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Prospects of welding foils with solid state laser for lithium-ion batteries

: Schedewy, R.; Beyer, E.; Brenner, B.; Standfuß, J.

Washio, Kunihiko ; Laser Institute of America -LIA-:
ICALEO, 30th International Congress on Applications of Lasers & Electro-Optics. Congress proceedings. CD-ROM : October 23 - 27, 2011, Orlando, FL, USA, Hilton in the Walt Disney World Resort
Orlando, Fla.: LIA, 2011 (LIA 614)
ISBN: 978-0-912035-94-9
International Congress on Applications of Lasers & Electro Optics (ICALEO) <30, 2011, Orlando/Fla.>
Fraunhofer IWS ()

Lithium-ion batteries will become a key element in future electro mobility. In a layered pouch cell design the electrical contacts consist of conductive foil tapes that have to be welded to the terminal. Common used ultra-sonic welding technologies have some processinherent restrictions like risk for mechanical damaging of the 10. . . 20 ?m thin Al or Cu foils, wear of the welding-sonotrode and limited mechanical strength and electrical conductivity of the welding spot caused by the adhesive bonding interfaces.