Charging system with inductive charging device

Abstract

The invention relates to a charging system (1) having stationary inductive charging devices (2) spaced apart from one another for wireless energy transmission. An improved efficiency of the charging system (1) is achieved with improved comfort in that the respective inductive charging device (2) has a positioning device (4) for positioning a mobile inductive charging device (101) relative to the stationary inductive charging device (2), and the stationary inductive charging devices (2) are divided into groups (6), when the motor vehicle (100) approaches the respective group (6), the positioning device (4) of the group (6) is activated. The invention further relates to a parking lot system (300) having a parking lot (200) and such a charging system (1).

Description

Technical Field

[0001] The invention relates to a charging system with a stationary inductive charging device for wireless energy transmission with a motor vehicle. In addition, the invention relates to a parking lot system with a parking lot and such a charging system. Background Art

[0002] Wireless energy transmission to the motor vehicle can be carried out inductively. For this purpose, a mobile inductive charging device of the motor vehicle cooperates with a stationary inductive charging device. The corresponding inductive charging device has a power coil, wherein one of the power coils is used as a primary coil and the other power coil is used as a secondary coil for energy transmission. In order to enable this type of energy transmission and to increase the efficiency of the energy transmission, it is necessary to position the power coil and thus the mobile inductive charging device accordingly relative to the stationary inductive charging device.

[0003] The charging system may have a plurality of such stationary inductive charging devices, so that the corresponding stationary inductive charging devices can wirelessly transfer energy together with a mobile inductive charging device of the motor vehicle. Summary of the invention

[0004] The invention is based on the object of providing an improved or at least different embodiment for a charging system of the type described in the introduction and for a parking system comprising such a charging system, which in particular eliminates the disadvantages of the prior art. In particular, the invention is based on the object of providing an improved or at least alternative embodiment for the charging system and for the parking system, which is distinguished by improved efficiency while improving operation and increasing comfort.

[0005] This object is achieved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject matter of the dependent claims.

[0006] The present invention is therefore based on the following general idea: in a charging system with a stationary inductive charging device for wireless energy transmission with a mobile inductive charging device of a motor vehicle, the corresponding stationary inductive charging device is equipped with a positioning device, which generates at least one positioning signal in an activated state for positioning the mobile inductive charging device relative to the stationary inductive charging device. In this way, the mobile inductive charging device and thus the assigned motor vehicle can be positioned relative to the corresponding stationary inductive charging device in a desired manner and with improved accuracy. This can achieve a sufficiently high coupling between the stationary inductive charging device and the mobile inductive charging device in a simple manner so that energy transmission is achieved, and this also leads to an improved energy transmission between the corresponding stationary inductive charging device and the mobile inductive charging device positioned relative to the stationary inductive charging device. This leads to an improved efficiency of the charging system. At the same time, the present invention is based on the following general idea: the stationary inductive charging devices are divided into groups, and the positioning device of the corresponding group is at least partially deactivated in each case, and the positioning device is only activated when the motor vehicle approaches the group. This results in that the stationary inductive charging devices of the corresponding group are only fully operated, in particular only completely generate a positioning signal, when energy transmission to the mobile inductive charging device of the motor vehicle appears to be possible or is completely possible. This reduces the energy consumption of the charging system. This in turn leads to an increased efficiency of the charging system. At the same time, by activating the positioning device of the corresponding group, the motor vehicle is offered a choice of possible available stationary inductive charging devices, relative to which the motor vehicle can be positioned with the aid of the respectively assigned positioning device. This leads to improved operation and increased comfort.

[0007] According to the concept of the present invention, the charging system includes a plurality of stationary inductive charging devices spaced apart from each other. During charging operation, the corresponding stationary inductive charging device inductively cooperates with the mobile inductive charging device of the motor vehicle for wireless energy transmission. The stationary inductive charging device is divided into at least two groups, and the corresponding group includes at least two stationary inductive charging devices. The corresponding stationary inductive charging device has a positioning device, which generates a positioning signal during positioning operation for positioning the mobile inductive charging device of the motor vehicle relative to the stationary inductive charging device. The corresponding inductive charging device has an activation interface for activating and deactivating the positioning device, which is also referred to as the activation interface below. In addition, the corresponding group has a device that recognizes the approach of the motor vehicle to the assigned group and is also referred to as the trigger device below. That is, the corresponding trigger device is configured so that the trigger device recognizes the approach of the motor vehicle to the assigned group. The corresponding trigger device is connected to the activation interface of the stationary inductive charging device of the assigned group in a communication manner. Here, the corresponding trigger device at least partially activates the positioning device of at least the unoccupied stationary inductive charging device of the assigned group by means of the activation interface when recognizing that the motor vehicle is approaching the assigned group. The corresponding trigger device is designed accordingly.

