Vitesco Technologies is using innovative laser systems from TRUMPF. With the introduction of the new green laser equipment for copper welded joints, Vitesco Technologies is among the pioneers in the serial use of this new solution. Compared with infrared laser systems – the standard in copper welding to date – the use of green lasers can reduce energy consumption by up to 20 percent, depending on the application, and thus the CO2 footprint per laser welded joint.
TRUMPF has for the first time developed a green laser system of this type for industrial production, which operates in the visible light spectrum with a wavelength of 515 nm. Compared to the infrared laser welding technology with a wavelength of around 1030 nm used to date, the welding process with the green laser is more energy-efficient and controlled.
Up to now, copper has been welded using infrared laser systems (IR lasers). This process is difficult to control, however, because the amount of energy absorbed by the copper during the welding process changes abruptly after a certain point. Initially, the copper reflects almost all of the laser radiation before the weld suddenly heats up. Complex measures are required to protect electronic systems from the copper spatter that can be generated in the process. Because of the initial high reflection and low energy absorption, IR lasers require a lot of power, which makes them less sustainable compared to green lasers.
For the first time, the green laser is being used at Vitesco Technologies for the current production of sophisticated battery management electronics for the BMW Group. Already here, the energy consumption for the welding assembly could be reduced by 4 percent only by substituting the beam source.
