WO2014117844A1

WO2014117844A1 - Method for reserving a charging device

Info

Publication number: WO2014117844A1
Application number: PCT/EP2013/051906
Authority: WO
Inventors: Stefan JÄGER; Thomas GEREKE
Original assignee: Siemens Aktiengesellschaft
Priority date: 2013-01-31
Filing date: 2013-01-31
Publication date: 2014-08-07

Abstract

The invention relates to a method for reserving a charging device (1) for a charging of a vehicle battery (16) of an electrically powered vehicle (14). According to the method, reservation data (302) for a reservation period are generated upon receipt of a reservation inquiry message (36) that contains a reservation period and a characteristic of a group (8) of a plurality of charging devices (1, 2, 3). The reservation data (302) are associated with the group (8).

Description

description

The invention relates to a method for reserving a charging device for charging a traction battery of an electrically driven vehicle and to a reservation system. In electrically driven vehicles is in a driving battery (accumulator) needed for driving

stored electrical energy. If the traction battery is discharged, then it must be recharged by means of a charging device. The loading usually takes a considerable amount of time. If a vehicle is to be charged at a charging device on which another vehicle is already being charged, the vehicle arriving later must wait until the charging process of the other vehicle has been completed and the other vehicle leaves the charging device and thus makes room for the vehicle arriving later , Such waiting times are annoying and preclude the acceptance of electrically driven vehicles.

The invention has for its object to provide a method and a system with which in a comfortable and flexible manner, a charging device for a

electrically driven vehicle can be reserved.

This object is achieved by a method and a system according to the independent claims. Advantageous embodiments of the method and the system are specified in the dependent claims.

According to the invention, a method is disclosed for reserving a charging device for charging a traction battery of an electrically driven vehicle, wherein in the method upon receipt of a reservation request message indicating a reservation time and a flag of a group of multiple load devices, reservation data for the reservation time are generated, and the reservation data is assigned to the group. It is particularly advantageous here that the reservation data are assigned to the group (and not one of the charging devices of the group). By means of this allocation of the reservation data to the group, one of the charging devices of the group is reserved for the reservation time. At the time of the allocation, however, it is still open which of the charging devices will actually be used for charging. It is only clear that one of the charging devices of the group will be reserved. Such an allocation gives a very flexible method for reserving a charging device. For example, sudden events such as a technical failure of a charging device or a spontaneous charging on a charging device (a so-called ad hoc charging, ie a spontaneous charging without prior reservation) do not adversely affect the process if another charging device of the group can be used at the reservation time.

The method may be configured such that a first charging device of the group is reserved for the reservation time. In this case, a first charging device of the group for the reservation time is reserved (in particular provisionally).

This reservation may be the final reservation that later allows the vehicle to be loaded. This reservation can also be changed until the start of the shop.

The method can be designed such that the reservation of the first charging device is canceled and another charging device of the group is reserved, if it turns out (eg due to an abrupt event) that the vehicle is being charged at the first charging device Reservation time is impossible. By means of this cancellation of the reservation and the reservation of the other loading device, a particularly flexible driving reached. Namely, if, at a time after the reservation of the first charging device, it turns out that the charging of the vehicle at the first charging device will not be possible at the reservation time, then the reservation of the first charging device is canceled and the other charging device is reserved. This method step can be carried out in secret for a user of the vehicle (for example for a driver of the vehicle). For example, the user may only be informed that (any) charging device of the group is reserved for his vehicle.

The method can also run such that a user of the vehicle is offered a choice among those loading devices of the group which are ready for use and are not occupied by a vehicle to be loaded at the reservation time. It is particularly advantageous that - regardless of which charging device of the group was initially reserved for the reservation time - the user is offered a choice among the ready-to-use and still unoccupied charging facilities of the group. This allows the user to choose freely among the ready-to-use and unoccupied charging devices. This leads to a very convenient and flexible method for the user.

The method may also be such that multiple loaders that match at least one feature are grouped into the group.

