Cutting is required for all li-ion battery cells formats, as laser foils are a core component. Laser foils can be made of aluminum of copper and are coated with materials such as ceramic, graphite, NCM, LFP, etc. Regardless of the material composition of the foils, fiber lasers can cut the foils using different processes: notching, cross-cutting, trimming and slitting.
The biggest advantage of fiber lasers, and more specifically IPG’s single mode pulsed cutting lasers, is that these lasers have higher power, which not only makes the cutting process faster, but gives better quality and finish to the foils.
Additionally, fiber laser meets other requirements that are usually needed when cutting foils, namely process reliability and repeatability, which translates into a higher yield.
Conventional (gas burning) drying of coated copper & aluminum foils used as electrodes is the most energy and cost-intensive process step in electrode manufacturing.
In contrast, IPG's diode laser drying solution not only reduces drying times and foil defects, but provides reduced energy consumption through > 50% efficiency. One additional advantage is that the drying equipment is much smaller and thanks to IPG's long-lived diode, cost of ownership is reduced as well.
Thanks to its high efficiency, diode laser drying is the best return on investment for battery foils manufacturing.
Whether the battery cells format is cylindrical, prismatic or pouch, all cells require multiple welds, mainly lap welds (over 70% of the weld total), butt/edge welds and multi-foil welds. Regardless of the cell format or weld type, IPG’s fiber lasers provide the answer to the main welding requirements for battery cell manufacturing, such as hermetic joints, constant penetration depth, high welding seam and controlled heat input.
Through the use of IPG’s AMB lasers and LDD-700 system, it is also possible to obtain a spatter-free weld and have real-time measurement, and rework, of weld defects caused by material parts inconsistency.
Whether you need to demonstrate laser processing feasibility with your parts, or just want to bounce design and implementation ideas about your e-mobility manufacturing processes off an experienced laser engineer, give us a call.
IPG is the world leader of fiber laser technology and experts in materials processing. We apply this expertise to our e-mobility solutions, with the sole purpose of offering manufacturers the necessary tools through laser processing to obtain the best e-mobility application results.
Learn more about the entire scope of E-Mobility solutions that IPG offers here.