Contacting of 18650 lithium-ion batteries and copper bus bars using pulsed green laser radiation

Michael K. Kick, Jan Bernd Habedank, Johannes Heilmeier, Michael F. Zaeh

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations


Lithium-ion cell based battery storages are indispensable in many fields of application such as electromobility and stationary energy storage devices. Cylindrical 18650 cells are regularly utilized and connected by cell connectors made of nickel plated steel. Since this setup suffers from high electrical losses and a poor heat removal during operation, copper connectors are demanded more often. For joining the cells and the connectors, laser beam welding offers great potential due to its low energy input and high flexibility. However, challenges arise, as copper materials show a strong reflectivity for infrared wavelengths. Experimental investigations for the contacting of 18650 cells and copper connectors using a spike pulse welding strategy combined with green laser radiation are presented within this study.

Original languageEnglish
Pages (from-to)577-581
Number of pages5
JournalProcedia CIRP
StatePublished - 2020
Event11th CIRP Conference on Photonic Technologies, LANE 2020 - Virtual, Online
Duration: 7 Sep 202010 Sep 2020


  • Battery contacting
  • Copper
  • Green laser radiation
  • Hilumin
  • Pulsed laser welding


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