A method for monitoring and/or controlling in a closed loop a laser welding process for welding together two workpieces of metallic material includes, during the laser welding process, scanning a melt pool and/or a melt bead using an optical coherence tomography (OCT) measurement beam in at least one line scan, determining an actual geometry of the melt pool and/or the melt bead based on the at least one line scan, and setting at least one welding parameter controlled in the closed loop based on a deviation of the actual geometry from a target geometry of the melt pool and/or the melt bead.

An ultrasonic welding device for a secondary battery is provided. The ultrasonic welding device is configured to weld an overlapping surface of an electrode tab and an electrode lead in an electrode assembly. The ultrasonic welding device includes an anvil on which the overlapping surface of the electrode tab and the electrode lead are disposed. A horn is configured to apply ultrasonic waves to the overlapping surface of the electrode tab and the electrode lead while pressing the overlapping surface. The overlapping surface is disposed on the anvil. An electrode tab measuring part is configured to measure a thickness of the electrode tab disposed on the overlapping surface. A pressure adjusting device is configured to adjust a pressure applied to the overlapping surface by the anvil and the horn according to the thickness value of the electrode tab. The thickness value is measured by the electrode tab measuring part.

The present invention provides a battery including a container, an electrode group including a positive electrode and a negative electrode, multiple current collecting tabs being extended from any one of the positive electrode and the negative electrode of the electrode group, and overlapped with one another; a lead bonded to at least one of the current collecting tabs by ultrasonic bonding, a lid configured to close an opening portion of the container, and an external terminal provided on the lid and connected to the at least one current collecting tab via the lead, in which the lead has a cross-sectional area that is increased in a middle of extension of the lead from an ultrasonic-bonded portion to the at least one of the current collecting tabs to the external terminal.

The invention relates to an electrical functional component (01) having at least one electrically conductive conductor strip (02), at least one contact pin (03) being arranged on the conductor strip (02), said contact pin (03) being able to be contacted with a contact element complementary in function, in particular a plug or a socket, and a contact zone being provided between the conductor strip (02) and the contact pin (03), said contact zone electrically connecting the conductor strip (02) and the contact pin (03) to each other, the electrically conductive contact zone being formed in the type of an annular cold-pressure-welded transition zone (11), the surface material of the conductor strip (02) and/or the surface material of the contact pin (03) comprising at least one cold-working area (12, 14) in the transition zone (11), a welding zone (13) being provided at least in sections on or in at least one cold-working zone (12, 14), the contact pin (03) and the conductor strip (02) being connected to each other in the welding zone (13) in an electrically conductive manner by material bonding.

A plurality of battery cells are connected by a busbar. Electrode terminals of the battery cells each include a protruding portion and a welding surface around the protruding portion. The busbar includes a welding plate portion being in surface-contact with the welding surface and having a cut-away portion for guiding the protruding portion, and an exposure gap that exposes the welding surface between the inner side of the cut-away portion and the protruding portion. The busbar is welded to the welding surface in a predetermined welding width (H) by both of a fillet weld part and a penetration welding portion such that the inner edge of the cut-away portion as the fillet weld part is welded to the welding surface, and the boundary between the busbar and the welding surface is welded by the penetration welding portion.

An electronic device includes an inlet including a ground terminal having a first surface and a second surface opposite from the first surface, a first casing metal plate configured to hold the inlet and contacting the first surface of the ground terminal, and a second casing metal plate contacting the second surface of the ground terminal.

A laser soldering device for laser soldering an electric circuit of a heating portion of an electronic cigarette, the soldering device including a head having an emitting area where a laser beam is emitted and a feeding device to feed a heating portion of an electronic cigarette along a feed path, where the heating portion faces the head at the emitting area. A movement device is operatively connected to the head to move the head between first and second points of the electric circuit such that the laser beam is perpendicular to the respective surface to be soldered at the first and second points to form first and second connections, respectively. The head generates two distinct pulses of the laser beam at the first and second points.

A connection arrangement comprising a metallic flat conductor having an at least quadrangular cross-sectional profile and at least two mutually opposing first and second surfaces extending at least partially parallel to one another in the longitudinal direction, at least two parts which are flat in the overlap region and which are formed as connecting lugs and which rest on the first surface with an overlap joint and project beyond one or both longitudinal edges of the flat conductor, characterized in that a metallic friction stir welded joint zone is formed starting from the second surface through the flat conductor towards the first surface and projecting into the connecting lugs.

A method of operating a thermocompression bonding system is provided. The method includes the steps of: bringing first conductive structures of a semiconductor element into contact with second conductive structures of a substrate in connection with a thermocompression bonding operation; and moving the semiconductor element relative to the substrate along at least one substantially horizontal direction using a motion system of at least one of the semiconductor element and the substrate.

Disclosed is a manufacturing method of a battery pack in which multiple battery cells are stacked, and electrodes of adjacent battery cells of the battery cells are connected by a bus bar, the bus bar having two holes that are smaller than the electrodes, and the bus bar being disposed such that the holes overlap the electrodes respectively. The manufacturing method includes welding the bus bar and one of the electrodes, then welding the bus bar and another one of the electrodes in an intermediate region between the two holes of the bus bar, and subsequently welding the bus bar and the other one of the electrodes in an end region adjacent to the intermediate region of the bus bar.