Charging station with control device and method for charging electric vehicles

A method for charging electric vehicles by a charging station, the charging station comprising:

• a network connection point for exchanging electrical power with an electrical supply network;
• at least one charging terminal, in each case for charging an electric vehicle;
• and
• a control device for controlling the charging station, wherein the method comprises:
• determining an equivalent storage capacity;
• and
• transmitting the equivalent storage capacity to a receiver outside the charging station,
• wherein the equivalent storage capacity describes a value which corresponds to a storage capacity of an equivalent electrical storage device configured to absorb and emit as much energy as the charging station configured to absorb and emit by changing its absorbed or emitted power for a predetermined support period,
• wherein the equivalent storage capacity specifies a storage capacity of a virtual precharged storage device and provides the receiver with information for planning a power or energy distribution.

A method for charging electric vehicles by a charging station, the charging station comprising:

• a network connection point for exchanging electrical power with an electrical supply network;
• at least one charging terminal, in each case for charging an electric vehicle;
• and
• a control device for controlling the charging station,
• wherein the method comprises:
• determining an equivalent storage capacity;
• transmitting the equivalent storage capacity to a receiver outside the charging station,
• wherein the equivalent storage capacity describes a value which corresponds to a storage capacity of an equivalent electrical storage device configured to absorb or emit as much energy as the charging station configured to absorb or emit by changing its absorbed or emitted power for a predetermined support period,
• receiving a specification of a predetermined equivalent storage capacity from a network operator, and
• controlling the charging station in such a way that the predetermined equivalent storage capacity is reached, or outputting information regarding which equivalent storage capacity can be provided in the event the predetermined equivalent storage capacity cannot be reached,
• wherein taking a period of a momentary reserve, primary control, positive or negative minute reserve or secondary control as a basis for a predetermined support period,
• wherein depending on the predetermined support period, a support power is provided to the electrical supply network, wherein the support power is one of a momentary reserve, primary control, positive or negative minute reserve or a secondary control,
• wherein a charging power curve, which is known, expected, or forecasted, is taken as a basis for determining the equivalent storage capacity,
• wherein an emergency storage capacity is determined, wherein the emergency storage capacity specifies a maximum equivalent storage capacity which relates to the equivalent storage capacity, wherein the equivalent storage capacity arises when a minimum charging power is also taken into account as the charging power, which is to be taken into account when a reduction of the charging power to zero is also taken into account for determining the equivalent storage capacity, or even a reduction to a negative value, in a case in which power is withdrawn from the electric vehicle, and
• wherein depending on the equivalent storage capacity, the control device is configured to:
• charge the electric vehicle, in each case at least one charge set value or an available charging power is specified to the relevant charging terminals,
• store or withdraw electrical power of at least one electrical storage device,
• exchange electrical power via the network connection point, and/or
• drive at least one controllable consumer.