In this case, in particular a plurality of charging devices can be grouped into the group, which coincide in their location, which coincide in the current available for charging, which coincide in the charging power available for charging and / or which match in the type of charging plug. In this case, several charging devices are advantageously grouped into a group. In this case, such charging devices are grouped into the group that match in one or more features. This feature can be, for example, the location of the loading unit. direction: Then the charging devices are grouped into a group that are placed at the same location. However, the feature may also be the power type that can be provided for charging. Then those charging devices are grouped to the group providing the same type of current. Such types of current may be, for example: single-phase alternating current, three-phase alternating current or direct current. The feature may also be the charging electric charge power: then, for example, the charging devices are grouped into the group whose charge power is greater than a predetermined threshold value. For example, such charging devices may be grouped into the group having an electric charging power greater than 30 kW. Finally, the feature may also be the type of charging plug: there are various types of charging plugs, for example Schuko plugs or so-called type 2 plugs, as offered by the company Mennekes. It is also possible, for example, to group those charging devices into the group which have an earthing plug or are compatible with a shoe plug. Those charging devices may also be grouped into the group, which correspond in several of the aforementioned features. This results in a variety of ways to group several charging devices to a group. Of course, the charging devices can also be grouped into several groups, according to the characteristics to be taken into account.

The method may also be such that the group is assigned to a location of interest. As a result, the group can be found by means of a navigation system. A so-called "place of interest" is often referred to as POI (point of interest) .The assignment of the group to the place of interest makes the group searchable by means of a navigation system, for example by means of a vehicle navigation system Navigation systems have information about such places of interest and display them for their users. The method may also be such that, upon receipt of a search request message (eg, a user of the vehicle), the sender of the search request message (eg, the user) is informed about the location of the group. This makes it possible to send a search request message to a sender of the search query message (that is to say the driver of the vehicle, for example) when he is looking for a loading device. On the search request message, a suitable load device is determined (for example, read from a database) and the sender of the search query informs about the location of the group (to which this load device is assigned). This information can be done for example via the screen of a navigation system. This allows the sender of the search request message to conveniently search for a charging device.

The method may also be configured such that at least one charging device of the group is (only) placed in a reservation mode during the reservation time, when all ready charging devices of the group are either reserved at reservation time or occupied by a vehicle to be charged at the reservation time. In this case, a staggered in the reservation mode charging device can only be used to charge a vehicle, if this vehicle reservation data is present. Chargers may have a so-called reservation mode. If a charging device is set in the reservation mode, then this charging device can only be used to charge a vehicle if this vehicle has reservation data. In other words, there must be a reservation for this vehicle. Vehicles for which no advance reservation has been made can not be loaded at this charging facility. However, putting a charging device in the reservation mode has the disadvantage that this charging device is then unavailable for other vehicles for charging. In this embodiment of the method is particularly advantageous that one or more charging devices of the group only then be put into reservation mode when all ready-to-use charging devices of the group are either reserved at reservation time or already occupied by a vehicle. Only then will the charging devices of the group be blocked for vehicles for which no reservation data is available. In all other cases, the charging devices of the group need not be placed in the reservation mode, whereby vehicles without reservation can be loaded on a charging device of the group.

According to the invention, there is further provided a reservation system for reserving a charging device for charging a traction battery of an electric drivable vehicle, the reservation system being adapted to receive a reservation request message including a reservation time and a flag of a group of a plurality of charging devices to generate the reservation time and to allocate the reservation data to the group.

This reservation system can be designed to reserve a first charging device of the group for the reservation time. The reservation system may be configured to cancel the reservation of the first charging device and to reserve another charging device of the group if it turns out (for example due to a sudden event) that charging the vehicle at the first charging device at the reservation time is impossible.

The reservation system may also be arranged to offer a user of the vehicle a choice among those charging devices of the group which are ready for use and are not occupied by a vehicle to be charged at the reservation time. The reservation system may be configured to connect a plurality of charging devices that coincide in at least one characteristic, in particular a plurality of charging devices that coincide in their location, a plurality of charging devices that coincide in the charging current type, a plurality of charging devices that match in the charging electric charge capacity and / or a plurality of charging devices, which are the same as the charging plug, grouped into the group.