[0008] As mentioned above, the locating device is at least partially deactivated and is activated when the motor vehicle approaches the group to be assigned. That is to say, expediently, each locating device in the locating device is at least partially deactivated and is activated when the motor vehicle approaches the group to be assigned.

[0009] In the present case, “corresponding” is to be understood in particular as “each individual one.” Thus, “corresponding positioning devices of a group” means “each individual positioning device of the group.”

[0010] Partial activation of the respective locating device means that the locating device is at least partially deactivated in the otherwise deactivated state.

[0011] The partial activation of the locating devices of a group in each case as a function of the approach of a motor vehicle to the group means that the locating devices of the remaining groups are in a deactivated state, in particular if no motor vehicle is approaching the remaining groups.

[0012] By activating with the aid of the trigger device, the corresponding positioning device can be fully activated. In particular, this is the case when the positioning device is fully deactivated, ie switched off, in the deactivated state.

[0013] The partial activation of the locating device is preferably performed when the locating device is only partially deactivated in the deactivated state. That is, in the deactivated state, the locating device can be, for example, in a standby state, in which the locating device at least partially generates a locating signal. In particular, it is conceivable that the locating device generates a locating signal in the standby state for long-distance or rough locating of the motor vehicle.

[0014] In the following, “activate” and “activate” are to be understood as meaning a preferably complete activation of the locating device, so that the locating device completely generates a locating signal.

[0015] In the following, “deactivate” and “deactivate” are to be understood as at least partial deactivation of the locating device, so that the locating device is either completely switched off or is in a standby state.

[0016] The configuration according to the invention is advantageous because, as long as no motor vehicle approaches the charging system, all locating devices can be in a relatively energy-saving deactivated state, and if a motor vehicle approaches a group of charging systems, only the locating devices of this group can be activated and all other locating devices can remain in a relatively energy-saving deactivated state.

[0017] Advantageously, during operation, the corresponding stationary inductive charging device is designed for wireless energy transmission with a single motor vehicle, in particular with a single mobile inductive charging device. This means in particular that the corresponding stationary inductive charging device advantageously forms a charging point of the charging system.

[0018] In the present case, approaching a group is to be understood in particular to mean that the distance between the motor vehicle and the group is smaller than a predefined value.

[0019] An unoccupied stationary inductive charging device is in particular a stationary inductive charging device that is not in a charging operation and / or not in a positioning operation, that is, those stationary inductive charging devices that are available for wireless energy transmission with a motor vehicle are unoccupied.

[0020] Preferred embodiments are those in which at least one of the trigger devices, preferably the respective trigger device, activates only the locating device of an unoccupied stationary inductive charging device when a motor vehicle approaches. This results in a further reduction in the energy consumption of the charging system and thus in a further increase in efficiency. In addition, this results in less overlap of the locating fields and only the stationary inductive charging devices that are actually available are made available to the motor vehicle. This leads to improved operation.

[0021] Advantageously, the charging system is used in a parking system, which also includes a parking lot. The parking lot includes a plurality of parking spaces, wherein at least some of the parking spaces are provided with an associated stationary inductive charging device of the charging system. This means that the corresponding stationary inductive charging device is arranged at the associated parking space. This results in a corresponding grouping of the parking spaces.

[0022] Advantageously, the respective parking space is provided for a single motor vehicle.

[0023] At least one of the stationary inductive charging devices may be situated at an associated parking space.

[0024] At least one of the stationary inductive charging devices can be at least partially embedded in an associated parking space. In particular, at least one of the stationary inductive charging devices can be completely embedded in an associated parking space.

[0025] The corresponding inductive charging device has a coil for inductive energy transmission, which is also referred to as the energy coil below. This means that the corresponding stationary inductive charging device and the corresponding mobile inductive charging device have energy coils. For wireless energy transmission, the energy coil of the stationary inductive charging device serves as a primary coil and the energy coil of the mobile inductive charging device positioned relative to the stationary inductive charging device serves as a secondary coil, or vice versa. This means that in the present case, the energy transmission can also be understood as bidirectional wireless energy transmission.

[0026] The mobile inductive charging device is advantageously positioned relative to the stationary inductive charging device in such a way that the power coils are positioned relative to one another in order to achieve an optimal inductive coupling between the power coils.

[0027] To locate the mobile inductive charging device, the associated motor vehicle receives a positioning signal, wherein navigation instructions are advantageously generated and output based on the positioning signal. To receive the positioning signal, the motor vehicle, in particular the mobile inductive charging device, can have at least one corresponding receiver, for example at least one receiving coil.

