Inductive charging system for vehicle
By using an antenna arrangement based on a self-organizing radio network in the inductive charging system, the problem of inaccurate relative position determination between the vehicle module and the ground module was solved, achieving more efficient inductive energy transfer and position determination.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BRUSA ELEKTRONIK AG
- Filing Date
- 2024-10-11
- Publication Date
- 2026-05-01
AI Technical Summary
In the existing technology, the relative position determination between the vehicle module and the ground module is not accurate enough during the inductive energy transfer process, resulting in large transmission losses and inaccurate position determination.
The antenna arrangement adopts a self-organizing radio network, which forms a self-organizing radio network by setting multiple antennas outside the main coil for data and signal communication, and is used to determine the relative position of the vehicle module with respect to the ground module.
It improves the accuracy of data and signal communication during inductive energy transfer, reduces transmission loss, and improves the accuracy of relative position determination.
Smart Images
Figure CN121969518A_ABST
Abstract
Description
[0001] This invention relates to an inductive charging system for a vehicle, comprising a vehicle module (CPM) and a ground module (GPM), wherein the ground module (GPM) has a first main coil and the vehicle module (CPM) has a second main coil, and the ground module (GPM) and the vehicle module (CPM) are designed and configured to inductively transfer energy from the ground module (GPM) to the vehicle module (CPM) and / or vice versa.
[0002] To achieve optimal inductive energy transfer, the second main coil of the vehicle module CPM needs to be positioned relative to the first main coil of the ground module GPM so that the two main coils achieve the highest possible inductive coupling with the lowest possible leakage flux.
[0003] Positioning of the vehicle module CPM above the stationary ground module GPM is typically achieved using a positioning system. This positioning system controls the vehicle or its movement, or at least issues corresponding control commands to the vehicle's driver, based on the determination of the CPM's current relative position with respect to the GPM.
[0004] The object of the present invention is to provide an inductive charging system for vehicles that enables improved determination of the current relative position of CPM with respect to GPM, particularly during inductive energy transfer.
[0005] This invention is derived from the features of the independent claims. Advantageous improvements and embodiments are the subject of the dependent claims. Other features, possible applications, and advantages of the invention will become apparent from the following description and from the discussion of exemplary embodiments of the invention depicted in the accompanying drawings.
[0006] This objective is achieved by an inductive charging system for vehicles, comprising a vehicle module CPM and a ground module GPM, wherein the ground module GPM has a first main coil and the vehicle module CPM has a second main coil, and the ground module GPM and the vehicle module CPM are designed and configured to inductively transfer energy from the ground module GPM to the vehicle module CPM and / or vice versa.
[0007] The proposed inductive charging system is characterized in that: the ground module GPM has a first transceiver unit with at least one first antenna for data and / or signal communication with the vehicle module CPM, particularly for location data communication; the vehicle module CPM has a second transceiver unit with at least one second antenna for data and / or signal communication with the ground module GPM, particularly for location data communication; the first antenna is arranged outside the first main coil of the ground module GPM; the second antenna is arranged outside the second main coil of the vehicle module CPM; and the at least one first antenna and the at least one second antenna are configured and designed to form a self-organizing radio network (as corresponding radio network nodes).
[0008] The first transceiver unit and the second transceiver unit are advantageously used only for data communication and / or signal communication between CPM and GPM.
[0009] Advantageously, the ground module GPM has a plurality of first antennas for data communication and / or signal communication, the plurality of first antennas being arranged outside the first main coil.
[0010] Advantageously, the vehicle module CPM has a plurality of second antennas for data communication and / or signal communication, the plurality of second antennas being arranged outside the second main coil.
[0011] Advantageously, the vehicle module CPM has a positioning system that determines the relative position of the second main coil of the vehicle module CPM with respect to the first main coil of the ground module GPM based on data communication and / or signal communication between the GPM and the CPM via the first antenna and the second antenna, or vice versa.
[0012] Advantageously, the positioning system has an interface at which the currently determined relative position of the ground module GPM relative to the vehicle module CPM is provided, or the currently determined relative position of the first master coil relative to the second master coil is provided.
[0013] The term "outside the first / second main coil" in this case means that the first or second main coil is not located in the region of the coil core of the respective main coil, and is also not located above and / or below the coil core (in the direction of the coil axis). It is also advantageous if the first or second main coil is not arranged above and / or below the coil winding (in the direction of the coil axis).
[0014] The term “self-organizing radio network” is understood herein to mean a radio network having radio nodes and radio links, wherein the radio nodes form a mesh network that automatically establishes and configures itself.
