EP3245660A1 - Use and assembly of pancake coils for wireless energy transmission to electric vehicles - Google Patents

Use and assembly of pancake coils for wireless energy transmission to electric vehicles

Info

Publication number
EP3245660A1
EP3245660A1 EP16707004.4A EP16707004A EP3245660A1 EP 3245660 A1 EP3245660 A1 EP 3245660A1 EP 16707004 A EP16707004 A EP 16707004A EP 3245660 A1 EP3245660 A1 EP 3245660A1
Authority
EP
European Patent Office
Prior art keywords
coil
pancake
coils
electric vehicles
layers
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Withdrawn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
EP16707004.4A
Other languages
German (de)
French (fr)
Inventor
Franz Eiermann
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP3245660A1 publication Critical patent/EP3245660A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2871—Pancake coils
    • 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
    • H01F27/006—Details of transformers or inductances, in general with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance
    • 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
    • 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
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
    • 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 invention relates to the use of so-called
  • Road-going electric vehicles are connected to a charging station in the current state of the art by means of a connection made from a plug to a mating coupling.
  • stations with appropriate cables are provided.
  • the object of the present invention is to provide such a Lö ⁇ solution, particularly advantageously solves these requirements. This object is solved by the features of claim 1 and the features of claim 6.
  • a pancake coil is used for the wireless transmission of energy to an electric vehicle, wherein at least a first coil of the coils required for transmission is designed as a pancake coil for wireless transmission.
  • pancake coils are compact and at the same time flat keptstal- tet, wherein the individual coils a high quality aufwei ⁇ sen, increases the efficiency of energy transfer.
  • pancake coils which is characterized in that it is 2-layer spiral coils of stranded wire same sense of winding, with a first coil, in a ers ⁇ th location from outside to inside wound and a second coil is wound in a second layer from the inside out.
  • the use is putge ⁇ forms such that, for the use of the pancake coil, layers of the first coil are arranged separated in a voltage-resistant manner.
  • This distinctive ⁇ net in particular by stable storage of the coils but also by optimizing the energy transfer function.
  • Derivatives here are defined as composites designed for use as circuit board material.
  • this may be realized such that the tension resistive separate arrangement of the first coil, a Teflon film is mounted between the layers.
  • a Teflon film is mounted between the layers.
  • the pancake coil of the invention is arranged on egg ⁇ ner, in particular designed as a plate, ferrite.
  • the ferrite arrangement is structured as a plate. This increases the inductance and thus minimizes the winding volume. Furthermore, such a ferrite bottom forces the (electro) magnetic field into the field of the other half space of the field or restricts the (electro) magnetic field to a total of one half space.
  • an arrangement for the wireless transmission of energy to an electric vehicle is proposed, which is characterized in that a charging station and / or electric vehicle is designed such that it is equipped with a described uses described above
  • Pancake coil is configured.
  • Figure la is a plan view of a first position
  • figure lb is a side view according to theticiansbei ⁇ play of the invention for power transmission to be used pancake coil.
  • FIGS. 1 a and 1 b like all variants according to the invention, has the
  • Pancake coil on the advantage that they ensure the inductive charging of vehicles (or their batteries) that the power-transmitting coils or by arranging two such coils, ie a vehicle in the vehicle and a charging station formed transformer system, if possible low-loss is executed.
  • a second requirement in the design of the coil system that fulfills the use according to the invention is the size of the individual coils, which are to be made as compact and flat as possible.
  • PANCAKE_SPULE_LAGE_2 of the pancake coil are configured as double-layer spiral coils of stranded wire with the same winding sense, wherein the first coil PANCAKE_SPULE_LAGE_1 is wound in the first position from the outside to the inside, and the second coil PANCAKE_SPULE_LAGE_2 is wound in the second layer from inside to outside.
  • the voltage-proof doors ⁇ voltage of the two layers by a thin composite sheet for example, FR4 board, FR_4_PLATTE is given.
  • a thin composite sheet for example, FR4 board, FR_4_PLATTE is given.
  • Alternatives to this or additions are Teflon film or paints.
  • the stranded wire at the end of the first winding passes through a bore in the composite plate FR_4_PLATTE to the other layer side of the composite plate FR_4_PLATTE. It can also be seen that this arrangement is mounted on a ferrite plate FERRITPLATTE.
  • the coil losses can be at least minimized by the design according to the invention as described here.

Abstract

The invention relates to a use and an assembly of pancake coils for wireless energy transmission to electric vehicles, at least a first coil required for energy transmission being designed as a pancake coil in order for energy to be transmitted in a wireless manner.

