Vehicle charging system for charging an energy storage device arranged in a vehicle

Abstract

The invention relates to a vehicle charging system for charging an energy store arranged in a vehicle F and to a method for operating such a vehicle charging system. The vehicle charging system according to the invention comprises: a first transmission unit (GPM) (101), which comprises a primary coil (103) having a coil axis (SPAP) and is arranged in particular stationary outside the vehicle; and a second transfer unit (CPM) (102) comprising a secondary coil (104) with a coil axis (SPAS) and arranged in the vehicle F, the energy transfer for charging the energy store being carried out by inductive energy transfer from the primary coil (103) to the secondary coil (104). The vehicle charging system is characterized in that the second transmission unit CPM (102) has a signal generator SG (105) for generating a signal SIGSG, which signal generator couples the signal SIGSG into the secondary coil (104) in order to emit the signal via the secondary coil (104), and the first transmission unit GPM (101) has an evaluation unit (106) and at least one first auxiliary coil (107a) having a coil axis SPAH1 and at least one second auxiliary coil (107b) having a coil axis SPAH2, the evaluation unit (106) being designed to evaluate the first auxiliary coil (107a) and the second auxiliary coil (107b). A magnetic coupling kmag and / or a relative position [Delta] POS between the first transmission unit GPM (101) and the second transmission unit CPM (102) is determined based on the signals SIGSG received by the primary coil (103) and the auxiliary coils (107a, b).

Description

Technical Field

[0001] The invention relates to a vehicle charging system for charging an energy storage device arranged in a vehicle, comprising: a first transmission unit GPM (English: G round P ad M odule), which includes a coil shaft SPA P and a primary coil and in particular is arranged stationarily outside the vehicle; and a second transmission unit CPM (English: C ar P ad M odule), which includes a coil shaft SPA S The invention relates to a method for operating such a vehicle charging system. Background Art

[0002] Such vehicle charging systems are known in the prior art. For reasons of safety and efficiency, the energy transfer for charging the energy storage device requires that the primary coil and the secondary coil, which are designed in particular as flat coils, have as little spacing as possible and are arranged as much on top of each other as possible. This achieves an optimized magnetic coupling between the primary coil and the secondary coil, which enables an optimized inductive energy transfer. Summary of the invention

[0003] The object of the present invention is to further improve such a vehicle charging system in such a way that a simultaneous, powerful and simple determination of the relative position between the first transmission unit GPM and the second transmission unit CPM or of variables derived therefrom and of the magnetic coupling between the primary coil and the secondary coil or of variables derived therefrom is possible.

[0004] The invention is derived from the features of the independent claims. Advantageous developments and embodiments are the subject matter of the dependent claims. Further features, possible applications and advantages of the invention are derived from the following description and from the explanation of the exemplary embodiments of the invention shown in the drawings.

[0005] A first aspect of the invention relates to a vehicle charging system for charging an energy storage device arranged in a vehicle F, comprising: a first transmission unit GPM comprising a coil shaft SPA P and a primary coil and in particular is arranged immovably outside the vehicle F; and a second transmission unit CPM, which comprises a coil shaft SPA Sand is arranged in a vehicle F, wherein energy transfer for charging the energy storage device takes place by inductive energy transfer from the primary coil to the secondary coil.

[0006] The vehicle charging system according to the invention is characterized in that the second transmission unit CPM has a function for generating the signal SIG SG The signal generator SG generates the signal SIG SG In order to output the signal via the secondary coil, the signal is coupled into the secondary coil, and the first transmission unit GPM has an evaluation unit and at least one coil axis SPA. H1 The first auxiliary coil and at least one auxiliary coil having a coil axis SPA H2 A second auxiliary coil, wherein the evaluation unit is configured to, based on a signal SIG received from the primary coil and the auxiliary coil SG To know the magnetic coupling k between the first transfer unit GPM and the second transfer unit CPM mag and / or the relative position ΔPOS and make it available at an interface for further use.

[0007] The vehicle F is in particular an electric vehicle or a hybrid vehicle with an electric drive and an internal combustion engine. The vehicle F is preferably designed and arranged in such a way that the longitudinal and / or lateral control of the vehicle F is autonomous and in conjunction with the currently known magnetic coupling k mag and / or the currently known relative position ΔPOS so that the first transfer unit GPM and the second transfer unit CPM are optimally arranged relative to each other before the inductive energy transfer from the primary coil to the secondary coil is initiated for charging the energy store. The energy store is advantageously a battery.

