surface of the can.

Abstract: The present invention relates to a secondary battery and, in order to resolve a technical problem, provides a secondary battery, which blocks a leakage welding current when welding a current collecting plate to a can by coupling an insulating plate to the current collecting plate, and thus increases the welding strength between the current collecting plate and the can, improves welding strength distribution, and prevents damage between the current collecting plate and the can. To this end, disclosed is a secondary battery comprising: a cylindrical can having an opening; an electrode assembly which is accommodated in the opening of the cylindrical can and which is wound in a cylinder shape; a cap assembly which is electrically connected to the electrode assembly and which seals the cylindrical can; a current collecting plate for electrically connecting the electrode assembly with the cylindrical can; and an insulating plate inserted between the current collecting plate and the cylindrical can.

Abstract: A secondary battery includes a case, an electrode assembly in the case, and including first tabs protruding in a first direction, and second tabs protruding in the first direction, a first current collector plate electrically connected to the first tabs, a second current collector plate electrically connecting the second tabs to the case, and a rivet terminal electrically connected to the first current collector plate and passing through the case.

Abstract: A cylindrical secondary battery includes: an electrode assembly; a cylindrical can accommodating the electrode assembly and having a terminal hole at a first end; and a terminal portion coupled to the first end of the can and electrically connected to the electrode assembly, and the can further includes a coupling groove and a coupling protrusion adjacent to the terminal hole on a portion through which the terminal hole passes. In the cylindrical secondary battery according to embodiments of the present disclosure, a sealing force of the cylindrical secondary battery may be increased by providing a groove and a protrusion in the can that is a region to which a rivet terminal is coupled.

Abstract: A secondary battery includes an electrode assembly including a first electrode plate, a second electrode plate, and a separator interposed therebetween, a can accommodating the electrode assembly, and a terminal portion including a rivet terminal coupled to one side of the can in a longitudinal direction and electrically connected to the first electrode plate, and an insulator between the can and the rivet terminal to insulate the can from the rivet terminal, and having a stepped structure in an area contacting the rivet terminal. By reducing or minimizing a height difference between the positive electrode terminal and the insulator, shape deformation of the electrode assembly can be reduced or prevented during the manufacturing process. By reducing the thickness and weight of the insulator, the size of the electrode assembly can be increased, and the capacity of the secondary battery can be increased.

Abstract: A cylindrical secondary battery includes an electrode assembly; a cylindrical can accommodating the electrode assembly; and a terminal portion including a rivet terminal coupled to one side in the longitudinal direction of the can and electrically connected to the electrode assembly and at least one insulator between the can and the rivet terminal to insulate the can and the rivet terminal from each other. The battery also includes a rotation preventing portion on the can and/or the terminal portion. Since a structure for preventing rotation of the rivet terminal is provided on the upper surface of the can or the rivet head or the main body to which the rivet terminal is fastened, the rivet terminal may not rotate due to an external force or vibration. Therefore, the stability and reliability of the secondary battery can be improved.

Abstract: The present invention relates to a secondary battery in which an electrode assembly and a current collection plate may be easily welded and safety may be improved. As an embodiment, disclosed is a secondary battery comprising: an electrode assembly which is formed by winding a first electrode plate having a first electrode uncoated part, a separator, and a second electrode plate having a second electrode uncoated part, the first electrode uncoated part protruding upwards, and the second electrode uncoated part protruding downwards; and a first current collection plate which is electrically connected to the first electrode uncoated part and has a concave-convex part protruding downwards, wherein the width of the concave-convex part becomes wider from the center of the first current collection plate toward the outer periphery thereof.

Abstract: A cylindrical secondary battery includes a can and a terminal part including: a first terminal outside of the can; and a second terminal coupled to a terminal hole of the can, arranged inside and outside of the can, and riveted to the first terminal from an outside of the can. According to embodiments of the present disclosure, plastic deformation of a rivet terminal occurs outside of a can, and there is no limitation on the shape of the rivet terminal inside the can. In addition, the rivet terminal may be processed regardless of a size or height of the can, and there is no interference with the can, and a processing time may be reduced.

Abstract: A cylindrical secondary battery including: an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a case accommodating the electrode assembly and having an open lower end, the case being electrically connected to the second electrode plate; a first current collector plate between an upper surface of the electrode assembly and the case and being electrically connected to the first electrode plate; a terminal extending through an upper surface of the case and having a lower end electrically and mechanically coupled to an upper surface of the first current collector plate, the terminal having: a welding groove having a depth downward from an upper surface thereof; and a sealing member filling the welding groove; and a cap plate sealing the lower end of the case.

Abstract: A secondary battery includes: an electrode assembly; a can having a lower surface and a side surface and accommodating the electrode assembly therein; a cap plate coupled to an upper end of the can; a terminal on the lower surface of the can; and an insulator having a plate-shaped portion between the electrode assembly and the lower surface of the can and a wing portion extending upwardly from a circumference of the plate-shaped portion. The wing portion has a cutout portion.

