Abstract: The invention relates to an electric machine, comprising a first rotor (1), a second rotor (2), and a common stator (3), wherein the rotors (1, 2) are disposed axially to each other and are set up for different rotary speeds and/or direction of rotation.

Abstract: A primary-side charging device (10) is disclosed for charging a battery (11) for a vehicle (12) having an electric drive (37). The primary-side charging device (10) comprises at least one primary coil (13) and a primary-side charging module (14) in which the primary coil (13) is arranged. The primary-side charging module (14) has at least three side surfaces (15) and each of the side surfaces (15) encloses an angle of greater than 0° and not more than 90° with a base area of the primary-side charging module (14). In addition, the at least one primary coil (13) is connected to a power supply unit (16). Furthermore, a secondary-side charging device (19) for charging a battery (11) for a vehicle (12) having an electric drive (37), a charging system (24) and a method of charging a battery (11) for a vehicle (12) having an electric drive (37) are disclosed.