DE102015225448A1 - Method for contactless charging of a battery in a motor vehicle - Google Patents

Abstract

Method for contactless charging of a battery (3) in a motor vehicle (2) comprising the steps of: generating an alternating magnetic field in a primary coil (6) of a stationary charging station (5), inducing an alternating current in a secondary coil (7) of a motor vehicle ( 2) with the alternating magnetic field generated in the charging station (5), charging the battery (3) of the motor vehicle (2) by means of the electrical energy of the alternating current induced in the secondary coil (7), wherein before the contactless charging of the battery (3) the motor vehicle (2) is identified wirelessly with respect to the charging station (5) by means of an address assigned to the motor vehicle (2), and the charging of the battery (3) with the charging station (5) is carried out only when the motor vehicle (2) is identified.

Description

The present invention relates to a method for contactless charging of a battery in a motor vehicle according to the preamble of claim 1 and a charging system for contactless charging of a battery in a motor vehicle according to the preamble of claim 12.

State of the art

Electrical energy storage devices are used in a variety of applications. In particular, in mobile applications z. B. batteries used as energy storage. For example, batteries are used in electric vehicles or hybrid vehicles as an energy storage to provide energy for the electric drive motor of the electric vehicle or hybrid vehicle. In order to use a battery as energy storage in a vehicle, an additional possibility for charging the battery must be provided.

Inductive charging stations are known in which energy is transmitted from the charging station to the motor vehicle wirelessly via an inductive coupling of two coils.

In the so-called inductive charging of electric vehicles necessary for the charging of the vehicle battery energy is not transmitted via a charging cable to the vehicle (conductive charging), but transmitted contactless via a transformer with a large air gap. In this case, the primary coil of the transformer is arranged in the stationary charging station and is connected by means of suitable electronics to the power grid. The charging station is embedded in the ground, for example, or designed as a charging station placed on the ground. The secondary coil of the transformer is typically fixedly mounted in the underbody of the vehicle and in turn connected by suitable electronics to the vehicle battery. For energy transfer, the primary coil generates a high-frequency alternating magnetic field, which penetrates the secondary coil and induces a corresponding alternating current there.

The charging stations can be arranged not only in the private garage for a motor vehicle, but also, for example, in publicly accessible facilities, such as parking garages or parking on a roadside. For the inductive charging an identification of the motor vehicle is necessary because the inductive charging is associated with costs and thus the inductive charging of the charging station can only be executed with a corresponding payment. In addition, it is necessary that in a plurality of charging stations for charging a motor vehicle, only one charging station is assigned to a motor vehicle and then only from this one associated charging station from the charging of the battery can be performed in the motor vehicle. These processes should be as comfortable as possible for the driver of the motor vehicle with a small effort for the driver of the motor vehicle.

The DE 10 2013 202 234 A1 shows a method for establishing a connection for transmitting energy on a transmission path between a first participant and a second participant, comprising the following steps: establishing an initial binding via a data communication path different from the transmission path, wherein a start signal for starting the initial binding is generated in that at least one parameter between the first subscriber and the second subscriber is transmitted via the data communication path by a communication unit, at least one parameter transmitted via the data communication path or information derived therefrom is stored by the second subscriber; Establishing a data communication connection via the transmission path, wherein at least one parameter is transmitted by the first subscriber via the transmission path, the first subscriber by the second subscriber due to an adjustment of the at least one parameter transmitted via the data communication path or information derived therefrom with at least one data transmitted over the data communication connection Parameter or derived information is authenticated; Establishing the connection for transmission of energy in the transmission path in response to a result of the authentication.

From the DE 10 2014 200 315 A1 A method for charging a battery in a vehicle is known, comprising the following steps: initializing a charging process, providing driver-specific data relating at least to travel destinations and travel times, determining a destination charge state as a function of the driver-specific data and charging the battery until reaching the destination charge state ,

Disclosure of the invention

Advantages of the invention

Inventive method for contactless charging of a battery in a motor vehicle with the steps: generating an alternating magnetic field in a primary coil of a stationary charging station, inducing an alternating current in a secondary coil of a motor vehicle with the magnetic alternating field generated in the charging station, charging the battery of the motor vehicle by means the electrical energy of the alternating current induced in the secondary coil, wherein before the contactless charging of the battery, the motor vehicle is identified wirelessly with respect to the charging station by means of an address assigned to the motor vehicle and the charging of the battery with the charging station is carried out only with an identification of the motor vehicle. Thus, initially a wireless, in particular radio-based, identification of the motor vehicle or of a driver of the motor vehicle takes place and only then is the charging of the battery carried out. An unintentional and unidentified motor vehicle can thus not be charged at the charging station. As a result, unauthorized persons for charging the battery of their motor vehicle can not charge their battery at the charging station. The identification of the motor vehicle takes place with an address which is assigned to the motor vehicle and / or the driver of the motor vehicle. The optional driver of the motor vehicle is considered as part of the motor vehicle.

