WO2018091191A1 - Dispositif pour un système de transmission d'énergie par induction, système de transmission d'énergie par induction et dispositif de charge pour un accumulateur d'énergie électrique - Google Patents

Dispositif pour un système de transmission d'énergie par induction, système de transmission d'énergie par induction et dispositif de charge pour un accumulateur d'énergie électrique Download PDF

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Publication number
WO2018091191A1
WO2018091191A1 PCT/EP2017/075128 EP2017075128W WO2018091191A1 WO 2018091191 A1 WO2018091191 A1 WO 2018091191A1 EP 2017075128 W EP2017075128 W EP 2017075128W WO 2018091191 A1 WO2018091191 A1 WO 2018091191A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrically conductive
shielding
elements
secondary coil
receiving device
Prior art date
Application number
PCT/EP2017/075128
Other languages
German (de)
English (en)
Inventor
Ulrich Brenner
Achim Henkel
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 WO2018091191A1 publication Critical patent/WO2018091191A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • 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
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • the present invention relates to a receiving and transmitting device for an inductive power transmission system, as well as an inductive
  • Document DE 10 2011 010 049 A1 discloses a charging device and a method for charging a battery of an electric vehicle.
  • the battery of the electric vehicle is in this case transmitted by means of an inductive energy transfer from a primary coil to a secondary coil.
  • inductive energy transmission As used for example for charging accumulators, high-frequency magnetic fields are often used. This makes it possible to dispense with a plug connection for a galvanic connection between a charging station and the vehicle with the accumulator.
  • inductive energy transmission is transmitted via an air gap between a secondary coil, which is connected via a suitable circuit to an electrical energy storage device, such as a battery, and a primary coil which is electrically coupled to a charging station, electrical energy according to the principle of a transformer .
  • an electrical energy storage device such as a battery
  • a primary coil which is electrically coupled to a charging station
  • Metal field of inductive power transmission shields This can be electrical Conductive materials are used by their eddy currents
  • the present invention discloses a receiving device for an inductive power transmission system having the features of claim 1, an inductive power transmission system having the features of claim 9 and a charging device for an electrical energy storage with the
  • a receiving device for an inductive power transmission system a receiving device for an inductive power transmission system.
  • Receiving device comprises a secondary coil and a
  • the secondary coil is designed with a
  • the shielding device comprises at least two electrically conductive shielding elements.
  • the at least two electrically conductive screen elements are arranged electrically isolated from each other.
  • the primary coil is designed to be a
  • This alternating field can couple into the secondary coil. As a result, an electric current can be induced in the secondary coil.
  • the present invention is based on the finding that large-area electrically conductive shielding plates, which shield a receiving coil of an inductive energy transmission system, allow a capacitive coupling of electrical energy. This capacitive coupling leads to an electrical charging of the shield and thus possibly also to charge a housing or vehicle electrically coupled to the shield.
  • the electrical energy coupled in this way can, if necessary, be dissipated via this person when touched by a human.
  • the present invention is therefore based on the idea to take this knowledge into account and provide a shield for the secondary coil of an inductive energy transmission system, which capacitive
  • Couplings minimized or possibly completely eliminated.
  • it is intended to realize the shielding by a plurality of smaller electrically conductive shielding elements and to electrically isolate the individual shielding elements from one another.
  • the shielding device of the receiving device is arranged on one side of the secondary coil, which faces away from the primary coil during an inductive energy transmission.
  • the alternating magnetic field provided by the primary coil can freely couple into the secondary coil.
  • the electrically conductive screen elements are arranged on two opposite sides of the electrically insulating carrier substrate. As a result, an almost complete shielding is made possible by the electrically conductive screen elements.
  • the electrically conductive shielding elements are overlapping but insulated from each other.
  • the electrically conductive shielding elements are arranged in an electrically insulating potting compound.
  • the electrically conductive screen elements and the secondary coil can be arranged in a common potting compound.
  • the electrically conductive member is electrically conductive
  • Shield elements electrically conductive particles.
  • the minimum size of the individual screen elements, which can also be formed, for example, by electrically conductive particles, must be so large that the shield effect is not lost for a shielding of the magnetic fields. For this purpose must be in In each case, sufficiently large eddy currents can still be induced by the shielding magnetic field to the individual screen elements.
  • the area which is formed by the electrically conductive screen elements in their entirety at least as large as an outer dimension of the secondary coil.
