In particular, a temperature of 30° C. to 65° C. is selected as the target display device temperature.

According to a further development of the invention, it is provided that a plurality of display device temperature sensors are each used to determine a display device area temperature—in particular assigned to a common point in time-, wherein the display device temperature is determined on the basis of the plurality of display device area temperatures. Advantageously, this makes it possible to determine the display device temperature accurately and reliably.

In one embodiment, the display device temperature is determined by means of a plurality of display device temperature sensors.

In one embodiment, a display device area temperature assigned to a spatial area of the display device is determined by means of the plurality of display device temperature sensors, wherein the display device temperature corresponds to a maximum or an average value of the plurality of display device area temperatures.

According to a further development of the invention, it is provided that the first operating state is set when the charging station temperature state is in the overload state, the display device operating mode is in the priority operation and the display device temperature is greater than a maximum display device temperature. Alternatively or additionally, the first operating state is set when the charging station temperature state is in the overload state and the display device operating mode is in the normal operation state, in particular regardless of the display device temperature. Alternatively or additionally, the second operating state is set when the charging station temperature state is in the normal state and the charging station internal temperature is at least equal to a at least display device ambient temperature. Alternatively or additionally, the third operating state is set when the charging station temperature state is in the normal state and the charging station internal temperature corresponds at most to a minimum display device ambient temperature.

Preferably, the maximum display device temperature is from 40° C. to 70° C. Alternatively or additionally, the at least display device ambient temperature is from 5° C. to 15° C. Alternatively or additionally, the minimum display device ambient temperature is from −5° C. to 5° C.

In one embodiment, the at least display device ambient temperature is equal to the minimum display device ambient temperature.

In an alternative embodiment, the at least display device ambient temperature is greater than the minimum display device ambient temperature. Advantageously, a hysteresis is thus configured between switching off the display device and switching it on again, so that small fluctuations in the charging station internal temperature have no influence on the operating state of the display device.

In one embodiment, at least one temperature, selected from a group consisting of the maximum display device temperature, the at least display device ambient temperature, the minimum display device ambient temperature, and a combination of at least two of the preceding temperatures, is predetermined by the operator of the charging station. It is possible for the operator of the charging station to set and/or change the at least one temperature selected from the above group directly at the charging station, by remote maintenance, by radio transmission, and/or by wired data transmission. Furthermore, a default value can be preset for the at least one temperature selected from the above group, which the operator can overwrite if necessary.

According to a further development of the invention, it is provided that the operating state of the display device is set repeatedly.

Preferably, the operating state of the display device is set with a predetermined time interval or with a frequency of 1 Hz to 10 Hz, particularly preferred 5 Hz. Each time the operating state is set, the display device is set to the last operating state set, which includes that it remains in its previous operating state if this does not differ from the last operating state set.

The task is also solved by providing a control device which is adapted to performing a method according to the invention or a method according to one or more of the previously described embodiments. In particular, the advantages already explained in connection with the method arise in connection with the control device.

Preferably, a communication connection is configured between the display device, the charging station and the control device, wherein the control device is controllably operatively connectable, particularly preferred controllably operatively connected, to the charging station and the display device in order to performing a method according to the invention or a method according to one or more of the previously described embodiments.

The task is also solved by providing a charging station comprising a display device comprising a backlight and a control device according to the invention or a control device according to one of the previously described embodiments. In particular, the advantages already explained in connection with the method and the control device arise in connection with the charging station.

In electrical engineering, a charging station is any device or electrical system, in particular stationary or mobile, which is used to supply energy to mobile battery-powered devices, machines or motor vehicles by simply setting or plugging them in, without necessarily having to remove the energy storage device—such as the traction battery of an electric car. Charging stations for electric cars are sometimes also referred to as “current charging stations” and can include several charging points. High performance charging systems (HPC systems) such as the combined charging system (CCS), which is widespread in Europe, are known in particular. With generic direct current charging, direct current from the charging station is fed directly into the vehicle's battery and supplied by a powerful rectifier, preferably from the charging station, from the power grid or from large buffer accumulators at solar charging stations, for example. There is a battery management system in the vehicle that communicates directly or indirectly with the charging station in order to adjust the current and voltage or to terminate the process when a predetermined capacity limit is reached. Power electronics are usually located in the charging station. As the direct current connections of the charging station are connected directly-without going through an AC/DC converter in the vehicle—to the corresponding connections of the traction battery, high charging currents can be transmitted with low losses, which enables short charging times.

