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EP-4735297-A1 - SYSTEM FOR INDUCTIVELY ELECTRICALLY CHARING A VEHICLE

EP4735297A1EP 4735297 A1EP4735297 A1EP 4735297A1EP-4735297-A1

Abstract

The invention relates to a system for inductively electrically charging a vehicle (101), comprising a secondary coil unit CPM (102) arranged in the vehicle (101), and a primary coil unit GPM (103) which is positioned in a fixed place, wherein a number (N) of position markers PM n (104) are arranged in the primary coil unit GPM (103) and/or in the surroundings thereof, and on or in the vehicle (101) and/or in the secondary coil unit CPM (103), wherein the primary coil unit GPM (103) is designed and configured to determine positions POS GPM (PM n ) of the position markers PM n (104) in a coordinates system the coordinates origin of which is identical to a midpoint position MPOS GPM of the first main coil of the primary coil unit GPM (103), and to transmit the determined positions POS GPM (PM n ) to a control unit (105), and/or the secondary coil unit CPM (102) is designed and configured to determine positions POS CPM (PM n ) of the position markers PM n (104) in a coordinates system the coordinates origin of which is identical to a midpoint position MPOS CPM of the second main coil of the secondary coil unit CPM (102), and to transmit the determined positions POS CPM (PM n ) to the control unit (105), and the control unit (105) is designed and configured, using the determined positions POS GPM (PM n ) and/or the determined positions POS CPM (PM n ), to generate instructions for the longitudinal and transverse controlling of the vehicle (101) in such a manner that when implemented, the midpoint position MPOS CPM can be made congruent with the midpoint position MPOS GPM .

Inventors

  • WEBER, MARTIN
  • NORRDINE, Abdelmoumen

Assignees

  • BRUSA Elektronik AG

Dates

Publication Date
20260506
Application Date
20240626

Claims (10)

  1. 1. System for inductively charging a vehicle (101), in particular an electric or hybrid vehicle, comprising a secondary coil unit CPM (102) arranged in the vehicle (101), and a stationary primary coil unit GPM (103), wherein energy can be inductively transmitted from a first main coil of the primary coil unit GPM (103) to a second main coil of the secondary coil unit CPM (102) or vice versa, characterized in that - in the primary coil unit GPM (103) and/or in its surroundings, and on or in the vehicle (101) and/or in the secondary coil unit CPM (103) a number N of position markers PM n (104) are arranged, with N > 2 and n = 1, 2, ..., N, where - the primary coil unit GPM (103) is designed and configured to determine positions POS G p M (PM n ) of the position markers PM n (104) in a coordinate system whose coordinate origin is identical to a center position MPOS GPM of the first main coil of the primary coil unit GPM (103), and to transmit the determined positions POS GPM (PM n ) to a control unit (105), and/or the secondary coil unit CPM (102) is designed and configured to determine positions POS CP M(PM n ) of the position markers PM n (104) in a coordinate system whose coordinate origin is identical to a center position MPOS CP M of the second main coil of the secondary coil unit CPM (102), and to transmit the determined positions POS CP M(PM n ) to the control unit (105), and - the control unit (105) is designed and configured to generate instructions for longitudinal and transverse control of the vehicle (101) using the determined positions POS GPM (PM n ) and/or the determined positions POS CP M (PM n ) in such a way that, when they are implemented, the center position MPOS CP M can be made to coincide with the center position MPOS GPM .
  2. 2. System according to claim 1, characterized in that the control unit (105) and/or the primary coil unit GPM (103) and/or the secondary coil unit CPM (102) are designed and set up in such a way that they/they know: a relative positioning of the center position MPOSGPM relative to at least one stationary position marker PM n (104)& in the primary coil unit GPM (103) or relative to a stationary position marker PM n (104) in the vicinity of the primary coil unit GPM (103) and a relative positioning of the center position MPOSGPM relative to at least one position marker PM n (104) arranged on or in the vehicle (101) or relative to a position marker PM n (104) arranged in the secondary coil unit CPM (102).
  3. 3. System according to claim 1 or 2, characterized in that the primary coil unit GPM (103) is designed and set up in such a way that it knows a relative positioning of the center position MPOS GPM relative to at least one stationary position marker PM n (104) in the primary coil unit GPM (103) or relative to at least one stationary position marker PM n (104) in the vicinity of the primary coil unit GPM (103), and this relative positioning is used in determining the positions POS GPM (PM n ) of the position markers PM n (104) in the coordinate system whose coordinate origin is identical to a center position MPOS GPM of the first main coil of the primary coil unit GPM (103).
  4. 4. System according to one of claims 1 to 3, characterized in that the secondary coil unit CPM (102) is designed and set up in such a way that it knows a relative positioning of the center position MPOSGPM relative to at least one position marker PM n (104) arranged on or in the vehicle (101) or relative to a position marker PM n (104) arranged in the secondary coil unit CPM (102), and this relative positioning is used in determining the positions POScpM(PM n ) of the position markers PM n (104) in the coordinate system whose coordinate origin is identical to a center position MPOSGPM of the second main coil of the secondary coil unit CPM (102).
  5. 5. System according to one of claims 1 to 4, characterized in that the number is N > 3 or N > 4 or N > 5 or N > 6 or N > 7.
  6. 6. System according to one of claims 1 to 5, characterized in that the position markers PM n (104) are set up and designed to form a radio network, in particular an ad-hoc radio network, and to transmit and/or exchange signals, in particular position signals, therein.
  7. 7. System according to claim 6, characterized in that the radio network is designed and set up to determine respective relative positions RP(PM n , PM m ) of the position markers PM n (104) to one another, with nm and n, me {1, 2,..., N} and to transmit the relative positions RP(PM n , PM m ) to the primary coil unit GPM (103) and/or the secondary coil unit CPM (102) and/or the control unit (105).
  8. 8. System according to one of claims 1 to 7, characterized in that the primary coil unit GPM (103) is designed and configured to determine the positions POS(PM n ) of the position markers PM n (104) on the basis of signal propagation time measurements and/or signal strengths.
  9. 9. System according to one of claims 1 to 8, characterized in that the secondary coil unit CPM is designed and configured to determine the positions POS(PM n ) of the position markers PM n on the basis of signal propagation time measurements and/or signal strengths.
  10. 10. Method for operating a system for inductive electrical charging of a vehicle (101), in particular an electric or hybrid vehicle, according to one of claims 1 to 9 with the following steps, - by the primary coil unit GPM determining (201) positions POS G pM(PM n ) of the position markers PM n in a coordinate system whose coordinate origin is identical to a center position MPOSGPM of the first main coil of the primary coil unit GPM, and transmitting the positions POS G p M (PM n ) to the control unit, and/or by the secondary Coil unit CPM determining (202) positions POS C pM(PM n ) of the position markers PM n in a coordinate system whose coordinate origin is identical to a center position M POSCPM of the second main coil of the secondary coil unit CPM, and transmitting the positions POS G p M (PM n ) to the control unit, and - using the positions POS G p M (PM n ) and/or positions POS G p M (PM n ), generating (203) instructions for the longitudinal and lateral control of the vehicle such that, when they are implemented, the center position MPOSCPM can be made to coincide with the center position MPOS GPM .

