Abstract: A welding device and a method for welding at least two components. The welding device includes an ultrasonic welding device and a laser welding device and is configured to weld the two components together by ultrasonic welding in a first area with the aid of the ultrasonic welding device and, during the ultrasonic welding process, to weld the two components together by laser welding in a second area which is smaller than the first area and is arranged within and/or bordering an outer periphery of the first area, with the aid of the laser welding device. The ultrasonic welding device may have an ultrasonic sonotrode and/or an anvil which have a through opening within the first area, and the laser welding device may be configured to direct the laser beam through the through opening onto the second area on the two components.