Charging station for charging electric vehicles with distributed energy measurement and method

1. A charging station for charging electric vehicles, the charging station comprising:

at least two charging points, wherein each charging point is configured to be connected to an electric vehicle for charging an electrical energy store of the electric vehicle;

at least two rectifier branches, wherein each rectifier branch is configured to provide electrical energy, wherein the at least two rectifier branches are configured to be electrically connected to the at least two charging points and an electrical connection is configured to be changed over between at least one of the rectifier branches and the at least two charging points;

at least one energy meter configured to provide meter values which describe the electrical energy provided with the rectifier branches; and

at least one measured value capture computer configured to determine, for each charging point of the at least two charging points, an amount of energy of the electrical energy provided with the rectifier branches electrically connected to the respective charging point based on the meter values from the at least one energy meter,

wherein the at least one measured value capture computer is configured to capture a changeover of the electrical connection between a rectifier branch and the at least two charging points, and

wherein the at least one measured value capture computer is configured to capture instantaneous meter values from the at least one energy meter each time the rectifier branch is changed over and to assign differences between the meter values to a vehicle identification of the electric vehicle.

2. The charging station of claim 1 , wherein the at least one measured value capture computer is configured to determine the vehicle identification of the electric vehicle during the charging of the electrical energy store of the electric vehicle and to determine the amount of energy provided at the respective charging point during the charging of the electrical energy store.

3. The charging station of claim 1 , further comprising:

a charging procedure control unit for determining an electrical power required at the at least two charging points and for controlling the connection between the at least two rectifier branches and the at least two charging points based on the required power.

4. The charging station of claim 3 , further comprising:

an energy meter for each rectifier branch of the at least two rectifier branches,

wherein the meter values provided with the respective energy meters describe the electrical energy from the energy meter assigned to the rectifier branch.

5. The charging station of claim 3 , further comprising:

a measuring transducer for each rectifier branch of the at least two rectifier branches for providing a measured value which describes the electrical energy,

wherein an energy meter is assigned to each charging point of the at least two charging points,

wherein the measuring transducers are connected to the energy meters based on the connection of the rectifier branches to the at least two charging points, and

wherein the respective energy meters are configured to determine the meter values based on the measured values.

6. The charging station of claim 1 , further comprising:

an energy meter for each rectifier branch of the at least two rectifier branches,

wherein the meter values provided with the respective energy meters describe the electrical energy from the energy meter assigned to the rectifier branch.

7. The charging station of claim 6 , wherein the at least one measured value capture computer comprises a measured value capture computer for each charging point of the at least two charging points,

wherein the measured value capture computers are connected to the respective energy meters via a data bus, and

wherein the charging station has a plurality of switching devices for switching the electrical connection between the respective rectifier branches and the at least two charging points and for switching a connection of the data bus.

8. The charging station of claim 6 , wherein the at least one measured value capture computer is connected to the respective energy meters for transmitting data,

wherein the charging station has a plurality of switching devices for switching the electrical connection between the respective rectifier branches and the at least two charging points, and

wherein the at least one measured value capture computer is configured to capture a respective position of the switching devices.

9. The charging station of claim 8 , wherein the at least one measured value capture computer has an analog interface via which the at least one measured value capture computer is connected to the respective energy meters, and

wherein the at least one measured value capture computer has a summing element for summing the meter values.

10. The charging station of claim 1 , further comprising:

a measuring transducer for each rectifier branch of the at least two rectifier branches for providing a measured value which describes the electrical energy,

wherein an energy meter is assigned to each charging point of the at least two charging points,

wherein the measuring transducers are connected to the energy meters based on the connection of the rectifier branches to the at least two charging points, and

wherein the respective energy meters are configured to determine the meter values based on the measured values.

11. The charging station of claim 1 , wherein the at least one energy meter is configured to capture an electrical voltage and/or an electrical current supplied to a rectifier branch of the at least two rectifier branches.

12. The charging station of claim 1 , wherein the at least one energy meter is configured to capture an electrical voltage and/or an electrical current output by the at least two rectifier branches.

13. The charging station of claim 2 , further comprising:

a charging procedure control unit for determining an electrical power required at the at least two charging points and for controlling the connection between the at least two rectifier branches and the at least two charging points based on the required power.

14. The charging station of claim 13 , further comprising:

an energy meter for each rectifier branch of the at least two rectifier branches,

wherein the meter values provided with the respective energy meters describe the electrical energy from the energy meter assigned to the rectifier branch.

15. The charging station of claim 13 , further comprising:

a measuring transducer for each rectifier branch of the at least two rectifier branches for providing a measured value which describes the electrical energy,

wherein an energy meter is assigned to each charging point of the at least two charging points,

wherein the measuring transducers are connected to the energy meters based on the connection of the rectifier branches to the at least two charging points, and

wherein the respective energy meters are configured to determine the meter values based on the measured values.

16. A method for operating a charging station for charging electric vehicles, the method comprising:

connecting an electric vehicle to a charging point of at least two charging points for charging an electrical energy store of the electric vehicle;

providing electrical energy with at least two rectifier branches, wherein the at least two rectifier branches are configured to be electrically connected to the at least two charging points and an electrical connection is configured to be changed over between at least one rectifier branch of the at least two rectifier branches and the at least two charging points;

providing meter values using at least one energy meter, wherein the meter values describe the electrical energy provided with the at least two rectifier branches; and

determining, for each charging point of the at least two charging points, an amount of energy of the electrical energy provided with the rectifier branches electrically connected to the respective charging point based on the meter values from the at least one energy meter using at least one measured value capture computer;

capturing a changeover of the connection between the at least one rectifier branch and the at least two charging points using the at least one measured value capture computer;

capturing instantaneous meter values from the at least one energy meter using the at least one measured value capture computer each time the at least one rectifier branch is changed over; and

assigning differences between the meter values to a vehicle identification of the electric vehicle.