  • Total area which is formed by the electrically conductive screen elements corresponding to at least one size, which by a projection of the secondary coil in the direction of the main magnetic field lines on the
  • Shielding device is formed. The through the electrically conductive
  • the surface area formed by the shield elements can in particular also be greater than the corresponding outer dimension of the secondary coil.
  • this shielding can also be used on the primary-side transmitting coil.
  • the shield is expediently mounted on the receiving coil side facing away from the transmitting coil. As a result, only the magnetic field outside the energy transfer can be shielded.
  • Figure 1 a schematic representation of a charging device for an electrical energy storage with an inductive
  • Figure 2-5 schematic representations of shielding for a
  • Receiving device according to possible embodiments.
  • FIG. 1 shows a schematic representation of a charging device for an electrical energy store 4 according to an embodiment.
  • Charging device comprises an electric power transmission system with the primary coil 5 and the secondary coil 2.
  • the primary coil 5 is coupled via a corresponding drive circuit 6 with an electrical energy source 7.
  • the drive circuit 6 can provide an alternating electrical voltage at a predetermined frequency to the primary coil 5.
  • an alternating magnetic field is generated.
  • This magnetic alternating field can couple into the secondary coil 2.
  • an electric current is induced in the secondary coil 2.
  • This electric current can be provided to the rectifier 3.
  • the rectifier 3 converts this electric current into a shape which is suitable for charging the electrical energy store 4.
  • this inductive power transmission system can be used for charging an electrical energy storage in an electric or hybrid vehicle.
  • a traction battery of the electric or hybrid vehicle can be charged without a galvanic connection between the vehicle and a charging station must be made.
  • any other applications for inductive energy transmission are possible.
  • the inductive energy transfer can be used to charge any electrical energy storage.
  • a shielding device 1 is provided on the secondary coil 2.
  • This shielding device 1 is arranged in particular on the side of the secondary coil 2, which faces away from the primary coil 5 during the inductive energy transmission.
  • the shielding device 1 for this purpose comprises a plurality of electrically conductive
  • the individual electrically conductive shielding elements 11 are in this case arranged electrically isolated from each other. That is, there is no electrically conductive connection between the individual electrically conductive shielding elements 11. In this case, the entirety of the electrically conductive shielding elements 11 of the shielding device 1 spans an area which corresponds at least to the area to be shielded behind the secondary coil 2.
  • the term "behind the secondary coil 2" is to be understood in particular the side of the secondary coil 2, which during the inductive
  • Shielding device 1 at least one area to be shielded, which corresponds to an extension d of the secondary coil 2.
  • extension is to be understood in particular as meaning the surface which is formed, for example, by a projection of the secondary coil 2 along an axis A onto the shielding device 1.
  • the axis A runs in this case in particular parallel to the magnetic field lines in the interior of the region of FIG Primary coil 5 and the secondary coil 2.
  • Figure 2 shows a schematic representation of a shielding device 1 for a receiving device of an inductive power transmission system according to one embodiment. As can be seen here, includes the
  • Shielding device 1 at least two electrically conductive shielding elements 11.
  • the shielding device 1 also more than two Shield elements 11 include.
  • These electrically conductive shielding elements 11 may be arranged, for example, on a carrier element 12.
  • This support member 12 may be formed of an electrically insulating material. In this way, the individual are electrically conductive
  • the electrically conductive shielding elements 11 can be arranged on a carrier substrate 12 made of a plastic or the like.
  • the electrically conductive shielding elements 11 can optionally be covered with a further electrically insulating substance 13.
  • the electrically conductive shielding elements 11 are embedded between the electrically insulating carrier layer 12 and the further electrically insulating protective layer 13.
  • the electrically conductive shielding elements 11 may be made of any electrically conductive substance, in particular an electrically conductive solid.
  • the electrically conductive shielding elements 11 may be formed from a metal, in particular copper or aluminum.
  • shielding elements made of an electrically conductive sheet metal or the like which are arranged on a carrier substrate 12 can be produced as electrically conductive shielding elements 11.
  • any other embodiments for the formation of electrically conductive shielding elements 11 on an electrically insulating Substratl2 possible.
  • the electrically conductive shielding elements 11 generally have an area which is smaller than the area which is to be shielded by the shielding device 1. In this case, an arbitrarily small size can be selected for the size of the individual electrically conductive shielding elements 11, as long as the individual electrically conductive shielding elements can still realize a magnetic shielding effect. For this it is only
  • the individual electrically conductive shielding elements 11 have a dimension in which still a magnetic shielding field can be generated. Appropriately, this can be achieved by induced eddy currents in the individual electrically conductive shielding elements 11.