[0028] The positioning device is expediently deactivated when the mobile inductive charging device is positioned relative to the associated stationary inductive charging device, in particular when the associated stationary inductive charging device is in charging operation.

[0029] Preferably, the charging operation begins when the mobile inductive charging device has been positioned relative to the stationary inductive charging device. This means in particular that the charging operation begins after the positioning operation. As a result, energy consumption is reduced and the operation becomes more robust.

[0030] The corresponding navigation instructions can be provided to the vehicle driver, who drives the motor vehicle, in particular steers the motor vehicle according to the navigation instructions, in order to position the inductive charging devices relative to one another. Alternatively or additionally, the corresponding navigation instructions can be output to a driver assistance system for at least partially autonomously driving the motor vehicle, so that the driver assistance system drives the motor vehicle at least partially autonomously with the aid of the navigation instructions in order to position the inductive charging devices relative to one another.

[0031] The start of the positioning, so-called "pairing" between the motor vehicle and the stationary inductive charging device, advantageously takes place when approaching the respective stationary inductive charging device, in particular when approaching an associated parking space. By activating the positioning device of the respective group, the respective motor vehicle is provided with the possibility of selecting between available, i.e. unoccupied, stationary inductive charging devices, in particular parking spaces, of the respective group.

[0032] The positioning signal may be any type of positioning signal as such.

[0033] In particular, the locating signal can include at least one field. That is to say, the locating device can generate at least one field.

[0034] Advantageously, at least one of the at least one field, preferably the respective field, is a magnetic field. This results in a simplified and robust reception of the locating signal on the motor vehicle, especially compared to an electromagnetic field, so that the locating is achieved reliably and robustly.

[0035] To generate a corresponding magnetic field, the locating device can include at least one coil, which is also referred to below as a transmitting coil. Advantageously, the corresponding transmitting coil is different from the power coil of the stationary inductive charging device.

[0036] Preferably, at least one of the positioning devices, advantageously a corresponding positioning device, generates at least two mutually offset fields, preferably at least two mutually offset magnetic fields, the ratio of which is used for positioning. This enables simplified positioning, in particular without prior calibration.

[0037] Preferably, the corresponding trigger device is also configured in such a way that it recognizes an absence state of the assigned group, in which no motor vehicle is located in the group or all motor vehicles located in the group are in charging operation and no motor vehicle is approaching the group, and when the absence state is recognized, the positioning device of the assigned group is deactivated by means of the activation interface.

[0038] Preferably, alternatively or additionally, the positioning device of the assigned group is only deactivated when a motor vehicle previously approaching the group begins positioning and / or transferring energy within the group with the aid of one of the assigned stationary inductive charging devices, that is to say in particular when one of the stationary inductive charging devices of the group is in charging operation with a mobile inductive charging device of the motor vehicle.

[0039] A corresponding trigger device can be designed in any desired manner for detecting the approach of a motor vehicle.

[0040] It is conceivable that at least one of the release devices has and / or monitors a motion detector and / or an induction loop in the ground or in the roadway and / or a light barrier and / or an opening device for opening a door or a fence in order to detect the approach of a motor vehicle to the assigned group.

[0041] The following embodiment is considered to be preferred: in the embodiment, at least one of the trigger devices has a wireless communication interface, which covers an area including the assigned group by means of a wireless network and communicates with the motor vehicle by means of the network. Here, when the motor vehicle communicates with the wireless communication interface, the approach of the motor vehicle is detected. That is, when the motor vehicle enters an area covered by means of the network, the approach of the motor vehicle can be detected. As a result, a simple and reliable detection of the approach of the motor vehicle is produced, without the need for structural measures for this purpose. In particular, for this purpose, it is not necessary to structurally process the ground and / or the roadway accordingly.

[0042] The trigger device expediently also detects by means of the wireless network whether the motor vehicle is in the assigned group or away from the group. Such a detection, in particular the detection of an absence state, is preferably performed when no motor vehicle communicates with the wireless communication interface by means of the wireless network.

[0043] The wireless communication interface generates a wireless network and covers the zone by means of the network. In particular, the zone corresponds to the area covered by the network.

[0044] The corresponding motor vehicle expediently has a corresponding vehicle-side communication interface for communicating with the network, which communication interface is also referred to as a wireless interface in the following text. In particular, the motor vehicle can receive and output communication signals by means of the vehicle-side wireless interface.

[0045] An embodiment is preferred in which at least two of the trigger devices, preferably the respective trigger device, have such a wireless communication interface. The charging system thus comprises at least two such zones, wherein the respective zone comprises at least one such group, preferably only one such group.

[0046] Preferred are embodiments in which at least one of the release devices, preferably the respective release device, uses only the wireless communication interface and thus the network generated by means of the wireless communication interface for detecting the approach of a motor vehicle.