In an additional embodiment, the motor vehicle is assigned a MAC address and / or IP address, and with the MAC address and / or IP address, the motor vehicle is identified by the MAC address and / or IP address of the motor vehicle to the Charging station is transmitted wirelessly. The wirelessly transmitted from the motor vehicle to the charging station address, in particular MAC address and / or IP address is checked, for example, due to a data connection of the charging station to the Internet and only after a corresponding release and / or authorization of this address is a loading of Battery of the motor vehicle executable. The data connection of the charging station to the Internet consists, for example, indirectly due to a data connection of the charging station with a computing unit and a data connection of the computing unit to the Internet.

In an additional embodiment, the charging station has a base data transmission device for wireless data transmission and the motor vehicle has a vehicle data transmission device for wireless data transmission and with the base data transmission device and vehicle data transmission device are data from the charging station to the motor vehicle and / or data from the motor vehicle transmitted to the charging station wirelessly. The base data transmission device and the vehicle data transmission device are necessary in order to be able to transmit data from the motor vehicle to the charging station and vice versa. The vehicle data transmission device can also at least partially not be permanently connected to the motor vehicle, for example in order to be able thereby to identify different drivers of the motor vehicle. The identification of the driver of the motor vehicle is thus also considered as an identification of the motor vehicle. An address of the motor vehicle or of the driver of the motor vehicle can also be stored in a mobile chip card with an RFID transponder. As a result, different drivers of the motor vehicle can identify accordingly at the charging station for authorization to charge the battery of the motor vehicle. The base data transmission device of the charging station can also be arranged a spatial distance to the primary coil of the charging station and / or the primary coil and the base data transmission device of the charging station are arranged in separate housings, however, the spatial distance of the primary coil to the base coil Data transmission device much smaller than the spatial distance of the primary coil to another charging station.

In a further embodiment, the method is carried out with a plurality of charging stations and before the contactless charging of the battery, the motor vehicle is assigned only one charging station and the charging of the battery of the motor vehicle is carried out only by the motor vehicle associated charging station. In a parking garage, therefore, several charging stations may be present for charging batteries of motor vehicles, which are parked in the parking garage.

In a supplementary embodiment, that charging station is assigned to the motor vehicle, which has the smallest distance to the motor vehicle. The smallest distance of the motor vehicle to a charging station can also be determined by means of a position determination of the motor vehicle. If, for example, three charging stations emit a signal and this signal is reflected by the motor vehicle, the spatial position of the motor vehicle can be determined on the basis of this reflected signal, since the position of the three charging stations which emit the signal is also known. From the position of the motor vehicle that charging station can be determined which has the smallest distance to the motor vehicle.

In an additional embodiment, the signals emitted by a respective vehicle data transmission device, in particular radio signals, are received at the plurality of charging stations and the signal strengths of the signals are compared with one another at the charging stations and that charging station is assigned to the motor vehicle which has the greatest signal strength. The determination of the charging station, which has the smallest or smallest distance to the motor vehicle, by means of the largest signal strength is technically particularly simple executable.

In an additional embodiment, the method is performed with multiple vehicles and each a charging station is assigned only ever a motor vehicle. In the case of a large number of charging stations and multiple motor vehicles, it is thus possible to associate only one motor vehicle per one charging station. This ensures that even with a large number of charging stations and motor vehicles from a charging station only one vehicle is charged.

In an additional embodiment, the charging of the battery in the motor vehicle is carried out only after an order for charging the battery wirelessly transmitted from the motor vehicle to the charging station. An order to charge the battery is required by the motor vehicle or the driver of the motor vehicle. Only with a corresponding order for charging the battery of the motor vehicle, the charging of the battery is performed. The battery charging job may also include charging the battery only to a certain state of charge (SOC). The order for charging the battery can be issued by the driver manually or automatically by an on-board electronics of the motor vehicle.