The reservation system can also be designed, the

Assign group to a place of interest. As a result, the group can be found by means of a navigation system. The reservation system may be configured, upon receipt of a search request message (e.g., a user of the vehicle), to inform the sender of the search request message (e.g., the user) of the location of the group. The reservation system may also be configured to place at least one charging device of the group (only then) in a reservation mode during the reservation time, when all ready charging devices of the group are either reserved at reservation time or occupied by a vehicle to be charged at the reservation time. A charging device placed in the reservation mode can only be used to charge a vehicle if this vehicle has reservation data relating to it. The reservation system also has the advantages stated above in connection with the method.

The invention will be explained in more detail below with reference to an exemplary embodiment. This is in

Figure 1 shows an embodiment with a reservation system and two groups of charging devices, in FIG. 2 shows an exemplary method sequence for reserving a charging device, in FIG

Figure 3 shows an embodiment of an assignment of

Reservation data for a group, in

FIG. 4 shows a further exemplary embodiment of an assignment of reservation data to a group, in FIG. 5 a further exemplary embodiment of an assignment of reservation data to a group, in FIG

Figure 6 shows an embodiment of a time-related

Reservation of a charging device of a group, in

FIG. 7 shows another embodiment of a time-related reservation of a charging device

Group, in Figure 8, another embodiment of a time-related reservation of a charging device of a group and in

9 shows an exemplary representation of features of

Charging devices of a group shown.

In FIG. 1, a first charging device 1, a second charging device 2, a third charging device 3, a fourth charging device 4 and a fifth charging device 5 are shown schematically in the left part. In this case, the first charging device 1, the second charging device 2 and the third charging device 3 are assigned to a first group 8. In other words, the first charging device 1, the second charging device 2, and the third charging device 3 are grouped into the first group 8. The fourth charging device 4 and the fifth charging device 5 are assigned to a second group 10. In other words, the fourth charger 4 and the fifth charger 5 are the second group 10 grouped. These charging devices can be configured, for example, as charging stations. The first charging device 1 is electrically connected by means of an electric charging cable 12 to an electrically drivable vehicle 14 in order to charge a driving battery 16 of this vehicle 14. In another exemplary embodiment, however, the electrically drivable vehicle 14 can also be electrically connected to the third charging device 3 (for example by means of an inductive energy transmission device).

The five loaders 1 to 5 are in communication with a manager 20. This manager (loader manager 20) monitors the loaders. In particular, the management device 20 monitors the functional status of the charging devices 1 to 5 and the use of the charging devices by vehicles. The charging devices 1 to 5 regularly send information to the management device 20, in particular status information about their functional status and their use (eg the occupancy by vehicles). The manager 20 sends commands to the chargers 1 to 5, for example, to unlock the chargers for charging a vehicle. This message exchange between the management device 20 and the charging devices 1 to 5 is shown by arrows 22.

The management device 20 is connected to a reservation system 26 via a first interface 24. Via this first interface 24, the reservation system 26 can, for example, instruct the management device 20 to place one of the charging devices in a so-called reservation mode.

The reservation system 26 has a reservation device 28 and a user interface 30. The reservation device 28 and the user interface 30 are connected to one another via a second interface 32. A user of the reservation system 26 can, for example, with a communication terminal 34 (for example, by means of a mobile phone, a smartphone or an Internet-capable computer) access the user interface 30 in order to achieve a reservation of a charging device. For this purpose, the user can send a search request message 35 and / or a reservation request message 36 to the user interface 30 of the reservation system 26 by means of its communication terminal 34. Reservation data is generated in the reservation device 28 in response to the reservation request message 36, stored in a data memory 38 and assigned to a group of charging devices.

The first group 8 has the three charging devices 1, 2 and 3; the second group 10 has the two charging devices 4 and 5. In the illustrated embodiment, the first group 8 and the second group 10 are located at a location of interest 40. Such a "location of

Interest "is also referred to as POI (Point of Interest) In the example of Figure 1 this place of interest is the central station of a city The first group 8 comprises the three charging facilities 1, 2 and 3 located on a first parking lot at the main train station The second group 10 includes the charging devices 4 and 5, which are located on a second parking lot at the main train station, so the first group 8 and the second group 10 are located at the point of interest "Hauptbahnhof". Therefore, the reservation system 26 assigns the first group 8 and the second group 10 to the location of

Interest "Hauptbahnhof" and stores this assignment in the data memory 38 of the reservation system 26. Thereby, the first group 8 and the second group 10 can be found, for example by means of a navigation system, if this navigation system can search for places of interest.