Description

Beschreibung description
Verwendung und Anordnung von Pencake-Spulen zur drahtlosen Energieübertragung an Elektrofahrzeuge Use and arrangement of pencake coils for wireless energy transmission to electric vehicles
Die Erfindung betrifft die Verwendung von so genannten The invention relates to the use of so-called
Pancake-Spulen zur drahtlosen Energieübertragung an Elektro- fahrzeuge gemäß dem Anspruch 1 sowie eine Anordnung zur drahtlosen Energieübertragung an Elektrofahrzeuge gemäß An- spruch 6. Pancake coils for wireless energy transmission to electric vehicles according to claim 1 and an arrangement for the wireless transmission of energy to electric vehicles according to claim 6.
Der Einsatz von Elektrofahrzeugen ist bekannt. Ferner ist es bekannt, dass derartige Fahrzeuge, sofern sie nicht über au¬ tonom beispielsweise über Solarzellen mit elektrischer Ener- gie versorgt werden, häufig über einen Energiespeicher verfügen, der regelmäßig mit neuer Energie geladen werden muss. The use of electric vehicles is known. It is also known that such vehicles where they have no access to au ¬ tonom example via solar cells with electrical power, often have an energy storage device, which must be periodically recharged with new energy.
Im Straßenverkehr befindliche Elektrofahrzeuge werden beim derzeitigen Stand der Technik mittels einer von einem Stecker zu einer passenden Kupplung hergestellten Verbindung an einer Ladestation angeschlossen. Hierzu sind Stationen mit entsprechenden Kabeln vorgesehen. Road-going electric vehicles are connected to a charging station in the current state of the art by means of a connection made from a plug to a mating coupling. For this purpose, stations with appropriate cables are provided.
Diese Stationen bzw. die Kabel sind der Witterung ausgesetzt und auch anderen äußeren Faktoren ausgesetzt, die zur Beeinträchtigung der Funktion beitragen können. These stations or cables are exposed to the weather and also exposed to other external factors that may contribute to the impairment of the function.
Um zu laden muss ferner diese Verbindung von Stecker und Kupplung manuell hergestellt werden. Was zu weiterem Schaden führen kann. In order to load also this connection must be made manually by male and female connectors. Which can lead to further damage.
Es ist auch bekannt eine Energieübertragung mittels Spulen durchzuführen. Für eine Anwendung im obigen Szenario besteht daher ein Bedürfnis auf dieser Technologie beruhende Lösungen zu finden. Aufgabe der vorliegenden Erfindung ist es eine derartige Lö¬ sung anzugeben, diesen Anforderungen besonders vorteilhaft löst . Diese Aufgabe wird durch die Merkmale des Anspruchs 1 sowie die Merkmale des Anspruches 6 gelöst. It is also known to carry out an energy transfer by means of coils. For an application in the above scenario, therefore, there is a need to find solutions based on this technology. The object of the present invention is to provide such a Lö ¬ solution, particularly advantageously solves these requirements. This object is solved by the features of claim 1 and the features of claim 6.
Erfindungsgemäß erfolgt eine Verwendung einer Pancake-Spule zur drahtlosen Energieübertragung an ein Elektrofahrzeug, wo- bei zur drahtlosen Übertragung zumindest eine erste Spule der zur Übertragung notwendigen Spulen als Pancake-Spule ausgestaltet ist. According to the invention, a pancake coil is used for the wireless transmission of energy to an electric vehicle, wherein at least a first coil of the coils required for transmission is designed as a pancake coil for wireless transmission.
Dies ermöglicht bzw. unterstützt die Automatisierung des La- devorgangs, da es lediglich erforderlich ist das Elektrofahr- zeug in geeigneter Weise in die Nähe der Ladespule zu brin¬ gen. Somit ist der Einsatz bei autonomen Elektrofahrzeugen wie sie aus Industrie bzw. in der Automatisierungstechnik bekannt sind, hierdurch unterstützt. Aber auch die einleitend genannten Nachteile von im Straßenverkehr befindlichen Elektrofahrzeugen und Ladeeinrichtungen werden überwunden. This enables or supports the automation charging is in progress, since it is only required the electric vehicle in an appropriate manner in the vicinity of the charging coil to brin ¬ gen. Thus, the use is in autonomous electric vehicles as from industry and in automation technology are known, thereby supported. But also the aforementioned disadvantages of on-road electric vehicles and charging devices are overcome.