[0047] The corresponding wireless network may be any type of such wireless network.

[0048] In a preferred embodiment, at least one of the at least one networks, preferably the corresponding network, is such a network according to the IEEE 802.11 standard, that is, preferably a WLAN. In particular, the wireless communication interface is a WLAN base station, for example a WLAN access point and / or a WLAN router. Therefore, in addition to the large covered area and therefore the large zone, the existing / released frequencies are used for the wireless communication interface and therefore for identifying the approach of the motor vehicle. Therefore, the charging system can be operated with fewer wireless interfaces and / or no special frequencies are required to identify the approach. Therefore, the charging system is cost-effective, simple and reliable at the same time. In addition, in this way, the interaction between the wireless network and the field generated by the energy coil and / or the transmitting coil is avoided or at least reduced. In this way, the susceptibility to interference is reduced and the reliability of the charging system is improved.

[0049] Furthermore, communication interfaces that conform to the IEEE 802.11 standard are available, for example in the form of corresponding chips, cost-effectively, so that the charging system is designed to be compact and cost-effective.

[0050] If at least two trigger devices each have such a wireless communication interface, then in the corresponding group the signal of the wireless network of the associated trigger device is stronger than the signal of the wireless network of the corresponding other trigger devices. The wireless communication interface is arranged and / or configured accordingly. In other words, at least some of the stationary inductive charging devices of the corresponding group, preferably all of the stationary inductive charging devices of the corresponding group, are assigned to those trigger devices with the strongest local wireless signal. This leads to an increased reliability of the charging system, in particular an increased reliability of the activation and deactivation of the stationary inductive charging devices.

[0051] An embodiment is considered to be advantageous in which at least one of the at least one wireless communication interface, preferably the respective wireless communication interface, is arranged centrally in the assigned group. This results in the assigned group being reliably covered by the wireless network, so that approaching motor vehicles from different directions can be reliably and easily detected. This also advantageously results in the assigned group being arranged centrally in the assigned zone. This in turn results in uniform, reliable and easy detection of approaching motor vehicles from different directions, in particular from all directions.

[0052] At least one of the at least one wireless communication interface, in particular a WLAN base station, such as a WLAN access point and / or a WLAN router, can be independent of the associated stationary inductive charging devices, in particular also spaced apart from these associated stationary inductive charging devices. This means in particular that the wireless communication interface is an independent component of the associated group.

[0053] It is conceivable that at least one of the at least one wireless communication interface, in particular a WLAN base station, such as a WLAN access point and / or a WLAN router, is arranged in one of the assigned stationary inductive charging devices. Since the stationary inductive charging device usually already has such a wireless communication interface, in particular a wireless communication interface according to the IEEE 802.11 standard, in order to communicate with a mobile inductive charging device, for example, no additional components are required to generate a network. In particular, the wireless communication interface is arranged in one of the stationary inductive charging devices arranged centrally in the assigned group. That is, therefore, the wireless communication interface is in particular an integrated component of the assigned stationary inductive charging device. This leads in particular to a simplified assembly of the charging system, in particular in the assigned parking lot. In addition, in this way, a group of stationary inductive charging devices can be arranged modularly one after the other, so that each group corresponds to a "module".

[0054] The corresponding activation interface can be designed in any desired manner.

[0055] It is conceivable that at least one of the at least one activation interface, in particular the respective activation interface, is a wireless interface. This reduces the assembly effort and the number of components of the charging system.

[0056] The following embodiment is preferred in which at least one of the at least one activation interface configured as a wireless interface is communicatively connected to the trigger device via a wireless network. Thus, the approach of the motor vehicle is not only detected by means of the wireless network, but also the corresponding positioning device is activated and / or deactivated.

[0057] In principle, the respective groups can be transferred to one another without interruption. It is therefore possible, in particular, to carry out a continuous activation and deactivation of mobile inductive charging devices of adjacent groups.

[0058] Advantageously, an area without stationary inductive charging devices, such as a roadway of an associated parking lot, is provided between at least two adjacent groups. This results in a clear differentiation of the groups, which leads to a correspondingly clear differentiation of the activation and deactivation of the locating devices respectively associated with the group. This results in improved operation of the charging system and reduced energy consumption. The latter leads to increased efficiency.

[0059] In principle, at least one stationary inductive charging device in the transition region between two groups can be assigned to both groups, wherein each group includes at least one other stationary inductive charging device that is not assigned to the second group. Assigning at least one stationary inductive charging device to both groups makes it possible, in particular, to enable continuous activation and deactivation of the stationary inductive charging devices of both groups.

