DE102014000738A1 - Shielding device for shielding electromagnetic radiation in a contactless energy transmission, energy transmission device and arrangement for contactless energy transmission - Google Patents

Shielding device for shielding electromagnetic radiation in a contactless energy transmission, energy transmission device and arrangement for contactless energy transmission

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Publication number
DE102014000738A1
DE102014000738A1 DE102014000738.3A DE102014000738A DE102014000738A1 DE 102014000738 A1 DE102014000738 A1 DE 102014000738A1 DE 102014000738 A DE102014000738 A DE 102014000738A DE 102014000738 A1 DE102014000738 A1 DE 102014000738A1
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Germany
Prior art keywords
shielding device
shielding
vehicle
ground
characterized
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.)
Pending
Application number
DE102014000738.3A
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German (de)
Inventor
Björn Elias
Marco Augustin
Regina Semmler
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Audi AG
Original Assignee
Audi AG
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Filing date
Publication date
Application filed by Audi AG filed Critical Audi AG
Priority to DE102014000738.3A priority Critical patent/DE102014000738A1/en
Publication of DE102014000738A1 publication Critical patent/DE102014000738A1/en
Application status is Pending legal-status Critical

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/34Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36Electric or magnetic shields or screens
    • H01F27/365Magnetic shields or screens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10Methods 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
    • B60L53/12Inductive energy transfer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30Constructional details of charging stations
    • B60L53/35Means for automatically adjusting the relative position of charging devices and vehicles
    • B60L53/36Means for automatically adjusting the relative position of charging devices and vehicles by positioning the vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30Constructional details of charging stations
    • B60L53/35Means for automatically adjusting the relative position of charging devices and vehicles
    • B60L53/38Means for automatically adjusting the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2270/00Problem solutions or means not otherwise provided for
    • B60L2270/10Emission reduction
    • B60L2270/14Emission reduction of noise
    • B60L2270/147Emission reduction of noise electro magnetic [EMI]
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14Inductive couplings
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7005Batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/12Electric charging stations
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/12Electric charging stations
    • Y02T90/121Electric charging stations by conductive energy transmission
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/12Electric charging stations
    • Y02T90/122Electric charging stations by inductive energy transmission
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/12Electric charging stations
    • Y02T90/125Alignment between the vehicle and the charging station
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/14Plug-in electric vehicles

Abstract

Shielding device for shielding electromagnetic radiation, which results from contactless energy transfer from a primary coil (4) arranged stationarily in or on a region of a base (3) to a secondary coil (22) arranged on a vehicle (21), wherein the shielding device (2 , 11, 16, 23) is designed as a frame and in such a manner on a base (3), in or on a region of which a primary coil (4) is stationarily arranged, fastened or fastened, that it comprises the region in the form of a frame.

Description

  • The invention relates to a shielding device for shielding electromagnetic radiation, which arises in a contactless energy transfer from a stationary arranged in or at a portion of a floor primary coil to a arranged on a vehicle secondary coil.
  • Electromobility is becoming increasingly important, especially for motor vehicles. An important challenge in the context of electromobility is to provide a sufficient number of charging options for electrically powered vehicles. Users are particularly comfortable with energy transmission devices that enable contactless energy transfer. In this case, no cables or the like need be connected to the vehicle, but it is sufficient to park the vehicle in an area in which adjacent to the vehicle, especially in the ground on which the motor vehicle is located, so for example in a street, a Parking lot or the like, a primary coil is arranged, wherein in a corresponding region of the motor vehicle, a typically in the energy transmission of the primary coil opposite secondary coil is provided. When operating the primary coil with an AC voltage alternating electromagnetic fields are generated, which generate a voltage at the secondary coil in the motor vehicle and thus in particular a charging current for a battery.
  • In order to enable a fast charging of vehicle batteries, it is advantageous to use strong alternating fields in such a contactless energy transfer. However, it is disadvantageous that an introduction of conductive objects, even of low-conductive objects such as body parts, in these strong alternating fields causes that these objects are strongly heated. In addition, in particular high-frequency fields with a large amplitude can disturb other electronic components. Therefore, it is often necessary in the contactless energy transfer to limit the field strength of the alternating fields in such a way that the possibility of injuries to body parts, damage to objects introduced into the field or the disturbance of further electronics is prevented. At the same time, however, such limitation of the maximum field strength results in lower voltages being induced in the secondary coil, with the result that lower currents are also available for charging a battery or for operating further components. However, long charging times, which are necessary due to the use of low charging currents, can lead to acceptance problems for electric vehicles.