Thus, three charging devices are grouped in the first group 8, which coincide in their location, namely in the location "main station." However, in other embodiments, charging devices can also be grouped into a group which can be stored in the charging mode. type (single-phase AC, multi-phase AC, DC, etc.). In yet another exemplary embodiment, charging devices can also be grouped into a group that corresponds to the charging power that can be provided for charging (for example charging power greater than 30 kW). It is also possible to group several charging devices into a group which correspond in type of charging plug (eg all charging devices have a safety plug). Likewise, only such load devices can be grouped into a group that match in several of the mentioned features. The grouping can be done manually in advance of the procedure by an administrator of the administrative facility; The grouping can also be done automatically by the reservation system.

The method for reserving a charging device will be described in more detail below with reference to FIG. FIG. 2 shows steps 210 to 290 in which the following actions take place.

Step 210: Grouping Multiple Chargers into a Group

Step 220: Assign the Group to a Place of Interest (POI)

Step 230: In response to a search request message, look for a loader and find the group; Inform the sender of the search query about the group

Step 240: Receive a reservation request message for the group for a reservation time

Step 250: Generate reservation data and associate the reservation data with the group Step 260: Reserve a first charging device of the group

Step 270: Canceling the reservation of the first charging device and reserving another charging device of the group if it turns out that charging of the vehicle at the first charging device at the reservation time is impossible (for example due to a sudden event)

Step 280: placing the group's charging devices in a reservation mode only when all of the group's charging devices (reserved, i.e., ready to charge) are reserved at reserve time or occupied by a vehicle (i.e., only when all the charging devices in the group are fully utilized)

Step 290: Offering a choice among those charging devices of the group that are operational and are not occupied by a vehicle to be charged at the reservation time (i.e., at which charging of the vehicle at the reservation time is possible)

In the first step 210, a plurality of charging devices are assigned to one group, ie several charging devices are grouped into a group. Then, in step 220, the group is assigned to a point of interest (POI). The assignment can be made manually in advance of the procedure by an administrator of the administration facility; but the assignment can also be made automatically by the reservation system. These two steps 210 and 220 can also already take place in advance of the method. In the state illustrated in FIG. 1, these steps have already been taken: the three charging devices 1, 2 and 3 are grouped into the first group 8, the two charging devices 4 and 5 are grouped into the second group 10. The first group 8 and the second group 10 are assigned to the place of interest "Hauptbahnhof". Afterwards, a user of the vehicle 14 (for example the driver of the vehicle 14) sends the search request message 35 to the user interface 30 of the reservation system 26 by means of his communication terminal 34. By means of this

Search Request Message 35 transmits the information to the reservation system that a loader is searched for at the location of interest "Main Station." The reservation system 26 then reads from the data memory 38 the information that the location of interest "Main Station" is the first group 8 of charging devices and the second group 10 of charging devices is present. The reservation system thus has the function of a navigation system here. This information sends the reservation system back to the communication terminal 34. (Alternatively, this information can also be provided by a stand-alone navigation system, eg a navigation system installed in the vehicle.) This informs the user of the communication terminal (ie the sender of the search request message 35) about the first group 8 and the second group 10, step 230 ,

This search for suitable charging devices can generally take place in different variants. These variants can each be limited by means of further features (type of current, charging power and / or type of charging plug). The following are three exemplary variants:

1st variant: Search at the current location or at a defined location (via website or navigation system or similar)

2nd variant: search in a place of interest (via navigation system)

3rd variant: search with a pre-selection of charging car parks (via website or navigation system or similar)

The user then sends the reservation request message 36 to the user interface 30 of the reservation system 26 by means of his communication terminal 34. These Reservation request message 36 contains the information that on Wednesday, January 23, 2013, between 10:00 and 12:00 o'clock, a charging device of the first group 8 (ie the group at the first parking lot of the main station) is to be reserved. Optionally, the reservation request message 36 can also be used to transmit the information that alternating current is required for charging the vehicle 14 and that the vehicle is to be connected to the charging device by means of a safety plug. This reservation request message 36 thus contains a number of the first group 8, the desired reservation time (23.01.2013, 10:00 to 12:00 clock), and optionally the required type of current (AC) and the required type of charging plug (Schukostecker).

