EP3542443A1 - Device for inductively charging an electric vehicle, and method for detecting electrically conductive foreign bodies in such a device - Google Patents

Device for inductively charging an electric vehicle, and method for detecting electrically conductive foreign bodies in such a device

Info

Publication number
EP3542443A1
EP3542443A1 EP17780707.0A EP17780707A EP3542443A1 EP 3542443 A1 EP3542443 A1 EP 3542443A1 EP 17780707 A EP17780707 A EP 17780707A EP 3542443 A1 EP3542443 A1 EP 3542443A1
Authority
EP
European Patent Office
Prior art keywords
magnetic field
sensor
sensor coil
coil system
main magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17780707.0A
Other languages
German (de)
French (fr)
Inventor
Gabriel Krein
Moritz Braeuchle
Philipp Schumann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3542443A1 publication Critical patent/EP3542443A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • B60L53/124—Detection or removal of foreign bodies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/35—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
    • B60L53/38—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • the invention relates to a device for inductive charging of a
  • Electric vehicle comprising a primary coil for generating a
  • Main magnetic field and a sensor coil system for the detection of electrically conductive foreign bodies which has at least one sensor coil.
  • the invention also relates to a method for detecting electrically conductive foreign bodies in a device according to the invention.
  • Electric vehicles usually have an electrical energy storage, such as a traction battery, which can store electrical energy for the drive. Is this electrical energy storage completely or partially discharged, it can be recharged at a corresponding charging station.
  • charging stations are known in which the electrical energy by means of a charging cable to the electric
  • Charging stations are also known in which the electrical energy is transmitted inductively by means of a magnetic field, that is to say wirelessly, to the electrical energy store of the electric vehicle.
  • a charging station comprises a primary coil, which is designed for example as a set on the floor pallet.
  • the electric vehicle has a secondary coil which is mounted on an underbody of the electric vehicle. Between the primary coil and the secondary coil there is an air gap.
  • a magnetic field is generated by means of the primary coil, which penetrates the secondary coil and induces a corresponding current there.
  • the magnetic field is generated at a frequency of several kHz.
  • AI is an inductive energy transmission system and a method for detecting foreign objects in the inductive
  • the energy transmission system comprises a metal detector, which can detect metallic foreign objects by means of additional test coils.
  • a method and a device for determining a foreign object are also known from DE 10 2013 219 678 AI.
  • a capacitance element is connected to a coil and a magnetic field is generated.
  • the frequency of the magnetic field is varied and a recorded trace is compared with a reference profile.
  • Main magnetic field and a sensor coil system for the detection of electrically conductive foreign bodies The sensor coil system has at least one sensor coil.
  • the primary coil is traversed by an alternating current with a main frequency and the main magnetic field is thus an alternating magnetic field with the same main frequency.
  • the primary coil is, for example, circular in shape and generates a main magnetic field, which penetrates into a secondary coil, which is attached to an underbody of the electric vehicle.
  • the sensor coils of the sensor coil system are arranged and interconnected relative to the primary coil in such a way that no voltage is induced by the main magnetic field in the absence of sensor-generated magnetic fields in the sensor coil system, and that in the presence of a generated by a foreign body interference magnetic field in the
  • Sensor coils are induced.
  • the sensor coils are designed and interconnected such that in the absence of electrically conductive foreign bodies, the partial voltages induced by the subfields of the main magnetic field cancel each other out.
  • no voltage can be measured at the sensor coil system.
  • a relatively low voltage can be measured, which is below a predetermined threshold.
  • Partial voltages no longer open. On the sensor coil system thus a voltage can be measured, which is above the predetermined threshold.
  • Sensor coil system a sensor coil which is arranged such that in the absence of interference magnetic fields generated by foreign bodies, the sensor coil of two subfields of the main magnetic field of the same field strength and opposite direction is traversed.
  • the sensor coil system has at least two sensor coils, which are arranged such that in the absence of interference magnetic fields generated by foreign bodies, the at least two sensor coils are traversed by the same subfield of the main magnetic field.
  • the sub-field of the main magnetic field thus induces the same partial voltage with the same amount in each sensor coil.
  • the sensor coils are connected in series such that the
  • the sensor coil system at least two sensor coils, which are arranged such that in the absence of interference magnetic fields generated by foreign bodies, the at least two sensor coils of two subfields of
  • Main magnetic field of the same field strength and opposite direction are flowed through.
  • the two sub-fields of the main magnetic field thus induce in each sensor coil the same sub-voltage with the same amount.
  • Sensor coils are connected in series in such a way that the partial voltages point in opposite directions and cancel each other out.
  • Sensor coil system exactly two sensor coils, which are configured identically.
  • Sensor coil system at least two sensor coils, which
  • the means for generating a sensor magnetic field comprise in particular an AC power source or an AC voltage source.
  • the means for determining properties of the sensor coil system include, for example, measuring devices for measuring current and voltage and a phase shift between current and voltage.
  • a method for detecting electrically conductive foreign bodies in a device according to the invention is also proposed.
  • a main magnetic field for transmitting energy to the secondary coil is generated on the underbody of the electric vehicle.
  • a voltage induced in the sensor coil system by the main magnetic field is measured.
  • an electrically conductive foreign body is detected when the measured voltage exceeds a predetermined threshold. In this case, will be on the
  • Sensor coil system are determined.
  • the determination of properties of the sensor coil system represents an additional possibility for the detection of electrically conductive foreign bodies in the device according to the invention, which is independent of the main magnetic field.
  • an impedance, an inductance, an ohmic resistance and / or a quality of the sensor coil system are determined.
  • current and voltage as well as a phase shift between current and voltage of the sensor coil system are measured.
  • the desired variables impedance, inductance, ohmic resistance and quality of the sensor coil system can be determined by calculation from the measured values.
  • the sensor magnetic field preferably has a sensor frequency which deviates from the main frequency of the main magnetic field. This is the result
  • the inventive device for inductively charging an electric vehicle and the method according to the invention allow a relatively simple detection of electrically conductive foreign bodies in the device.
  • Main magnetic field is induced allows.
  • an active detection of foreign bodies by generating a sensor magnetic field by means of the sensor coil system and determination of properties of the sensor coil system is made possible.
  • Said active detection is independent of the main magnetic field and can be carried out before the main magnetic field is generated, for example shortly before the beginning of a charging process.
  • the active detection can also take place in parallel with the inductive charging of the electric vehicle.
  • the main magnetic field does not induce
  • Noise voltages which influence the means for determining properties of the sensor coil system In particular, a decoupling of Main magnetic field and the sensor magnetic field possible if both magnetic fields have different frequencies.
  • Ferritic foreign bodies can also be detected by means of the device according to the invention and by the method according to the invention. Ferritic foreign bodies cause a local amplification and a local weakening of the main magnetic field.
  • Figure 1 is a schematic representation of an electric vehicle and a
  • Figure 2 is a schematic plan view of a main magnetic field of a
  • Figure 3 is a schematic plan view of a main magnetic field of a
  • Figure 4 is a schematic plan view of a main magnetic field of a
  • Figure 5 is a schematic plan view of a main magnetic field of a
  • Figure 6 is a schematic plan view of a main magnetic field of a
  • FIG. 1 shows an electric vehicle 17, which is placed over a device for inductive charging of the electric vehicle 17, shown schematically.
  • a device for inductive charging of the electric vehicle 17 is also referred to as inductive charging station.
  • the device for inductively charging the electric vehicle 17 is located on a floor 15 below the electric vehicle 17 and includes a
  • a secondary coil 12 is mounted on an underbody 16 of the electric vehicle 17.
  • the electric vehicle 17 is in the present case turned off so that the
  • Secondary coil 12 is arranged largely over the primary coil 11.
  • the main magnetic field 10 generated by the primary coil 11 thus penetrates the secondary coil 12, whereby energy from the primary coil 11 to the
  • Secondary coil 12 receives the energy transmitted from the primary coil 11 and charges a traction battery 18 of the electric vehicle 17.
  • Gap 14 with the air gap also extends between the
  • Primary coil 11 and the secondary coil 12 The primary coil 11 and the secondary coil 12.
  • the device for inductively charging the electric vehicle 17 also includes
  • Secondary coil 12 can be located.
  • the sensor coil system 30 in this case has one or more sensor coils 31, 32, 33, which are presently arranged on the primary coil 11 and in the intermediate space 14.
  • the primary coil 11 is presently formed approximately as an annular coil or circular coil.
  • the main magnetic field 10 is depicted by drawn field lines. The field lines of the main magnetic field 10 generated by the primary coil 11 penetrate the primary coil 11 and the
  • the primary coil 11 is traversed by an alternating current with a main frequency and the main magnetic field 10 is thus an alternating
  • Magnetic field with the same main frequency of, for example, 85 kHz.
  • the main magnetic field 10 is to a defined
  • the main magnetic field 10 comprises a first subfield 21, in which the
  • the main magnetic field 10 comprises a second subfield 22 in which the field lines of the main magnetic field 10 extend approximately perpendicularly from the underbody 16 of the electric vehicle 17 to the ground 15, that is to say downwards.
  • Figure 2 shows a schematic plan view of the main magnetic field 10 of a
  • the sensor coil system 30 has a first sensor coil 31, which is arranged such that the first sensor coil 31 is uniformly flowed through by the first sub-field 21 and by the second sub-field 22.
  • the first subfield 21 and the second subfield 22 thus induce in the first sensor coil 31 two sub-voltages of the same magnitude and
  • FIG. 3 shows a schematic plan view of the main magnetic field 10 of a device according to a second embodiment.
  • the sensor coil system 30 has a first sensor coil 31 and a second sensor coil 32, which are arranged such that the first sensor coil 31 and the second
  • Sensor coil 32 are flowed through by the second subfield 22.
  • the first sensor coil 31 and the second sensor coil 32 are of similar construction and in particular have the same number of turns and the same cross-sectional area.
  • the second subfield 22 thus induces in the first sensor coil 31 and in the second sensor coil 32 the same sub-voltage with the same amount.
  • the first sensor coil 31 and the second sensor coil 32 are connected in series in such a way that the partial voltages point in opposite directions and cancel each other out. At the sensor coil system 30 thus theoretically no voltage can be measured.
  • Figure 4 shows a schematic plan view of the main magnetic field 10 of a device according to a third embodiment.
  • the sensor coil system 30 has a first sensor coil 31 and a second sensor coil 32, which are arranged such that the first sensor coil 31 is flowed through by the first sub-field 21 and the second sensor coil 32 is flowed through by the second sub-field 22.
  • the first sensor coil 31 and the second sensor coil 32 are of similar construction and in particular have the same number of
  • the first subfield 21 and the second subfield 22 thus induce in the first sensor coil 31 and in the second sensor coil 32, the same partial voltage with the same amount.
  • the first sensor coil 31 and the second sensor coil 32 are connected in series such that the partial voltages in opposite
  • FIG. 5 shows a schematic plan view of the main magnetic field 10 of a device according to a fourth embodiment.
  • the sensor coil system 30 has a first sensor coil 31, a second sensor coil 32 and a third sensor coil 33, which are arranged such that the first sensor coil
  • the first sensor coil 31 is flowed through by the first subfield 21 and the second sensor coil 32 and the third sensor coil 33 are traversed by the second subfield 22.
  • the second sensor coil 32 and third sensor coil 33 are of similar construction and in particular have the same number of turns and the same cross-sectional area.
  • the first sensor coil 31 has a different structure therefrom and in particular has twice the number of turns as the second sensor coil 32 and the third sensor coil 33.
  • the first subfield 21 induces a in the first sensor coil 31 a
  • the second subfield 22 induces the same in the second sensor coil 32 and in the third sensor coil 33, which are connected in series
  • FIG. 6 shows a schematic plan view of the main magnetic field 10 of FIG.
  • the sensor coil system 30 has a first sensor coil 31 and a second sensor coil 32, which are arranged such that the first sensor coil 31 and the second
  • Sensor coil 32 are flowed through by the first sub-field 21.
  • the first sensor coil 31 and the second sensor coil 32 are arranged concentrically one above the other.
  • the turns of the first sensor coil 31 and the second sensor coil 32 are of similar construction and in particular have the same number of turns and the same cross-sectional area. However, the turns of the first sensor coil 31 and the second sensor coil 32 have
  • the first subfield 21 thus induces in the first sensor coil 31 and in the second sensor coil 32 the same sub-voltage with the same amount.
  • the first sensor coil 31 and the second sensor coil 32 are connected in series in such a way that the partial voltages point in opposite directions and cancel each other out. At the sensor coil system 30 thus theoretically no voltage can be measured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to a device for inductively charging an electric vehicle (17), comprising a primary coil (11) for generating a main magnetic field (10) and a sensor coil system (30) for detecting electrically conductive foreign bodies, having at least one sensor coil. The sensor coils are arranged and connected relative to the primary coil (11) such that no voltages are induced by the main magnetic field (10) if interference magnetic fields generated by foreign bodies are absent in the sensor coil system (30), and a voltage is induced by the main magnetic field (10) if an interference magnetic field generated by a foreign body is present in the sensor coil system (30). The invention also relates to a method for detecting electrically conductive foreign bodies in a device according to the invention, wherein a main magnetic field (10) is generated by means of the primary coil (11), a voltage induced in the sensor coil system (30) by the main magnetic field (10) is measured, and an electrically conductive foreign body is detected if the measured voltage exceeds a specified threshold.