  • It is known for transformers that also transmit contactless energy between two coils to provide a housing for electromagnetic shielding, in which the primary and the secondary coil are arranged. However, a use of this arrangement is very expensive to transfer energy from a stationary primary coil to a secondary coil arranged in a vehicle, since at least before and after an energy transfer, a movement of the vehicle relative to the stationary primary coil must be possible. A corresponding housing would therefore have to be built up before an energy transfer and then dismantled again.
  • The invention is therefore based on the object to provide a contrast improved shielding.
  • The object is achieved by a shielding of the type mentioned above, which is characterized in that it is designed as a frame and so on a floor, in or on a portion of which a stationary primary coil is arranged, fastened or secured that they Area comprises frame-shaped.
  • The invention is based on the idea of designing the shielding device in such a way that it is part of an energy transmission device or can be fastened to such a device. In this case, the shielding device according to the invention is intended for use with an energy transmission device which uses a primary coil arranged in an area of a floor for energy transmission. The primary coil can thus be arranged in or on each vehicle passable surface, for example in or on streets, parking lots or rails. Such energy transmission devices are particularly advantageous for the loading of motor vehicles, since they may be provided for example in parking lots, whereby a loading of motor vehicles is simply possible by parking the motor vehicle in the parking lot. However, such energy transfer can also be used for rail vehicles. Thus, electrically operated trains can be loaded in a parking area. However, it is also possible to provide the trains while driving through such a power transmission device with energy.
  • As mentioned in the introduction, it is advantageous in the transmission of large amounts of energy to prevent foreign objects from entering the area between the primary and secondary coils. In addition, it is advantageous if stray fields of the primary coil are shielded. Therefore, a shielding device according to the invention is proposed, which is designed as a three-dimensional frame, wherein the frame a Inner surface limited and has a height. As height is referred to in the invention, the extension of the frame in the direction perpendicular to the ground. The frame can be formed in particular by a circumferential or several walls. Advantageously, the wall or the walls are perpendicular to the ground, but it is also possible to arrange one or more walls at an angle, so that the wall with an angle to the bottom forms an angle <90 °. The area of the frame bounded by the frame or the shape of the frame may in particular be rectangular, but it is also possible to provide frames with a circular surface or other frame shapes. In this case, the surface is to be chosen in particular such that the primary coil in the state of the shielding device fastened to the bottom is completely enclosed by the frame in the horizontal direction. The height can be several centimeters, in particular at least 5 cm. The height can be chosen to be slightly less than the ground clearance of a conventional vehicle to which energy is to be transferred. However, it is also possible to make the height customizable by the shielding of several parts, for example, vertically mutually displaceable subframe is formed. The shielding device can also be displaceable in the vertical direction relative to the ground in order to adjust the height of the ground clearance of a vehicle. It is possible to provide different shielding devices for different types of vehicles. For example, a shielding device for transmitting energy to a sports car may have a height of between 5 and 10 cm, and a shielding device for transmitting energy to an SUV may have a height of between 15 and 20 cm.
  • The shielding device may additionally have a bottom plate. This can serve as a cover for the primary coil or to stabilize the shielding. However, it is advantageous if the bottom plate is designed to shield electromagnetic radiation in a frequency range which is used for energy transmission, only very little or not at all.
  • By using the shielding device according to the invention two major advantages can be achieved. On the one hand, the possibility of intrusion of foreign objects into the region between the primary and secondary coils can be reduced, since at least parts of the volume between the primary and secondary coils are limited or blocked off laterally by the shielding device, and on the other hand stray fields of the primary coil are shielded by the shielding device , In this case, during the energy transmission to a vehicle by the vehicle, the floor and the shielding device, the volume between the primary and secondary coil can be completely completed. Alternatively, it is possible for a particularly narrow gap to remain between the shielding device and the vehicle.
