Provided are a machining device and a machining method in which machining of higher precision can be performed with a simple configuration. The machining device has an irradiation head (16) and a controller; and the irradiation head (16) can be divided into a collimate optical system, a laser revolving unit (35), and a light collection optical system (37). The laser revolving unit (35) has a first prism (51), a second prism (52), a first rotation mechanism (53), and a second rotation mechanism (54). The controller controls the rotational speeds and the difference in phase angles of the first prism (51) and the second prism (52), on the basis of at least the relationship between a heat affected layer of a member to be machined and the revolving speed of the laser.

A sensor device includes a body case provided with an opening, and a body cover assembled to the body case to cover the opening. The body cover has at an outer peripheral portion thereof an overlapping region overlapping a portion of the body case located at a peripheral edge of the opening. The body cover is fixed to the body case by providing a welded portion surrounding the opening using laser-welding at a portion distant from an end surface of the body cover in a boundary of the overlapping region of the body cover and a portion of the body case overlapping the overlapping region.

A sensor device includes a body case provided with an opening, and a body cover assembled to the body case to cover the opening. The body cover has at an outer peripheral portion thereof an overlapping region overlapping a portion of the body case located at a peripheral edge of the opening. The body cover is fixed to the body case by providing a welded portion surrounding the opening using laser-welding at a portion distant from an end surface of the body cover in a boundary of the overlapping region of the body cover and a portion of the body case overlapping the overlapping region.

A system for machining materials by means of laser beam includes a deflection device for deflecting the laser beam and a wobble device configured to superimpose a wobble movement of the laser beam with a wobble figure and a wobble frequency onto a feed movement of the laser beam corresponding to a machining path by controlling the deflection device. The wobble device is configured, for carrying out the wobble movement, to control the deflection device according to a compensated wobble movement. Control values for a deflection of the laser beam along the wobble figure are adapted as a function of the wobble frequency and/or a path speed of the wobble movement that varies along the wobble figure is adapted as a function of a position of the laser beam in the wobble figure and as a function of the wobble frequency.

A visible light laser system and operation for welding materials together. A blue laser system that forms essentially perfect welds for copper based materials. A blue laser system and operation for welding conductive elements, and in particular thin conductive elements, together for use in energy storage devices, such as battery packs.

A visible light laser system and operation for welding materials together. A blue laser system that forms essentially perfect welds for copper based materials. A blue laser system and operation for welding conductive elements, and in particular thin conductive elements, together for use in energy storage devices, such as battery packs.

An optical wheel assembly for a laser transmission welding apparatus includes a double-convex optical lens having two spherical surfaces that are joined by a polished side surface extending circumferentially around the lens. Each of the two spherical surfaces has a known spherical diameter. The optical lens is disposed between a pair of dish cup holders, each having a spherical concave surface with the known spherical diameter and engaging the spherical surfaces of the lens. Each dish cup holder has an axial projection extending away from a side of the dish cup holder that is opposite the spherical concave surface. The axial projections are received within respective bearings that are mounted within a housing. The bearings allow the dish cup holders and the optical lens to rotate while pressure is being applied to plastic workpieces during laser transmission welding thereof.

The present disclosure provides a battery and a portable electrical device. The battery includes a housing and a battery cell disposed in the housing; the battery cell includes electrodes and tabs, where the electrode includes a current collector and an active material layer, and the current collector includes a coating zone coated and an empty foil zone, and an end of the tab is welded to the empty foil zone by a laser welding process; a surface of the empty foil zone facing away from the tab has a plurality of welding zones arranged at intervals, and each welding zone comprises at least one line-shaped welding mark and a surface of the tab facing away from the empty foil zone has no welding mark. The protrusion of the present disclosure is less likely to pierce a separator between a positive electrode and a negative electrode.

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.

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.