Description

Beschreibung Titel  Description title
Vorrichtung zum induktiven Laden eines Elektrofahrzeugs und Verfahren zur Detektion von elektrisch leitfähigen Fremdkörpern in einer solchen Vorrichtung  Device for inductively charging an electric vehicle and method for detecting electrically conductive foreign bodies in such a device
Die Erfindung betrifft eine Vorrichtung zum induktiven Laden eines The invention relates to a device for inductive charging of a
Elektrofahrzeugs, umfassend eine Primärspule zur Erzeugung eines Electric vehicle, comprising a primary coil for generating a
Hauptmagnetfeldes und ein Sensorspulensystem zur Detektion von elektrisch leitfähigen Fremdkörpern, das mindestens eine Sensorspule aufweist. Die Erfindung betrifft auch ein Verfahren zur Detektion von elektrisch leitfähigen Fremdkörpern in einer erfindungsgemäßen Vorrichtung. Main magnetic field and a sensor coil system for the detection of electrically conductive foreign bodies, which has at least one sensor coil. The invention also relates to a method for detecting electrically conductive foreign bodies in a device according to the invention.
Stand der Technik State of the art
Elektrofahrzeuge weisen üblicherweise einen elektrischen Energiespeicher, beispielsweise eine Traktions-Batterie auf, welche elektrische Energie für den Antrieb speichern kann. Ist dieser elektrische Energiespeicher ganz oder teilweise entladen, so kann dieser an einer entsprechenden Ladestation wieder aufgeladen werden. Hierzu sind Ladestationen bekannt, bei welchen die elektrische Energie mittels eines Ladekabels zu dem elektrischen Electric vehicles usually have an electrical energy storage, such as a traction battery, which can store electrical energy for the drive. Is this electrical energy storage completely or partially discharged, it can be recharged at a corresponding charging station. For this purpose, charging stations are known in which the electrical energy by means of a charging cable to the electric
Energiespeicher übertragen wird. Energy storage is transmitted.
Es sind auch Ladestationen bekannt, bei welchen die elektrische Energie induktiv mittels eines Magnetfelds, also kabellos, zu dem elektrischen Energiespeicher des Elektrofahrzeugs übertragen wird. Eine solche Ladestation umfasst eine Primärspule, welche beispielsweise als eine auf den Boden gesetzte Ladeplatte ausgeführt ist. Das Elektrofahrzeug weist eine Sekundärspule auf, welche an einem Unterboden des Elektrofahrzeugs montiert ist. Zwischen der Primärspule und der Sekundärspule befindet sich ein Luftspalt. Zur Energieübertragung wird mittels der Primärspule ein Magnetfeld erzeugt, welches die Sekundärspule durchdringt und dort einen entsprechenden Strom induziert. Das Magnetfeld wird dabei mit einer Frequenz von mehreren kHz erzeugt. Wenn sich in dem Luftspalt zwischen der Primärspule und der Sekundärspule metallische Fremdkörper befinden können elektrische Wirbelströme in diesen Fremdkörpern induziert werden. Hierdurch können sich die Fremdkörper erheblich erhitzen. Dies verursacht einerseits eine Verlustleistung beim Laden des elektrischen Energiespeichers und stellt ferner eine Gefahr für Mensch und Umwelt dar. Daher ist es für einen sicheren Betrieb der Ladestation notwendig, metallische Fremdkörper zu erkennen. Charging stations are also known in which the electrical energy is transmitted inductively by means of a magnetic field, that is to say wirelessly, to the electrical energy store of the electric vehicle. Such a charging station comprises a primary coil, which is designed for example as a set on the floor pallet. The electric vehicle has a secondary coil which is mounted on an underbody of the electric vehicle. Between the primary coil and the secondary coil there is an air gap. For energy transmission, a magnetic field is generated by means of the primary coil, which penetrates the secondary coil and induces a corresponding current there. The magnetic field is generated at a frequency of several kHz. When metallic foreign bodies are present in the air gap between the primary coil and the secondary coil, electrical eddy currents can be induced in these foreign bodies. As a result, the foreign body can heat up considerably. This causes on the one hand a power loss when charging the electrical energy storage and also poses a danger to people and the environment. Therefore, it is necessary for safe operation of the charging station to detect metallic foreign bodies.
Aus der DE 10 2013 223 794 AI ist ein induktives Energieübertragungssystem und ein Verfahren zur Erkennung von Fremdobjekten in dem induktiven From DE 10 2013 223 794 AI is an inductive energy transmission system and a method for detecting foreign objects in the inductive
Energieübertragungssystem bekannt. Das Energieübertragungssystem umfasst dazu einen Metalldetektor, welcher mittels zusätzlicher Probespulen metallische Fremdobjekte detektieren kann. Energy transfer system known. For this purpose, the energy transmission system comprises a metal detector, which can detect metallic foreign objects by means of additional test coils.
Ein Verfahren und eine Vorrichtung zum Ermitteln eines Fremdobjekts sind auch aus der DE 10 2013 219 678 AI bekannt. Dabei wird ein Kapazitätselement mit einer Spule verbunden und es wird ein Magnetfeld erzeugt. Dabei wird die Frequenz des Magnetfelds variiert und eine aufgenommene Messkurve wird mit einem Referenzprofil verglichen. A method and a device for determining a foreign object are also known from DE 10 2013 219 678 AI. In this case, a capacitance element is connected to a coil and a magnetic field is generated. The frequency of the magnetic field is varied and a recorded trace is compared with a reference profile.
Offenbarung der Erfindung Disclosure of the invention
Es wird eine Vorrichtung zum induktiven Laden eines Elektrofahrzeugs vorgeschlagen, welche eine Primärspule zur Erzeugung eines It is proposed a device for inductive charging of an electric vehicle, which is a primary coil for generating a
Hauptmagnetfeldes und ein Sensorspulensystem zur Detektion von elektrisch leitfähigen Fremdkörpern umfasst. Das Sensorspulensystem weist dabei mindestens eine Sensorspule auf. Main magnetic field and a sensor coil system for the detection of electrically conductive foreign bodies. The sensor coil system has at least one sensor coil.
Die Primärspule wird von einem Wechselstrom mit einer Hauptfrequenz durchflössen und das Hauptmagnetfeld ist somit ein alternierendes Magnetfeld mit der gleichen Hauptfrequenz. Die Primärspule ist beispielsweise zirkulär ausgebildet und erzeugt ein Hauptmagnetfeld, welches in eine Sekundärspule eindringt, die an einem Unterboden des Elektrofahrzeugs angebracht ist. Erfindungsgemäß sind die Sensorspulen des Sensorspulensystems derart relativ zu der Primärspule angeordnet und verschaltet, dass bei Abwesenheit von durch Fremdkörper erzeugten Störmagnetfeldern in dem Sensorspulensystem keine Spannung durch das Hauptmagnetfeld induziert wird, und dass bei Anwesenheit eines durch einen Fremdkörper erzeugten Störmagnetfeldes in dem The primary coil is traversed by an alternating current with a main frequency and the main magnetic field is thus an alternating magnetic field with the same main frequency. The primary coil is, for example, circular in shape and generates a main magnetic field, which penetrates into a secondary coil, which is attached to an underbody of the electric vehicle. According to the invention, the sensor coils of the sensor coil system are arranged and interconnected relative to the primary coil in such a way that no voltage is induced by the main magnetic field in the absence of sensor-generated magnetic fields in the sensor coil system, and that in the presence of a generated by a foreign body interference magnetic field in the
Sensorspulensystem eine Spannung durch das Hauptmagnetfeld induziert wird. Sensor coil system, a voltage is induced by the main magnetic field.
Das Sensorspulensystem ist derart angeordnet, dass von Teilfeldern des Hauptmagnetfelds gegebenenfalls Teilspannungen in den einzelnen The sensor coil system is arranged such that sub-fields of the main magnetic field optionally partial voltages in the individual
