A typical example of use is the secure, positive-welded connection of copper, aluminum and a combination thereof, e.g. for high-voltage connections in a vehicle. Charging cables with plugs, from the charging station to the high-voltage battery, enable rapid charging even under difficult conditions. A reliable connection with low contact resistance is important here. The contacts between the individual aluminum and copper films of the pouch cells on a high-voltage battery, as well as the arresters for the external connections, are welded quickly, reliably and with high quality using ultrasonics.
A central electronic component for converters of electrical drives and battery charging systems are IGBT power semiconductors, which are capable of switching electrical currents quickly and with minimal losses. The unique torsional welding technique SONIQTWIST®, which uses slim sonotrodes that approach from above, is particularly suitable for the sensitive ceramic substrates of the IGBTs, onto which the contacts are welded on the conductor paths, especially when space is limited.