In a supplementary embodiment, the charging of the battery of the motor vehicle is only carried out if the motor vehicle has authorization to charge the battery of the motor vehicle, in particular electronic payment of the charge is carried out by the motor vehicle. The authorization to charge the battery requires in addition to the identification of the motor vehicle in particular the possibility and / or execution of an electronic payment for the loading of the motor vehicle. For this purpose, the electronic payment is either carried out before the charging process or it is checked before charging only the possibility of electronic payment and only after the completion of the charging an electronic payment of the store is executed, for example by due to the identification of the motor vehicle, the corresponding amount of money a credit card or bank account assigned to the motor vehicle is debited or confiscated. For this purpose, it is necessary that the motor vehicle or the driver of the motor vehicle previously creates this possibility by registering in the charging system for carrying out the method. However, this registration is necessary only once, so that then conveniently charging the battery of the motor vehicle can also be repeatedly performed.

In a supplementary embodiment, after identifying the motor vehicle and assigning each of a motor vehicle to a respective charging station, a predetermined period of time is waited for and, if during the predetermined time period no order for charging the battery is wirelessly transmitted from the motor vehicle to the associated charging station, this motor vehicle is released from the associated charging station, so that preferably subsequently to the associated shared charging station, the battery of another motor vehicle is rechargeable. In a parking garage motor vehicles can be turned off as electric vehicles, where there is no desire or need for charging the battery of the motor vehicle. For this reason, an identification of the motor vehicle nevertheless takes place and if, after the predetermined period of time, no order for charging the battery is transmitted wirelessly from the motor vehicle to the charging station, the assignment of the charging station to the motor vehicle is released again, so that the battery is again connected to the released charging station another motor vehicle can be charged.

In a supplementary embodiment, the at least one charging station, in particular all charging stations, is / are connected to a central processing unit and data is transmitted from the at least one charging station to the computing unit and / or from the computing unit to the at least one charging station and preferably to the computing unit the at least one charging station has a data connection to the Internet and / or the wireless data transmission is radio-based, preferably with WLAN or Bluetooth, and / or carried out by means of ultrasound and / or with light. Due to the data connection of the computing unit to the Internet, for example, a check of the authorization of an identified motor vehicle for charging the battery can be checked. Only with a corresponding registration in a charging system for carrying out the method and a possibility for electronic payment of the charging a charging of the battery of the motor vehicle is performed.

The invention further comprises a computer program with program code means which are stored on a computer-readable data carrier in order to carry out a method described in this patent application when the computer program is executed on a computer or a corresponding computing unit.

The invention also relates to a computer program product with program code means which are stored on a computer-readable data carrier in order to carry out a method described in this patent application when the computer program is executed on a computer or a corresponding computing unit.

Inventive charging system for contactless charging of a battery in a motor vehicle, comprising at least one charging station with a primary coil, a computing unit, a data connection means for data transmission from the at least one charging station to the computing unit and / or from the computing unit to the at least one charging station, the at least a charging station comprises a base data transmission device for wireless data transmission for the wireless transmission of data from the charging station to the motor vehicle and / or from the motor vehicle to the charging station.

It is expedient to carry out a method described in this patent application with the charging system.

In an additional embodiment, the charging system comprises a plurality of charging stations, which are arranged at a spatial distance from one another.

In an additional embodiment, the base data transmission device comprises an antenna and a transmitting unit and / or a receiving unit and / or the data connection means is formed by at least one data line or means for radio-based data transmission and / or the charging system comprises a motor vehicle with a secondary coil, one Battery and a vehicle data transmission device, in particular, the vehicle data transmission device comprises an antenna and a transmitting unit and / or a receiving unit.

In a further embodiment, the arithmetic unit and the charging station are connected to one another due to the data connection means to form a network. From the arithmetic unit so that, for example, data can be selectively transferred only to a charging station.

In a further embodiment, the base data transmission device comprises a WLAN module and / or a router for radio-based construction of a network.

In an additional embodiment, and / or each charging station is an address, in particular a MAC address and / or IP address and / or an SSID (Service Set Identifier), assigned to identify the charging station. Each charging station can thus form its own WLAN network with at least one vehicle; in the case of several vehicles which are each connected to a charging station to a WLAN network for data transmission, the vehicle with the smallest distance to the respective one charging station can thus be determined.