[0060] Preferably, the respective stationary inductive charging device is assigned to a single group. This results in a clear differentiation of the groups, which leads to a correspondingly clear differentiation of the activation and deactivation of the locating devices respectively assigned to these groups. This results in improved operation of the charging system and reduced energy consumption, so that increased efficiency is also achieved.

[0061] It is conceivable that at least one of the stationary inductive charging devices has a bus system having an activation interface.

[0062] Alternatively or additionally, at least one of the stationary inductive charging devices can have a pin system with an activation interface.

[0063] Advantageously, the activation interface is arranged on the electronics of a specific stationary inductive charging device, thereby enabling a communication connection with an associated trigger device, thereby in particular being able to receive a signal as to whether the locating device should be activated and / or deactivated.

[0064] The electronics belonging to a stationary inductive charging device do not necessarily have to be arranged on the stationary inductive charging device, but can also be arranged remotely from the stationary inductive charging device, for example in a so-called "wallbox." That is, a communication connection with the associated locating device can be realized via the remotely arranged electronics, in particular via the wallbox.

[0065] It should be understood that in addition to the charging system, a parking lot system having a parking lot and a charging system also belongs to the scope of the present invention.

[0066] Further important features and advantages of the invention emerge from the dependent claims, the drawings and the associated description of the figures based on the drawings.

[0067] It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively stated combination but also in other combinations or alone without departing from the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Preferred exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar components or components having the same function.

[0069] The accompanying drawings schematically show:

[0070] Figure 1 shows a greatly simplified top view of a charging system with a stationary inductive charging device in a parking system,

[0071] Figure 2 shows a greatly simplified circuit diagram of a stationary inductive charger in charging operation,

[0072] Figure 3 shows a simplified cross section of a stationary inductive charging device,

[0073] Figure 4 A greatly simplified circuit diagram of a group of charging systems is shown. DETAILED DESCRIPTION

[0074] As exemplified in Figure 1 , 2 As shown in FIG4 , the charging system 1 is used for wireless energy transmission by means of induction. For this purpose, the charging system 1 has a plurality of stationary inductive charging devices 2 which are spaced apart from one another.

[0075] As from Figure 2 As can be seen in , the corresponding stationary inductive charging device 2 is used for wireless energy transmission with the motor vehicle 100 during charging operation. Therefore, during charging operation, the corresponding stationary inductive charging device 2 is the charging point of the charging system 1. For this purpose, the motor vehicle 100 has a mobile inductive charging device 101. During charging operation, the stationary inductive charging device 2 and the mobile inductive charging device 101 act inductively together for wireless energy transmission. For inductive energy transmission, the corresponding stationary inductive charging device 2 has a coil 3, which is also referred to as the stationary energy coil 3 below. For this purpose, the mobile inductive charging device 101 has a coil 102 that acts inductively together with the stationary energy coil 3, which is also referred to as the mobile energy coil 102 below. As can be seen from Figure 2As can be seen in , the energy coils 3, 102 used for wireless energy transmission need to be positioned relative to each other in such a way that the energy coils are inductively coupled. In order to improve the coupling between the energy coils 3, 102, and therefore to improve the efficiency, the energy coils 3, 102 need to be positioned relative to each other in an optimal manner so that optimal coupling is achieved. That is, in order to improve functionality and efficiency, the mobile inductive charging device 101 and therefore the motor vehicle 100 need to be positioned accordingly relative to the stationary inductive charging device 2. Here, the inductive charging devices 2, 101 are spaced apart from each other in the height direction R1. In addition, in order to enable charging operation and to achieve high efficiency during charging operation, the energy coils 3, 102 are positioned relative to each other transversely to the height direction R1, that is, in the longitudinal direction R2 extending transversely to the height direction R1 and in the transverse direction R3 extending transversely to the height direction R1 and transversely to the longitudinal direction R2. In order to perform the positioning, such as only in Figure 2 and 3 As shown in , the corresponding stationary inductive charging device 2 has a positioning device 4, which generates a positioning signal in a positioning operation for positioning the mobile inductive charging device 102 and thus the motor vehicle 100 relative to the stationary inductive charging device 2. In the exemplary embodiment shown, the corresponding positioning device 4 generates a magnetic positioning signal having at least one magnetic field. For this purpose, the positioning device 4 has at least one coil 5, which is also referred to as a transmitting coil 5 below. Furthermore, the motor vehicle 100, in the exemplary embodiment shown, the mobile inductive charging device 101 has a receiver 103 for receiving the positioning signal. Figure 2 In the exemplary embodiment shown, the receiver 103 has a coil 104, which is also referred to below as a receiving coil 104. In this case, a navigation command is generated with the aid of the received positioning signal, which is Figure 2 101 relative to each other. The evaluation of the positioning signal and the generation and output of the navigation command can be carried out by means of a control device 105 of motor vehicle 100. During the energy transmission, energy can be transmitted in particular to mobile inductive charging device 101 in order to charge battery 106 of motor vehicle 100. For this purpose, a rectifier 107 can be arranged between mobile power coil 102 and battery 106, which converts the voltage induced in mobile power coil 102 into a rectified voltage. Energy transmission from mobile inductive charging device 101 to stationary inductive charging device 2 can also be carried out.