Sensorspulen induziert werden. Die Sensorspulen sind jedoch derart ausgebildet und verschaltet, dass bei Abwesenheit von elektrisch leitfähigen Fremdkörpern die durch die Teilfelder des Hauptmagnetfelds induzierten Teilspannungen sich gegenseitig aufheben. An dem Sensorspulensystem ist somit theoretisch keine Spannung messbar. In der Praxis kann eine verhältnismäßig geringe Spannung messbar sein, welche unterhalb eines vorgegebenen Schwellwerts liegt. Sensor coils are induced. However, the sensor coils are designed and interconnected such that in the absence of electrically conductive foreign bodies, the partial voltages induced by the subfields of the main magnetic field cancel each other out. Thus, theoretically no voltage can be measured at the sensor coil system. In practice, a relatively low voltage can be measured, which is below a predetermined threshold.
Bei Anwesenheit eines elektrisch leitfähigen Fremdkörpers erzeugt das In the presence of an electrically conductive foreign body generates the
Hauptmagnetfeld Wirbelströme in diesem Fremdkörper, welche ein Main magnetic field eddy currents in this foreign body, which a
Störmagnetfeld erzeugen. Der Fremdkörper erzeugt somit ein Störmagnetfeld, welches sich dem Hauptmagnetfeld überlagert und dem Hauptmagnetfeld entgegen gerichtet ist. Dadurch wird das Hauptmagnetfeld lokal abgeschwächt. In diesem Fall heben sich die in dem Sensorspulensystem induzierten Generate disturbance magnetic field. The foreign body thus generates a disturbing magnetic field, which is superimposed on the main magnetic field and directed against the main magnetic field. This will weaken the main magnetic field locally. In this case, those induced in the sensor coil system cancel out
Teilspannungen nicht mehr auf. An dem Sensorspulensystem ist somit eine Spannung messbar, welche oberhalb des vorgegebenen Schwellwerts liegt. Partial voltages no longer open. On the sensor coil system thus a voltage can be measured, which is above the predetermined threshold.
Gemäß einer vorteilhaften Ausgestaltung der Erfindung weist das According to an advantageous embodiment of the invention, the
Sensorspulensystem eine Sensorspule auf, welche derart angeordnet ist, dass bei Abwesenheit von durch Fremdkörper erzeugten Störmagnetfeldern die Sensorspule von zwei Teilfeldern des Hauptmagnetfelds gleicher Feldstärke und entgegengesetzter Richtung durchflössen wird. Die zwei Teilfelder des Sensor coil system, a sensor coil which is arranged such that in the absence of interference magnetic fields generated by foreign bodies, the sensor coil of two subfields of the main magnetic field of the same field strength and opposite direction is traversed. The two subfields of the
Hauptmagnetfelds induzieren somit in der Sensorspule zwei Teilspannungen mit gleichem Betrag und entgegengesetzter Richtung, welche sich gegenseitig aufheben. An der Sensorspule des Sensorspulensystems ist somit theoretisch keine Spannung messbar. Gemäß einer anderen vorteilhaften Ausgestaltung der Erfindung weist das Sensorspulensystem mindestens zwei Sensorspulen auf, welche derart angeordnet sind, dass bei Abwesenheit von durch Fremdkörper erzeugten Störmagnetfeldern die mindestens zwei Sensorspulen von dem gleichen Teilfeld des Hauptmagnetfelds durchflössen werden. Das Teilfeld des Hauptmagnetfelds induziert somit in jeder Sensorspule die gleiche Teilspannung mit gleichem Betrag. Die Sensorspulen sind derart seriell verschaltet, dass die Main magnetic field thus induce in the sensor coil two partial voltages with the same amount and opposite direction, which cancel each other out. At the sensor coil of the sensor coil system thus theoretically no voltage can be measured. According to another advantageous embodiment of the invention, the sensor coil system has at least two sensor coils, which are arranged such that in the absence of interference magnetic fields generated by foreign bodies, the at least two sensor coils are traversed by the same subfield of the main magnetic field. The sub-field of the main magnetic field thus induces the same partial voltage with the same amount in each sensor coil. The sensor coils are connected in series such that the
Teilspannungen in entgegengesetzte Richtungen zeigen und sich gegenseitig aufheben. An dem Sensorspulensystem ist somit theoretisch keine Spannung messbar. Show partial stresses in opposite directions and cancel each other out. Thus, theoretically no voltage can be measured at the sensor coil system.
Gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung weist das Sensorspulensystem mindestens zwei Sensorspulen auf, welche derart angeordnet sind, dass bei Abwesenheit von durch Fremdkörper erzeugten Störmagnetfeldern die mindestens zwei Sensorspulen von zwei Teilfeldern desAccording to a further advantageous embodiment of the invention, the sensor coil system at least two sensor coils, which are arranged such that in the absence of interference magnetic fields generated by foreign bodies, the at least two sensor coils of two subfields of
Hauptmagnetfelds gleicher Feldstärke und entgegengesetzter Richtung durchflössen werden. Die zwei Teilfelder des Hauptmagnetfelds induzieren somit in jeder Sensorspule die gleiche Teilspannung mit gleichem Betrag. Die Main magnetic field of the same field strength and opposite direction are flowed through. The two sub-fields of the main magnetic field thus induce in each sensor coil the same sub-voltage with the same amount. The
Sensorspulen sind derart seriell verschaltet, dass die Teilspannungen in entgegengesetzte Richtungen zeigen und sich gegenseitig aufheben. An demSensor coils are connected in series in such a way that the partial voltages point in opposite directions and cancel each other out. To the
Sensorspulensystem ist somit theoretisch keine Spannung messbar. Sensor coil system is thus theoretically no voltage measurable.
Gemäß einer möglichen Ausgestaltung der Erfindung weist das According to a possible embodiment of the invention, the
Sensorspulensystem genau zwei Sensorspulen auf, welche gleichartig ausgestaltet sind. Sensor coil system exactly two sensor coils, which are configured identically.
Gemäß einer alternativen Ausgestaltung der Erfindung weist das According to an alternative embodiment of the invention, the
Sensorspulensystem mindestens zwei Sensorspulen auf, welche Sensor coil system at least two sensor coils, which
verschiedenartig ausgestaltet sind. are designed differently.
Bei der Ausgestaltung sowie bei der Dimensionierung der Sensorspulen existieren mehrere Freiheitsgrade. Insbesondere können die Anzahl von In the design and in the dimensioning of the sensor coils exist several degrees of freedom. In particular, the number of
Windungen, der Wickelsinn und die Querschnittsfläche der einzelnen Windings, the winding sense and the cross-sectional area of the individual
Sensorspulen variiert werden. Gemäß einer vorteilhaften Weiterbildung der Erfindung sind in der Sensor coils are varied. According to an advantageous embodiment of the invention are in the
erfindungsgemäßen Vorrichtung Mittel zur Erzeugung eines Sensormagnetfelds mittels des Sensorspulensystems sowie Mittel zur Bestimmung von Device according to the invention means for generating a sensor magnetic field by means of the sensor coil system and means for determining
Eigenschaften des Sensorspulensystems vorgesehen. Die Mittel zur Erzeugung eines Sensormagnetfelds umfassen insbesondere eine Wechselstromquelle oder eine Wechselspannungsquelle. Die Mittel zur Bestimmung von Eigenschaften des Sensorspulensystems umfassen beispielsweise Messgeräte zur Messung von Strom und Spannung sowie einer Phasenverschiebung zwischen Strom und Spannung. Characteristics of the sensor coil system provided. The means for generating a sensor magnetic field comprise in particular an AC power source or an AC voltage source. The means for determining properties of the sensor coil system include, for example, measuring devices for measuring current and voltage and a phase shift between current and voltage.
Es wird auch ein Verfahren zur Detektion von elektrisch leitfähigen Fremdkörpern in einer erfindungsgemäßen Vorrichtung vorgeschlagen. Dabei wird in der Vorrichtung mittels der Primärspule ein Hauptmagnetfeld zur Übertragung von Energie zu der Sekundärspule an dem Unterboden des Elektrofahrzeugs erzeugt. A method for detecting electrically conductive foreign bodies in a device according to the invention is also proposed. In this case, in the apparatus by means of the primary coil, a main magnetic field for transmitting energy to the secondary coil is generated on the underbody of the electric vehicle.
