A rechargeable battery according to an embodiment of the present invention includes: an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode; a case including an opening in one side and receiving the electrode assembly; and a cap assembly combined to the opening and closing and sealing the case, wherein the cap assembly includes a cap plate combined to the opening and including a terminal hole, a terminal plate combined to the top of the cap plate to cover the terminal hole, an upper insulator disposed at the top of the cap plate to be provided between the cap plate and the terminal plate, and a lower insulator disposed at a bottom of the cap plate and including an edge disposed near the case and extending downward.

A rechargeable battery according to an embodiment of the present invention includes: an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode; a case including an opening in one side and receiving the electrode assembly; and a cap assembly combined to the opening and closing and sealing the case, wherein the cap assembly includes a cap plate combined to the opening and including a terminal hole, a terminal plate combined to the top of the cap plate to cover the terminal hole, an upper insulator disposed at the top of the cap plate to be provided between the cap plate and the terminal plate, and a lower insulator disposed at a bottom of the cap plate and including an edge disposed near the case and extending downward.

At one edge of a positive electrode plate in a winding axis direction of an electrode body, two positive electrode tabs per turn are provided to protrude from the edge. At the other edge of a negative electrode plate in the winding axis direction of the electrode body, two negative electrode tabs per turn are provided to protrude from the edge. The multiple positive electrode tabs provided to protrude from the positive electrode plate include multiple types of positive electrode tabs having different protrusion lengths and proximal end widths, and the multiple negative electrode tabs provided to protrude from the negative electrode plate include multiple types of negative electrode tabs having different protrusion lengths and base end widths.

At one edge of a positive electrode plate in a winding axis direction of an electrode body, two positive electrode tabs per turn are provided to protrude from the edge. At the other edge of a negative electrode plate in the winding axis direction of the electrode body, two negative electrode tabs per turn are provided to protrude from the edge. The multiple positive electrode tabs provided to protrude from the positive electrode plate include multiple types of positive electrode tabs having different protrusion lengths and proximal end widths, and the multiple negative electrode tabs provided to protrude from the negative electrode plate include multiple types of negative electrode tabs having different protrusion lengths and base end widths.

The present invention relates to a button-type secondary battery including: a lower can serving as a first electrode terminal; an upper can coupled to surround the lower can and serving as a second electrode terminal; and a gasket provided between the lower can and the upper can, wherein a recessed lower insertion groove and a recessed upper insertion groove are formed in a surface of the lower can and a surface of the upper can, which are in close contact with the gasket, respectively, the lower insertion groove and the upper insertion groove are spaced apart from each other so as not to face each other, and a sealing protrusion having a closed curve shape and being in close contact with the lower can and the upper can to increase in sealing force is formed on the gasket.

The present invention relates to a button-type secondary battery including: a lower can serving as a first electrode terminal; an upper can coupled to surround the lower can and serving as a second electrode terminal; and a gasket provided between the lower can and the upper can, wherein a recessed lower insertion groove and a recessed upper insertion groove are formed in a surface of the lower can and a surface of the upper can, which are in close contact with the gasket, respectively, the lower insertion groove and the upper insertion groove are spaced apart from each other so as not to face each other, and a sealing protrusion having a closed curve shape and being in close contact with the lower can and the upper can to increase in sealing force is formed on the gasket.

A cylindrical secondary battery includes: an electrode assembly including a positive electrode plate having a positive electrode multi-tab, a separator, and a negative electrode plate having a negative electrode multi-tab, the positive electrode plate, the separator, and the negative electrode plate being laminated and wound; a cylindrical can accommodating the electrode assembly; a cap plate coupled at an upper end of the cylindrical can and being electrically connected to the negative electrode multi-tab; and a positive electrode terminal protruding upwardly through the cap plate and being electrically connected to the positive electrode multi-tab.

A method includes, by a folding station: receiving an anode assembly including anode collectors connected by anode interconnects and coated with a separator; receiving a cathode assembly including cathode collectors connected by cathode interconnects; locating a first anode collector over a folding stage; locating a first cathode collector over the first anode collector to form a first battery cell between the first anode collector and the first cathode collector; folding a first anode interconnect to locate a second anode collector over the first cathode collector to form a second battery cell between the first cathode collector and the second anode collector; folding a first cathode interconnect to locate a second cathode collector over the second anode collector to form a third battery cell between the second anode collector and the second cathode collector; wetting the separator with solvated ions; and loading the anode and cathode assemblies into a battery housing.

An electrochemical cell is provided comprising a thin metal foil packaging made from at least one sheet of metal foil and having a perimeter extending around at least a portion of the electrochemical cell, as well as an electrochemical cell stack contained within the thin metal foil packaging, and a metal-to-metal welded seal around at least a portion of the perimeter of the thin metal foil packaging. The metal-to-metal welded seal is hermetic or nearly hermetic. Furthermore, the metal-to-metal welded seal is narrow, having a width of less than about 1 mm, and is less than about 5 mm away from the electrochemical cell stack. In some embodiments, the thin metal foil packaging functions not only as a hermetically or near hermetically sealed packaging, but also as either the negative or positive current collector, with one electrode of the cell bonded to the foil packaging. A method for making the foregoing electrochemical cell is also provided and involves using laser energy the metal-to-metal welded seal, wherein the laser energy is applied to the foil at high speed using a scanning laser.

An electrochemical cell is provided comprising a thin metal foil packaging made from at least one sheet of metal foil and having a perimeter extending around at least a portion of the electrochemical cell, as well as an electrochemical cell stack contained within the thin metal foil packaging, and a metal-to-metal welded seal around at least a portion of the perimeter of the thin metal foil packaging. The metal-to-metal welded seal is hermetic or nearly hermetic. Furthermore, the metal-to-metal welded seal is narrow, having a width of less than about 1 mm, and is less than about 5 mm away from the electrochemical cell stack. In some embodiments, the thin metal foil packaging functions not only as a hermetically or near hermetically sealed packaging, but also as either the negative or positive current collector, with one electrode of the cell bonded to the foil packaging. A method for making the foregoing electrochemical cell is also provided and involves using laser energy the metal-to-metal welded seal, wherein the laser energy is applied to the foil at high speed using a scanning laser.