  • Therefore, depending on the ground clearance of the vehicle and the height above the ground reaching the shielding means in the ground-mounted state, it is possible that the underbody of the vehicle or other parts of the vehicle, such as bumpers, come into contact with the shielding means. In this case, damage to the vehicle should be avoided. Therefore, it is advantageous if the shielding device is at least partially formed of an elastically bendable material. As elastically bendable materials can be used for example silicone, rubber, elastomers, thermoplastics or the like. The materials used should be flexible and have a resilience, so that they return to their original shape after deformation and contact with the vehicle or other object. In this case, the shielding device may be formed entirely from the elastically bendable material, so that, for example, a trouble-free driving over of the shielding device without damaging the vehicle and the shielding device is possible. However, it is also possible to form only a portion or a plurality of sections of the shielding means of an elastically bendable material, in particular in the ground-mounted state, floor-facing portions which potentially come into contact with a vehicle during normal use of the shielding means.
  • The shielding device may comprise at least one metallic plate and / or at least one metallic foil and / or metallic particles and / or at least one metallic tissue. By using conductive, in particular flat, structures in the shielding device, a particularly efficient shielding of electromagnetic radiation is achieved. The metallic materials can also be magnetic, but also non-magnetic conductive materials such as aluminum or copper can be used. As mentioned above, it is advantageous, in particular when the energy transmission is used for charging vehicle batteries, to use relatively strong electromagnetic fields for energy transmission. For shielding strong fields, it is advantageous to use planar metallic or otherwise conductive structures. In particular, sheet-like plates, films or, in particular, narrow-meshed, fabrics can be used. The plates, films and fabrics can also be broken through, but the surface portion of the conductive material should be greater than that of the non-conductive material or the interstices or openings.
  • In addition to the shielding effect, in particular metallic plates and / or metallic fabrics additionally have a mechanical stabilizing effect. As a result, the use of such metallic materials also leads to a high stability and durability of the shielding device.
  • The shielding device may be at least partially formed of a composite material, in particular a laminate, wherein the metallic plate and / or the metallic foil and / or the metallic particles and / or the metallic tissue are accommodated in a matrix of elastically bendable material.
  • The shielding device can also comprise as a resiliently bendable material and / or as a stabilizing material a textile fabric, which is encased in a metallic plate or a metallic foil and / or a metallic fabric and / or an elastically bendable material or introduced into an elastically bendable material for stabilization.
  • In particular, the metallic plate and / or the metallic foil and / or the metallic particles and / or the metallic tissue may be at least partially enveloped by the or an elastically bendable material. Thus, the said metallic constituents of the shielding device can be enveloped in particular in such a way that they are protected against liquids or air, in order to prevent oxidation or corrosion of the metallic materials. Alternatively or additionally, a core made of an elastically bendable material of metallic fabric or metallic foil can be sheathed.
  • The shielding device may in particular comprise at least one metallic plate, the shielding device having a bottom-mounted state of the shielding device and a floor-facing portion of the frame, wherein the metallic plate is arranged to extend vertically in the floor-facing portion and the floor-facing portion formed of elastically bendable material is. By using at least one metallic plate in the floor-facing section, a particularly high stability of the shielding device and a particularly good absorption of electromagnetic radiation by the shielding device can be achieved. At the same time, the use of elastically bendable material in the portion facing away from the floor, and thus a vehicle to which energy is to be transmitted, effectively prevents damage to the vehicle since it can only come into contact with the elastically bendable material.
  • When mounting the shielding device according to the invention on the ground, a trough-like structure can be formed overall. On the one hand, while this structure is well suited for shielding electromagnetic fields during energy transfer, it is possible for water or other liquids to collect in this structure when used outdoors. It is therefore advantageous if openings are provided on the shielding device in order to allow accumulated or accumulating water to escape within the frame. A particularly good drainage of the water is possible if the openings are located in at least one in the ground-mounted state adjacent to the ground area of the shielding. If there is a displacement of the shielding device with respect to the bottom in the vertical direction, it is advantageous to provide openings in different areas on the shielding device in order to always allow a drainage of water independent of the vertical position of the shielding device. The openings may have dimensions of a few centimeters, in particular 1 to 2 cm. However, it is also possible to provide openings with smaller diameters, for example of 0.5 mm, or larger diameters. It may be particularly easy to provide circular openings, but a variety of other shapes are possible. For example, rectangular, oval, semicircular or semi-oval openings may be provided. It is particularly advantageous if the openings are arranged directly on the bottom edge of the shielding.