[0076] As in Figure 1 As can be seen in FIG. 6 , stationary inductive charging devices 2 are divided into at least two groups 6 , wherein each group 6 includes at least two stationary inductive charging devices 2 . Figure 4 One of the groups 6 is shown. Figure 1 In FIG. 1 , purely by way of example, the corresponding group 6 comprises fourteen stationary inductive charging devices 2. Figure 4 In FIG. 6 , purely by way of example, a group 6 is shown comprising ten stationary inductive charging devices 2 .

[0077] Especially from Figure 4 As can also be seen in FIG. 1 , the corresponding stationary inductive charging device has an interface 7, by means of which the locating device 4 can be activated and deactivated. This interface 7 is also referred to below as activation interface 7. Figure 1 and 4 As can be seen in FIG. 1 , for each group 6, the charging system 1 has an associated device 8, which is designed in such a way that it detects the approach of the motor vehicle 100 to the associated group 6. The device 8 is also referred to as the trigger device 8 hereinafter. Figure 4 As shown, the corresponding trigger device 8 is connected in a communicative manner to the activation interface 7 of the stationary inductive charging device 2 of the assigned group 6. Here, when the trigger device recognizes that the motor vehicle 100 is approaching the assigned group 6, the trigger device 8 activates the positioning device 4 of at least an unoccupied stationary inductive charging device 2 of the assigned group 6, preferably only an unoccupied stationary inductive charging device 2, by means of the activation interface 7. The trigger device 8 is configured accordingly. Therefore, the positioning device 4 is not permanently activated. As a result, the energy consumption of the charging system 1 is reduced, and the efficiency of the charging system 1 is thus increased. At the same time, the inductive charging devices 2, 102 are positioned relative to each other in a simple and reliable manner by means of the positioning device 4, wherein the corresponding unoccupied stationary inductive charging device 2 of the group 6 is provided to the corresponding motor vehicle 100 and is available for use. This means that motor vehicle 100 can approach any of the unoccupied stationary inductive charging devices 2 for positioning by means of the stationary inductive charging device 2 , wherein motor vehicle 100 can be positioned in a simplified and precise manner by means of positioning device 4 .

[0078] exist Figure 1 For the sake of clarity, only four of the groups 6 are shown with associated release devices 8 .

[0079] Furthermore, respective trigger device 8 is designed such that it detects an absence state of assigned group 6, in which no motor vehicle 100 is located in group 6 or all motor vehicles 100 located in group 6 are in charging operation and no motor vehicle 100 is near group 6, wherein upon detecting the absence state, trigger device 8 deactivates locating device 4 of assigned group 6 by means of activation interface 7. Preferably, respective trigger device 8 is also designed such that it deactivates locating device 4 of stationary inductive charging device 2 of assigned group 6 when respective motor vehicle 100 located in group 6 is in charging operation.

[0080] like Figure 1 As shown, charging system 1 can be used in parking lot 200 and thus forms parking lot system 300 together with parking lot 200. Parking lot 200 includes a plurality of parking spaces 201, wherein respective parking spaces 201 are used to park motor vehicles 100. At least some of parking spaces 201 are provided with an associated stationary inductive charging device 2 of charging system 1. Figure 1 In the example shown, purely by way of example, the corresponding parking spaces 201 are provided with stationary inductive charging devices 2 of the charging system 1. Thus, a simulated grouping of parking spaces 201 is generated. Figure 2 As can be seen in , in the exemplary embodiment shown, stationary inductive charging device 2 is embedded in an associated parking space 201 .

[0081] As from Figure 1 As can be seen in the embodiment shown, between adjacent groups 6 there is provided an area 16 without stationary inductive charging devices 2, which is formed by lanes 202 of parking lot 200. Figure 1 As can also be seen in the example shown, in the exemplary embodiment shown, a respective stationary inductive charging device 2 is assigned to a single group of groups 6. This means that groups 6 do not share any stationary inductive charging device 2.