Erfindungsgemäß wird dabei eine in dem Sensorspulensystem durch das Hauptmagnetfeld induzierte Spannung gemessen. Dabei wird ein elektrisch leitfähiger Fremdkörper detektiert, wenn die gemessene Spannung einen vorgegebenen Schwellwert überschreitet. In diesem Fall bei wird auf die According to the invention, a voltage induced in the sensor coil system by the main magnetic field is measured. In this case, an electrically conductive foreign body is detected when the measured voltage exceeds a predetermined threshold. In this case, will be on the
Anwesenheit eines durch einen Fremdkörper erzeugten Störmagnetfeldes und damit auf die Anwesenheit eines elektrisch leitfähigen Fremdkörpers Presence of a disturbance magnetic field generated by a foreign body and thus the presence of an electrically conductive foreign body
geschlossen. closed.
Bei Abwesenheit von durch Fremdkörper erzeugten Störmagnetfeldern ist, bereits erwähnt, theoretisch keine Spannung an dem Sensorspulensystem messbar. In the absence of interference magnetic fields generated by foreign bodies, no voltage can theoretically be measured on the sensor coil system, as already mentioned.
Gemäß einer vorteilhaften Weiterbildung der Erfindung wird mittels des According to an advantageous embodiment of the invention is by means of
Sensorspulensystems ein Sensormagnetfeld erzeugt und Eigenschaften desSensor coil system generates a sensor magnetic field and characteristics of the
Sensorspulensystems werden bestimmt. Die Bestimmung von Eigenschaften des Sensorspulensystems stellt eine zusätzliche Möglichkeit zur Detektion von elektrisch leitfähigen Fremdkörpern in der erfindungsgemäßen Vorrichtung dar, welche von dem Hauptmagnetfeld unabhängig ist. Vorzugsweise werden dabei eine Impedanz, eine Induktivität, ein ohmscher Widerstand und/oder eine Güte des Sensorspulensystems bestimmt. Dabei werden beispielsweise Strom und Spannung sowie eine Phasenverschiebung zwischen Strom und Spannung des Sensorspulensystems gemessen. Die gewünschten Größen Impedanz, Induktivität, ohmscher Widerstand sowie Güte des Sensorspulensystems können rechnerisch aus den gemessenen Werten bestimmt werden. Sensor coil system are determined. The determination of properties of the sensor coil system represents an additional possibility for the detection of electrically conductive foreign bodies in the device according to the invention, which is independent of the main magnetic field. Preferably, an impedance, an inductance, an ohmic resistance and / or a quality of the sensor coil system are determined. For example, current and voltage as well as a phase shift between current and voltage of the sensor coil system are measured. The desired variables impedance, inductance, ohmic resistance and quality of the sensor coil system can be determined by calculation from the measured values.
Bevorzugt weist das Sensormagnetfeld dabei eine Sensorfrequenz auf, welche von der Hauptfrequenz des Hauptmagnetfelds abweicht. Dadurch ist die In this case, the sensor magnetic field preferably has a sensor frequency which deviates from the main frequency of the main magnetic field. This is the result
Bestimmung der Eigenschaften des Sensorspulensystems von dem Determining the properties of the sensor coil system of the
Hauptmagnetfeld unabhängig. Main magnetic field independent.
Vorteile der Erfindung Advantages of the invention
Die erfindungsgemäße Vorrichtung zum induktiven Laden eines Elektrofahrzeugs und das erfindungsgemäße Verfahren gestatten eine verhältnismäßig einfache Detektion von elektrisch leitfähigen Fremdkörpern in der Vorrichtung. The inventive device for inductively charging an electric vehicle and the method according to the invention allow a relatively simple detection of electrically conductive foreign bodies in the device.
Insbesondere ist es nicht erforderlich, Kennfelder des Hauptmagnetfeldes für verschiedene Betriebsfälle aufzunehmen und eine an dem Sensorspulensystem anliegende Spannung mit den Kennfeldern abzugleichen. Somit ist während des induktiven Ladens des Elektrofahrzeugs eine passive Detektion von In particular, it is not necessary to record maps of the main magnetic field for different operating cases and to match a voltage applied to the sensor coil system voltage with the maps. Thus, during inductive charging of the electric vehicle, passive detection of
Fremdkörpern durch einfache Messung einer Spannung, die durch das Foreign bodies by simply measuring a voltage caused by the
Hauptmagnetfeld induziert wird, ermöglicht. Main magnetic field is induced allows.
Zusätzlich ist eine aktive Detektion von Fremdkörpern durch Erzeugung eines Sensormagnetfelds mittels des Sensorspulensystems und Bestimmung von Eigenschaften des Sensorspulensystems ermöglicht. Besagte aktive Detektion ist dabei unabhängig von dem Hauptmagnetfeld und kann durchgeführt werden, bevor das Hauptmagnetfeld erzeugt wird, beispielsweise kurz vor Beginn eines Ladevorgangs. Die aktive Detektion kann auch parallel zum induktiven Laden des Elektrofahrzeugs erfolgen. Das Hauptmagnetfeld induziert keine In addition, an active detection of foreign bodies by generating a sensor magnetic field by means of the sensor coil system and determination of properties of the sensor coil system is made possible. Said active detection is independent of the main magnetic field and can be carried out before the main magnetic field is generated, for example shortly before the beginning of a charging process. The active detection can also take place in parallel with the inductive charging of the electric vehicle. The main magnetic field does not induce
Störspannungen, welche die Mittel zur Bestimmung von Eigenschaften des Sensorspulensystems beeinflussen. Insbesondere ist eine Entkopplung des Hauptmagnetfeldes und des Sensormagnetfeldes möglich, wenn beide Magnetfelder unterschiedliche Frequenzen aufweisen. Noise voltages which influence the means for determining properties of the sensor coil system. In particular, a decoupling of Main magnetic field and the sensor magnetic field possible if both magnetic fields have different frequencies.
Auch ferritische Fremdkörper können mittels der erfindungsgemäßen Vorrichtu sowie durch das erfindungsgemäße Verfahren detektiert werden. Ferritische Fremdkörper verursachen dabei eine lokale Verstärkung und eine lokale Abschwächung des Hauptmagnetfelds. Ferritic foreign bodies can also be detected by means of the device according to the invention and by the method according to the invention. Ferritic foreign bodies cause a local amplification and a local weakening of the main magnetic field.
Kurze Beschreibung der Zeichnungen Brief description of the drawings
Ausführungsformen der Erfindung werden anhand der Zeichnungen und der nachfolgenden Beschreibung näher erläutert. Embodiments of the invention will be explained in more detail with reference to the drawings and the description below.
Es zeigen: Show it:
Figur 1 eine schematische Darstellung eines Elektrofahrzeugs und einer Figure 1 is a schematic representation of an electric vehicle and a
Vorrichtung zum induktiven Laden des Elektrofahrzeugs,  Device for inductively charging the electric vehicle,
Figur 2 eine schematische Draufsicht auf ein Hauptmagnetfeld einer Figure 2 is a schematic plan view of a main magnetic field of a
Vorrichtung gemäß einer ersten Ausführungsform,  Device according to a first embodiment,
Figur 3 eine schematische Draufsicht auf ein Hauptmagnetfeld einer Figure 3 is a schematic plan view of a main magnetic field of a
Vorrichtung gemäß einer zweiten Ausführungsform,  Device according to a second embodiment,
Figur 4 eine schematische Draufsicht auf ein Hauptmagnetfeld einer Figure 4 is a schematic plan view of a main magnetic field of a
Vorrichtung gemäß einer dritten Ausführungsform,  Device according to a third embodiment,
Figur 5 eine schematische Draufsicht auf ein Hauptmagnetfeld einer Figure 5 is a schematic plan view of a main magnetic field of a
Vorrichtung gemäß einer vierten Ausführungsform und  Device according to a fourth embodiment and
Figur 6 eine schematische Draufsicht auf ein Hauptmagnetfeld einer Figure 6 is a schematic plan view of a main magnetic field of a
Vorrichtung gemäß einer fünften Ausführungsform.  Device according to a fifth embodiment.