The reservation system 26 then receives the reservation request message 36, step 240. The reservation system 26 then generates reservation data pertaining to the reservation request message 36. The reservation system 26 then assigns the reservation data to the group 8, step 250. This assignment means that a charging device of the first group 8 is to be used at the reservation time, wherein initially it is not yet clear which charging device this will be.

In FIG. 3, the reservation data 302 are shown schematically as a block 302. Furthermore, it is shown by means of a double arrow 304 that the reservation data 302 are assigned to the first group 8. It can be clearly seen that the reservation data 302 are assigned to the first group 8, but not to a special group 8 charging device.

Likewise, further reservation data 306 are shown in FIG. 3, which are likewise assigned to the first group 8 (arrow 308). In the example of FIG. 3, the second group 10 is not assigned any reservation data, ie for the two 5

Chargers 4 and 5 of the second group 10 have not received any reservation request messages.

In the next step 260 of FIG. 2, the second charging device 2 of the first group 8 becomes the reservation time

(23.01.2013, 10:00 to 12:00 clock) reserved. This reservation is initially an internal reservation, which takes place only in the data memory 38 of the reservation system 26. This reservation is not visible to the outside, in particular not for the user of the communication terminal 34. This reservation is only for planning the assignments of the individual charging devices of the first group 8. Later (ie at a time between the reservation of the second charging device 2 and the beginning of Reservation time), loading of the vehicle 14 on the second loader 2 at the reservation time may become impossible. This can be caused, for example, by a sudden event, such as a defect of the second charging device 2 or a sudden unauthorized parking of a vehicle on the second charging device 2, which blocks the second charging device 2. Thus, if it turns out that loading of the vehicle 14 on the second loader 2 at the reservation time is impossible, the reservation of the second loader 2 is canceled and another loader of the first group 8 is reserved: In the embodiment, the first loader 1 of the first group 8 reserved for the reservation time. In other words, the reservation is shifted from the second loader 2 to the first loader 1, compare step 270 of Fig. 2. This may be referred to as a dynamic shift of the reservation.

This cancellation of the reservation of the second loader and the reservation of the first loader (that is, the shift of the reservation from the second to the first loader) allows a highly flexible method of reservation that can respond to unpredictable events such as disturbances or unpredictable events Blocking a charging device by loading or parked vehicles. In particular, such unpredictable events do not result in charging of the vehicle 14 can not be performed or that a charging device is unnecessarily blocked by a reservation.

FIGS. 4 and 5 show the shift of the reservation from one loading device to another loading device. FIG. 4 shows that the second charging device 2 is reserved at the reservation time. The reservation is symbolized by the letter R on the second charging device 2. The reservation system cancels this reservation and instead reserves the first loader 1 for the reservation time. This condition is illustrated in Figure 5 where the reservation is again symbolized by the letter R above the loader. It can be clearly seen in FIG. 5 that the reservation data 302 are furthermore assigned to the first group 8.

Referring to FIG. 2, in an optional step 280, the group 8 charging devices are placed in the reservation mode only when all group 3 charging devices (ie, ready to charge) are either reserved at reserve time or are occupied by a vehicle. The charging devices of group 8 are therefore only put into the reservation mode when a full utilization of all charging devices of group 8 is present. This case would therefore occur, for example, if both the first charging device 1, the second charging device 2 and the third charging device 3 of the first group 8 are reserved at the time of reservation. Likewise, the charging devices 1, 2 and 3 of the first group 8 would be put into the reservation mode when the first charging device 1 and the second charging device 2 are reserved at the reservation time and the third charging device 3 is defective. Otherwise, however, the charging means of the first group 8 will not be put into the reservation mode. This is particularly advantageous because 7

then these charging devices are also available to users who have not reserved. Thus, spontaneous charging (ad hoc charging) to the charging devices of the first group 8 can be realized.

