Search

DE-102024132780-A1 - Floor module for an inductive vehicle charging system

DE102024132780A1DE 102024132780 A1DE102024132780 A1DE 102024132780A1DE-102024132780-A1

Abstract

The invention relates to a ground module GPM (100) of an inductive charging system, wherein the ground module GPM has a housing (101) with a top (102), the top (102) being formed at least partially by a top plate (103) made of an electrically insulating material, a high-voltage assembly HSBG (104) is arranged in the housing (102) which comprises at least one main coil which serves for inductive energy transfer through the top plate (103), and the ground module GPM (100) is designed and configured to inductively transfer energy to a vehicle module CPM arranged in a vehicle by means of the main coil. The base module GPM (100) is characterized by the fact that a low-voltage assembly NSBG (105) is arranged in the housing (101), wherein at least one electrically conductive component of the low-voltage assembly NSBG (105) is arranged directly below and/or in the top plate (103), electrically conductive parts of the housing (101) are electrically grounded, and the low-voltage assembly NSBG (105) is designed to be base-insulated and/or galvanically decoupled from the high-voltage assembly HSBG (104).

Inventors

  • Lukas Böhler

Assignees

  • BRUSA ELEKTRONIK AG

Dates

Publication Date
20260513
Application Date
20241111

Claims (11)

  1. Ground module GPM (100) of an inductive vehicle charging system, wherein: - the ground module GPM has a housing (101) with a top surface (102), - the top surface (102) is at least partially formed by a top surface plate (103) made of an electrically insulating material, - a high-voltage assembly HSBG (104) is arranged in the housing (101), which comprises at least one main coil that serves for inductive energy transfer through the top surface plate (103), - the ground module GPM (100) is designed and configured to inductively transfer energy to a vehicle module CPM arranged in a vehicle by means of the main coil, characterized in that: - a low-voltage assembly NSBG (105) is arranged in the housing (101), wherein at least one electrically conductive component of the low-voltage assembly NSBG (105) is arranged directly below and/or in the top surface plate (103), - electrically conductive parts of the housing (101) are electrically grounded are, and - the low-voltage assembly NSBG (105) is basic-insulated and/or galvanically decoupled from the high-voltage assembly HSBG (104).
  2. Ground module GPM (100) according to Claim 1 , characterized in that the low-voltage assembly NSBG (105) is - a FOD sensor assembly BGFOD, which serves to detect foreign objects in the area of the top of the base module GPM (100) and/or - a LOD sensor assembly BGLOD, which serves to detect living beings in the area of the top (102) and/or in an environment of the base module GPM (100) and/or - a fan assembly, which serves to ventilate the housing (101) and/or - a receiver and/or transmitter assembly, which serves to receive and transmit data.
  3. Ground module GPM (100) according to one of the Claims 1 until 2 , characterized in that the high-voltage assembly HSBG (104) is operated with a voltage in the range of 350 V to 8000 V.
  4. Ground module GPM (100) according to one of the Claims 1 until 3 , characterized in that the low voltage assembly NSBG (105) is operated with a voltage in the range of 1 V to 100 V.
  5. Ground module GPM (100) according to one of the Claims 1 until 4 , characterized in that the electrically conductive component of the low voltage assembly NSBG (105) is a sensor, an antenna or an antenna array.
  6. Ground module GPM according to one of the Claims 1 until 4 , characterized in that the electrically conductive component of the low voltage assembly NSBG (105) is a fan and/or its housing.
  7. Ground module GPM according to one of the Claims 1 until 4 , characterized in that the electrically conductive component of the low-voltage assembly NSBG is an evaluation electronics unit and/or its housing.
  8. Ground module GPM according to one of the Claims 1 until 7 , characterized in that several low-voltage assemblies NSBG (105) are present in the housing (101), each of which is separately basic-insulated and/or galvanically decoupled from the high-voltage assembly HSBG (104).
  9. Ground module GPM according to one of the Claims 1 until 8 , characterized in that the one or more low-voltage assembly(s) NSBG (105) are each arranged in a separate first housing within the housing (101), wherein the first housing(s) are each separately basic-insulated and/or galvanically decoupled from the high-voltage assembly HSBG (104).
  10. Ground module GPM according to one of the Claims 1 until 9 , characterized in that the one high-voltage assembly HSBG (104) is arranged within the housing (101) in a separate second housing, wherein the second housing is separately basic-insulated and/or galvanically decoupled from the low-voltage assembly(s) NSBG (104) and/or their first housings (106).
  11. Inductive charging system for vehicles with a GPM 100 floor module according to one of the Claims 1 until 10 , wherein the ground module GPM 100 is designed and configured to inductively transfer energy to a second main coil of a vehicle module CPM arranged in a vehicle.