[0008] The interface is advantageously an interface of an evaluation unit. The interface is advantageously connected to a control unit of the first transmission unit GPM, which controls the process for the inductive energy transfer to the second transmission unit CPM. Furthermore, the interface is advantageously connected to a transmission unit, which is designed and arranged to wirelessly transmit the provided information to the second transmission unit CPM. For this purpose, the second transmission unit CPM has a corresponding receiving unit. Advantageously, both the transmitting unit of the first transmission unit GPM and the receiving unit of the second transmission unit CPM are designed as a transmitting / receiving unit.

[0009] Due to the signal SIG SG is coupled into the secondary coil, so that the secondary coil is used to emit the signal SIG SG The primary coil is used as a transmitting antenna (transmitting coil) and, on the other hand, as a receiving coil for receiving energy inductively transmitted from the primary coil for charging the energy storage device.

[0010] According to the invention, this dual function is also assigned to the primary coil. On the one hand, the primary coil is used to transfer energy for charging the energy storage device to the secondary coil, and on the other hand, the primary coil and the first and second auxiliary coils are used to receive the signal SIG emitted by the primary coil. SG The primary coil and the secondary coil are therefore dimensioned in such a way that an inductive transfer of energy for charging the energy store is possible.

[0011] The dual function of the primary coil and the secondary coil can save otherwise required receiving / transmitting coils. The proposed vehicle charging system makes it possible, in particular, to determine the relative position or distance and / or simultaneously determine the magnetic coupling and make it available for further applications.

[0012] The evaluation unit is designed and arranged according to the invention in such a way that, based on the signal SIG received from the primary coil and the auxiliary coil SG To know the magnetic coupling k between the first transfer unit GPM and the second transfer unit CPM mag and / or relative position ΔPOS.

[0013] Advantageously, at least the first auxiliary coil and the second auxiliary coil are arranged and / or oriented relative to the primary coil and relative to each other. Advantageously, there are a total of three, four, five or six auxiliary coils in order to receive the signal SIG SG In the present case, the auxiliary coils are positioned differently on the first transfer unit GPM. Furthermore, the auxiliary coils are advantageously oriented differently.

[0014] In a particularly preferred embodiment, the coil axis SPA H1 and SPA H2 substantially with the coil axis SPA of the primary coil P Oriented orthogonally and substantially orthogonally to one another. The term “substantially” in the present context means that deviations from pure orthogonality (90°) up to a range of 10°, ie 90°±10°, are also included.

[0015] Advantageously, the evaluation unit is designed and arranged to, based on the signal SIG received from the primary coil and the auxiliary coil SG The relative position ΔPOS is determined from the corresponding amplitude and / or phase of the primary coil and the secondary coil. Advantageously, the relative position ΔPOS describes the relative position of the primary coil and the secondary coil. In the evaluation unit, the distance between the primary coil and the secondary coil is also obtained from the relative position ΔPOS. The relative position ΔPOS is a two-dimensional relative position ΔPOS (Δx, Δy) or a three-dimensional relative position ΔPOS (Δx, Δy, Δz). The relative position can of course also be given in coordinates other than Cartesian coordinates.

[0016] Advantageously, the evaluation unit is based on a SG The voltage U2 generated in the secondary coil or the current I2 generated in the secondary coil is generated by the output, and the signal SIG is received in the primary coil. SG The magnetic coupling k is obtained by using the induced voltage U1 or induced current I1 and the preset self-inductance L1 and L2 of the primary coil and the secondary coil. mag .

[0017] Advantageously, the evaluation unit, in order to determine the magnetic coupling k mag Use the following relationship:

[0018] (1)

[0019] Advantageously, the first transfer unit GPM and the second transfer unit CPM are designed and arranged for wireless communication with one another. Advantageously, each of the transfer units comprises a transmitting / receiving unit for this purpose. Advantageously, a WLAN protocol is used for the wireless communication between the first transfer unit GPM and the second transfer unit CPM. Advantageously, the wireless communication connection is used in principle in order to exchange the required information between the first transfer unit GPM and the transfer unit CPM in order to safely and optimally implement the entire process for the energy transfer from the first transfer unit GPM to the second transfer unit CPM. Thus, for example, identifiers of CPM and GPM, status information of CPM and GPM, start and stop signals for starting and for terminating the energy transfer for charging the energy storage device, etc. are advantageously exchanged via the communication connection.