[0082] In the illustrated embodiment, the corresponding trigger device 8 has a wireless interface 9, which covers a zone 10 including the associated group 6 by means of a wireless network. This interface 9 is also referred to as communication interface 9 in the following. Figure 1 Only the four trigger devices 8 shown are shown with their assigned zones 10. Figure 1As can be seen in the embodiment shown, the corresponding group 6 is only arranged in the assigned zone 10. In the embodiment shown, the corresponding wireless communication interface 9 covers the assigned zone 10 by means of a wireless network according to the IEEE 802.11 standard. That is, the wireless communication interface 9 is in particular a WLAN base station 11 or a WLAN access point 12, in particular a WLAN router 13. The corresponding trigger device 8 communicates with the motor vehicle 100 by means of a wireless network. For this purpose, Figure 2 As shown, the corresponding motor vehicle 100 can have a corresponding wireless interface 108, which in particular emits and preferably also receives wireless signals for communication. The approach of the motor vehicle 100 is detected when the motor vehicle 100 communicates with the wireless communication interface 9, that is, in particular, enters the assigned zone 10. Likewise, the departure of the motor vehicle 100 from the assigned group 6 is detected when communication with the motor vehicle 100 is no longer possible, that is, when the motor vehicle 100 leaves the assigned zone 10.

[0083] like Figure 1 As shown, in the illustrated embodiment, in the corresponding group 6, the signal of the wireless network of the associated trigger device 8 is stronger than the signal of the wireless network of the corresponding other trigger devices 8. That is, the stationary inductive charging devices 2 of the corresponding group 6 are assigned to those trigger devices 8 with the strongest local wireless signal. Figure 1 As can be seen in the figure, in the illustrated embodiment, the corresponding zone 10 is spaced apart from the other groups 6. That is to say, in the illustrated embodiment, the corresponding zone 10 does not extend into the other groups 6. Figure 1 and 4 As shown, in the exemplary embodiment shown, the respective wireless communication interface 9 , in particular the respective trigger device 8 , is arranged centrally in the associated group 6 . Furthermore, the respective group 6 is situated centrally in the associated zone 10 .

[0084] As from Figure 1 and 4 As can be seen in the embodiment shown, the corresponding wireless communication interface 9 is independent of the associated stationary inductive charging device 2 and is spaced apart from these stationary inductive charging devices. Figure 4 As shown by the dashed line, at least one of the wireless communication interfaces 9 can also be arranged in one of the associated stationary inductive charging devices 2 of the associated group 6, i.e., be a component of the stationary inductive charging device 2. Figure 4 As shown, this is one of the centrally arranged stationary inductive charging devices 2 of group 6 .

[0085] like Figure 4As shown, at least one of the activation interfaces 7, in the embodiment shown, the corresponding activation interface 7 can be a wireless interface 14, so that activation is performed wirelessly and communication is performed with the associated trigger device 8. In the embodiment shown and preferably, the activation interface 7 configured as a wireless interface 14 is connected to the trigger device 7 in a communication manner by means of a wireless network.

[0086] As in Figure 2 As shown greatly simplified in FIG. 8 , at least one of stationary inductive charging devices 2 may also have a bus system 15 having an activation interface 7 .

[0087] In the exemplary embodiment shown, the stationary power coils 3 are respectively flat coils 17. In this case, for example, Figure 3 As can be seen in FIG. 1 , the stationary power coil 3 is wound around a winding axis A1 extending parallel to the height direction R1 .

[0088] As from Figure 2 and 3 As can be seen in FIG. 1 , the corresponding positioning device 4 has at least four transmitting coils 5, wherein Figure 2 Only two of the transmitting coils 5 can be seen in FIG. Figure 3 As can be seen in FIG. 1 , one of the transmitting coils 5 generates a magnetic field directed in the longitudinal direction R2. The transmitting coil 5 is also referred to below as the remote coil 18. Preferably, the longitudinal direction R2 is the driving direction of the motor vehicle 100, i.e., the X direction of the motor vehicle 100. In the illustrated embodiment, the remote coil 18 is wound around a winding axis A2 extending parallel to the longitudinal direction R1. As can be seen in FIG. 1 , the remote coil 18 is wound around a winding axis A2 extending parallel to the longitudinal direction R1. As can be seen in particular from FIG. Figure 3 As can also be seen in the embodiment shown, the stationary inductive charging device 2 has at least four further transmitting coils 5 which are offset from one another and each generate a magnetic field directed in the height direction R1. These transmitting coils 5 are also referred to below as short-range coils 19. Figure 3 In the embodiment shown, the positioning device 4 has a total of five such close-range coils 19. Figure 3 As can also be seen in FIG. 1 , the corresponding close-range coil 19 is designed as a flat coil 17 which is wound around a winding axis A3 extending parallel to the height direction R1. Figure 3 As can be seen from FIG. 5 , the transmitting coil 5 is different from the fixed energy coil 3. Figure 3As can also be seen in FIG. 1 , the short-distance coil 19 is smaller than the stationary power coil 3. The magnetic field generated by the long-distance coil 18 is preferably used for long-distance positioning, in particular for distances greater than 0.5 m, in particular between 1.5 m and 0.5 m. Preferably, the corresponding short-distance coil 19 is used for short-distance positioning, that is, in particular for distances less than 1.5 m, in particular less than 0.5 m.