Description

System for inductive electrical charging of a vehicle The invention relates to a system for inductively electrically charging a vehicle, in particular a motor vehicle, comprising a secondary coil unit CPM (Car Pad Module) arranged in the vehicle and at least one stationary primary coil unit GPM (Ground Pad Module), wherein energy can be inductively transmitted from a first main coil of the primary coil unit GPM to a second main coil of the secondary coil unit CPM and/or energy can be inductively transmitted from the second main coil of the secondary coil unit CPM to the first main coil of the primary coil unit GPM. The invention further relates to a method for operating such a system. Systems for inductively charging batteries of purely electric vehicles or hybrid vehicles are known in the prior art. For the inductive transfer of energy between the primary coil unit GPM, which is typically arranged stationary on the ground, and a secondary coil unit CPM in a vehicle, typically arranged on its underside, it is necessary that the first main coil of the GPM and the second main coil of the CPM are optimally positioned one above the other in order to achieve the highest possible inductive coupling coefficient k close to 1. The inductive energy transfer can take place from the GPM to the CPM, for example to charge a vehicle battery. Conversely, the inductive energy transfer can take place from the CPM to the GPM, for example when the vehicle battery is used as an energy storage device that is to be used to operate consumers connected downstream of the GPM. The object of the invention is to provide a system for inductive electrical charging of a vehicle which enables an improved, more robust and more precise positioning of the first main coil of the GPM relative to the second main coil of the CPM. The invention results from the features of the independent claims. Advantageous further developments and refinements are the subject of the dependent claims. Further features, possible applications and advantages of the invention result from the following description and the explanation of embodiments of the invention, which are shown in the figures. The object is achieved with a system for inductively electrically charging a vehicle, in particular an electric or hybrid vehicle, wherein the system comprises a secondary coil unit CPM arranged in the vehicle and at least one stationary primary coil unit GPM, wherein energy can be inductively transferred from a first main coil of the primary coil unit GPM to a second main coil of the secondary coil unit CPM or vice versa. The proposed system is characterized in that a number N of position markers PM n are arranged in the primary coil unit GPM and/or in its surroundings and on or in the vehicle and/or in the secondary coil unit CPM, with N > 2 and n = 1, 2, ..., N, wherein the primary coil unit GPM is designed and configured to determine positions POS GPM (PMn) of the position markers PM n in a coordinate system whose coordinate origin is identical to a center position MPOS GPM of the first main coil of the primary coil unit GPM, and to transmit the determined positions POS GPM (PM n ) to a control unit, and/or the secondary coil unit CPM is designed and configured to determine positions POSc P M(PM n ) of the position markers PM n in a coordinate system whose coordinate origin is identical to a center position MPOS CP M of the second main coil of the secondary coil unit CPM, and to transmit the determined positions POS CP M(PM n ) to the control unit. Furthermore, according to the invention, the control unit is designed and configured to generate instructions for longitudinal and transverse control of the vehicle using the positions POS GPM (PM n ) and/or the positions POS CP M (PM n ) in such a way that, when they are implemented, the center position MPOS CP M can be made to coincide with the center position MPOS GPM . In particular, by taking into account and integrating position markers PM n arranged in a fixed location in the vicinity of the primary coil unit GPM and/or by taking into account and integrating position markers PM n arranged fixedly on the vehicle outside the CPM, the achievable accuracy and robustness in the longitudinal and lateral control of the vehicle and thus the positioning accuracy of the first and second main coils one above the other is increased. Advantageously, the number N of position markers PM n : N > 3, in particular N > 5 or N > 6 or N > 7 or N > 8 or N > 9 or N > 10 or N > 11 or N > 12 or N > 15 . Advantageously, at least one or more position markers PM n are arranged on a further primary coil unit GPMa, GPMb, etc. and/or on an infrastructure (parking garage, building, in the floor covering, etc.) in the vicinity of the primary coil unit GPM. Advantageously, the positions POS G pM(PM n ), POS C pM(PM n ), MPOSCPM and MPOSGPM are uniform 2D or 3D positions. The position markers PM n are advantageously arranged as follows: in the primary