[0015] The proposed positioning of the first and second antennas outside their respective main coils reduces transmission losses in data and / or signal communication between the GPM and CPM, especially during induced energy transfer between the main coils of the GPM and CPM, and improves the accuracy of determining the relative positions of the GPM and CPM.
[0016] In a further improvement, the first antenna in the ground module GPM is positioned outside the first main coil. In a further improvement, the second antenna in the vehicle module CPM is positioned outside the second main coil.
[0017] In an advantageous improvement, at least one of the plurality of first antennas of the ground module GPM is fixedly arranged outside the ground module GPM, having a known relative position with respect to the first main coil (particularly with respect to the center of the first main coil) near the ground module GPM, and is connected to the ground module GPM via antenna lines.
[0018] In an advantageous improvement, at least one of the plurality of second antennas of the vehicle module CPM is arranged on the vehicle, outside the vehicle module CPM, having a known relative position with respect to the second main coil (particularly with respect to the center of the second main coil), and is connected to the vehicle module CPM via an antenna line.
[0019] By arranging at least one of the plurality of first antennas of the GPM outside the ground module GPM, near the ground module GPM, and having a known relative position with respect to the first main coil, or by arranging at least one of the plurality of second antennas on the vehicle, outside the vehicle module CPM, and having a known relative position with respect to the second main coil, the resulting antenna geometry improves the accuracy of determining the relative position of the GPM and CPM. Furthermore, this allows for a significant increase in the distance to the respective main coil, resulting in a significant reduction in transmission losses during data and / or signal communication between the GPM and CPM during induced energy transfer, or in interference during the determination of the relative position between the CPM and GPM.
[0020] The self-organizing radio network is advantageously an ultra-wideband radio network, a WLAN radio network, a ZigBee radio network, an NFC radio network, a WiMAX radio network, or a Bluetooth radio network.
[0021] The first and second main coils are advantageously flat coils that are approximately horizontally aligned (i.e., have coil axes that are approximately vertically aligned).
[0022] Advantageously, the first and second antennas, or each of the first and second antennas, have rotationally symmetric shapes and / or rotationally symmetric (omnidirectional) antenna characteristics.
[0023] The term "rotationally symmetric (omnidirectional) antenna characteristics" refers to the uniform radiation pattern of each antenna in all directions in the horizontal plane. This enables direction-independent, consistently good communication between the vehicle module CPM and the ground module GPM.
[0024] Advantageously, the first antenna and / or the second antenna have a conical or tapered antenna geometry.
[0025] Designing the first antenna and / or the second antenna as a conical or biconical antenna is advantageous. Conical or biconical antennas have good broadband and omnidirectional radiation characteristics.
[0026] A conical antenna has a conical design, in which the apex of the cone forms the feed point.
[0027] A biconical antenna consists of two axially aligned conical halves that contact at their tips at the feed point. Waves propagate radially between the conical halves.
[0028] Conical or biconical antennas advantageously have a conical opening angle between 80° and 90°.
[0029] Another aspect of the invention relates to a vehicle including a vehicle module CPM having a second main coil, wherein the vehicle module CPM is designed and configured to inductively receive energy from a ground module GPM, particularly a stationary ground module GPM, a first main coil, or inductively transfer energy to the first main coil.
[0030] The vehicle is characterized in that: the vehicle module CPM has a second transceiver unit, the second transceiver unit having at least one second antenna for data and / or signal communication, particularly for location data communication, with the first transceiver unit of the ground module GPM. The first transceiver unit of the GPM has at least one first antenna for data and / or signal communication with the second transceiver unit of the CPM.
[0031] A further feature of the vehicle is that the at least one second antenna is arranged outside the second main coil of the vehicle module CPM, and the at least one first antenna and the at least one second antenna are configured and designed to form a self-organizing radio network.
[0032] An advantageous improvement to the vehicle is characterized in that at least one of a plurality of second antennas is arranged on the vehicle, outside the vehicle module CPM, having a known relative position with respect to the second main coil, and is connected to the vehicle module CPM via an antenna line.
[0033] An advantageous improvement to the vehicle is characterized in that each of the second antennas has a rotationally symmetric antenna geometry, particularly a conical antenna geometry with rotationally symmetric antenna characteristics.
[0034] Other advantageous improvements to the vehicle are derived from reasonable or similar transfers of the features described above in the description of the proposed inductive charging system to the vehicle.
[0035] Other advantages, features, and details will become apparent from the following description, in which—optionally with reference to the accompanying drawings—at least one exemplary embodiment is described in detail. Identical, similar, and / or functionally identical parts are given the same reference numerals.