[0020] Advantageously, the signal SIG is currently transmitted via the communication connection from the second transmission unit CPM to the first transmission unit GPM. SG The voltage U2 or the current I2 generated in the secondary coil by the emission of the secondary coil is further advantageously transmitted via the communication connection from the second transmission unit CPM to the first transmission unit GPM.

[0021] Advantageously, the signal SIG is terminated by the second transfer unit CPM SG If the magnetic coupling k mag Greater than a predefined limit value G1. Advantageously, the limit value G1 is selected in such a way that an optimized magnetic coupling k is already present when the limit value G1 is exceeded. mag , which ensures effective inductive energy transfer. Advantageously, the signal SIG is terminated only when SG, ie, furthermore, the relative position ΔPOS does not change for the predefined time period Δt, so that it can be assumed that the vehicle F is parked in such a way that the first transfer unit GPM is arranged optimally for inductive energy transfer relative to the second transfer unit CPM.

[0022] Advantageously, the first transmission unit GPM uses the relative position ΔPOS determined by the evaluation unit or the distance D between the first and the second transmission unit determined by the evaluation unit from the relative position ΔPOS GPM-CPM to the second transmission unit CPM, wherein the distance D is only known from the relative position ΔPOS. GPM-CPM When the value is less than the preset boundary value G2, the second transmission unit CPM stops the signal SIG. SG Advantageously, the signal SIG is terminated only when SG , ie, furthermore, the relative position ΔPOS does not change for the predefined time period Δt, so that it can be assumed that the vehicle F is parked in such a way that the first transfer unit GPM is arranged optimally for inductive energy transfer relative to the second transfer unit CPM.

[0023] Termination signal SIG SG The issuance of the signal SIG is advantageously only carried out if it is ensured that an optimal positioning of the first transfer unit GPM relative to the second transfer unit CPM is achieved and the energy transfer for charging the energy storage device is initiated, because at the same time the signal SIG is issued. SG In the case of inductive energy transfer for charging the energy store, errors in the data communication cannot be ruled out.

[0024] Advantageously, the first transmission unit has a control unit which is designed and arranged such that when the (currently known) magnetic coupling k mag is greater than a predefined limit value G3 and / or when the distance D between the first transmission unit GPM and the second transmission unit CPM determined from the relative position ΔPOS GPM-CPM The energy transfer from the primary coil to the secondary coil for charging the energy storage device is initiated only when the threshold value G3 is less than the preset threshold value G4. The threshold value G3 is advantageously equal to or less than the threshold value G1. The threshold value G4 is advantageously equal to or greater than the threshold value G2.

[0025] Advantageously, the known magnetic coupling k is provided in the vehicle F via the communication connection already described. mag or the variables determined therefrom and / or the determined relative position ΔPOS or the variables determined therefrom, in particular the distance D between the first transmission unit GPM and the second transmission unit CPM GPM-CPM, in order in particular to output it in the vehicle F and / or to enable an automatic longitudinal and / or transverse control of the vehicle in order to optimize the positioning of the second transmission unit CPM on the first transmission unit.

[0026] A second aspect of the invention relates to a vehicle charging system for charging an energy storage device arranged in a vehicle F, comprising: a first transmission unit GPM, which comprises a coil shaft SPA P and a second transmission unit CPM, which comprises a primary coil having a coil axis SPA and is in particular arranged stationary outside the vehicle; S The vehicle charging system according to the second aspect of the invention is characterized in that the first transfer unit GPM has a secondary coil for generating a signal SIG SG The signal generator SG generates the signal SIG SG The second transmission unit CPM has an evaluation unit and at least one coil axis SPA, which is coupled into the primary coil for emitting the signal. H1 The first auxiliary coil and at least one auxiliary coil having a coil axis SPA H2 a second auxiliary coil of the secondary coil, wherein the evaluation unit is configured to, based on a signal SIG received from the secondary coil and the auxiliary coil SG To know the magnetic coupling k between the first transfer unit GPM and the second transfer unit CPM mag and / or the relative position ΔPOS and make it available at an interface for further use.

