Comparison Between Copper-Aluminium Laser Joining using Short Pulses and Continuous Wave Mode

Conference: PCIM Europe digital days 2021 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/03/2021 - 05/07/2021 at Online

Proceedings: PCIM Europe digital days 2021

Pages: 8Language: englishTyp: PDF

Authors:
Haddad, Elie; Helm, Johanna; Olowinsky, Alexander (Fraunhofer-Institute for Laser Technology, Germany)
Katz, Ole (Chair for Laser Technology of the RWTH Aachen University, Germany)

Abstract:
Copper-aluminium bonds are often encountered in the battery and power electronics sectors due to their good thermal and electrical conductivity. The joining process however still poses a challenge. High-brilliance fiber lasers emitting in the infrared range are well-suited tools for such a process. These are usually employed in continuous wave (cw) mode. Recent findings prove, contrary to the convention, that a nanosecond (ns) pulsed fiber laser can be used for welding applications as well. The aim of this paper is to evaluate the welding process with a ns laser and compare the results to those achieved with a cw laser.