Abstract: A cylindrical secondary battery includes: an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a cylindrical case accommodating the electrode assembly and electrically connected to the second electrode plate; a terminal coupled to a lower surface of the case through a first gasket and electrically connected to the first electrode plate; a cap plate sealing the upper end of the case; and a second gasket between the case and the cap plate, the second gasket having: a sidewall portion in close contact with a side surface of the case; and a bottom portion extending inwardly from a bottom end of the sidewall portion and having at least one opening formed therein. The bottom portion of the second gasket having flange parts extending from the sidewall portion in an edge region and a bridge part connecting the flange parts to each other.

Abstract: A cylindrical secondary battery includes: an electrode assembly including a positive electrode plate, a separator, and a negative electrode plate; a cylindrical can accommodating the electrode assembly and being electrically connected to the negative electrode plate, a lower end of the cylindrical can being open; a rivet terminal passing through an upper surface of the cylindrical can and electrically connected to the positive electrode plate; and a cap plate sealing the lower end of the cylindrical can, the cap plate having no electrical polarity.

Abstract: A secondary battery includes: an electrode assembly; a can having an open upper end and accommodating the electrode assembly; and a cap plate coupled to the upper end of the can and having a welding portion welded in contact with an upper end of the electrode assembly.

Abstract: A cylindrical secondary battery allowing the loss of space inside a case to be reduced is provided. As an example, a cylindrical secondary battery includes an electrode assembly including a first electrode plate, a separator, and a second electrode plate, a case, a terminal passing through an upper surface portion of the case and coupled to the case through a first gasket, a first current collector plate arranged between an upper surface of the electrode assembly and the case and electrically connecting the first electrode plate and the terminal, and a cap plate configured to seal a lower end portion of the case, the case including the upper surface portion having a flat plate shape, a central portion having a terminal hole and protruding outward further than the upper surface portion, and a side surface portion extending downward from an edge of the upper surface portion.

Abstract: A cylindrical secondary battery includes: an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a case accommodating the electrode assembly and electrically connected to the second electrode plate; a terminal passing through a lower surface of the case and electrically connected to the first electrode plate; and a cap plate sealing an upper end portion of the case and having a vent. The vent is a thinner portion of the cap plate than other regions thereof and has a central notch having a ring shape and being at a central portion of the cap plate and an inner peripheral notch having a line shape extending from the central notch toward an edge of the cap plate.

Abstract: A cylindrical secondary battery includes: an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a case in which the electrode assembly is accommodated, and which includes a lower end open and is electrically connected to the second electrode plate; a first current collector plate which is between an upper surface of the electrode assembly and the case and is electrically connected to the first electrode plate; a terminal which penetrates an upper surface of the case and includes a lower end electrically and mechanically coupled to an upper surface of the first current collector plate; and a cap plate which seals the lower end of the case, and the terminal includes a welding groove having a depth downward from an upper surface of the terminal.

Abstract: Provided is a battery provided with a collector plate including a fuse part that blocks current if short circuit or overcurrent occurs. For example, disclosed is a battery including an electrode assembly including a positive electrode plate, a separator, and a negative electrode plate, a case accommodating the electrode assembly, and electrically connected to the negative electrode plate, a rivet terminal electrically connected to the positive electrode plate, and embedded in a bottom surface of the case, a cap plate sealing an upper portion of the case, and a positive electrode collector plate below the electrode assembly, and including a terminal connection part connected to the rivet terminal, an electrode plate connection part connected to the positive electrode plate, and a fuse part between the terminal connection part and the electrode plate connection part.

Abstract: An embodiment of the present invention relates to a cylindrical secondary battery in which a positive electrode terminal is adhered and fixed to a cylindrical can by an insulating sheet, and thus sealing between the cylindrical can and the positive electrode terminal can be facilitated due to an increased contact area.

Abstract: A cylindrical secondary battery includes: an electrode assembly including a positive electrode plate, a separator, and a negative electrode plate; a cylindrical can accommodating the electrode assembly, a lower end of the cylindrical can being electrically connected to the negative electrode plate; a terminal passing through a top surface of the cylindrical can and electrically connected to the positive electrode plate; and a cap plate coupled at the lower end of the cylindrical can. The cap plate is sealed to the lower end of the cylindrical can by welding.

Abstract: A technical object to be solved according to the present disclosure is to provide a secondary battery which has reduced electrical resistance by directly connecting an electrode assembly to a can and/or a terminal without lead tabs and also has an increased battery capacity by removing lead tabs. To this end, the present disclosure provides a secondary battery comprising: a can; an electrode assembly accommodated in the can and including a first uncoated portion extending in a first direction and a second uncoated portion extending in a second direction opposite to the first direction; a first current collector plate electrically connected to the first uncoated portion of the electrode assembly; a first terminal portion coupled to the can and electrically connected to the first current collector plate; and a second terminal portion coupled to the can and electrically connected to the second uncoated portion of the electrode assembly.