In a supplementary variant, the vehicle data transmission device comprises a WLAN module and / or a router for the radio-based construction of a network.

Preferably, the arithmetic unit also includes an access point.

In a further embodiment, the data transmission takes place from the at least one base data transmission device to the at least one vehicle data transmission device and preferably vice versa on the basis of TCP / IP (Transmission Control Protocol / Internet Protocol-based).

In an additional embodiment, the data transmission from the at least one base data transmission device or the at least one charging station to the arithmetic unit and preferably vice versa on TCP / IP basis (Transmission Control Protocol / Internet Protocol basis).

Expediently, the signals emitted by a respective vehicle data transmission device, in particular radio signals, are received at the plurality of charging stations and the signal strengths of the signals at the charging stations are compared with one another and the charging station is assigned to the motor vehicle which has the greatest signal strength and the largest signal strength RSSI (Received Signal Strength Indicator) is detected as an indicator of the reception strength in wireless data transmission.

In a further refinement, the signals received by the charging stations, which were transmitted by a respective vehicle data transmission device, are converted into data by the respective charging stations and the converted data are transmitted to the arithmetic unit and compared with one another in the arithmetic unit and the converted data contain data to the signal strength and / or data for identification of the vehicle, in particular the MAC address and / or the IP address of the vehicle.

Preferably, the assignment of a motor vehicle to a charging station is executed and / or controlled by the arithmetic unit.

In a further embodiment, the activation of the charging of the battery is controlled by the arithmetic unit.

In a further variant, the charging of the battery is controlled and / or regulated by the arithmetic unit.

In a further embodiment, identifying the motor vehicle of the Executed arithmetic unit by data from the charging station to the arithmetic unit are sent and the transmitted data are evaluated by the arithmetic unit.

Brief description of the drawings

In the following, an embodiment of the invention will be described in more detail with reference to the accompanying drawings. It shows:

1 a schematic representation of a charging system in a first embodiment,

2 a schematic representation of the charging system in a second embodiment and

3 a flowchart of a method according to the invention for contactless charging of a battery.

Embodiments of the invention

In 1 is a first embodiment of a charging system according to the invention 1 shown. A charging station 5 For example, it is permanently installed in the floor of a parking lot. The charging station 5 is connected to an electrical power system, not shown, and includes a primary coil 6 , and a basic data transmission device 12 , The basic data transmission device 12 includes an antenna 13 , a transmitting unit 14 and a receiving unit 15 as well as a router 16 , The electrical energy for the primary coil 6 is provided by the electric power supply, not shown. The charging station 5 is with a data connection agent 9 as a data line 10 or a radio connection to a central processing unit 8th connected. The central processing unit 8th also includes a router 16 and the central processing unit 8th also has a connection to the internet 11 on. In the area of the charging station 5 is a motor vehicle 2 as an electric vehicle 2 with a battery 3 as a high-voltage battery 3 and an electric motor 4 arranged. The battery 3 serves to supply the electric motor 4 with electrical energy and the electric motor 4 serves to drive the motor vehicle 2 , The car 2 includes a vehicle data transmission device 17 with an antenna 13 , a transmitting unit 14 and a receiving unit 15 , In the motor vehicle 2 is also a secondary coil 7 arranged.

By means of electrical energy from the electrical grid is from passing through the primary coil 6 conducted alternating current generates a magnetic alternating field and this alternating magnetic field generated in the secondary coil 7 of the motor vehicle 2 an alternating current. This alternating current is then rectified so that by means of the electrical energy in the secondary coil 7 induced AC the battery 3 can be loaded.

In 2 is a second embodiment of the charging system 1 shown. The second embodiment of the charging system 1 differs essentially only from the in 1 illustrated charging system 1 that the charging system 1 three charging stations 5 includes. At the in 2 illustrated charging system 1 can thus have one, two or three vehicles 2 be charged at the same time. In the following, the steps of a method according to the invention for charging the battery 3 ds motor vehicle 2 in the 2 illustrated embodiment of the charging system 1 described.

