Abstract: Disclosed is a laser keyhole welding structure and a keyhole welding method of an aluminum material which stably suppress the generation of sputtering to ensure a reliable electrical connection and obtain a mechanically strong connection. To achieve this, a laser keyhole welding structure of an aluminum material is formed by welding an aluminum material element constituting an electronic component by irradiating a laser beam to the electronic component, in which a tapered portion spread angle (?) of an upper portion of a welding nugget to be formed is 45° or less. Also disclosed is a laser keyhole welding structure of an aluminum material.

Abstract: An electricity storage device includes an electricity storage element that is constituted by an electrode body in a positive side and an electrode body in a negative side that face each other while holding a separator; a sealing member that seals a case member accommodating the electricity storage element; at least one electrode protrusion that is either of the electrode bodies, which protrudes from an element end-face of the electricity storage element, at least one current collector plate that is connected to the electrode protrusion; and a terminal member that is installed in the sealing member, a lateral face of the terminal member being connected to a lateral face of the current collector plate.

Abstract: Disclosed is a laser keyhole welding structure and a keyhole welding method of an aluminum material which stably suppress the generation of sputtering to ensure a reliable electrical connection and obtain a mechanically strong connection. To achieve this, a laser keyhole welding structure of an aluminum material is formed by welding an aluminum material element constituting an electronic component by irradiating a laser beam to the electronic component, in which a tapered portion spread angle (?) of an upper portion of a welding nugget to be formed is 45° or less. Also disclosed is a laser keyhole welding structure of an aluminum material.

Abstract: A capacitor includes a capacitor element that is a wound element or an element other than the wound element, and that includes electrode bodies each of which is in an anode side and a cathode side, and separators that intervenes between the electrode bodies; a sealing member that seals an opening of a case member accommodating the capacitor element; at least one electrode protrusion that protrudes from one of the electrode bodies on an element end-face of the capacitor element, at least one of current collector plate that is connected to the electric protrusion; and at least one terminal member that is disposed in the sealing member, and is superposed on the current collector plate, a side face part of the terminal member being welded to a side face part of the current collector plate.

Abstract: A capacitor includes: an anode part that is drawn from an anode body of a capacitor element to an element end-face, to be formed over the element end-face; a cathode part that is drawn from a cathode body of the capacitor element to the element end-face, to be formed over the element end-face; an anode terminal member that is disposed in a sealing member; a cathode terminal member that is disposed in the sealing member; an anode current collector plate that is connected to the anode part, and is also connected to the anode terminal member; and a cathode current collector plate that is connected to the cathode part, and is also connected to the cathode terminal member.

Abstract: A capacitor includes: an anode part that is drawn from an anode body of a capacitor element to an element end-face, to be formed over the element end-face; a cathode part that is drawn from a cathode body of the capacitor element to the element end-face, to be formed over the element end-face; an anode terminal member that is disposed in a sealing member; a cathode terminal member that is disposed in the sealing member; an anode current collector plate that is connected to the anode part, and is also connected to the anode terminal member; and a cathode current collector plate that is connected to the cathode part, and is also connected to the cathode terminal member.

Abstract: An electricity storage device includes an electricity storage element that is constituted by an electrode body in a positive side and an electrode body in a negative side that face each other while holding a separator; a sealing member that seals a case member accommodating the electricity storage element; at least one electrode protrusion that is either of the electrode bodies, which protrudes from an element end-face of the electricity storage element, at least one current collector plate that is connected to the electrode protrusion; and a terminal member that is installed in the sealing member, a lateral face of the terminal member being connected to a lateral face of the current collector plate.

Abstract: A capacitor includes a capacitor element that is a wound element or an element other than the wound element, and that includes electrode bodies each of which is in an anode side and a cathode side, and separators that intervenes between the electrode bodies; a sealing member that seals an opening of a case member accommodating the capacitor element; at least one electrode protrusion that protrudes from one of the electrode bodies on an element end-face of the capacitor element, at least one of current collector plate that is connected to the electric protrusion; and at least one terminal member that is disposed in the sealing member, and is superposed on the current collector plate, a side face part of the terminal member being welded to a side face part of the current collector plate.

Abstract: A process for manufacturing a leadfree lead terminal for capacitor, in which whisker generation can be avoided. There is provided a process for manufacturing a lead terminal for capacitor, comprising bringing metal wire (1) furnished with metal plating layer (2) composed mainly of tin into abuttal on aluminum wire (5) and carrying out arc welding between the metal wire (1) and the aluminum wire (5), wherein portion (9) devoid of the metal plating layer is formed at one end of the metal wire (1), the one end of the metal wire (1) is brought into abuttal on one end of the aluminum wire (5) and thereafter arc welding is carried out therebetween.

Abstract: A plurality of anode foils (7) and a plurality of cathode foils (8) respectively having connecting portions (12a, 12b) are alternately arranged with insulating separators (9) interposed therebetween. The connecting portions (12a, 12b) of the stacked electrode foils (7, 8) are respectively connected and united electrically and mechanically by friction stir welding, thereby forming a capacitor element (5). The capacitor element (5) is housed in a case (2), and the connecting portions (12a, 12b) are respectively connected to a positive electrode external terminal (4) and a negative electrode external terminal (4).

Abstract: A plurality of anode foils (7) and a plurality of cathode foils (8) respectively having connecting portions (12a, 12b) are alternately arranged with insulating separators (9) interposed therebetween. The connecting portions (12a, 12b) of the stacked electrode foils (7, 8) are respectively connected and united electrically and mechanically by friction stir welding, thereby forming a capacitor element (5). The capacitor element (5) is housed in a case (2), and the connecting portions (12a, 12b) are respectively connected to a positive electrode external terminal (4) and a negative electrode external terminal (4).