Ausführungsformen der Erfindung In der nachfolgenden Beschreibung der Ausführungsformen der Erfindung werden gleiche oder ähnliche Elemente mit gleichen Bezugszeichen bezeichnet, wobei auf eine wiederholte Beschreibung dieser Elemente in Einzelfällen verzichtet wird. Die Figuren stellen den Gegenstand der Erfindung nur schematisch dar. Embodiments of the invention In the following description of the embodiments of the invention, the same or similar elements are denoted by the same reference numerals, wherein a repeated description of these elements is dispensed with in individual cases. The figures illustrate the subject matter of the invention only schematically.
In Figur 1 ist ein Elektrofahrzeug 17, welches über einer Vorrichtung zum induktiven Laden des Elektrofahrzeugs 17 abgestellt ist, schematisch dargestellt. Eine solche Vorrichtung wird auch als induktive Ladestation bezeichnet. Die Vorrichtung zum induktiven Laden des Elektrofahrzeugs 17 befindet sich auf einem Boden 15 unterhalb des Elektrofahrzeugs 17 und umfasst eine 1 shows an electric vehicle 17, which is placed over a device for inductive charging of the electric vehicle 17, shown schematically. Such a device is also referred to as inductive charging station. The device for inductively charging the electric vehicle 17 is located on a floor 15 below the electric vehicle 17 and includes a
Primärspule 11 zur Erzeugung eines Hauptmagnetfeldes 10. Primary coil 11 for generating a main magnetic field 10th
An einem Unterboden 16 des Elektrofahrzeugs 17 ist eine Sekundärspule 12 angebracht. Das Elektrofahrzeug 17 ist vorliegend derart abgestellt, dass dieOn an underbody 16 of the electric vehicle 17, a secondary coil 12 is mounted. The electric vehicle 17 is in the present case turned off so that the
Sekundärspule 12 weitestgehend über der Primärspule 11 angeordnet ist. Das von der Primärspule 11 erzeugte Hauptmagnetfeld 10 durchdringt somit die Sekundärspule 12, wodurch Energie von der Primärspule 11 zu der Secondary coil 12 is arranged largely over the primary coil 11. The main magnetic field 10 generated by the primary coil 11 thus penetrates the secondary coil 12, whereby energy from the primary coil 11 to the
Sekundärspule 12 des Elektrofahrzeugs 17 induktiv übertragen wird. Die Secondary coil 12 of the electric vehicle 17 is transmitted inductively. The
Sekundärspule 12 nimmt die von der Primärspule 11 übertragene Energie auf und lädt eine Traktionsbatterie 18 des Elektrofahrzeugs 17. Secondary coil 12 receives the energy transmitted from the primary coil 11 and charges a traction battery 18 of the electric vehicle 17.
Aufgrund der erforderlichen Bodenfreiheit des Elektrofahrzeugs 17 besteht zwischen dem Boden 15 und dem Unterboden 16 des Elektrofahrzeugs 17 ein Zwischenraum 14 mit einem Luftspalt, welcher mehrere Zentimeter beträgt. DerDue to the required ground clearance of the electric vehicle 17 is between the bottom 15 and the bottom 16 of the electric vehicle 17, a gap 14 with an air gap which is several centimeters. Of the
Zwischenraum 14 mit dem Luftspalt erstreckt sich auch zwischen der Gap 14 with the air gap also extends between the
Primärspule 11 und der Sekundärspule 12. Die Primärspule 11 und die Primary coil 11 and the secondary coil 12. The primary coil 11 and the
Sekundärspule 12 sind also beabstandet voneinander abgeordnet. Die Vorrichtung zum induktiven Laden des Elektrofahrzeugs 17 umfasst auch einSecondary coil 12 are thus spaced apart from each other. The device for inductively charging the electric vehicle 17 also includes
Sensorspulensystem 30 zur Detektion von elektrisch leitfähigen Fremdkörpern, welche in dem Zwischenraum 14 zwischen der Primärspule 11 und der Sensor coil system 30 for detecting electrically conductive foreign bodies, which in the intermediate space 14 between the primary coil 11 and the
Sekundärspule 12 befinden können. Das Sensorspulensystem 30 weist dabei eine oder mehrere Sensorspulen 31, 32, 33 auf, welche vorliegend auf der Primärspule 11 und in dem Zwischenraum 14 angeordnet sind. Die Primärspule 11 ist vorliegend annähernd als Ringspule oder Zirkularspule ausgebildet. In der hier gezeigten Darstellung ist das Hauptmagnetfeld 10 durch eingezeichnete Feldlinien abgebildet. Die Feldlinien des von der Primärspule 11 erzeugten Hauptmagnetfelds 10 durchdringen dabei die Primärspule 11 und dieSecondary coil 12 can be located. The sensor coil system 30 in this case has one or more sensor coils 31, 32, 33, which are presently arranged on the primary coil 11 and in the intermediate space 14. The primary coil 11 is presently formed approximately as an annular coil or circular coil. In the illustration shown here, the main magnetic field 10 is depicted by drawn field lines. The field lines of the main magnetic field 10 generated by the primary coil 11 penetrate the primary coil 11 and the
Sekundärspule 12 und schließen sich außerhalb der Primärspule 11 und der Sekundärspule 12 wieder. Secondary coil 12 and close outside of the primary coil 11 and the secondary coil 12 again.
Die Primärspule 11 wird von einem Wechselstrom mit einer Hauptfrequenz durchflössen und das Hauptmagnetfeld 10 ist somit ein alternierendes The primary coil 11 is traversed by an alternating current with a main frequency and the main magnetic field 10 is thus an alternating
Magnetfeld mit der gleichen Hauptfrequenz von beispielsweise 85 kHz. In der gezeigten Darstellung ist das Hauptmagnetfeld 10 zu einem definierten  Magnetic field with the same main frequency of, for example, 85 kHz. In the illustration shown, the main magnetic field 10 is to a defined
Zeitpunkt, also statisch, gezeigt. Dabei umfasst das Hauptmagnetfeld 10 ein erstes Teilfeld 21, in welchem dieTime, that is static, shown. In this case, the main magnetic field 10 comprises a first subfield 21, in which the
Feldlinien des Hauptmagnetfelds 10 annähernd senkrecht von dem Boden 15 zu dem Unterboden 16 des Elektrofahrzeugs 17, also nach oben, verlaufen. Ferner umfasst das Hauptmagnetfeld 10 ein zweites Teilfeld 22, in welchem die Feldlinien des Hauptmagnetfelds 10 annähernd senkrecht von dem Unterboden 16 des Elektrofahrzeugs 17 zu dem Boden 15, also nach unten, verlaufen.Field lines of the main magnetic field 10 approximately perpendicularly from the bottom 15 to the lower floor 16 of the electric vehicle 17, so upwards, run. Furthermore, the main magnetic field 10 comprises a second subfield 22 in which the field lines of the main magnetic field 10 extend approximately perpendicularly from the underbody 16 of the electric vehicle 17 to the ground 15, that is to say downwards.
Unabhängig von der hier gezeigten Darstellung sind die beiden Teilfelder 21, 22 des Hauptmagnetfelds 10 zu jedem Zeitpunkt entgegengesetzt gerichtet und weise eine gleiche Feldstärke auf. Figur 2 zeigt eine schematische Draufsicht auf das Hauptmagnetfeld 10 einerRegardless of the representation shown here, the two sub-fields 21, 22 of the main magnetic field 10 are directed opposite at any time and have the same field strength. Figure 2 shows a schematic plan view of the main magnetic field 10 of a
Vorrichtung gemäß einer ersten Ausführungsform. Das Sensorspulensystem 30 weist eine erste Sensorspule 31 auf, welche derart angeordnet ist, dass die erste Sensorspule 31 gleichmäßig von dem ersten Teilfeld 21 und von dem zweiten Teilfeld 22 durchflössen wird. Device according to a first embodiment. The sensor coil system 30 has a first sensor coil 31, which is arranged such that the first sensor coil 31 is uniformly flowed through by the first sub-field 21 and by the second sub-field 22.
Das erste Teilfeld 21 und das zweite Teilfeld 22 induzieren somit in der ersten Sensorspule 31 zwei Teilspannungen mit gleichem Betrag und The first subfield 21 and the second subfield 22 thus induce in the first sensor coil 31 two sub-voltages of the same magnitude and
entgegengesetzter Richtung, welche sich gegenseitig aufheben. An der ersten Sensorspule 31 des Sensorspulensystems 30 ist somit theoretisch keine Spannung messbar. Figur 3 zeigt eine schematische Draufsicht auf das Hauptmagnetfeld 10 einer Vorrichtung gemäß einer zweiten Ausführungsform. Das Sensorspulensystem 30 weist eine erste Sensorspule 31 und eine zweite Sensorspule 32 auf, welche derart angeordnet sind, dass die erste Sensorspule 31 und die zweite opposite direction, which cancel each other out. Thus theoretically no voltage can be measured at the first sensor coil 31 of the sensor coil system 30. FIG. 3 shows a schematic plan view of the main magnetic field 10 of a device according to a second embodiment. The sensor coil system 30 has a first sensor coil 31 and a second sensor coil 32, which are arranged such that the first sensor coil 31 and the second