Claims

1. A charging system (1), The charging system comprises a plurality of stationary inductive charging devices (2) which are spaced apart from each other. in, During charging operation, a corresponding stationary inductive charging device (2) inductively cooperates with a mobile inductive charging device (101) of a motor vehicle (100) for wireless energy transmission. The stationary inductive charging devices (2) are divided into at least two groups (6), and each group (6) includes at least two stationary inductive charging devices (2). The corresponding stationary inductive charging device (2) has a positioning device (4) which generates a positioning signal in a positioning operation for positioning a mobile inductive charging device (101) of a motor vehicle (100) relative to the stationary inductive charging device (2). The corresponding stationary inductive charging device (2) has an activation interface (7). The respective group (6) has an associated trigger device (8) which is connected in a communicative manner to an activation interface (7) of a stationary inductive charging device (2) of the associated group (6). A corresponding trigger device (8) is designed such that it detects an approach of a motor vehicle (100) to an associated group (6) and, when the approach is detected, at least partially activates a locating device (4) of at least an unoccupied stationary inductive charging device (2) of the associated group (6) by means of the activation interface (7).

2. The charging system according to claim 1, It is characterized in that The corresponding trigger device (8) is also designed in such a way that it detects an absence state of the assigned group (6), in which no motor vehicle (100) is located in the group or all motor vehicles (100) in the group are in charging operation and no motor vehicle (100) is close to the group (6), and when the absence state is detected, the positioning device (4) of the assigned group (6) is at least partially deactivated by means of the activation interface (7).

3. The charging system according to claim 1 or 2, It is characterized in that At least one of the trigger devices (8) has a wireless communication interface (9), which covers a zone (10) including the associated group (6) by means of a wireless network and communicates with the motor vehicle (100) by means of the network. When the motor vehicle (100) communicates with the wireless communication interface (9) via the network, the approach of the motor vehicle (100) is detected.

4. The charging system according to claim 3, It is characterized in that At least one of the at least one wireless communication interface (9), in particular a WLAN base station (11), covers an associated zone (10) by means of a wireless network according to the IEEE 802.11 standard.

5. The charging system according to claim 3 or 4, It is characterized in that At least two trigger devices (8) each have such a wireless communication interface (9), In the corresponding group (6), the signal of the wireless network of the associated trigger device (8) is stronger than the signal of the wireless network of the corresponding other trigger devices (8).

6. The charging system according to any one of claims 3 to 5, It is characterized in that At least one of the at least one wireless communication interface (9) is arranged centrally in the associated group (6).

7. A charging system according to any one of claims 3 to 6, It is characterized in that At least one of the at least one wireless communication interface (9) is independent of the associated stationary inductive charging device (2), in particular is also spaced apart from the associated stationary inductive charging device.

8. A charging system according to any one of claims 3 to 7, It is characterized in that At least one of the at least one wireless communication interface (9) is arranged in one of the associated stationary inductive charging devices (2).

9. The charging system according to any one of claims 1 to 8, It is characterized in that At least one of the activation interfaces (7) is a wireless interface (14).

10. A charging system according to claim 9 and any one of claims 3 to 8, It is characterized in that An activation interface (7) designed as a wireless interface (14) is communicatively connected to a trigger device (8) of an associated group (6) by means of the wireless network.

11. The charging system according to any one of claims 1 to 10, It is characterized in that At least one of the positioning devices (4) generates at least one magnetic positioning signal during operation.

12. The charging system according to any one of claims 1 to 11, It is characterized in that An area (16), in particular a roadway (202), which is free of stationary inductive charging devices (2) is arranged between at least two adjacent groups (6).

13. The charging system according to any one of claims 1 to 12, It is characterized in that The respective stationary inductive charging device (2) is assigned to a single group (6).

14. A charging system according to any one of claims 1 to 13, It is characterized in that At least one of the stationary inductive charging devices (2) has a bus system (15) having an activation interface (7).

15. A parking lot system (300), comprising a parking lot (1) and a charging system (1) according to any one of claims 1 to 14, wherein the parking lot has a plurality of parking spaces (201), wherein: A corresponding stationary inductive charging device (2) of the charging system (1) is arranged at an associated parking space (201).

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