In step 290 of FIG. 2, the driver of the vehicle 14 is optionally offered, upon arrival at the first parking space, all the charging devices of the group for selection, which are ready for use and are not occupied by a vehicle at the reservation time. So these are those charging devices where the loading of the vehicle 14 at the reservation time is possible. The driver of the vehicle 14 can then select any charging device from among those charging devices and charge his vehicle there.

FIG. 6 shows by way of example how the reservations of the three charging devices 1, 2 and 3 are stored in the data memory 38 of the reservation system 26. For this purpose, a first upper line for the first charging device 1, a second middle line for the second charging device 2 and a third lower line for the third charging device 3 are shown in a diagrammatic representation in FIG. Each line covers the time range from 9:00 to 14:00 on 23.01.2013. By means of different

Hatching the state of the individual charging devices is shown for each time.

By means of vertical hatching 602, free (i.e., available, unreserved) loaders are shown. It can be seen that the first charging device 1 between

9:00 and 14:00 is free. The second charging device 2 is available between 9:00 and 10:00 and between 12:00 and 14:00. By hatching 604 from bottom left to top right is shown that a charging device is reserved. It is easy to see that the second charging device 2 is reserved between 10:00 and 12:00. By means of a horizontal hatching 606 is shown that the charging device 3 is in planning. The charging device 3 is therefore not ready for use from 9:00 to 14:00. In FIG. 6, therefore, the state corresponding to FIG. 4 is shown: the second charging device 2 is reserved between 10:00 and 12:00 o'clock.

In FIG. 7, by means of the newly occurring hatching 702, which runs from top left to bottom right, it is shown that the second charging device 2 is disturbed between 11:30 and 14:00 o'clock; This charger is therefore not ready for use from 11:30 clock. This disorder may occur, for example, due to an unforeseen event that was not originally known. For this reason, the reservation of the second loader 2 is canceled, instead, the first loader 1 is reserved between 10:00 and 12:00 o'clock, as seen in the upper line of the illustration of Figure 7 by the hatching 704 from bottom left to top right is. This shift of the reservation from the second charging device 2 to the first charging device 1 can take place either before 10:00 o'clock, if it is already known at this time that the malfunction of the second charging device 2 will occur at 11:30 o'clock. However, if the failure of the second charger 2 occurs suddenly and unpredictably at 11:30 am, then the reservation may be shifted from the second charger 2 to the first charger 1 at 11:30, provided that the charging operation at the second charger 2 has not started yet.

FIG. 8 shows a further example. Based on the situation according to FIG. 6, it is assumed that the charging process of the vehicle 14 at the second charging device 2 has not yet started at 11:30. At 11:30, another vehicle (without reservation) starts to load spontaneously at the second charging device 2 (ad hoc loading). This spontaneous loading is between 11:30 and 13:30 at the Charger 2 represented by the crosswise hatching 802.

Thereafter, the reservation of the second charging device 2 for the vehicle 14 is canceled from 10:00 to 12:00, and the first charging device 1 is reserved for the vehicle 14 between 10:00 and 12:00. This is represented by the hatching 804. The third charging device 3 of group 8 is not ready for use; Only the first charging device 1 and the second charging device 2 are ready for use. The first charging device 1 is reserved between 11:30 and 12:00, the second charging device 2 is occupied between 11:30 and 12:00 by the other vehicle to be charged spontaneously and thus

blocked. Therefore, the first charger 1 is placed in a reservation mode for the period between 11:30 and 12:00 o'clock. The consequence of this transfer to the reservation mode is that the first charging device 1 can only be used by a vehicle for which a reservation is present (in the exemplary embodiment, therefore, by the vehicle 14). Other vehicles can not be charged at the first charging device 1 during the period of 11:30 and 12:00. (If now another reservation request for the first group 8 would arrive for the time between 11:30 and 12:00, then the reservation request conveyed with this reservation request message would be rejected.) If the vehicle 14 is now at the first group 8 arrives, it can be loaded on the first charging device 1.