[0027] Unlike the vehicle charging system according to the first aspect of the present invention, in the vehicle charging system according to the second aspect of the present invention, the signal SIG is transmitted by the first transmission unit GPM. SG Therefore, in the vehicle charging system according to the second aspect, the second transfer unit CPM is equipped with an evaluation unit and at least one first and second auxiliary coil for receiving and for evaluating the signal SIG SG Advantageous developments of the vehicle charging system according to the second aspect and the advantages thereof are obtained by analogous and expedient adaptations of the above-described embodiments with respect to the first aspect of the invention, in particular as described below.

[0028] The interface is advantageously an interface of the evaluation unit. The interface is advantageously connected to a control unit of the second transmission unit CPM, which controls a process for receiving the energy inductively transmitted by the first transmission unit GPM. Furthermore, the interface is advantageously connected to a transmission unit, which is designed and arranged to transmit the provided information to the first transmission unit GPM. The transmission unit is advantageously designed as a transmission / reception unit.

[0029] Advantageously, the first auxiliary coil and the second auxiliary coil are arranged and oriented relative to the secondary coil and relative to each other. Advantageously, the coil axis SPA H1 and SPA H2 substantially with the coil axis SPA of the secondary coil P Advantageously, the evaluation unit is based on the signal SIG received by the secondary coil and the auxiliary coil. SG The corresponding amplitude and phase are used to obtain the relative position ΔPOS.

[0030] Advantageously, the evaluation unit is based on the signal SIG SG The voltage U1 generated in the primary coil or the current I1 generated in the primary coil is generated by the output, and the signal SIG is received in the secondary coil. SG The magnetic coupling k is obtained by using the induced voltage U2 or the induced current I2 and the preset self-inductance L1 and L2 of the primary coil and the secondary coil. mag .

[0031] Advantageously, the first transmission unit GPM will be for the signal SIG SG The voltage U1 or the current I1 generated in the primary coil by the first transmission unit GPM is transmitted to the second transmission unit CPM. Advantageously, the first transmission unit GPM transmits the self-inductance L1 of the primary coil to the second transmission unit CPM.

[0032] Advantageously, the first transmission unit GPM terminates the signal SIG SG If the magnetic coupling k mag If it is greater than the preset boundary value G1.

[0033] Advantageously, the second transmission unit CPM transmits the relative position ΔPOS or the distance D between the first and the second transmission unit known from the relative position ΔPOS to the second transmission unit CPM. GPM-CPM is transmitted to the first transmission unit GPM, wherein when the distance D known from the relative position ΔPOS GPM-CPM When the value is less than the preset boundary value G2, the first transmission unit GPM terminates the signal SIG SG issued.

[0034] A third aspect of the invention relates to a method for operating a vehicle charging system according to the first aspect of the invention for charging an energy storage device arranged in a vehicle F, the vehicle charging system comprising: a first transmission unit GPM comprising a coil shaft SPA P and a second transmission unit CPM, which comprises a primary coil having a coil shaft SPA and is in particular arranged stationary outside the vehicle; S and is arranged in a vehicle, wherein energy transfer for charging the energy storage device is performed by inductive energy transfer from the primary coil to the secondary coil, wherein the second transfer unit CPM has a signal SIG for generating SG The signal generator SG and the first transmission unit GPM have an evaluation unit and at least one coil axis SPA H1 The first auxiliary coil and at least one auxiliary coil having a coil axis SPA H2 The method comprises the following steps.

[0035] In a first step, a signal SIG is generated and coupled in by a signal generator SG. SG To the secondary coil for sending the signal.

[0036] In another step, based on the signal SIG received by the primary coil and the auxiliary coil SG To know the magnetic coupling k between the first transfer unit GPM and the second transfer unit CPM mag and relative position ΔPOS, and provides magnetic coupling k mag and / or the relative position ΔPOS to an interface for further application.

[0037] Advantageous developments of the method for operating a vehicle charging system according to the first aspect of the invention and the advantages thereof are achieved by analogously and expediently rewriting the embodiments of the first aspect of the invention to the method according to the third aspect of the invention, in particular as described below.