In one embodiment, the charging station is configured as a charging pillar. In particular, the charging station comprises at least one charging point, in particular exactly one charging point or exactly two charging points. In particular, a charging point comprises a charging cable, a charging plug, a charging plug holding device and an electricity meter that complies with calibration law.

In particular, the charging station is configured as a fast charging station. In one embodiment, the charging station is configured as a battery-supported charging station, in particular as a battery-supported fast charging station.

According to a further development of the invention, it is provided that the display device additionally comprises a fan. Advantageously, the display device can thus be cooled not only passively—by switching the backlight on and off and switching the display device off—but also actively by generating an air flow.

The invention is explained in more detail below with reference to the drawing. Thereby shows:

FIG. 1 a schematic representation of an embodiment example of a charging station, and

FIG. 2 a flowchart of an embodiment example of a method for operating a display device of the charging station.

FIG. 1 shows a schematic representation of an embodiment example of a charging station 1 with a display device 3 and a control device 5.

The display device 3 comprises a backlight 7. In addition, at least one fan 9 is preferably associated with the display device 3.

Furthermore, the charging station 1 optionally comprises at least one display device temperature sensor 11, preferably a plurality of display device temperature sensors 11. Alternatively or additionally, the charging station 1 comprises at least one charging station temperature sensor 13, preferably a plurality of charging station temperature sensors 13. In particular, the charging station 1 additionally comprises a climate conditioning device 15. The climate conditioning device 15 preferably comprises a refrigerating machine with a refrigerant circuit and is adapted to cool an air flow and/or a coolant circuit. In particular, a battery of the charging station 1 is cooled by means of the air flow, while power electronics of the charging station 1 are cooled by means of the coolant circuit.

The at least one display device temperature sensor 11, in particular the plurality of display device temperature sensors 11, is adapted to determine a display device area temperature

t
AV
B

associated with a spatial area of the display device 3.

The at least one charging station temperature sensor 13, preferably the plurality of charging station temperature sensors 13, is adapted to determine a charging station area internal temperature t_LS^Bassociated with a spatial area of the charging station 1.

The control device 5 is operatively connected to the display device 3, the backlight 7, the fan 9, the at least one display device temperature sensor 11, the at least one charging station temperature sensor 13, and the climate conditioning device 15. Furthermore, the control device 5 is adapted to control the display device 3, the backlight 7 and the fan 9. In addition, the control device 5 is adapted to read out the at least one display device temperature sensor 11, the at least one charging station temperature sensor 13 and the climate conditioning device 15 and/or to receive information from the at least one display device temperature sensor 11, the at least one charging station temperature sensor 13 and the climate conditioning device 15. Furthermore, the control device 5 is adapted to perform a method for operating the display device 3.

The method for operating the display device 3 is explained in more detail in FIG. 2.

FIG. 2 shows a flow diagram of an embodiment example of the method for operating the display device 3 of the charging station 1.

In a first step a), an operating state Z_AVof the display device 3 is set based on a display device temperature t_AVassigned to the display device 3 and a charging station temperature state Z_LSassigned to the charging station 1.

Preferably, the operating state Z_AVof the display device 3 is additionally set based on a charging station internal temperature t_LSand/or an operating mode M_AVof the display device 3.

When the charging station is used as intended, the charging station internal temperature t_LSis typically from −20° C. to 45° C.

Preferably, in a first initial step a1), the charging station temperature state Z_LSis evaluated as a load state of the climate conditioning device 15.

If the charging station temperature state Z_LSis an overload state, the operating mode M_AVof the display device 3 is evaluated in a second first step a2).

If the display device 3 is in a priority mode, the display device temperature t_AVis evaluated in a third first step a3). If the display device temperature t_AVis greater than a maximum display device temperature, the first operating state

Z

A
⁢
V

1

is set. If the display device temperature t_AVis less than or equal to the maximum display device temperature, the last determined or preset operating state

Z

A
⁢
V



is maintained.

If the display device 3 is in a normal operation when the operating mode M_AVof the display device 3 is evaluated in the second first step a2), the first operating state

Z

A
⁢
V

1

is set.

If the load state Z_LSof the climate conditioning device 15 in the first first step a1) is a normal state, the charging station internal temperature t_LSis evaluated in a fourth first step a4). If the charging station internal temperature t_LSis greater than or equal to a at least display device ambient temperature, the second operating state

Z

A
⁢
V

2

is set. If the charging station internal temperature t_LSis less than or equal to a minimum display device ambient temperature, the third operating state

Z

A
⁢
V

3

is set. If the charging station internal temperature

Z

A
⁢
V

3

is less than the at least display device ambient temperature and greater than the minimum display device ambient temperature, the last determined operating state