Sensorspule 32 von dem zweiten Teilfeld 22 durchflössen werden. Die erste Sensorspule 31 und die zweite Sensorspule 32 sind gleichartig aufgebaut und weisen insbesondere die gleiche Anzahl von Windungen und die gleiche Querschnittsfläche auf. Sensor coil 32 are flowed through by the second subfield 22. The first sensor coil 31 and the second sensor coil 32 are of similar construction and in particular have the same number of turns and the same cross-sectional area.
Das zweite Teilfeld 22 induziert somit in der ersten Sensorspule 31 und in der zweiten Sensorspule 32 die gleiche Teilspannung mit gleichem Betrag. Die erste Sensorspule 31 und die zweite Sensorspule 32 sind derart seriell verschaltet, dass die Teilspannungen in entgegengesetzte Richtungen zeigen und sich gegenseitig aufheben. An dem Sensorspulensystem 30 ist somit theoretisch keine Spannung messbar. The second subfield 22 thus induces in the first sensor coil 31 and in the second sensor coil 32 the same sub-voltage with the same amount. The first sensor coil 31 and the second sensor coil 32 are connected in series in such a way that the partial voltages point in opposite directions and cancel each other out. At the sensor coil system 30 thus theoretically no voltage can be measured.
Figur 4 zeigt eine schematische Draufsicht auf das Hauptmagnetfeld 10 einer Vorrichtung gemäß einer dritten Ausführungsform. Das Sensorspulensystem 30 weist eine erste Sensorspule 31 und eine zweite Sensorspule 32 auf, welche derart angeordnet sind, dass die erste Sensorspule 31 von dem ersten Teilfeld 21 durchflössen wird und die zweite Sensorspule 32 von dem zweiten Teilfeld 22 durchflössen wird. Die erste Sensorspule 31 und die zweite Sensorspule 32 sind gleichartig aufgebaut und weisen insbesondere die gleiche Anzahl von Figure 4 shows a schematic plan view of the main magnetic field 10 of a device according to a third embodiment. The sensor coil system 30 has a first sensor coil 31 and a second sensor coil 32, which are arranged such that the first sensor coil 31 is flowed through by the first sub-field 21 and the second sensor coil 32 is flowed through by the second sub-field 22. The first sensor coil 31 and the second sensor coil 32 are of similar construction and in particular have the same number of
Windungen und die gleiche Querschnittsfläche auf. Turns and the same cross-sectional area.
Das erste Teilfeld 21 und das zweite Teilfeld 22 induzieren somit in der ersten Sensorspule 31 und in der zweiten Sensorspule 32 die gleiche Teilspannung mit gleichem Betrag. Die erste Sensorspule 31 und die zweite Sensorspule 32 sind derart seriell verschaltet, dass die Teilspannungen in entgegengesetzte The first subfield 21 and the second subfield 22 thus induce in the first sensor coil 31 and in the second sensor coil 32, the same partial voltage with the same amount. The first sensor coil 31 and the second sensor coil 32 are connected in series such that the partial voltages in opposite
Richtungen zeigen und sich gegenseitig aufheben. An dem Sensorspulensystem 30 ist somit theoretisch keine Spannung messbar. Show directions and cancel each other out. At the sensor coil system 30 thus theoretically no voltage can be measured.
Figur 5 zeigt eine schematische Draufsicht auf das Hauptmagnetfeld 10 einer Vorrichtung gemäß einer vierten Ausführungsform. Das Sensorspulensystem 30 weist eine erste Sensorspule 31, eine zweite Sensorspule 32 und eine dritte Sensorspule 33 auf, welche derart angeordnet sind, dass die erste SensorspuleFIG. 5 shows a schematic plan view of the main magnetic field 10 of a device according to a fourth embodiment. The sensor coil system 30 has a first sensor coil 31, a second sensor coil 32 and a third sensor coil 33, which are arranged such that the first sensor coil
31 von dem ersten Teilfeld 21 durchflössen wird und die zweite Sensorspule 32 und die dritte Sensorspule 33 von dem zweiten Teilfeld 22 durchflössen werden. Die zweite Sensorspule 32 und dritte Sensorspule 33 sind gleichartig aufgebaut und weisen insbesondere die gleiche Anzahl von Windungen und die gleiche Querschnittsfläche auf. Die erste Sensorspule 31 ist davon verschieden aufgebaut und weist insbesondere die doppelte Anzahl von Windungen wie die zweite Sensorspule 32 und die dritte Sensorspule 33 auf. 31 is flowed through by the first subfield 21 and the second sensor coil 32 and the third sensor coil 33 are traversed by the second subfield 22. The second sensor coil 32 and third sensor coil 33 are of similar construction and in particular have the same number of turns and the same cross-sectional area. The first sensor coil 31 has a different structure therefrom and in particular has twice the number of turns as the second sensor coil 32 and the third sensor coil 33.
Das erste Teilfeld 21 induziert dabei in der ersten Sensorspule 31 eine The first subfield 21 induces a in the first sensor coil 31 a
Teilspannung. Das zweite Teilfeld 22 induziert in der zweiten Sensorspule 32 und in der dritten Sensorspule 33, welche seriell verschaltet sind die gleiche Part voltage. The second subfield 22 induces the same in the second sensor coil 32 and in the third sensor coil 33, which are connected in series
Teilspannung mit gleichem Betrag. Die erste Sensorspule 31 ist mit der zweiten Sensorspule 32 und mit der dritten Sensorspule 33 derart seriell verschaltet, dass die Teilspannungen in entgegengesetzte Richtungen zeigen und sich gegenseitig aufheben. An dem Sensorspulensystem 30 ist somit theoretisch keine Spannung messbar. Figur 6 zeigt eine schematische Draufsicht auf das Hauptmagnetfeld 10 einerPartial voltage with the same amount. The first sensor coil 31 is connected in series with the second sensor coil 32 and with the third sensor coil 33 in such a way that the partial voltages point in opposite directions and cancel each other out. At the sensor coil system 30 thus theoretically no voltage can be measured. FIG. 6 shows a schematic plan view of the main magnetic field 10 of FIG
Vorrichtung gemäß einer fünften Ausführungsform. Das Sensorspulensystem 30 weist eine erste Sensorspule 31 und eine zweite Sensorspule 32 auf, welche derart angeordnet sind, dass die erste Sensorspule 31 und die zweite Device according to a fifth embodiment. The sensor coil system 30 has a first sensor coil 31 and a second sensor coil 32, which are arranged such that the first sensor coil 31 and the second
Sensorspule 32 von dem ersten Teilfeld 21 durchflössen werden. Die erste Sensorspule 31 und die zweite Sensorspule 32 sind dabei konzentrisch übereinander angeordnet. Die erste Sensorspule 31 und die zweite SensorspuleSensor coil 32 are flowed through by the first sub-field 21. The first sensor coil 31 and the second sensor coil 32 are arranged concentrically one above the other. The first sensor coil 31 and the second sensor coil
32 sind gleichartig aufgebaut und weisen insbesondere die gleiche Anzahl von Windungen und die gleiche Querschnittsfläche auf. Die Windungen der ersten Sensorspule 31 und der zweiten Sensorspule 32 weisen jedoch 32 are of similar construction and in particular have the same number of turns and the same cross-sectional area. However, the turns of the first sensor coil 31 and the second sensor coil 32 have
unterschiedlichen Wickelsinn auf. different winding sense on.
Das erste Teilfeld 21 induziert somit in der ersten Sensorspule 31 und in der zweiten Sensorspule 32 die gleiche Teilspannung mit gleichem Betrag. Die erste Sensorspule 31 und die zweite Sensorspule 32 sind derart seriell verschaltet, dass die Teilspannungen in entgegengesetzte Richtungen zeigen und sich gegenseitig aufheben. An dem Sensorspulensystem 30 ist somit theoretisch keine Spannung messbar. The first subfield 21 thus induces in the first sensor coil 31 and in the second sensor coil 32 the same sub-voltage with the same amount. The first sensor coil 31 and the second sensor coil 32 are connected in series in such a way that the partial voltages point in opposite directions and cancel each other out. At the sensor coil system 30 thus theoretically no voltage can be measured.
Die Erfindung ist nicht auf die hier beschriebenen Ausführungsbeispiele und die darin hervorgehobenen Aspekte beschränkt. Vielmehr ist innerhalb des durch dieThe invention is not limited to the embodiments described herein and the aspects highlighted therein. Rather, within the by the
Ansprüche angegebenen Bereichs eine Vielzahl von Abwandlungen möglich, die im Rahmen fachmännischen Handelns liegen. Claims specified range a variety of modifications possible, which are within the scope of expert action.