[0038] Advantageously, the first auxiliary coil and the second auxiliary coil are arranged and oriented relative to the primary coil and relative to each other. Advantageously, the coil axis SPA H1 and SPA H2 substantially with the coil axis SPA of the primary coil P Advantageously, the evaluation unit is based on the signal SIG received by the primary coil and the auxiliary coil. SGThe relative position ΔPOS is determined by the corresponding amplitude and phase of the signal SIG. Advantageously, the relative position ΔPOS describes the relative position of the primary coil and the secondary coil. Advantageously, the relative position ΔPOS is a two-dimensional relative position ΔPOS (Δx, Δy) or a three-dimensional relative position ΔPOS (Δx, Δy, Δz). Advantageously, the evaluation unit is based on the signal SIG. SG The voltage U2 generated in the secondary coil or the current I2 generated in the secondary coil is generated by the output, and the signal SIG is received in the primary coil. SG The magnetic coupling k is obtained by using the induced voltage U1 or induced current I1 and the preset self-inductance L1 and L2 of the primary coil and the secondary coil. mag .

[0039] Advantageously, the second transfer unit CPM will be for the signal SIG SG The voltage U2 or the current I2 generated in the secondary coil by the output is transmitted to the first transmission unit GPM. Advantageously, the second transmission unit CPM transmits the self-inductance L2 of the secondary coil to the first transmission unit GPM. Advantageously, the second transmission unit CPM terminates the signal SIG SG If the magnetic coupling k mag If it is greater than the preset boundary value G1.

[0040] Advantageously, the first transmission unit GPM transmits the relative position ΔPOS or the distance D between the first and the second transmission unit known from the relative position ΔPOS to the first transmission unit. GPM-CPM is transmitted to the second transmission unit CPM, wherein when the distance D known from the relative position ΔPOS GPM-CPM When the value is less than the preset boundary value G2, the second transmission unit CPM terminates SIG SG issued.

[0041] Advantageously, when the known magnetic coupling k mag When the relative position ΔPOS is greater than a preset limit value G3 and / or when the distance D between the first transmission unit GPM and the second transmission unit CPM determined from the relative position ΔPOS GPM-CPM When the voltage is less than a preset limit value G4, energy transfer from the primary coil to the secondary coil for charging the energy storage device is initiated.

[0042] A fourth aspect of the invention relates to a method for operating a vehicle charging system according to the second aspect of the invention for charging an energy storage device arranged in a vehicle F, the vehicle charging system comprising: a first transmission unit GPM comprising a coil shaft SPA P and a second transmission unit CPM, which comprises a primary coil having a coil shaft SPA and is in particular arranged stationary outside the vehicle;S and is arranged in a vehicle, wherein energy transfer for charging the energy storage device is performed by inductive energy transfer from the primary coil to the secondary coil, wherein the first transfer unit GPM has a signal SIG for generating SG The signal generator SG and the second transmission unit CPM have an evaluation unit and at least one coil axis SPA H1 The first auxiliary coil and at least one auxiliary coil having a coil axis SPA H2 The method comprises the following steps.

[0043] In a first step, a signal SIG is generated and coupled in by a signal generator SG. SG to the primary coil for sending the signal.

[0044] In another step, based on the signal SIG received by the secondary coil and the auxiliary coil SG To know the magnetic coupling k between the first transfer unit GPM and the second transfer unit CPM mag and / or relative position ΔPOS, and provide magnetic coupling k mag and / or the relative position ΔPOS to an interface for further application.

[0045] Advantageous developments of the method for operating a vehicle charging system according to the second aspect of the invention (fourth aspect of the invention) and the advantages thereof are achieved by analogously and expediently adapting the embodiments of the second aspect of the invention to the method, in particular as described below.

[0046] Advantageously, the first auxiliary coil and the second auxiliary coil are arranged and oriented relative to the secondary coil and relative to each other. Advantageously, the coil axis SPA H1 and SPA H2 substantially with the coil axis SPA of the secondary coil P Advantageously, the evaluation unit is based on the signal SIG received by the secondary coil and the auxiliary coil. SG The corresponding amplitude and phase are used to obtain the relative position ΔPOS.

[0047] Advantageously, the evaluation unit is based on the signal SIG SG The voltage U1 generated in the primary coil or the current I1 generated in the primary coil is generated by the output, and the signal SIG is received in the secondary coil. SG The magnetic coupling k is obtained by using the induced voltage U2 or the induced current I2 and the preset self-inductance L1 and L2 of the primary coil and the secondary coil. mag .

[0048] Advantageously, the first transmission unit GPM will be for the signal SIG SG The voltage U1 or the current I1 generated in the primary coil by the first transmission unit GPM is transmitted to the second transmission unit CPM. Advantageously, the first transmission unit GPM transmits the self-inductance L1 of the primary coil to the second transmission unit CPM.

