Cutting Steel Lithium Battery

How does laser cutting a lithium metal foil work?

Separating lithium metal foil into individual anodes is a critical process step in all-solid-state battery production. With the use of nanosecond-pulsed laser cutting, a characteristic quality-decisive cut edge geometry is formed depending on the chosen parameter set.

How to cut a lithium sheet using a laser?

The lithium sheets were placed on a flat sanded steel plate in focus level of the laser. In the cutting area the steel plate is grooved to avoid a reaction with respectively welding on the steel plate. For the cutting experiments lithium metal foils (Rockwood Lithium) with a thickness of 50 μm were applied.

What is laser cutting in lithium ion battery production?

2.2. Laser cutting in lithium ion battery production Remote Laser cutting of conventional lithium-ion battery foil (NMC, NCA, LFP cathodes or graphite anodes) is a method widely discussed in the scientific landscape for separation of electrodes [Lee et al., 2013],[Luetke et al., 2011 // 2014],[Reincke et al., 2015].

Can lithium metal foils be separated by a die cutting process?

Apart from the current low stability of all solid-state separators, challenges lie in the general processing, as well as the handling and separation, of lithium metal foils. Unfortunately, lithium metal anodes cannot be separated by conventional die cutting processes in large quantities.

How fast can a laser cut a lithium metal substrate?

Moreover, it was recently demonstrated that laser pulses in the nanosecond range enable the separation of lithium metal substrates at exceptional cutting speeds of more than 5 m s −1 ( Kriegler ., 2022 ).

How fast does a laser cut lithium sheet cut?

Light microscope sections of a laser cut lithium sheet: 72.8 W, 490 kHz, 240 ns; (a) 75 mm/s, PO 99.83%; (b) 100 mm/s, PO 99.77%; (c) 150 mm/s, PO 99.66%. formation width at the cutting edge. The analysis of the images shows a reciprocal dependence of the melt formation width on the cutting speed.