  • In order to achieve an adaptability of the height of the shielding device, it is advantageous if the shielding device comprises at least a first frame-shaped and a second frame-shaped subframe, wherein fixed in the ground state of the shielding the first subframe is fixed to the ground and the second subframe is guided in that it is telescopically displaceable perpendicular to the floor opposite the first subframe for adjusting the height. In this case, the second subframe is mounted directly or indirectly in particular on the first subframe. It is additionally possible to provide an actuator for displacing the second subframe with respect to the first subframe to the shielding device. However, it is also possible to determine the relative position of the first and the second sub-frame by mechanical restoring elements such as springs or the like. If an actuator is provided for the relative displacement, the control of the actuator can be effected in particular by a control device which comprises or communicates with a communication device. The communication device can with a component of a Vehicle to which energy is to be transmitted communicate. It is thus possible, for example, to provide a read-out device on the shielding device for reading out an RFID chip arranged on a vehicle. The advantage of this is that RFID chips can be formed purely passive, so that a passive component can be provided on a body or a chassis of a vehicle, which can be read by the shielding to set a height of the shielding device predetermined by the vehicle.
  • Of course, it would also be possible to provide sensors such as force sensors, cameras or the like on the shielding device in order to control a height adjustment of the shielding device.
  • In addition, the invention relates to a power transmission device for contactless energy transmission to a vehicle, comprising a primary coil for contactless transmission of energy via a gap to a vehicle-side secondary coil, wherein the primary coil is disposed in or on a portion of the bottom, wherein at the bottom of a shielding according to the invention relative fixed to the ground or slidably mounted in at least one direction, which surrounds the area frame-shaped.
  • The inventive use of a shielding device according to the invention as part of the energy transmission device on the one hand provides protection against the introduction of objects, body parts or small animals in the area between the primary and the secondary coil during the charging process. As a result, the safety during operation of the energy transmission device is increased. In addition, the propagation of the electromagnetic radiation for energy transmission is substantially restricted to the area within the frame. Outside the frame, the electromagnetic radiation is strongly shielded. As a result, the energy transmission device according to the invention can use much stronger alternating electromagnetic fields for energy transmission. In particular, can be achieved so that batteries of an electrically powered vehicle, in particular a motor vehicle, can be charged faster.
  • By a displaceable arrangement of the shielding device on the ground, in particular, it is achieved that the height of the shielding device can be adapted via the ground in order to allow an adaptation of the energy transmission device to vehicles with different ground clearances. However, it is also possible to arrange the shielding device so that it can be displaced horizontally over the ground so that the shielding device can be introduced laterally, for example, under a vehicle arranged above the energy transmission device. This can be advantageous since some vehicles have less ground clearance in the rear or front area than in the lateral area or the area of the secondary coil. Moreover, such a horizontal retraction of the shielding device also makes it possible to provide different shielding devices and, depending on the type and / or ground clearance and / or size of the secondary coil of the vehicle, to select different shielding devices and to guide them horizontally under the vehicle.
  • The primary coil of the energy transmission device can be embedded in the ground, wherein a direct admission of the primary coil is possible in the ground, but the primary coil can also be arranged in a housing. In addition, it is possible that the primary coil is arranged in a separate housing or exposed on the floor.
  • The shielding device can form a trough-shaped arrangement together with the bottom, which limits an inner volume open on one side on the side facing away from the bottom. The trough-shaped arrangement can be substantially closed except for the open side, although openings for water drainage can be provided.
  • The shielding device or a component of the shielding device can be displaceable perpendicular to the ground. It is possible that the shielding device, for example, in the ground on and out of the ground is extendable. However, it is also possible for only parts of the shielding device, for example the subframes described above, to be displaced relative to one another. In this case, a vertical displacement also describes those displacements which are only substantially perpendicular, d. H. in which a shift takes place with a small angle to the vertical to the ground, in particular less than 30 °.