Ferner zeichnet sich die Verwendung von Pancake-Spulen dadurch aus, dass sie kompakt und gleichzeitig flach ausgestal- tet sind, wobei die einzelnen Spulen eine hohe Güte aufwei¬ sen, die Effizienz der Energieübertragung steigert. Beides ist u.a. durch die in der Regel übliche Ausgestaltung von Pancake-Spulen gegeben, die dadurch gekennzeichnet ist, dass es sich um 2-lagige Spiralspulen aus Litzendraht gleichen Wicklungssinns handelt, wobei eine erste Spule, in einer ers¬ ten Lage von außen nach innen gewickelt und eine zweite Spule in einer zweiten Lage von innen nach außen gewickelt ist. Furthermore, the use of pancake coils is characterized in that they are compact and at the same time flat ausgestal- tet, wherein the individual coils a high quality aufwei ¬ sen, increases the efficiency of energy transfer. Both are given, inter alia, by the usually customary design of pancake coils, which is characterized in that it is 2-layer spiral coils of stranded wire same sense of winding, with a first coil, in a ers ¬ th location from outside to inside wound and a second coil is wound in a second layer from the inside out.
Vorteilhaft ist es dabei wenn die Verwendung derart weiterge¬ bildet wird, dass zur Verwendung der Pancake-Spule, Lagen der ersten Spule spannungsfest getrennt angeordnet sind. Bevorzugt wird dies dabei durch eine Weiterbildung derart re¬ alisiert, dass für die Verwendung zur spannungsfesten getrennten Anordnung der ersten Spule zumindest eine, insbesondere dünne, insbesondere aus FR4 oder seinen Derivaten gebil- dete, Platte g zwischen den Lagen angebracht ist. Dies zeich¬ net sich insbesondere durch stabile Lagerung der Spulen aber auch durch Optimierung der Energieübertragungsfunktion aus. Derivate sei hierbei als Verbundstoffe, die zur Verwendung als Leiterplattenmaterial ausgestaltet sind, definiert. It is advantageous if the use is weiterge ¬ forms such that, for the use of the pancake coil, layers of the first coil are arranged separated in a voltage-resistant manner. This is preferred in this ¬ alisiert such re, that at least one, in particular thin, in particular of FR4 or its derivatives finished gebil- for use in the tension resistive separate arrangement of the first coil plate g is provided between the layers by an improvement. This distinctive ¬ net in particular by stable storage of the coils but also by optimizing the energy transfer function. Derivatives here are defined as composites designed for use as circuit board material.
Alternativ oder ergänzend hierzu kann gemäß einer Weiterbil¬ dung dies derart realisiert sein, dass zur spannungsfesten getrennten Anordnung der ersten Spule, eine Teflonfolie zwischen den Lagen angebracht ist. Als Alternative hat es den Vorteil Raum zu sparen und als Ergänzung bietet es weitereAlternatively or in addition, to this, according to a wide Erbil ¬ dung this may be realized such that the tension resistive separate arrangement of the first coil, a Teflon film is mounted between the layers. As an alternative, it has the advantage of saving space and as a supplement, it offers more
Freiheitsgrade zur Optimierung der Energieübertragungsfunkti¬ on durch entsprechende Dimensionierung. Degrees of freedom for optimizing the Energieübertragungsfunkti ¬ on by appropriate dimensioning.
Eine weitere Alternative oder Ergänzung ist gegeben, wenn die Verwendung derart erfolgt, dass zur spannungsfesten getrennten Anordnung der ersten Spule, mindestens eine aufgetragene Lackschicht zwischen den Lagen angebracht ist. Dies bietet eine weitere Raumeinsparungsmöglichkeit bzw. Freiheitsgrade zur Optimierung der Energieübertragungsfunktion. Another alternative or supplement is given if the use is such that at least one applied lacquer layer between the layers is attached to the voltage-resistant separate arrangement of the first coil. This offers a further space saving possibility or degrees of freedom for optimizing the energy transfer function.