[0049] Advantageously, the first transmission unit GPM terminates the signal SIG SG If the magnetic coupling k mag Advantageously, the second transmission unit CPM transmits the relative position ΔPOS or the distance D between the first and second transmission units known from the relative position ΔPOS to the first transmission unit CPM. GPM-CPM is transmitted to the first transmission unit GPM, wherein when the distance D known from the relative position ΔPOS GPM-CPM When the value G2 is less than the preset boundary value, the first transmission unit GPM terminates SIG SG issued. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Further advantages, features and details are apparent from the following description, in which—if necessary with reference to the drawings—at least one exemplary embodiment is described in detail. Identical, similar and / or functionally identical components are provided with the same reference numerals.

[0051] in:

[0052] Figure 1 shows a schematic structure of a vehicle charging system according to the present invention; and

[0053] Figure 2 A highly schematic flow chart of the method according to the invention for operating a vehicle charging system is shown. DETAILED DESCRIPTION

[0054] Figure 1 A highly schematic structure of a vehicle charging system according to the invention is shown, which serves to charge an energy storage device arranged in a vehicle F. Figure 1 The vehicle charging system shown in FIG. 1 comprises a first transmission unit GPM101 including a coil shaft SPA. P The vehicle charging system further comprises a primary coil 103 (not shown) and is arranged outside the vehicle on the ground in a fixed manner. The vehicle charging system further comprises a second transfer unit CPM102, which comprises a coil axis SPA S (not shown) and is arranged in the vehicle F. Energy is transferred from the primary coil 103 to the secondary coil 104 for charging the energy store by inductive energy transfer.

[0055] For the sake of overview, all components present in second transfer unit 102 that are associated with the emission and reception of inductive charging energy for the energy storage device are listed in the table below. Figure 1 was removed.

[0056] Before the inductive energy transfer in the first transfer unit GPM can be started / activated, the presence of the second transfer unit CPM in the vehicle F, its relative position and the current magnetic coupling between the first transfer unit GPM and the second transfer unit CPM must first be known, wherein the known relative position ΔPOS and the known magnetic coupling k mag When the preset conditions are met, inductive energy transfer is initiated.

[0057] The transmission unit CPM102 arranged in the vehicle F has a function for generating a signal SIG SG The signal generator SG105 generates a signal SIG in order to send a signal through the secondary coil 104. SG In addition, the signal generator SG105 is currently connected to the transmission / reception unit 109, which transmits the following information via WLAN: the identification of the second transmission unit CPM102; the electrical state of the transmission unit CPM102; the signal generator SG105 is connected to the transmission / reception unit 109, which transmits the following information via WLAN: the identification of the second transmission unit CPM102; the electrical state of the transmission unit CPM102; the signal SIG SG The voltage U2 or current I2 generated by the secondary coil 104 and the inductance L2 of the secondary coil 104. The dashed arrow from the secondary coil 104 represents the signal SIG SG .

[0058] The sending / receiving unit 109 of the second transmission unit CPM102 is also connected to a vehicle-side control unit 110 which, in particular, controls an autonomous longitudinal and / or lateral control of the vehicle F and / or controls the output / display of information in the vehicle F in order to optimize the relative positioning of the first transmission unit GPM101 relative to the second transmission unit CPM102.

[0059] The first transmission unit GPM101 has an evaluation unit 106 and at least one coil axis SPA H1 The first auxiliary coil 107a (not shown) and at least one having a coil axis SPA H2 (not shown) The second auxiliary coil 107b. Coil axis SPA H1 and SPA H2 substantially with the coil axis SPA of the primary coil P Oriented orthogonally and substantially orthogonally to each other.

[0060] The evaluation unit 106 is configured to determine, based on the signal SIG received from the primary coil 103 and the auxiliary coils 107a, b)SG To know the current magnetic coupling k between the first transfer unit GPM101 and the second transfer unit CPM102 mag and the current relative position ΔPOS. The evaluation unit 106 is connected to the transmitting / receiving unit 108 so that the magnetic coupling k mag and the value determined for the relative position ΔPOS and the distance D between the first and second transmission units determined therefrom GPM-CPM Specifically, it is transmitted to the second transmission unit CPM102 via the data connection between the transmitting / receiving units 108 and 109. mag The data is transmitted by the sending / receiving unit 109 to the control unit 110 on the vehicle side and is used by the control unit for autonomous longitudinal and lateral control of the vehicle F, so that the vehicle F autonomously performs optimal positioning of the second transmission unit CPM102 relative to the first transmission unit GPM101.

