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Investigation of different laser cutting strategies for sizing of Li-ion battery electrodes

: Patwa, R.; Herfurth, H.; Heinemann, S.; Mazumder, J.; Lee, D.

Washio, Kunihiko ; Laser Institute of America -LIA-:
ICALEO 2012, 31st International Congress on Applications of Lasers & Electro-Optics. Congress proceedings. CD-ROM : September 23-27, 2012, Anaheim, CA, USA
Orlando, Fla.: LIA, 2012 (LIA publication 615)
ISBN: 978-0-912035-96-3
International Congress on Applications of Lasers & Electro Optics (ICALEO) <31, 2012, Anaheim/Calif.>
Conference Paper
Fraunhofer CLT ()

Lithium-ion batteries are currently considered to be the most promising advanced battery technology for electric vehicles that require high energy capacity. A lot of research and development activities have been focused on their development to achieve efficient mass production capabilities and to successfully commercialize the technology. This paper discusses the laser cutting process for coated anode/cathode and uncoated copper/aluminum tabs for both cylindrical and prismatic Li-ion cell designs. A number of different cutting strategies have been investigated using IR (fiber/disc) and UV laser sources in pulsed/cw configurations. An in-depth development study has been performed to understand the effect of different processing parameters on the maximum cutting speed, cut edge quality and overall energy efficiency of the process. Results show that excellent cut quality can be achieved using optimal processing parameters with cutting speeds ranging from several m/min up t o 300 m/min depending on the processing requirements and the corresponding cutting approach.