If a charging device for which a reservation is made suddenly fails, then this reservation is specially marked. As a result, it is clear to the user of the vehicle (eg via the communication terminal thereof) that the charging device is currently not (anymore) reserved for him. In this case, further steps can be taken. As soon as the charging device is available again, the Removed special marking and possibly the charging device back into the reservation mode.

FIG. 9 shows which further information about the three charging devices 1, 2 and 3 of the first group 8 are stored in the data memory 38 of the reservation system 26. For this purpose, a matrix-like representation below the charging devices 1, 2 and 3 is shown. In a first upper line 901 of this matrix-type representation, it is shown which of the three charging devices is the current type

By means of a minus sign it is stated that the first charging device 1 and the third charging device 3 can not provide direct current, by means of a plus sign it is indicated that the second charging device 2 can provide direct current indicated by three plus signs that all three charging devices 1, 2 and 3 can provide the current type "AC". In a third line 905 is shown by two plus signs that the first charging device 1 and the second charging device 2 have a Schuko plug; However, the third charging device 3 has no Schukostecker. In a fourth line 907 it is shown that all three charging devices 1, 2 and 3 have a so-called type 2 plug.

This information is stored in the data memory 38 of the reservation system 26. If information about the type of current and the nature of the charging plug is transmitted to the reservation system by means of the reservation request message 36, then the reservation system can take this information into account when making the reservation. Alternatively, this information can also already be stored in a vehicle-related manner in the reservation system and then need not be retransmitted with each reservation request message.

It will be assumed below that in the reservation system the following reservation data for four different These reservations are available. These four reservations are shown in Figure 9 as blocks 910, 912, 914 and 916:

Reservation 1 (block 910):

Parking 1 (corresponds to the first group 8)

10:00 to 12:00

alternating current

Schuko plug reservation 2 (block 912):

Parking 1 (corresponds to the first group 8)

11:00 to 12:00

Schuko plug reservation 3 (block 914):

Parking 1 (corresponds to the first group 8)

10:00 to 12:00

AC reservation 4 (block 916):

Parking 1 (corresponds to the first group 8)

10:00 to 11:00

DC By comparing this reservation data with the information stored on the reservation system via the three charging devices 1, 2 and 3, the reservation system can select and reserve the appropriate charging devices of the first group 8. In this case, the first charging device 1 would be reserved for the reservation 1, for the reservations 2 and 4 the second charging device 2 and for the reservation 3 the third charging device 3. In the example, all four reservations are realized. Thus, a maximum occupancy of the charging devices is achieved even in difficult constellations of the desired reservations.

With the described method and the charging device described, it is advantageously avoided that a limited flexibility for users (eg for users of vehicles) exists. Such limited flexibility may occur when reservations relate to initially defined charging devices and the user then has to load at the appropriate charging device. Furthermore, there is a convenient method for the user, since this can search by means of a place of interest (POI) charging facilities. In the solution presented, the user not only in the case of enough free charging devices has a choice among the charging devices of a group. The user also has a choice if, for example, 10 reservations are available for all 10 charging devices of a group for a specific reservation time, but not all charging devices are already occupied. Then the user can still choose among the unoccupied charging devices, which charging device he wants to use for charging. Furthermore, loading is possible without reservation. If such unplanned spontaneous charging processes occur (ad hoc charging processes), any reservations that may already be available are moved to other, free charging facilities.

In the method, the reservation data is assigned to the group but not to a loader of the group. This gives both the user a choice in which charging device he wants to use. This also provides the reservation system with the ability to respond to unforeseen events, such as ad hoc loading or failure of a charging device. The user even has a choice among various

Charging facilities of the group, if he has no reservation, so if he wants to make an ad hoc loading. Moreover, in the event of a defect of a charging device, a reservation for this charging device does not necessarily have to expire since, if possible, another charging device of the group is used or reserved. Even if charging devices have to be put in the reservation mode, this can be done flexibly. Thus, reservation mode staggered loaders may be provided with multiple reservations, so that the user still has the choice among these multiple reservation modes in charge mode. However, the reservation mode ensures that these charging devices are only available to a limited number of people (namely persons with a reservation).