[0061] If such an optimized positioning is performed, this can be achieved according to the preset boundary values, especially for the magnetic coupling k mag If it is detected that the vehicle F has been placed in a parking state, so that no further movement of the vehicle F can be expected, an inductive energy transfer for charging the vehicle-side energy storage device is initiated.

[0062] Figure 2 shows the operation for Figure 1 A schematic flow chart of the method according to the invention for a vehicle charging system described in FIG.

[0063] In a first step 201, a signal SIG is generated and coupled in by a signal generator SG105. SG To the secondary coil 104 for sending the signal.

[0064] In a further step 202, based on the signal SIG received by the primary coil 103 and the auxiliary coils 107a, b SG To know the magnetic coupling k between the first transfer unit GPM101 and the second transfer unit CPM102 mag and / or relative position ΔPOS.

[0065] In another step 203, the known magnetic coupling k mag and the relative position ΔPOS and the distance D between the first and second transmission units derived therefrom GPM-CPMThe data are transmitted to the second transmission unit CPM102. The transmission of these data takes place between the transmitting unit 108 and the receiving unit 109. The data transmission is carried out by means of the WLAN protocol. The transmitted data are used for further guidance to the vehicle-side control unit 110 for autonomous lateral and / or longitudinal control of the vehicle F or for outputting / displaying the information in the vehicle.

[0066] In a further step S204, it is checked whether the magnetic coupling k mag and the relative position ΔPOS and the distance D GPM-CPM Whether the corresponding preset conditions are met. This check can be performed not only in the first transfer unit GPM101, but also in the second transfer unit CPM102. Only when the preset conditions are met, the inductive energy transfer from the primary coil to the primary coil is initiated.

[0067] In the current embodiment, the signal SIG SG The emission, reception and evaluation of k are continued during the inductive energy transfer for charging the energy storage device. mag , relative position ΔPOS or spacing D GPM-CPM If the change in does not meet the preset conditions, the inductive energy transfer for charging the energy storage device is immediately stopped.

[0068] Although the present invention has been illustrated and described in more detail by preferred embodiments, the present invention is not limited to the disclosed examples, and those skilled in the art may derive other variations therefrom without departing from the scope of protection of the present invention. It is therefore apparent that there are many variations possible. It is also clear that the exemplary embodiments mentioned are in fact only examples, which should not be interpreted in any way as limitations on, for example, the scope of protection, application possibilities or configuration of the present invention. Specifically, the foregoing description and the accompanying drawings enable those skilled in the art to specifically transform these exemplary embodiments, wherein those skilled in the art may make various changes, such as regarding the functions or arrangements of the various elements mentioned in the exemplary embodiments, without departing from the scope of protection defined by the claims and their legal equivalents, such as further descriptions in the specification.

[0069] Reference numerals list

[0070] 101 First Transfer Unit GPM

[0071] 102 Second Delivery Unit CPM

[0072] 103 Primary coil

[0073] 104 Secondary coil

[0074] 105 Signal Generator SG

[0075] 106 evaluation units

[0076] 107a First auxiliary coil

[0077] 107b Second auxiliary coil

[0078] 108, 109 Transmitting / receiving unit for data communication

[0079] 110 Vehicle side control equipment

[0080] 201-204 Method Steps

Claims

1. A vehicle charging system for charging an energy storage device arranged in a vehicle F, the vehicle charging system comprising: The first transmission unit GPM (101) comprises a coil shaft SPA P A primary coil (103) and in particular arranged immovably outside the vehicle; and a second transmission unit CPM (102) comprising a coil axis SPA S The secondary coil (104) is arranged in the vehicle F, wherein the energy transfer for charging the energy storage device is performed by inductive energy transfer from the primary coil (103) to the secondary coil (104), characterized in that: The second transfer unit CPM (102) has a function of generating a signal SIG SG The signal generator SG (105) generates the signal SIG SG coupled into the secondary coil to emit the signal through the secondary coil (104), and The first transmission unit GPM (101) comprises an evaluation unit (106), at least one coil axis SPA H1 The first auxiliary coil (107a) and at least one coil having a coil axis SPA H2 The evaluation unit (106) is configured to, based on a signal SIG received from the primary coil (103) and the auxiliary coils (107a, b), SG To determine the magnetic coupling k between the first transfer unit GPM (101) and the second transfer unit CPM (102) mag and / or relative position ΔPOS.

