The present disclosure provides a battery, a manufacturing method thereof and an electronic product. The battery cell includes electrodes and tabs, where each of the electrodes includes a current collector and an active material layer, and the current collector includes a coating zone coated with the active material layer and an empty foil zone, and an end of a tab overlaps the empty foil zone and the tab and the empty foil zone are connected by laser welding; the side of the empty foil zone facing away from the tab has a plurality of dot-shaped welding marks arranged at intervals, and the dot-shaped welding marks include a concave part and an annular convex part surrounding the concave part. The contact area between the annular convex part and the separator between the positive electrode and the negative electrode is large, and the separator is less likely to be pierced.

One aspect relates to a 3D connector structure for electrically connecting at least one flat electrode to at least one connection wire. The 3D connector structure has at least two connectors which are spatially separate from one another. The connectors in each case have an electrically conductive material, a first side and a second side. The second side of each connector is connected to an electrical connection element. A spacing of at least 100 μm is constructed between the first side and the second side of each connector.

The present disclosure relates to components, such as base bodies, for feed-through elements including a metallic base body, at least one through-opening for receiving a functional element in a fixing material, such as an electrically insulating fixing material, and at least one conductor, which is connected electrically conductively to the base body by a soldered connection. The soldered connection includes a metallic solder material that covers a surface region of the base body and thus forms a soldering region on a surface of the base body. The base body has, at least in the soldering region, a microstructuring that includes at least depressions in the surface of the base body. The present disclosure similarly relates to methods for producing such base bodies and to applications thereof.

A device and associated method for joining, via a laser welder, a first workpiece to a second workpiece is described. This includes arranging the first and second workpieces in a stack, including overlapping a portion of the first workpiece with a portion of the second workpiece. The laser welder generates a first laser beam and coincidentally controls the laser welder to traverse a desired weld path that is disposed on the top surface of the first workpiece. The laser devices generates a second laser beam and coincidentally controls the laser welder to traverse the desired weld path. Generating, via the laser welder, the first laser beam includes operating the laser welder at a pulsed operation and at a first power level. Generating, via the laser welder, the second laser beam includes operating the laser welder at a continuous operation and at a second power level.

A welding apparatus that welds a third conductor to a first conductor includes a clamp and a laser irradiation apparatus, the third conductor being adjacent to the first conductor between the first conductor and a second conductor extending in parallel to each other. The clamp is configured to sandwich the first conductor and the third conductor between a first gripper and a second gripper. The laser irradiation apparatus is configured to emit a welding laser towards the third conductor. The first gripper includes a confronting portion facing a contact surface that comes into contact with the first conductor. In a state where the clamp sandwiches the first conductor and the third conductor, the confronting portion and the second gripper are positioned so as to block a reflection laser of the welding laser reflected in a given range of the third conductor.

A method for welding copper-including members includes laser-welding a first member that includes copper, and a second member that includes copper and is located adjacent to the first member. A welding surface of the first member and a welding surface of the second member are melted by moving an irradiation position of a laser to turn in a spiral shape while approaching a center of the spiral when irradiating the laser on the welding surface of the first member and the welding surface of the second member.

A welding method includes providing a first connector having a first end, providing a second connector having a second end for being welded to the first end, overlapping the first end and the second end, applying a contactless heating to a central section of the first end and melting an end section of the first end facing the second connector, and cooling the first end and the second end to form a weld connecting the first connector and the second connector. The first connector and the second connector extend in opposite directions from the weld.

Methods for producing a cohesive laser bond connection, wherein, in a first method step, a bond element (2) made from copper is provided, in a second method step, a contact element (3) made from copper is provided, and, in a third method step, the bond element (2) and the contact element (3) are connected to one another in a joined fashion under the action of green laser radiation (1).

An ultrasonic welding apparatus (50) includes a sonotrode (8) with a working surface (10), an anvil (4) with a working surface (11), which lies opposite the working surface (10) of the sonotrode (8), and two side delimiters (5, 6) with respective side delimiting surfaces (12, 13). The working surfaces (10, 11) and the side delimiting surfaces (12, 13) delimit a compression chamber (9) for placing an elongated welding material (60) in a welding material direction (B). The ultrasonic welding apparatus (50) has a clamping device (14), by which the anvil (4) is clamped at least in a welding position (S) by a clamping force, which acts on at least part of a side (15) of the engaging surface (26) of the anvil (4) that lies opposite the working surface (11) of the anvil (4), in the direction of the sonotrode (8). A method for ultrasonic welding is also disclosed.

An ultrasonic tool comprising a first end face and a second end face, which is opposite the first end face, as well as a tool cover surface connecting the first end face and the second end face, wherein the ultrasonic tool is elongated in a longitudinal direction of the tool, wherein at least the first end face is formed as a connecting contact surface, which is arranged for pressing the ultrasonic tool against a connecting component, and wherein the ultrasonic tool comprises an end region comprising the connecting contact surface, which extends from the connecting contact surface in the longitudinal direction of the tool over 15 mm, but at most extends one third of the length of the ultrasonic tool in the direction of the opposite end face, and wherein in the end region, a first partial surface of the tool cover surface is formed as a surface-structured absorption surface.