A laser welding method according to this disclosure is a laser welding method for welding first and second coils (members) to each other by applying a laser beam to the first and second coils in a state where the first and second coils are brought into contact with each other. The laser welding method includes: a first step of forming a weld pool by applying a laser beam to the first coil; and a second step of continuing the application of the laser beam to the first coil until the width of a bridge formed between the first and second coils becomes wider than the width of the laser beam, the bridge being formed such that the weld pool is attached to the second coil by growing.

A method for joining a modular hot gas component by welding and high-temperature soldering. In order to optimally join high-temperature components, a first component is plugged into pins of a second component, a soldering material is placed between the two components, and the pins of the second component are welded to the first component.

A method for joining a modular hot gas component by welding and high-temperature soldering. In order to optimally join high-temperature components, a first component is plugged into pins of a second component, a soldering material is placed between the two components, and the pins of the second component are welded to the first component.

In a battery assembly including a first battery and a second battery, the first battery includes a negative terminal, and the negative terminal has a first metal section and a second metal section formed of a metal different from the first metal section. The second metal section is joined to the top of the first metal section with the dissimilar metal joining, and the second metal section is formed with a joint surface and a recessed portion. A method of manufacturing the battery assembly includes a process of inserting a welding assist member into the recessed portion, and a process of placing a bus bar on the joint surface of the negative terminal in which the welding assist member is inserted in the recessed portion, and joining the bus bar onto the joint surface of the negative terminal by laser welding.

In a battery assembly including a first battery and a second battery, the first battery includes a negative terminal, and the negative terminal has a first metal section and a second metal section formed of a metal different from the first metal section. The second metal section is joined to the top of the first metal section with the dissimilar metal joining, and the second metal section is formed with a joint surface and a recessed portion. A method of manufacturing the battery assembly includes a process of inserting a welding assist member into the recessed portion, and a process of placing a bus bar on the joint surface of the negative terminal in which the welding assist member is inserted in the recessed portion, and joining the bus bar onto the joint surface of the negative terminal by laser welding.

A method is for producing a three-dimensional vehicle door frame inner reinforcement element (52) including an inner center pillar part (66), an inner front pillar part (68) and an inner side rail part (64) joining the inner center pillar part (66) and the inner front pillar part (68). The method includes providing an inner center pillar blank, an inner front pillar blank and an inner side rail blank, said inner blanks being substantially planar, assembling the inner center pillar blank and the inner front pillar blank to the inner side rail blank in order to form a substantially planar door frame inner reinforcement blank, and hot stamping the door frame inner reinforcement blank to shape the three-dimensional door frame inner reinforcement element (52).

A method is for producing a three-dimensional vehicle door frame inner reinforcement element (52) including an inner center pillar part (66), an inner front pillar part (68) and an inner side rail part (64) joining the inner center pillar part (66) and the inner front pillar part (68). The method includes providing an inner center pillar blank, an inner front pillar blank and an inner side rail blank, said inner blanks being substantially planar, assembling the inner center pillar blank and the inner front pillar blank to the inner side rail blank in order to form a substantially planar door frame inner reinforcement blank, and hot stamping the door frame inner reinforcement blank to shape the three-dimensional door frame inner reinforcement element (52).

A laser welding apparatus includes a laser medium, an excitation light source and a control unit. The control unit supplies drive power to the excitation light source to inject excitation energy to the laser medium. The control unit supplies preliminary excitation power, which is smaller than pulsed drive power, to the excitation light source over a preliminary supply time, which is longer than a pulse width of the drive power before welding the first weld to be welded. After the preliminary supply time elapses and then an interval, the pulsed drive power is supplied to the excitation light source to weld the first weld.

A laser welding apparatus includes a laser medium, an excitation light source and a control unit. The control unit supplies drive power to the excitation light source to inject excitation energy to the laser medium. The control unit supplies preliminary excitation power, which is smaller than pulsed drive power, to the excitation light source over a preliminary supply time, which is longer than a pulse width of the drive power before welding the first weld to be welded. After the preliminary supply time elapses and then an interval, the pulsed drive power is supplied to the excitation light source to weld the first weld.

Method and system for a laser welding process employing the use of a single pulsed fiber laser source configured to generate a radiative output with a wavelength spectrum extending from about 1.8 microns to about 2.6 microns. In a specific case, the laser output from the single pulsed fiber laser source is focused onto the interface of the two pieces of materials at least one of which includes any of glasses, inorganic crystals, and semiconductors.