At the charging system 1 is initially not a motor vehicle 2 present (not shown). The charging stations 5 are arranged at three parking spaces of a public car park. The charging stations 5 are thus a first charging station LS1, a second charging station LS2 and a third charging station LS3. In the 2 illustrated motor vehicles 2 are thus a first motor vehicle FZ1 and a second motor vehicle FZ2. To charge the battery 3 of the motor vehicle FZ1 drives the motor vehicle FZ1 to the parking lot at the charging station LS1. During this drive of the motor vehicle FZ1 is constantly sending out 18 of radio signals from the motor vehicle FZ1, that is from the antenna 13 the vehicle data transmission device 17 of the first motor vehicle FZ1. These transmitted radio signals of the first motor vehicle FZ1 contain an address, that is, a MAC address as a hardware address of the motor vehicle 2 or a driver of the motor vehicle 2 and an IP address of the first motor vehicle FZ1. This radio signal emitted by the first motor vehicle FZ1 is received by all the charging stations LS1, LS2, LS3 19 and in the charging stations LS1, LS2, LS3, converting takes place 20 the received radio signal into a data signal passing through the data line 10 to the arithmetic unit 8th is transmitted, that is, there is a transfer 21 these data signals from the charging stations LS1, LS2, LS3 to the arithmetic unit 8th , In these data signals, both the data to the address of the first motor vehicle FZ1 and data on the signal strengths received from the respective charging stations LS1, LS2, LS3 are included. Subsequently, in the arithmetic unit 8th a comparison 22 of the signal strengths of the radio signals of only the first motor vehicle FZ1 carried out due to the address contained in the data signal and the signal strength, so that also an identifying 26 of the first motor vehicle FZ1 is executed. The radio signals from different motor vehicles 2 can be distinguished on the basis of the addresses sent out. Subsequently, a determination is made 23 the charging station LS1, LS2, LS3, which has received from the first motor vehicle FZ1 the radio signal with the largest signal strength. It is that motor vehicle 2 , which is the smallest distance to a charging station 5 having. In this case, the radio signal emitted by the first motor vehicle FZ1 points to the first charging station 1 the highest signal strength, thereby assigning 24 the first charging station LS1 takes place to the first vehicle FZ1. Subsequently, a transmission continues to take place 25 the MAC address and the IP address of the first motor vehicle FZ1 to the associated first charging station LS1 and a reservation and identification 26 the associated first charging station LS1 with respect to the first motor vehicle FZ1. Even with a simultaneous drive of the first motor vehicle FZ1 to the first charging station LS1 and the second motor vehicle FZ2 to the second charging station LS2, the first motor vehicle FZ1 assigned to the first charging station LS1 due to the transmitted from the first and second vehicles FZ1, FZ2 radio signals and the signal strengths and the second motor vehicle FZ2 be associated with the second charging station LS2. The steps from sending out 18 the radio signal from the first and second motor vehicle FZ1, FZ2 to all charging stations 5 and the corresponding reservation of the first charging station LS1 for the first vehicle 1 and the reservation of the second charging station LS2 for the second motor vehicle FZ2 can thus be carried out simultaneously.

Subsequently, the driver of the first motor vehicle FZ1 charges the battery 3 of the first motor vehicle FZ1 desired due to the low state of charge of the battery 3 in the first motor vehicle FZ1. For this reason, a wireless transmission 27 a job to charge the battery 3 of the first motor vehicle FZ1 to the associated first charging station LS1. Subsequently, a check 28 authorization to charge the battery 3 of the first motor vehicle FZ1 executed by the possibility of electronic payment by the first motor vehicle FZ1 and the driver of the first motor vehicle FZ1 is checked. It also becomes a driver of the motor vehicle 2 as part of the motor vehicle 2 scored. After a positive check of the authorization, a loading takes place 29 the battery 3 of the first motor vehicle FZ1 and after charging the battery 3 a termination occurs 30 charging the battery 3 of the first motor vehicle FZ1. The data of electrical energy to charge 29 the battery 3 of the first motor vehicle FZ1 is in the charging station 5 and / or the arithmetic unit 8th stored and then takes place according to this data, an electronic payment 31 charging the battery 3 in the first motor vehicle FZ1. Subsequently, a termination takes place 32 the assignment of the first motor vehicle FZ1 to the associated first charging station LS1. Subsequently, a release takes place 33 the first charging station LS1 assigned to the first motor vehicle FZ1 on the basis of the signal strength of the first motor vehicle 1 emitted radio signal. The release of the first charging station LS1 takes place only when the signal strength of the transmitted from the first motor vehicle FZ1 constant radio signal decreases again, that is, the first motor vehicle FZ1 has again removed from the first charging station LS1 by driving away.