  • the screen field generated by the eddy current then acts on the magnetic field of the Primary coil 5 and thus shields the area behind the secondary coil 2 from.
  • the individual screen elements 11 can each be arranged at a distance from one another.
  • the electrically conductive shielding elements 11 can be arranged either on that side of the carrier element 12 facing away from the secondary coil 2, or alternatively, the electrically conductive shielding elements 11 can be arranged on the side facing in the direction of the secondary coil 2. The greatest possible shielding effect is achieved if the distances between the individual shielding elements 11 are minimized.
  • FIG. 3 shows a schematic illustration of a shielding device 1 according to a further embodiment.
  • the electrically conductive shielding members 11 may also be formed on both sides of the
  • Carrier element 12 may be arranged.
  • the individual shielding elements 11 can be arranged offset on the two sides of the support member 12 against each other.
  • the gaps between the individual electrically conductive shielding elements 11 on one side of the carrier element 12 can be covered by the further shielding elements 11 on the other side of the carrier element 12.
  • the individual electrically conductive shielding elements 11 can be covered by means of a further electrically insulating substance (not shown here).
  • Figure 4 shows a schematic representation of a shielding device 1 according to yet another embodiment.
  • the electrically conductive screen elements 11 may be provided only on one side of the support member 12. Basically, however, is also in this
  • Embodiment a two-sided occupancy of the support member 12 with electrically conductive screen elements 11 possible.
  • the individual screen elements 11 are arranged overlapping. Even with this overlapping arrangement of the individual shielding elements 11, however, the individual electrically conductive shielding elements 11 are electrically insulated from one another arranged. For this purpose, for example, an electrically insulating substance must be provided in the overlapping region between the individual electrically conductive shielding elements 11.
  • FIG. 5 shows a schematic illustration of a shielding device 1 according to a further embodiment. This embodiment of the
  • Shielding device 1 differs in particular in that the individual electrically conductive screen elements 11 are not flat
  • Elements, such as metal sheets or the like are formed, but by individual electrically conductive particles.
  • the electrically conductive particles may be metal pieces, electrically conductive granules or the like. If appropriate, individual electrically conductive particles may also touch each other such that an electrical connection exists between individual electrically conductive particles.
  • an electrically conductive screen element 11 is formed by the entirety of the electrically connected particles. In order to form a plurality of electrically conductive shielding elements 11 within the shielding device 1, not all electrically conductive particles may be connected to one another.
  • Areas with the electrically conductive particles should also be chosen to be at least so large that an electrical eddy current can be induced therein. In this way, even with the electrically conductive particles described above, a magnetic shielding can be realized.
  • the electrically conductive particles may for example be embedded in an electrically insulating material.
  • this electrically insulating material may be a potting compound 14.
  • this potting compound a resin mixture, such as epoxy resin,
  • Thermosetting plastics or the like can also be embedded in any other substance, for example silicone or the like.
  • the shielding device 1 may for example be arranged directly on the secondary coil 2. Alternatively, it is also possible that the shielding device 1 is arranged at a predetermined distance from the secondary coil 2.
  • the secondary coil 2 and the electrically conductive shielding elements 11 of the shielding device 1 are embedded in a common, electrically conductive substance. In this way, a particularly compact structure for the shielding of the magnetic fields during the inductive energy transfer can be realized.
  • the present invention relates to a shielding of magnetic fields during inductive energy transfer.
  • it is provided to realize the shielding of the magnetic fields by means of a plurality of electrically conductive screen elements.
  • the individual electrically conductive screen elements are electrically isolated from each other. In this way, a capacitive coupling and thus an electrical charging of the shield during the inductive energy transmission can be minimized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne une protection contre des champs magnétiques pendant une transmission d'énergie par induction. À cet effet, une bobine secondaire (2) peut être accouplée par induction à une bobine primaire (5) du système de transmission d'énergie par induction, et dispose d'un système de protection (1) pourvu d'au moins deux éléments de protection électro-conducteurs (11), les éléments de protection électro-conducteurs (11) étant isolés électriquement l'un de l'autre.
PCT/EP2017/075128 2016-11-16 2017-10-04 Dispositif pour un système de transmission d'énergie par induction, système de transmission d'énergie par induction et dispositif de charge pour un accumulateur d'énergie électrique WO2018091191A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016222529.4 2016-11-16
DE102016222529.4A DE102016222529A1 (de) 2016-11-16 2016-11-16 Vorrichtung für ein induktives Energieübertragungssystem, induktives Energieübertragungssystem und Ladevorrichtung für einen elektrischen Energiespeicher