Some data may be used for the reservation of charging facilities. This data includes master data (loader location information, addresses, supported charging and plugging, reservation, etc.), information about the groups, and regularly updated status information.

A method and a reservation device have been described which allow flexible reservation of charging devices. In doing so, it is possible to react flexibly to sudden events. The replacement of reservations without reservation is largely avoided.

Claims

claims

1. A method for reserving a charging device (1) for charging a traction battery (16) of an electrically drivable vehicle (14), wherein in the method

- upon receipt of a reservation request message (36) containing a reservation time and a tag of a group (8) of a plurality of charging devices (1, 2, 3), reservation time reservation data (302) are generated, and

- the reservation data (302) are assigned to the group (8).

2. The method according to claim 1,

d a d u r c h e c e n c i n e s that

- A first charging device (2) of the group is reserved for the reservation time.

3. The method according to claim 2,

d a d u r c h e c e n c i n e s that

- Reserving the first charging device (2) is canceled and another charging device (1) of the group (8) is reserved, if it turns out that loading the vehicle (14) on the first charging device (2) at the Reservationszeit is impossible.

4. Method according to one of the preceding claims, characterized in that

- A user of the vehicle (14) is offered a choice among those charging devices of the group (8), which are ready for use and are not occupied by a aufzuladendes vehicle at the reservation time.

5. The method according to any one of the preceding claims, d a d u r c h e c e n e c e in that e

a plurality of charging devices (1, 2, 3) which coincide in at least one characteristic, in particular a plurality of charging devices which coincide in their location, which in the match the type of electricity that can be provided for charging, which coincide in the charging power that can be provided for charging and / or which correspond in the manner of the charging plug, to the group (8) are grouped.

6. Method according to one of the preceding claims, characterized in that

- the group (8) is assigned to a place of interest (40).

7. Method according to one of the preceding claims, characterized in that

upon receipt of a search request message (35), the sender of the search request message (35) is informed of the location of the group (8).

8. The method according to any one of the preceding claims, d a d u r c h e c e n e c e in that e

- a charging device (1) of the group (8) is placed in a reservation mode when all ready charging devices (1, 2) of the group (8) are either reserved at reservation time (1) or at the reservation time occupied by a vehicle to be charged ( 2).

9. Reservation system for reserving a charging device (1) for charging a traction battery (16) of an electrically driven vehicle (14), wherein the reservation system is formed

upon receipt of a reservation request message (36) indicating a reservation time and a flag of a

Group (8) of a plurality of charging devices (1, 2, 3) to generate reservation data (302) for the reservation time, and

- allocate the reservation data (302) to the group (8).

10. reservation system according to claim 9,

characterized in that - The reservation system is adapted to reserve a first charging device (2) of the group (8) for the reservation time.

11. Reservation system according to claim 10,

d a d u r c h e c e n c i n e s that

- The reservation system is adapted to cancel the reservation of the first charging device (2) and reserve another charging device (1) of the group (8), if it turns out that charging the vehicle (14) to the first charging device (2) the reservation time is impossible.

12. The reservation system according to claim 9, wherein:

- the reservation system is designed to be a user of the

Vehicle (14) to offer a choice among those charging devices of the group (8), which are ready for use and are not occupied by a aufzuladendes vehicle at the reservation time.

13. The reservation system according to claim 9, wherein:

if the reservation system is designed to have a plurality of charging devices (1, 2, 3) which coincide in at least one characteristic, in particular a plurality of charging devices which coincide in their location, a plurality of charging devices which correspond in the charging mode, a plurality of charging devices, to match in the charging power available for charging and / or several charging devices that match the type of charging plug to group group (8).

14. The reservation system according to claim 9, wherein: e

- The reservation system is adapted to assign the group (8) to a place of interest (40).

15. Reservation system according to one of claims 9 to 14, characterized in that

- The reservation system is adapted, upon receipt of a search request message (35) to inform the sender of the search request message (35) on the location of the group (8).

16. The reservation system according to claim 9, wherein:

- The reservation system (26) is adapted to put a charging device (1) of the group (8) in a reservation mode when all ready chargers (1, 2) of the group (8) are either reserved at reservation time (1) or at the reservation time occupied by a vehicle to be loaded (2).