  • The energy transmission device may comprise at least one actuator for displacing the shielding device or the displaceable component of the shielding device in the direction perpendicular to the ground.
  • In particular, it is possible that the energy transmission device comprises a communication device for wireless communication with a vehicle and a control device, wherein the control device is designed to control the actuator in response to a communication information received by the communication device. Communication with the vehicle can take place, as already described with respect to a relative displacement of subframe of the shielding.
  • Alternatively or additionally, it is possible that the relative position of the shielding device or of the displaceable components in the direction perpendicular to the ground is determined by at least one mechanical return element. The mechanical return element may in particular be a spring, but it is also possible to move against a counterweight or the like. The position fixing by a return element can also be combined with a vertical displacement by an actuator. For example, the basic definition of the height of the shielding device above the ground can be determined by an actuator. By arranging a return element between the actuator and the displaceable component or the shielding device, however, the shielding device yields in the vertical direction, whereby damage to the energy transmission device or the vehicle can be prevented.
  • In addition, the invention relates to an arrangement for contactless energy transmission, comprising a vehicle with a secondary coil for contactless energy transmission, wherein the vehicle is arranged over one of the described embodiments of a power transmission device, that the secondary coil is disposed above the primary coil of the energy transmission device. In order for a contactless energy transfer from the primary coil to the secondary coil is possible, wherein the area between the primary coil and the secondary coil is at least partially surrounded by the shielding device according to the invention, whereby on the one hand penetration of objects or body parts in the region between the primary coil and secondary coil can be prevented and on the other hand, the electromagnetic alternating fields of the primary coil are essentially restricted to the area within the shielding device.
  • In this case, the shielding device may extend from the ground to an underbody or a component of the vehicle carrying the secondary coil. However, it is also possible that a narrow gap of a few centimeters, for example 1 to 2 cm, is provided between the upper edge of the shielding device and the subfloor or the component carrying the secondary coil.
  • Overall, it can be achieved that the shielding device and the vehicle, in particular the underbody of the vehicle, together with the bottom limit a volume closed on all sides. In this case, the volume can in particular only be essentially completed, wherein, as described above, openings for the drainage of accumulated water can be provided on the one hand and on the other hand a narrow gap can be provided between the upper edge of the shielding device and the vehicle.
  • Overall, in the arrangement according to the invention, a good penetration protection against the penetration of objects, animals and body parts into the field-flooded area is achieved and the field-flooded area is essentially limited to the area within the shielding device.
  • Further advantages and details will become apparent from the following embodiments and the accompanying drawings. Showing:
  • 1 3 is a schematic diagram of an exemplary embodiment of an energy transmission device according to the invention, which comprises a shielding device according to the invention,
  • 2 a sectional schematic diagram of the shielding 1 along the section line AA,
  • 3 a sectional schematic diagram of the shielding 1 along the line BB,
  • 4 a detailed view of a schematic diagram of another embodiment of an energy transfer device according to the invention comprising a shielding device according to the invention,
  • 5 a schematic representation of another embodiment of a shielding device according to the invention from above, and
  • 6 a schematic diagram of an inventive arrangement for contactless energy transfer.
  • 1 shows a schematic diagram of an embodiment of an energy transfer device 1 for contactless energy transmission to a vehicle. The energy transfer device 1 includes a shielding device 2 standing at a ground 3 is fixed, such that it is frame-shaped an area above the ground 3 surrounds in which a primary coil 4 is arranged. The shielding device 2 is a rectangular frame with four side walls and open surfaces at the top and bottom. It has a floor-facing section 5 and a floor-facing section 9 of the frame. In the floor-facing section 5 are the four side walls of the shielding device 2 from metallic plates 6 Made of aluminum, made of an elastically bendable material 8th that is silicone, are surrounded.