The process steps from sending 18 until you send it 25 are carried out for the second motor vehicle FZ2 analogous to the second charging station LS2. After reserving and identifying 26 the assigned second charging station LS2 with respect to the second motor vehicle FZ2 is carried by the second motor vehicle FZ2 no sending an order to charge the battery 3 second motor vehicle FZ2, because the battery 3 of the second motor vehicle FZ2 has a sufficiently high state of charge. After reserving and identifying 26 of the second motor vehicle FZ2 is performed by the second charging station LS2 due to the data connection with the arithmetic unit 8th a wait within a predetermined period of time, for example 3 minutes. If during this predetermined period of time after reserving and identifying 26 no order to charge the battery 3 is sent to the second charging station LS2 of the second motor vehicle FZ2, a termination takes place 32 the assignment of the second motor vehicle FZ2 to the second charging station LS2. The release 33 The second charging station LS2 with respect to other motor vehicles takes place only when the signal strength of the second charging station LS2 previously assigned second motor vehicle FZ2 is below a predetermined threshold, that is, the second motor vehicle FZ2 has again removed from the parking lot at the second charging station LS2.

Overall, with the inventive method for contactless charging of the battery 3 of the motor vehicle 2 and the charging system according to the invention 1 significant benefits. The motor vehicles 2 become the individual charging stations 5 assigned and further can the motor vehicles 2 are identified only due to the transmitted radio signals between the charging stations 5 or the basic data transmission devices 12 in the charging stations 5 and the motor vehicles 2 or the vehicle data transmission devices 17 , Separate sensors for an assignment of motor vehicles 2 to charging stations 5 are therefore not necessary and thus incur low costs. The radio transmission takes place via a standardized 802.11 wireless network , Charging the battery 3 the motor vehicles 2 can thus for the driver of the motor vehicle 2 be carried out very comfortably. The identification takes place either firmly linked to the motor vehicle 2 and / or by being a driver of the motor vehicle 2 is identified and assigned accordingly, for example by means of an RFID transponder of the transportable by the driver of the motor vehicle 2 is carried. Deviating from this, the vehicle data transmission device 17 also be a transportable box, which by the driver of the motor vehicle 2 is carried. Due to the corresponding identification of the motor vehicle 2 or a driver of the motor vehicle 2 , which the motor vehicle 2 In this context, a simple electronic payment of the charging process can be carried out thereby. The elaborate setting up, for example, coin machines assigned to a respective charging station 5 is not necessary.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102013202234 A1 [0006]
• DE 102014200315 A1 [0007]

Cited non-patent literature

• standardized 802.11 WLAN network [0048]

Claims (15)