2. The vehicle charging system according to claim 1, wherein: The first auxiliary coil (107a) and the second auxiliary coil (107b) are arranged and oriented relative to the primary coil (103) and relative to each other.

3. The vehicle charging system according to claim 1 or 2, wherein: The coil axis SPA H1 and the coil axis SPA H2 are substantially aligned with the coil axis SPA of the primary coil (103) P Oriented orthogonally and substantially orthogonally to each other.

4. The vehicle charging system according to any one of claims 1 to 3, wherein: The evaluation unit (106) is based on a signal SIG received by the primary coil (103) and the auxiliary coil (107a, b) SG The relative position ΔPOS is determined by the corresponding amplitude and / or phase.

5. The vehicle charging system according to any one of claims 1 to 4, wherein: Based on the signal SIG SG The voltage U2 generated in the secondary coil (104) or the current I2 generated in the secondary coil (104) by the emission of the signal SIG, and the current I2 generated in the primary coil (103) when the signal SIG is received SG The evaluation unit (106) determines the magnetic coupling k based on the induced voltage U1 or the induced current I1 and the preset self-inductances L1 and L2 of the primary coil (103) and the secondary coil (104). mag .

6. The vehicle charging system according to any one of claims 1 to 5, wherein: The second transfer unit CPM (102) is implemented and configured to, when the magnetic coupling k mag When the relative position ΔPOS determines the distance D between the first transmission unit and the second transmission unit, the distance D between the first transmission unit and the second transmission unit is greater than a preset limit value G1 and / or when the relative position ΔPOS determines the distance D between the first transmission unit and the second transmission unit. GPM-CPM When the value is less than the preset boundary value G2, the termination signal SIG SG issued.

7. The vehicle charging system according to any one of claims 1 to 6, wherein: Only if the magnetic coupling k is determined mag is greater than a preset limit value G3 and / or only when the distance D between the first transfer unit GPM (101) and the second transfer unit CPM (102) determined by the relative position ΔPOS GPM-CPM When the current is less than a preset limit value G4, the energy transfer from the primary coil (103) to the secondary coil (104) for charging the energy storage device is initiated.

8. A method for operating a vehicle charging system according to any one of claims 1 to 7, comprising the following steps: - generating and coupling in (201) a signal SIG via the signal generator SG (105) SG to the secondary coil (104) for sending the signal; and - based on the signal SIG received by the primary coil (103) and the auxiliary coil (107a, b) SG To determine the magnetic coupling k between the first transfer unit GPM (101) and the second transfer unit CPM (102) mag and / or relative position ΔPOS.

9. A vehicle charging system for charging an energy storage device arranged in a vehicle F, the vehicle charging system comprising: The first transmission unit GPM (101) comprises a coil shaft SPA P A primary coil (103) and in particular is arranged immovably outside the vehicle; and a second transmission unit CPM (102), which comprises a coil axis SPA S The secondary coil (104) is arranged in the vehicle, wherein the energy transfer for charging the energy storage device is performed by inductive energy transfer from the primary coil (103) to the secondary coil, characterized in that The first transfer unit CPM (101) has a function of generating a signal SIG SG The signal generator SG (105) generates the signal SIG SG coupled into the primary coil (103) for sending the signal, and The second transmission unit CPM (102) comprises an evaluation unit (106), at least one coil axis SPA H1 The first auxiliary coil (107a) and at least one coil having a coil axis SPA H2 The evaluation unit (106) is configured to, based on a signal SIG received from the secondary coil (104) and the auxiliary coils (107a, b), SG To determine the magnetic coupling k between the first transfer unit GPM (101) and the second transfer unit CPM (102) mag and / or the relative position ΔPOS and make it available at an interface for further use.

10. A method for operating a vehicle charging system according to claim 9, comprising the following steps: - generating and coupling in (201) a signal SIG via the signal generator SG (105) SG to the primary coil (103) for sending the signal; and - based on a signal SIG received by the secondary coil (104) and the auxiliary coil (107a, b) SG To determine the magnetic coupling k between the first transfer unit GPM (101) and the second transfer unit CPM (102) mag and / or relative position ΔPOS.

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