[0036] In the attached diagram:
[0037] Figure 1 A schematic representation of the proposed inductive charging system is shown.
[0038] Figure 2 A schematic top view of the ground module GPM is shown.
[0039] Figure 3 A schematic cross-sectional view of a conical antenna is shown.
[0040] Figure 4 It shows Figure 3 A schematic oblique view of the conical antenna in the image.
[0041] Figure 1 A schematic representation of the proposed inductive charging system for a vehicle is shown. The inductive charging system includes a vehicle module CPM 101 and a ground module GPM 102, wherein the ground module GPM has a first main coil 103, which is designed as a flat coil with a vertical coil axis, and the vehicle module CPM 101 has a second main coil 104, which is also designed as a flat coil with a vertical coil axis.
[0042] The ground module GPM 102 and the vehicle module CPM 101 are designed and configured to inductively transfer energy from the ground module GPM 102 to the vehicle module CPM 101 and / or vice versa. This specifically occurs only when the first main coil 103 and the second main coil 104 are positioned vertically relative to each other such that their coil axes form a common axis. In the described scenario, this is not the case. Therefore, Figure 1 This illustrates a scenario where the vehicle with vehicle module CPM 101 still needs to be optimally positioned above the stationary ground module GPM 102.
[0043] The ground module GPM 102 has a first transceiver unit 105 with three first antennas 106 for data and / or signal communication with the vehicle module CPM 101, particularly for location data communication.
[0044] The vehicle module CPM 101 has a second transceiver unit 107 with three second antennas 108, which in this case are used for data communication and / or signal communication with the ground module GPM 102, particularly for communication of location data.
[0045] All three first antennas 106 are arranged outside the first main coil 103 of the ground module GPM 102, wherein one first antenna 106 is fixedly arranged on the ground module GPM 102 itself, and two first antennas 106 are fixedly arranged on the ground outside the ground module GPM 102. The relative positions of the three first antennas 106 with respect to the center of the first main coil 103 are known to the ground module GPM 102 and are advantageously transmitted from the ground module to the vehicle module CPM 101 via the first antennas 106.
[0046] The two secondary antennas 108 shown are each positioned outside the second main coil 104 of the vehicle module CPM 101, wherein one secondary antenna 108 is located on the vehicle module 101 itself, and the other secondary antenna 108 is located on the vehicle. This spatial separation of antennas 106, 108 results in improved accuracy in determining the relative position of the first main coil 103 with respect to the second main coil 104.
[0047] Advantageously, a total of 3 or 4 or 5 or 6 or 7 or 8 first antennas 106 are arranged outside the first main coil, wherein, advantageously, 1 to 4 first antennas 106 are arranged outside the ground module GPM 102 or at a fixed position away from the ground module GPM 102.
[0048] Advantageously, a total of 3 or 4 or 5 or 6 or 7 or 8 secondary antennas 108 are arranged outside the second main coil, wherein, advantageously, 1 to 4 secondary antennas 108 are arranged on the vehicle, outside the vehicle module CPM 101, or away from the vehicle module CPM 101.
[0049] Each of the first antennas 106 is connected to the first transceiver unit 105 either by wire or wireless means. The first transceiver unit 105 is used to control the first antennas 106 and is advantageously used to provide GPM or location information of the first antennas.
[0050] Each of the second antennas 108 is connected, either wired or wirelessly, to the second transceiver unit 107. The second transceiver unit 107 is used to control the second antenna 108 and is advantageously used to evaluate the received signals and data to determine the current relative position of the first main coil 103 and the second main coil 104, particularly the current relative position from the center of the first main coil 103 to the center of the second main coil 104.
[0051] In this embodiment, the first antenna 106 and the second antenna 108 are each configured and designed to form a self-organizing ultra-wideband radio network. Using this radio network, the relative positions of the respective antennas 106 / 108 can be advantageously determined relative to each other.
[0052] Figure 2 A schematic top view of an exemplary ground module GPM 102 is shown, which has a first main coil 103 for transmitting induced energy to a second main coil 104 of a vehicle module 101. Additionally, six first antennas 106 are shown as an example, with five first antennas located on the ground module GPM 102 and one first antenna 106 positioned remotely from and fixed near the ground module GPM 102.
[0053] Figure 3 A schematic cross-sectional view of a conical antenna 109 is shown, which has an antenna base 111 and an antenna feed 110 located at the tip of the cone. This conical antenna is advantageously used as a first antenna and a second antenna.
[0054] Figure 4 It shows Figure 3 A schematic oblique view of a conical antenna.