Method for contactless charging of a battery ( 3 ) in a motor vehicle ( 2 ) comprising the steps of: - generating an alternating magnetic field in a primary coil ( 6 ) of a stationary charging station ( 5 ), - inducing an alternating current in a secondary coil ( 7 ) of a motor vehicle ( 2 ) with the in the charging station ( 5 ) generated alternating magnetic field, - charging the battery ( 3 ) of the motor vehicle ( 2 ) by means of the electrical energy of the in the secondary coil ( 7 ) induced alternating current, characterized in that before contactless charging of the battery ( 3 ) the car ( 2 ) with regard to the charging station ( 5 ) wirelessly by means of a motor vehicle ( 2 ) and the charging of the battery ( 3 ) with the charging station ( 5 ) only with an identification of the motor vehicle ( 2 ) is performed. Method according to claim 1, characterized in that the motor vehicle ( 2 ) a MAC address and / or IP address is assigned and with the MAC address and / or IP address the motor vehicle ( 2 ) is identified by the MAC address and / or IP address of the motor vehicle ( 2 ) to the charging station ( 5 ) is transmitted wirelessly. Method according to claim 1 or 2, characterized in that the charging station ( 5 ) a basic data transmission device ( 12 ) for wireless data transmission and the motor vehicle ( 2 ) a vehicle data transmission device ( 17 ) for wireless data transmission and with the base data transmission device ( 12 ) and vehicle data transmission device ( 17 ) Data from the charging station ( 5 ) to the motor vehicle ( 2 ) and / or data from the motor vehicle ( 2 ) to the charging station ( 5 ) are transmitted wirelessly. Method according to one or more of claims 1 to 3, characterized in that the method with several charging stations ( 5 ) and before contactless charging of the battery ( 3 ) the car ( 2 ) only one charging station ( 5 ) and charging the battery ( 3 ) of the motor vehicle ( 2 ) only from the motor vehicle ( 2 ) associated charging station ( 5 ) is performed. Method according to claim 4, characterized in that the charging station ( 5 ) the motor vehicle ( 2 ), which is the smallest distance to the motor vehicle ( 2 ) having. Method according to claim 4 or 5, characterized in that each of a vehicle data transmission device ( 17 ) emitted signals, in particular radio signals, at the plurality of charging stations ( 5 ) and the signal strengths of the signals at the charging stations ( 5 ) and the charging station ( 5 ) the motor vehicle ( 2 ), which has the largest signal strength. Method according to one or more of claims 4 to 6, characterized in that the method with several motor vehicles ( 2 ) is carried out and each a charging station ( 5 ) only one motor vehicle each ( 2 ). Method according to one or more of the preceding claims, characterized in that the charging of the battery ( 3 ) in the motor vehicle ( 2 ) only after one of the motor vehicle ( 2 ) to the charging station ( 5 ) wirelessly transmitted order to charge the battery ( 3 ) is performed. Method according to one or more of the preceding claims, characterized in that the charging of the battery ( 3 ) of the motor vehicle ( 2 ) is executed only if the motor vehicle ( 2 ) have authorization to charge the battery ( 3 ) of the motor vehicle ( 2 ), in particular an electronic payment for the loading of the motor vehicle ( 2 ) is performed. Method according to claim 8 or 9, characterized in that after identifying the motor vehicle ( 2 ) and assigning each of a motor vehicle ( 2 ) each to a charging station ( 5 ) is waited for a predetermined period of time and if during the predetermined period of time no order to charge the battery ( 3 ) of the motor vehicle ( 2 ) to the assigned charging station ( 5 ) is transmitted wirelessly this motor vehicle ( 2 ) from the associated charging station ( 5 ) is released, so that preferably subsequently to the associated shared charging station ( 5 ) the battery ( 3 ) of another motor vehicle ( 2 ) is rechargeable. Method according to one or more of the preceding claims, characterized in that the at least one charging station ( 5 ), in particular all charging stations ( 5 ), with a central processing unit ( 8th ) and data from the at least one charging station ( 5 ) to the arithmetic unit ( 8th ) and / or from the arithmetic unit ( 8th ) to the at least one charging station ( 5 ) and the arithmetic unit ( 8th ) and preferably the at least one charging station ( 5 ) a data connection to the Internet ( 11 ) and / or the wireless data transmission is radio-based and / or carried out by means of ultrasound and / or with light. Charging system ( 1 ) for contactless charging of a battery ( 3 ) in a motor vehicle ( 2 ), full At least one charging station ( 5 ) with a primary coil ( 6 ), - a computing unit ( 8th ), - a data connection means ( 9 ) for data transmission from the at least one charging station ( 5 ) to the arithmetic unit ( 8th ) and / or from the arithmetic unit ( 8th ) to the at least one charging station ( 5 ), wherein the at least one charging station ( 5 ) a basic data transmission device ( 12 ) for wireless data transmission comprises for the wireless transmission of data from the charging station ( 5 ) to the motor vehicle ( 2 ) and / or of the motor vehicle ( 2 ) to the charging station ( 5 ). Charging system according to claim 12, characterized in that with the charging system ( 1 ) a method according to one or more of claims 1 to 11 is executable. Charging system according to claim 12 or 13, characterized in that the charging system ( 1 ) several charging stations ( 5 ), which are arranged at a spatial distance from each other. Charging system according to one or more of claims 12 to 15, characterized in that the basic data transmission device ( 12 ) an antenna ( 13 ) as well as a transmitting unit ( 14 ) and / or a receiving unit ( 15 ) and / or the data connection means ( 9 ) of at least one data line ( 10 ) is formed and / or the charging system ( 1 ) a motor vehicle ( 2 ) with a secondary coil ( 7 ), a battery ( 3 ) and a vehicle data transmission device ( 17 ), in particular the vehicle data transmission device ( 17 ) an antenna ( 13 ) as well as a transmitting unit ( 14 ) and / or a receiving unit ( 15 ).

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