Claims

Ansprüche claims
1. Vorrichtung zum induktiven Laden eines Elektrofahrzeugs (17), 1. Device for inductively charging an electric vehicle (17),
umfassend  full
eine Primärspule (11) zur Erzeugung eines Hauptmagnetfeldes (10) und ein Sensorspulensystem (30) zur Detektion von elektrisch leitfähigen Fremdkörpern, das mindestens eine Sensorspule (31, 32, 33) aufweist, dadurch gekennzeichnet, dass  a primary coil (11) for generating a main magnetic field (10) and a sensor coil system (30) for detecting electrically conductive foreign bodies, the at least one sensor coil (31, 32, 33), characterized in that
die Sensorspulen (31, 32, 33) derart relativ zu der Primärspule (11) angeordnet und verschaltet sind, dass  the sensor coils (31, 32, 33) are arranged and interconnected relative to the primary coil (11) such that
bei Abwesenheit von durch Fremdkörper erzeugten Störmagnetfeldern in dem Sensorspulensystem (30) keine Spannung durch das  in the absence of foreign object generated disturbance magnetic fields in the sensor coil system (30) no voltage through the
Hauptmagnetfeld (10) induziert wird, und dass  Main magnetic field (10) is induced, and that
bei Anwesenheit eines durch einen Fremdkörper erzeugten  in the presence of a foreign body generated
Störmagnetfeldes  noise magnetic field
in dem Sensorspulensystem (30) eine Spannung durch das  in the sensor coil system (30) a voltage through the
Hauptmagnetfeld (10) induziert wird.  Main magnetic field (10) is induced.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass 2. Apparatus according to claim 1, characterized in that
das Sensorspulensystem (30) eine Sensorspule (31) aufweist, welche derart angeordnet ist, dass  the sensor coil system (30) has a sensor coil (31) which is arranged such that
bei Abwesenheit von durch Fremdkörper erzeugten Störmagnetfeldern die Sensorspule (31) von zwei Teilfeldern (21, 22) des  in the absence of interference magnetic fields generated by foreign bodies, the sensor coil (31) of two subfields (21, 22) of the
Hauptmagnetfelds (10) gleicher Feldstärke und entgegengesetzter Richtung durchflössen wird. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass Main magnetic field (10) of the same field strength and opposite direction is flowed through. Device according to one of the preceding claims, characterized in that
das Sensorspulensystem (30) mindestens zwei Sensorspulen (31, 32) aufweist, welche derart angeordnet sind, dass the sensor coil system (30) has at least two sensor coils (31, 32), which are arranged such that
bei Abwesenheit von durch Fremdkörper erzeugten Störmagnetfeldern die mindestens zwei Sensorspulen (31, 32) von dem gleichen Teilfeld (21, 22) des Hauptmagnetfelds (10) durchflössen werden. in the absence of interference magnetic fields generated by foreign bodies, the at least two sensor coils (31, 32) of the same subfield (21, 22) of the main magnetic field (10) are flowed through.
Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass Device according to one of the preceding claims, characterized in that
das Sensorspulensystem (30) mindestens zwei Sensorspulen (31, 32) aufweist, welche derart angeordnet sind, dass the sensor coil system (30) has at least two sensor coils (31, 32), which are arranged such that
bei Abwesenheit von durch Fremdkörper erzeugten Störmagnetfeldern die mindestens zwei Sensorspulen (31, 32) von zwei Teilfeldern (21, 22) des Hauptmagnetfelds (10) gleicher Feldstärke und entgegengesetzter Richtung durchflössen werden. in the absence of interference magnetic fields generated by foreign bodies, the at least two sensor coils (31, 32) of two sub-fields (21, 22) of the main magnetic field (10) of the same field strength and opposite direction are traversed.
Vorrichtung nach einem der Ansprüche 3 bis 4, dadurch Device according to one of claims 3 to 4, characterized
gekennzeichnet, dass marked that
das Sensorspulensystem (30) genau zwei Sensorspulen (31, 32) aufweist, welche gleichartig ausgestaltet sind. the sensor coil system (30) has exactly two sensor coils (31, 32), which are configured identically.
Vorrichtung nach einem der Ansprüche 3 bis 4, dadurch Device according to one of claims 3 to 4, characterized
gekennzeichnet, dass marked that
das Sensorspulensystem (30) mindestens zwei Sensorspulen (31, 32) aufweist, welche verschiedenartig ausgestaltet sind. the sensor coil system (30) has at least two sensor coils (31, 32), which are designed differently.
Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass Device according to one of the preceding claims, characterized in that
Mittel zur Erzeugung eines Sensormagnetfelds mittels des  Means for generating a sensor magnetic field by means of
Sensorspulensystems (30) sowie Sensor coil system (30) and
Mittel zur Bestimmung von Eigenschaften des Sensorspulensystems (30) vorgesehen sind. Means are provided for determining properties of the sensor coil system (30).
8. Verfahren zur Detektion von elektrisch leitfähigen Fremdkörpern in einer Vorrichtung nach einem der vorstehenden Ansprüche, wobei mittels der Primärspule (11) ein Hauptmagnetfeld (10) erzeugt wird, dadurch gekennzeichnet, dass 8. A method for detecting electrically conductive foreign bodies in a device according to one of the preceding claims, wherein by means of the primary coil (11), a main magnetic field (10) is generated, characterized in that
eine in dem Sensorspulensystem (30) durch das Hauptmagnetfeld (10) induzierte Spannung gemessen wird, und dass  a voltage induced in the sensor coil system (30) by the main magnetic field (10) is measured, and in that
ein elektrisch leitfähiger Fremdkörper detektiert wird, wenn die gemessene Spannung einen vorgegebenen Schwellwert überschreitet.  an electrically conductive foreign body is detected when the measured voltage exceeds a predetermined threshold.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass 9. The method according to claim 8, characterized in that
mittels des Sensorspulensystems (30) ein Sensormagnetfeld erzeugt wird, und dass Eigenschaften des Sensorspulensystems (30) bestimmt werden.  a sensor magnetic field is generated by means of the sensor coil system (30), and properties of the sensor coil system (30) are determined.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass 10. The method according to claim 9, characterized in that
eine Impedanz, eine Induktivität, ein Widerstand und/oder eine Güte des Sensorspulensystems (30) bestimmt werden.  an impedance, an inductance, a resistance and / or a quality of the sensor coil system (30) are determined.
11. Verfahren nach einem der Ansprüche 9 bis 10, dadurch gekennzeichnet, dass 11. The method according to any one of claims 9 to 10, characterized in that
das Sensormagnetfeld eine Sensorfrequenz aufweist, welche von der Hauptfrequenz des Hauptmagnetfelds (10) abweicht.  the sensor magnetic field has a sensor frequency which deviates from the main frequency of the main magnetic field (10).
EP17780707.0A 2016-11-16 2017-10-04 Device for inductively charging an electric vehicle, and method for detecting electrically conductive foreign bodies in such a device Withdrawn EP3542443A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016222554.5A DE102016222554A1 (en) 2016-11-16 2016-11-16 Device for inductively charging an electric vehicle and method for detecting electrically conductive foreign bodies in such a device
PCT/EP2017/075131 WO2018091192A1 (en) 2016-11-16 2017-10-04 Device for inductively charging an electric vehicle, and method for detecting electrically conductive foreign bodies in such a device