  • To the plates 6 is an area 7 molded, with which the plates on the ground 3 are attached. The attachment is made by the area 7 in the ground 3 which is a concrete floor, is poured. Alternatively, it would be possible to have a detachable connection of the shielding device 2 with the ground 3 provided. This would be possible, for example, by attaching to the plates 6 Ground spikes are formed and the ground 3 consists of earth. However, it would also be possible on the shielding device 2 Fasteners, for example, terminals to provide and provide at the bottom fastening means, which are designed for connection to the shielding device side provided fastening means. A corresponding detachable connection can be formed non-positively and / or positively.
  • In particular, it is possible that an attachment to the ground takes place in such a way that a horizontal displacement of the shielding device is prevented, ie that a vertical insertion or withdrawal of the shielding device 2 in or out of shots in the ground 3 is possible at any time.
  • In the shielding device 2 is called elastically bendable material 9 Silicone used. In the floor-facing section 9 is the shielding device 2 exclusively of the elastically bendable material 8th ie made of silicone. This ensures that when a contact of a vehicle with the shielding 2 For example, the underbody of the vehicle or a bumper, this contact usually exclusively with the floor facing away portion 9 ie with the elastically bendable material 8th he follows. This will prevent the vehicle from passing through the shielding device 2 is damaged. Since the elastically bendable material 8th has a recovery, the shielding device returns 2 As soon as there is no contact with the vehicle or any other object, return to its original shape.
  • Through the shielding 2 and the floor 3 becomes together a tub-shaped interior 10 educated. It is advantageous by the use of the shielding device 2 achieves that when using the energy transfer device 1 for the transmission of energy to a vehicle on the one hand, an introduction of objects, body parts or the like in the interior 10 is prevented, on the other hand, the electromagnetic alternating fields, which are used for energy transmission, essentially to the interior 10 are limited.
  • To illustrate the frame-shaped structure of the shielding 2 shows 2 a section through the shielding 2 along the line AA, ie in the floor-facing section 5 , and 3 a section through the shielding 2 along the line BB, ie in the floor-facing section 9 , It is 2 to see that the metallic plate 6 in the floor-facing section 5 on both sides of the elastically bendable material 8th , ie surrounded by silicone. In the cut representation in 2 is also particularly good to recognize that by the shielding device 2 The interior 10 is completely surrounded by a frame. 3 shows the corresponding section through the shielding 2 in the floor-facing section 9 in which the shielding device 2 completely made of the elastically bendable material 8th is formed.
  • 4 shows a detailed view of another embodiment of a power transmission device 1 for contactless energy transfer. This corresponds to the soil 3 as well as the primary coil 4 completely with respect to 1 described elements. The shielding device 11 from the in 3 only the floor-facing portion is shown is similar to that in FIG 1 Shielding device shown 2 built up. The walls of the shielding device 11 are also made of aluminum plates 12 formed and have attachment sections 13 on that in the ground 3 are anchored. The metallic plates 12 are also here with an elastically bendable material 14 surround. Substantial difference to in 1 Shielding device shown 2 is that the shielding device 11 in an area adjacent to the ground openings 15 to allow accumulated or accumulating water to escape. These openings 15 break through both the metallic plate 12 as well as the elastically bendable material 14 , It is in the area 30 , the boundary of the opening 15 , one the edge of the opening 15 forming layer of the elastically flexible material provided, which is the metallic plate 12 from the opening 15 separates. This is the metallic plate 12 completely of the elastically bendable material 14 enclosed, so that contact with air or water is prevented, which also causes oxidation of the metallic plate 12 is prevented.
  • 5 shows a further embodiment of a shielding device 16 for shielding electromagnetic radiation in a contactless energy transfer. The shielding device 16 is from two subframes 17 . 18 formed, with the inner first sub-frame 18 is attachable or fixed to a floor and is substantially constructed, as the floor-facing portion 5 the in 1 Shielding device shown 2 , but in addition a guide element 19 has the dovetail-shaped in the outer second sub-frame 17 intervenes. The second subframe 17 is formed of elastically bendable material and, by the guide element 19 guided, opposite the first part of the frame attachable to the ground 18 slidable in the direction perpendicular to the ground. By this displacement, the shielding 16 to the ground clearance of a vehicle to which energy is to be transmitted. In the simplest case, the second subframe is 17 only by frictional force on the first subframe 18 supported. In this case, by manually adjusting the shielding 16 before use, the shielding device according to the vehicle to which energy is to be transmitted, are set.
