Enhancing laser-based contacting of aluminum current collector foils for the production of lithium-ion batteries using a nanosecond pulsed fiber laser

Sophie Grabmann, Lukas Mayr, Michael K. Kick, Michael F. Zaeh

Research output: Contribution to journalConference articlepeer-review

9 Scopus citations

Abstract

Cost reduction is a major aim for innovations in lithium-ion battery production. A promising approach to meet the high economic requirements is using high-speed manufacturing technologies like laser beam welding. This process can be applied to electrically connect the pre-stacked electrode sheets at the uncoated part of the current collectors. However, laser beam welding of the aluminum current collector foils is particularly challenging due to emerging seam defects such as cracks. In order to eliminate cracks occurring between the seam and the base material, this paper presents investigations on joining aluminum foil stacks using a nanosecond pulsed laser. Forty aluminum foils were welded with an arrester tab in a lap joint. This work examined the influence of several process parameters on the seam characteristics. A detachment of the seam from the foils was prevented, and promising results regarding the mechanical and electrical seam properties were achieved.

Original languageEnglish
Pages (from-to)778-783
Number of pages6
JournalProcedia CIRP
Volume111
DOIs
StatePublished - 2022
Event12th CIRP Conference on Photonic Technologies, LANE 2022 - Erlangen, Germany
Duration: 4 Sep 20228 Sep 2022

Keywords

  • battery cell production
  • cell assembly
  • cell internal joining technologies
  • laser beam micro welding
  • nanosecond pulsed fiber laser
  • thin foils

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