Description

The invention relates to a ground module GPM for an inductive vehicle charging system, in particular for electric vehicles and hybrid vehicles. Such inductive vehicle charging systems are well known in the prior art. These typically comprise a stationary ground module (GPM) mounted on the ground, which is connected to a power supply and has a primary coil through which energy can be inductively transferred to a secondary coil of a vehicle module (CPM) located in a vehicle. The energy transferred to the vehicle module (CPM) can be used, for example, to charge an energy storage device (battery) located in the vehicle. Such a ground module GPM typically has within its housing one or more low-voltage electrical assemblies NSBG and at least one high-voltage assembly HSBG, the latter in particular comprising the electrical control of the primary coil and the primary coil itself. Due to the high magnetic field strengths generated by the primary coil, metallic foreign objects located in the immediate vicinity, especially on a surface of the housing of the ground module GPM, can experience strong heating, in extreme cases so intense that the heated foreign objects burn through the housing of the ground module GPM or the ground module GPM can be damaged by mechanical impact to such an extent that in both cases there may be a risk of access to potentially dangerous high voltage. The object of the invention is to provide a ground module GPM that prevents such electrical risks. The invention is defined by the features of the independent claims. Advantageous further developments and embodiments are the subject of the dependent claims. Further features, applications, and advantages of the invention will become apparent from the following description and the explanation of an exemplary embodiment of the invention, which is illustrated in the figure. The problem is solved with a ground module GPM for an inductive vehicle charging system, wherein the ground module GPM has a housing with a top surface, the top surface being formed at least partially by a top plate made of an electrically insulating material, a high-voltage assembly HSBG is arranged in the housing, which includes at least one main coil which serves for inductive energy transfer through the electrically insulating top plate, and the ground module GPM is designed and configured to inductively transfer energy to a vehicle module CPM arranged in a vehicle by means of the main coil. A floor module GPM according to the invention is characterized in that a low-voltage assembly NSBG is arranged in the housing, wherein at least one electrically conductive component of the low-voltage assembly NSBG is arranged directly below and/or in the top plate, electrically conductive parts of the housing are electrically grounded, and the low-voltage assembly NSBG is designed to be basic-insulated and/or galvanically decoupled from the high-voltage assembly HSBG. The base insulation and/or galvanic decoupling advantageously prevents unwanted current flow between the low-voltage assembly (NSBG) and the high-voltage assembly (HSBG) of the ground module (GPM), particularly in cases where, for example, a highly heated metallic foreign object burns through the top plate or where mechanical damage to the top plate of the ground module (GPM) potentially allows electrical contact between the low-voltage assembly (NSBG) and the high-voltage assembly (HSBG). This unwanted current can be life-threatening and cause damage to equipment. A ground module (GPM) according to the invention thus provides optimal protection against access to dangerous high voltage and therefore increases the electrical safety of the ground module (GPM). The basic insulation is advantageously achieved by a non-electrically conductive covering and/or coating of the current-carrying components of the low-voltage assembly NSBG and the high-voltage assembly HSPG. In this context, "galvanic decoupling/isolation" refers to the interruption of the electrical current flow between the low-voltage module (NSBG) and the high-voltage module (HSPG), while still allowing the exchange of power or signals between them. The electrical current flow between the low-voltage module (NSBG) and the high-voltage module (HSBG) of the ground module (GPM) is advantageously separated by electrically non-conductive coupling elements. With galvanic isolation, the electrical potentials of the low-voltage module (NSBG) and the high-voltage module (HSBG) of the ground module (GPM) are advantageously separated from each other, and the current flow is maintained. The circuits are advantageously isolated from each other. Naturally, this isolation must not be compromised elsewhere, for example via grounding. Earth loop currents and cross-interference from one supply rail to another are thus blocked, and protection against certain fault conditions (e.g., electrical short circuits) can be implemented. Galvanic decoupling (functional isolation) is advantage