  • Alternatively, it would be possible between the first subframe 18 and the second subframe 17 a mechanical return element or an actuator for relative displacement of the subframe 17 . 18 to arrange. When using an actuator, the control of the actuator can take place, as described below with reference to 6 for an actor 26 for vertical displacement of the entire shielding device 23 described.
  • 6 shows an arrangement for contactless energy transfer. The arrangement for contactless energy transmission comprises an energy transmission device 20 as well as a vehicle 21 , where the vehicle 21 such over the energy transfer device 20 arranged is that the secondary coil 22 of the vehicle 21 above the primary coil 4 the energy transmission device 20 located. Will now be the primary coil 4 energized with alternating current, so arise in the area above the primary coil 4 Electromagnetic alternating fields in the secondary coil 22 Induce voltages. This sets the secondary coil 22 Currents ready with which, for example, a battery 31 of the vehicle 21 can be loaded. The energy transfer device 20 includes a shielding device 23 that the primary coil 4 frame-shaped surrounds.
  • The shielding device 23 is through the actor 26 displaceable in vertical direction. In 5 is the shielding device 23 shown in a retracted position where they barely get out of the ground 3 protrudes. Is the shielding device 23 retracted, this corresponds approximately to a use of a power transmission device that has no additional shielding. In order to achieve the best possible protection against the introduction of objects, body parts and the like and the best possible electromagnetic shielding, the shielding 23 be extended so far that they are in contact with the subfloor 25 of the vehicle 21 is or that between the subsoil 25 and the shielding device 23 only a narrow gap of about 1 to 2 cm is available. This corresponds to the in 5 dashed state shown 24 , As the energy transfer device 20 However, to be used for different vehicles with different ground clearance, is the state 24 in which optimum shielding of the area between the primary coil 4 and the secondary coil 22 is achieved, different for different vehicles.
  • In the arrangement shown is therefore in the vehicle 21 an RFID chip provided. RFID chips are purely passive circuits that are powered by energy provided by radio waves. The energy transfer device 20 includes a communication device 28 , which is designed as an RFID reader and by the control device 27 the energy transmission device 20 is controlled. The communication device recognizes this 28 the approach of the vehicle 21 and wirelessly reads the RFID chip 29 of the vehicle 21 out. The RFID chip 29 transmits information about the ground clearance of the vehicle 21 , Depending on which through the communication device 28 received ground clearance of the vehicle 21 becomes the shielding device 23 extended to the extent that they are in optimal condition 24 for shielding electromagnetic radiation and preventing intrusion of third-party objects during power transmission to the vehicle 21 is.

Claims (16)

  1. Shielding device for the shielding of electromagnetic radiation, which in a contactless energy transfer from a stationary in or at a portion of a floor ( 3 ) arranged primary coil ( 4 ) to a vehicle ( 21 ) arranged secondary coil ( 22 ), characterized in that the shielding device ( 2 . 11 . 16 . 23 ) is designed as a frame and so on a floor ( 3 ), in or at a portion thereof stationary a primary coil ( 4 ), fastened or fixed, that it comprises the area frame-shaped.
  2. Shielding device according to claim 1, characterized in that it at least partially made of an elastically bendable material ( 8th . 14 ) is formed.
  3. Shielding device according to claim 1 or 2, characterized in that it comprises at least one metallic plate ( 6 . 12 ) and / or at least one metallic foil and / or metallic particles and / or at least one metallic tissue.
  4. Shielding device according to claim 3, characterized in that the metallic plate ( 6 . 12 ) and / or the metallic foil and / or the metallic particles and / or the metallic tissue at least partially of the or an elastically bendable material ( 8th . 14 ) is wrapped or are.
  5. Shielding device according to claim 3 or 4, characterized in that it comprises at least one metallic plate ( 6 . 12 ), wherein the shielding device ( 2 . 11 . 16 . 23 ) a floor-mounted state floor-facing and a floor-facing portion 5 . 9 ) of the frame, wherein the metallic plate ( 6 . 12 ) in the floor-facing section ( 5 ) is arranged vertically extending and the floor-facing portion ( 9 ) made of elastically bendable material ( 8th . 14 ) is formed.
