The increasingly compact housings and the higher performance required for electronic components are also increasing the requirements for the joining technology used with copper components. Pulsed green lasers weld these materials with a high level of reproducibility and with almost no spatter - regardless of the surface properties.

Lasers are ideally suited to sensitive battery cells as they complete their task without any contact and require little energy. The material is not mechanically stressed. The locally limited, low heat input ensures high-precision distortion-free seams.

Using TRUMPF lasers, customers can weld battery housings and cell connectors made from copper and aluminium effortlessly and with precise seams. In this manner, increasingly small and powerful cells can be integrated into a battery array. A comprehensive system of sensors monitors the quality of the weld seams and ensures precise welding depths here.

Short pulse lasers are used in hairpin welding to remove the layer of insulating varnish without damaging the underlying copper. Thanks to the high level of reproducibility of laser welding processes, users achieve consistently high-tensile connections with a good level of conductivity - and this in high quantities for series production!