Publications (1)

Publication Number Publication Date
WO2018091191A1 true WO2018091191A1 (fr) 2018-05-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/075128 WO2018091191A1 (fr) 2016-11-16 2017-10-04 Dispositif pour un système de transmission d'énergie par induction, système de transmission d'énergie par induction et dispositif de charge pour un accumulateur d'énergie électrique

Country Status (2)

Country Link
DE (1) DE102016222529A1 (fr)
WO (1) WO2018091191A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018004679B4 (de) * 2018-06-12 2023-06-01 Mercedes-Benz Group AG Elektromagnetische Strahlung abschirmender Unterboden für eine Karosserie eines Fahrzeugs, Fahrzeug mit einem solchen Unterboden, und Verwendung eines solchen Unterbodens

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011010049A1 (de) 2011-02-01 2011-11-03 Daimler Ag Ladevorrichtung und Verfahren zum Laden einer Batterie eines Fahrzeugs
US20120218068A1 (en) * 2011-02-28 2012-08-30 Equos Research Co., Ltd. Antenna
DE202012105016U1 (de) * 2012-12-21 2013-01-30 Robert Bosch Gmbh Handwerkzeugspulenvorrichtung
DE102013101152A1 (de) * 2013-02-05 2014-08-21 Conductix-Wampfler Gmbh Spuleneinheit und Vorrichtung zur induktiven Übertragung elektrischer Energie
WO2016052879A1 (fr) * 2014-09-29 2016-04-07 엘지이노텍 주식회사 Appareil de transmission d'énergie sans fil et appareil de réception d'énergie sans fil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011010049A1 (de) 2011-02-01 2011-11-03 Daimler Ag Ladevorrichtung und Verfahren zum Laden einer Batterie eines Fahrzeugs
US20120218068A1 (en) * 2011-02-28 2012-08-30 Equos Research Co., Ltd. Antenna
DE202012105016U1 (de) * 2012-12-21 2013-01-30 Robert Bosch Gmbh Handwerkzeugspulenvorrichtung
DE102013101152A1 (de) * 2013-02-05 2014-08-21 Conductix-Wampfler Gmbh Spuleneinheit und Vorrichtung zur induktiven Übertragung elektrischer Energie
WO2016052879A1 (fr) * 2014-09-29 2016-04-07 엘지이노텍 주식회사 Appareil de transmission d'énergie sans fil et appareil de réception d'énergie sans fil
US20170222472A1 (en) * 2014-09-29 2017-08-03 Lg Innotek Co., Ltd. Wireless power transmitting apparatus and wireless power receiving apparatus

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Publication number Publication date
DE102016222529A1 (de) 2018-05-17

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