[0055] Although the invention has been further illustrated and described in detail with reference to preferred exemplary embodiments, the invention is not limited to the disclosed examples, and other variations can be derived from it by those skilled in the art without departing from the scope of the invention. Therefore, it is clear that a wide variety of possible variations exist. It is also clear that the illustrated embodiments are merely examples and should not be construed in any way as limiting the scope, applicability, or configuration of the invention. Specifically, the foregoing description and the description of the drawings enable those skilled in the art to practice the described exemplary embodiments, and such persons, knowing the disclosed inventive concept, can make various changes, such as with regard to the function or arrangement of the various elements referenced in an exemplary embodiment, without departing from the scope defined by the claims and their legal equivalents, such as the more detailed explanation in the specification.
[0056] List of reference numerals
[0057] 101 Vehicle Module CPM
[0058] 102 Ground Module GPM
[0059] 103 First main coil
[0060] 104 Second main coil
[0061] 105 First Transceiver Unit
[0062] 106 First Antenna
[0063] 107 Second transceiver unit
[0064] 108 Second Antenna
[0065] 109 Antennas with rotationally symmetric (conical) antenna geometry
[0066] 110 Antenna Feed
[0067] 111 Antenna Base
Claims
1. An inductive charging system for a vehicle, comprising a vehicle module CPM (101) and a ground module GPM (102), wherein, The ground module GPM (102) has a first main electrical coil (103), the vehicle module CPM (101) has a second main electrical coil (104), and the ground module GPM (102) and the vehicle module CPM (101) are designed and configured to inductively transfer energy from the ground module GPM (102) to the vehicle module CPM (101) and / or vice versa. Its features are, - The ground module GPM (102) has a first transceiver unit (105) with at least one first antenna (106) for data and / or signal communication with the vehicle module CPM (101), particularly for location data communication. - The vehicle module CPM (101) has a second transceiver unit (107) with at least one second antenna (108) for data and / or signal communication with the ground module GPM (102), particularly for location data communication. - The first antenna (106) is arranged outside the first main coil (103) of the ground module GPM (102). - The second antenna (108) is arranged outside the second main coil (104) of the vehicle module CPM (101), and - The at least one first antenna (106) and the at least one second antenna (108) are configured and designed to form a self-organizing radio network.
2. The inductive charging system according to claim 1, Its features are, The radio network is an ultra-wideband radio network, a WLAN radio network, a ZigBee radio network, an NFC radio network, a WiMAX radio network, or a Bluetooth radio network.
3. The inductive charging system according to claim 1 or 2, Its features are, The first main coil (103) and the second main coil (104) are flat coils.
4. The inductive charging system according to any one of claims 1 to 3, Its features are, At least one of the plurality of first antennas (106) is fixedly arranged outside the ground module GPM (102), having a known relative position with respect to the first main coil (103) in the vicinity of the ground module GPM (102), and connected to the ground module GPM (102) via antenna lines.
5. The inductive charging system according to any one of claims 1 to 4, Its features are, At least one of the plurality of second antennas (108) is arranged on the vehicle, outside the vehicle module CPM (101), and connected to the vehicle module CPM (101) via an antenna line.
6. The inductive charging system according to any one of claims 1 to 5, Its features are, The first antenna (106) and the second antenna (108) each have: - Rotationally symmetric shapes, and / or - Rotationally symmetric antenna characteristics.
7. The inductive charging system according to claim 7, Its features are, The first antenna (106) and / or the second antenna (108) have a conical antenna geometry.
8. A vehicle comprising a vehicle module CPM (101) having a second main electrical coil (104), wherein, The vehicle module CPM (101) is designed and configured to receive energy inductively from the first main coil (103) of the ground module GPM (102), or to transfer energy to the first main coil (103). Its features are, - The vehicle module CPM (101) has a second transceiver unit (107) with at least one second antenna (108) for data and / or signal communication with the first transceiver unit (105) of the ground module GPM (102), particularly for communication of location data. - The second antenna (108) is arranged outside the second main coil (104) of the vehicle module CPM (101), and - At least one first antenna (106) and at least one second antenna (108) are configured and designed to form a self-organizing radio network.
9. The vehicle according to claim 8, Its features are, At least one of the plurality of second antennas (108) is arranged on the vehicle, outside the vehicle module CPM (101), having a known relative position with respect to the second main coil (104), and connected to the vehicle module CPM via an antenna line.
10. The vehicle according to claim 8 or 9, Its features are, The second antenna (108) each has a rotationally symmetric antenna geometry, particularly a conical antenna geometry with rotationally symmetric antenna characteristics.