  6. Shielding device according to one of the preceding claims, characterized in that at least one opening ( 15 ) is provided to allow accumulated or accumulating water within the frame.
  7. Shielding device according to one of the preceding claims, characterized in that the shielding device ( 2 . 11 . 16 . 23 ) at least a first frame-shaped and a second frame-shaped subframe ( 17 . 18 ), wherein in the ground-mounted state of the shielding device ( 2 . 11 . 16 . 23 ) the first of the subframes ( 18 ) is attached to the ground and the second subframe ( 17 ) is guided such that it is perpendicular to the ground opposite the first subframe ( 18 ) is telescopically displaceable to adjust the height.
  8. Energy transfer device for contactless energy transfer to a vehicle, comprising a primary coil ( 4 ) for non-contact transmission of energy via a gap to a vehicle-side secondary coil ( 22 ), wherein the primary coil ( 4 ) in or on an area of a floor ( 3 ), characterized in that at the bottom ( 3 ) a shielding device ( 2 . 11 . 16 . 23 ) according to one of the preceding claims relative to the ground ( 3 ) fixed or slidably mounted in at least one direction, which surrounds the area frame-shaped.
  9. Energy transmission device according to claim 8, characterized in that the shielding device ( 2 . 11 . 16 . 23 ) together with the ground ( 3 ) forms a trough-shaped arrangement which one-sided on the ground ( 3 ) facing away from open inner volume ( 10 ) limited.
  10. Energy transmission device according to claim 8 or 9, characterized in that the shielding device ( 2 . 11 . 16 . 23 ) or at least one component of the shielding device ( 2 . 11 . 16 . 23 ) is displaceable perpendicular to the ground.
  11. Energy transmission device according to claim 10, characterized in that it comprises at least one actuator ( 26 ) for shifting the shielding device ( 2 . 11 . 16 . 23 ) or the displaceable component of the shielding device ( 2 . 11 . 16 . 23 ) in the direction perpendicular to the ground ( 3 ).
  12. Energy transmission device according to claim 11, characterized in that it comprises a communication device ( 28 ) for wireless communication with a vehicle ( 21 ) and a control device ( 27 ), wherein the control device ( 27 ) is formed, depending on a by the communication device ( 28 ) communication information the actuator ( 26 ) head for.
  13. Energy transmission device according to one of claims 10 to 12, characterized in that the relative position of the shielding device ( 2 . 11 . 16 . 23 ) or the displaceable component in the direction perpendicular to the ground ( 3 ) is determined by at least one mechanical return element.
  14. Arrangement for contactless energy transmission, comprising a vehicle ( 21 ) with a secondary coil ( 22 ) for contactless energy transmission, characterized in that the vehicle ( 21 ) above the energy transmission device ( 1 . 20 ) according to one of claims 8 to 13, that the secondary coil ( 22 ) above the primary coil ( 4 ) of the energy transmission device ( 1 . 20 ) is arranged.
  15. Arrangement according to claim 14, characterized in that the shielding device ( 2 . 11 . 16 . 23 ) from the ground ( 3 ) to a subfloor ( 25 ) or one the secondary coil ( 22 ) supporting component of the vehicle ( 21 ).
  16. Arrangement according to claim 14 or 15, characterized in that the shielding device ( 2 . 11 . 16 . 23 ) and the vehicle ( 21 ), especially the subsoil ( 25 ) of the vehicle ( 21 ), together with the ground ( 3 ) limit a volume completed on all sides.
DE102014000738.3A 2014-01-21 2014-01-21 Shielding device for shielding electromagnetic radiation in a contactless energy transmission, energy transmission device and arrangement for contactless energy transmission Pending DE102014000738A1 (en)

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DE102014000738.3A DE102014000738A1 (en) 2014-01-21 2014-01-21 Shielding device for shielding electromagnetic radiation in a contactless energy transmission, energy transmission device and arrangement for contactless energy transmission
PCT/EP2015/000054 WO2015110252A1 (en) 2014-01-21 2015-01-14 Shielding device for shielding off electromagnetic radiation during wireless power transfer, power transferring device, and arrangement for wireless power transfer

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