DEVICE AND METHOD FOR DETECTING THE ENERGY QUANTITY IN THE CHARGING STATION FOR AN ELECTRIC VEHICLE

1 . A method for determining a delivered energy quantity during the charging of electric vehicles, comprising:

connecting an electric vehicle to a charging station for obtaining electrical energy provided on a charging cable;

feeding the desired energy quantity into a battery of the electric vehicle during a desired charging period;

detecting of at least one electrical value required for the calculation of the energy quantity by an energy quantity meter;

output of the calculated energy quantity; and

output of the at least one electrical value, required by the energy quantity meter for the calculation of the energy quantity, to a monitoring device for the operational monitoring of the charging station.

2 . The method according to claim 1 , wherein the output of the at least one electrical value, required for the calculation of the energy quantity, to a monitoring device takes place for conduction current monitoring of the charging station.

3 . A device for determining a delivered electrical energy quantity when charging electric vehicles in a charging station, comprising:

a detection means for detecting the electrical values applied in the charging circuit of an energy supply network, particularly the electric voltage and the electric current;

a calculation means for calculating the energy quantity from at least one of the detected electrical values;

a first output unit for the calculated energy quantity; and

a further output unit for the output of at least one further electrical value to a monitoring device for operational monitoring of the charging station.

4 . The device according to claim 3 , wherein the at least one electrical value required for the calculation of the energy quantity is the phase current.

5 . The device according to claim 3 , wherein the at least one electrical value required for the calculation of the energy quantity is the phase voltage.

6 . The device according to claim 3 , wherein the at least one electrical value required for the calculation of the energy quantity is the real power assigned to the respective phase.

7 . The device according to claim 3 , wherein the monitoring device contains a protection device, particularly for safeguarding the phase current.

8 . The device according to claim 3 , wherein the further output unit is constructed to output the at least one further electrical value to the monitoring device via a data interface.

9 . The device according to claim 8 , wherein the data interface is constructed together with an interface unit for the first output means for the calculated energy quantity.