Charging station, motor vehicle and method for inductive charging of a battery of a motor vehicle

A charging station for the inductive charging of a battery of a motor vehicle, comprising:

• a primary resonant circuit for generating an electrical oscillation, wherein the primary resonant circuit has a primary capacitor and a primary coil, wherein the charging station includes a measuring device designed to:
• excite the primary resonant circuit up to a predefinable voltage amplitude;
• then to interrupt the excitation of the primary resonant circuit;
• and
• to evaluate the time function of the voltage amplitude of the primary resonant circuit after the interruption of the excitation of the primary resonant circuit.

A method for inductive charging of a battery of a motor vehicle by a charging station, having a primary resonant circuit with a primary capacitor and a primary coil for generating an electrical oscillation, wherein the motor vehicle has a secondary resonant circuit with a secondary capacitor and a secondary coil, wherein a rectifier is connected between the secondary resonant circuit and the battery of the motor vehicle, comprising:

• a) excite the primary resonant circuit up to a predefinable voltage amplitude;
• b) interrupt the excitation of the primary resonant circuit;
• and
• c) evaluate the time function of a decaying voltage amplitude after the interruption of the excitation of the primary resonant circuit.