Publications (1)

Publication Number Publication Date
EP3542443A1 true EP3542443A1 (en) 2019-09-25

Family

ID=60037590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17780707.0A Withdrawn EP3542443A1 (en) 2016-11-16 2017-10-04 Device for inductively charging an electric vehicle, and method for detecting electrically conductive foreign bodies in such a device

Country Status (6)

Country Link
US (1) US20190308516A1 (en)
EP (1) EP3542443A1 (en)
KR (1) KR20190077526A (en)
CN (1) CN110062714A (en)
DE (1) DE102016222554A1 (en)
WO (1) WO2018091192A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018201824A1 (en) * 2018-02-06 2019-08-08 Robert Bosch Gmbh Inductive charging device and method for monitoring an inductive charging device
US11469625B2 (en) 2019-11-18 2022-10-11 Samsung Electronics Co., Ltd. Electronic device for wirelessly transmitting power and method of operating the same
CN110884370B (en) * 2019-12-06 2021-05-28 兰州理工大学 Conductor foreign matter detection device for wireless charging device of electric vehicle
CN113103887B (en) * 2021-04-08 2022-11-22 中国第一汽车股份有限公司 Charging pairing method and device, electronic equipment, system and storage medium

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013189530A1 (en) * 2012-06-20 2013-12-27 Siemens Aktiengesellschaft Detection coil assembly, energy transfer coil assembly and detection system for detecting electrically conductive foreign bodies
EP2712762B1 (en) * 2012-09-28 2021-09-01 Valeo Siemens eAutomotive Germany GmbH Positioning system and method for positioning a vehicle
DE102012112959A1 (en) * 2012-12-21 2014-06-26 Robert Bosch Gmbh Induction charging device
DE102013219678A1 (en) 2013-09-30 2015-04-02 Robert Bosch Gmbh Method and device for determining a foreign object in a spatial area
DE102013223794A1 (en) 2013-11-21 2015-05-21 Robert Bosch Gmbh Energy transmission system and method for diagnosing a power transmission system
DE102014205598A1 (en) * 2014-03-26 2015-10-01 Robert Bosch Gmbh Monitoring device for at least one designed for inductive power transmission electrical device and method for monitoring at least a sub-environment of at least one designed for inductive power transmission electrical device

Also Published As

Publication number Publication date
CN110062714A (en) 2019-07-26
KR20190077526A (en) 2019-07-03
DE102016222554A1 (en) 2018-05-17
WO2018091192A1 (en) 2018-05-24
US20190308516A1 (en) 2019-10-10

Similar Documents

Publication Publication Date Title
EP3542443A1 (en) Device for inductively charging an electric vehicle, and method for detecting electrically conductive foreign bodies in such a device
WO2013143926A1 (en) Device for inductive power transmission
EP2753899B1 (en) Amplitude evaluation by means of a goertzel algorithm in a differential transformer displacement sensor
EP3131779B1 (en) Apparatus and method for detecting an interfering body in a system for inductive energy transmission and system for inductive energy transmission
DE102013219131B4 (en) Device and method for detecting a foreign body in a magnetic field intended for conduction-free energy transfer
WO2015144335A1 (en) Manufacturer-independent positioning system for an inductive charging process
DE102013016880A1 (en) Method for positioning vehicle e.g. hybrid car, at inductive charging station to charge traction battery of vehicle, involves guiding vehicle on charging places of charging station depending on determined position of vehicle
WO2013143939A1 (en) Device for inductively transmitting power
DE102014210589A1 (en) Residual current protection device, charging device and method for checking a residual current device
WO2017092950A1 (en) Method for operating a monitoring device for monitoring an inductive energy transmission device
EP0141219B1 (en) Method and apparatus for guiding a trackless vehicle along its way
WO2015051877A1 (en) Method for interference-free operation of a vehicle key card for a vehicle comprising an inductive vehicle charging device
WO2020099204A1 (en) Method for operating an inductive charging system
DE102015221587A1 (en) Charging device for inductively charging an electrical energy storage device of a motor vehicle with a foreign body detection device
DE102015221585B3 (en) Method for operating a charging device for inductively charging an electrical energy storage device of a motor vehicle, charging device and arrangement
DE2608395A1 (en) INDUCTIVE APPROXIMATE SECURITY INITIATOR
DE102022107569A1 (en) Method for positioning a vehicle
DE10253864A1 (en) Star connected stator virtual earth connection monitoring procedure for electrical machines uses difference processing with optimized digital filter of null voltage and coil current measurements
EP2779030B1 (en) Coil inductance
WO2024038056A1 (en) Sensor system for a vehicle
WO2018233926A1 (en) Component of an inductive energy transmission apparatus with object recognition and method for operating an inductive energy transmission apparatus
DE102013218617A1 (en) Coil arrangement for inductive power transmission and method for detecting a foreign object between a transmitting coil and a receiving coil
EP3421288A1 (en) Charging system for a battery-operated industrial truck and method for inductively charging a battery-operated industrial truck
EP3569467B1 (en) Sensor for detecting metal parts and method for reducing a magnetic field
WO2024038093A1 (en) Method for positioning a vehicle

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20190617

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROBERT BOSCH GMBH

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20200108