Advanced remote laser cutting of battery foils using an interference approach

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Robert Baumann - , Professur für Laserbasierte Fertigung (Autor:in)
  • Sabri Alamri - , Fraunhofer-Institut für Werkstoff- und Strahltechnik, Fusion Bionic GmbH (Autor:in)
  • Alfredo Aguilar-Morales - , Fraunhofer-Institut für Werkstoff- und Strahltechnik (Autor:in)
  • Andres F. Lasagni - , Professur für Laserbasierte Fertigung, Fraunhofer-Institut für Werkstoff- und Strahltechnik (Autor:in)
  • Tim Kunze - , Fraunhofer-Institut für Werkstoff- und Strahltechnik, Fusion Bionic GmbH (Autor:in)

Abstract

This work demonstrates how an interference pattern can improve the performance of remote laser cutting of pure copper foils, making the cutting process effective even for a low power laser source. The proof of concept is carried out by using a nanosecond laser source with a pulse duration of 5 ns, coupled with a two-beam scanning interference setup, producing a spatial period of 12.5 µm. In the experiments, processing parameters as pulse-to-pulse distance, laser power and scanning speed are varied, to optimize the foil breakthrough and their effect on the generated material modifications are investigated. A comparison between the processing results employing the interference pattern and single beam with a Gaussian energy distribution is carried out. While the single beam process is not sufficient for cutting a 10 µm thin metallic foil, the interference treatment shows an improvement over 100%. In addition, only small spatter formations are detected, with average particle sizes of 1.75 ± 0.82 µm on the top side of the foil. The bottom side of a fully separated copper foil only depicts small spatter formations of less than 1 µm.

Details

OriginalspracheEnglisch
Aufsatznummer100138
Seitenumfang4
FachzeitschriftMaterials Letters: X
Jahrgang14
Frühes Online-Datum5 Apr. 2022
PublikationsstatusVeröffentlicht - Juni 2022
Peer-Review-StatusJa

Externe IDs

Scopus 85127685718

Schlagworte

Schlagwörter

  • Copper foils, Cutting, Direct laser interference patterning, Surface treatment