Vorzugsweise ist die erfindungsgemäße Pancake-Spule auf ei¬ ner, insbesondere als Platte ausgestalten, Ferritanordnung angeordnet. Insbesondere ist die Ferritanordnung als Platte strukturiert. Hierdurch wird die Induktivität erhöht und da- mit das Wickelvolumen zu minimiert. Außerdem zwingt ein derartiger Ferritboden das (elektro- ) magnetische Feld in das Feld des anderen Halbraums des Feldes bzw. beschränkt das (elektro) magnetische Feld auf insgesamt einen Halbraum. Erfindungsgemäß wird auch eine Anordnung zur drahtlosen Energieübertragung an ein Elektrofahrzeug vorgeschlagen, die dadurch gekennzeichnet ist, dass eine Ladestation und/oder Elektrofahrzeug derart ausgestaltet ist, dass es mit einer der vorgehend beschriebenen Verwendungen beschriebenen Preferably, the pancake coil of the invention is arranged on egg ¬ ner, in particular designed as a plate, ferrite. In particular, the ferrite arrangement is structured as a plate. This increases the inductance and thus minimizes the winding volume. Furthermore, such a ferrite bottom forces the (electro) magnetic field into the field of the other half space of the field or restricts the (electro) magnetic field to a total of one half space. According to the invention, an arrangement for the wireless transmission of energy to an electric vehicle is proposed, which is characterized in that a charging station and / or electric vehicle is designed such that it is equipped with a described uses described above
Pancake-Spule ausgestaltet ist. Pancake coil is configured.
Weitere Vorteile und Einzelheiten der Erfindung werden anhand eines in den Figuren la und lb gezeigten Ausführungsbeispiels erläutert. Dabei zeigt die Further advantages and details of the invention will be explained with reference to an embodiment shown in the figures la and lb. It shows the
Figur la eine Draufsicht auf eine erste Lage, Figur lb eine Seitenansicht auf die gemäß Ausführungsbei¬ spiel der Erfindung zur Energieübertragung zu verwendeten Pancake-Spule. Figure la is a plan view of a first position, figure lb is a side view according to the Ausführungsbei ¬ play of the invention for power transmission to be used pancake coil.
Das in den Figuren la und lb dargestellte Ausführungsbei- spiel, weist wie alle erfindungsgemäßen Varianten der The exemplary embodiment illustrated in FIGS. 1 a and 1 b, like all variants according to the invention, has the
Pancake-Spule den Vorteil auf, dass sie beim induktiven Laden von Fahrzeugen (bzw. deren Batterien) sicherstellen, dass die leistungsübertragenden Spulen bzw. das durch Anordnung zweier solcher Spulen, also eine im Fahrzeug und eine in einer Lade- Station gebildete Trafosystem, möglichst verlustarm ausgeführt ist.  Pancake coil on the advantage that they ensure the inductive charging of vehicles (or their batteries) that the power-transmitting coils or by arranging two such coils, ie a vehicle in the vehicle and a charging station formed transformer system, if possible low-loss is executed.
Dies erfordert ein Spulensystem mit möglichst hohen Güten der Einzelspulen, wie es durch die erfindungsgemäße Verwendung von Pancake-Spule gebildet werden kann. This requires a coil system with the highest possible quality of the individual coils, as it can be formed by the inventive use of pancake coil.
Eine zweite Anforderung beim Design des Spulensystems, die die erfindungsgemäße Verwendung erfüllt, ist die Größe der Einzelspulen, welche möglichst kompakt und flach auszuführen sind. A second requirement in the design of the coil system that fulfills the use according to the invention is the size of the individual coils, which are to be made as compact and flat as possible.
Dies wird im dargestellten Beispiel gemäß einer besonders vorteilhaften Ausgestaltung auf einer Ferritfläche ausgeführt, welche die Vorteile aufweist, dass die elektro- magnetische Feldverteilung auf einen Halbraum begrenzt und den Induktivitätswert der Pancake-Spule zu erhöht bzw. da¬ durch das Wicklungsvolumen erniedrigt wird. Damit hebt sich die Erfindung deutlich von der Verwendung von einlagigen Spiralspulen oder Kombinationen daraus, wie beispielsweise Anordnungen als so genanntes „Butterfly", ab. Der Einsatz von Pancake-Spulen, wie in Figur la (Draufsicht) und lb (Seitenansicht) dargestellt, bedient die beiden Anfor¬ derungen optimal, dabei ist bei dem dargestellten Ausführungsbeispiel die Spulen PANCAKE_SPULE_LAGE_1 , This is carried out in the illustrated example according to a particularly advantageous embodiment on a ferrite surface, which has the advantages that limits the electromagnetic magnetic field distribution to a half space and increases the inductance value of the pancake coil or da ¬ reduced by the winding volume. Thus, the invention stands out clearly from the use of single-layer spiral coils or combinations thereof, such as arrangements as so-called "butterfly." The use of pancake coils, as shown in Figure la (top view) and lb (side view) operated the two Anfor ¬ requirements optimal, while in the illustrated embodiment, the coil PANCAKE_SPULE_LAGE_1,
PANCAKE_SPULE_LAGE_2 der Pancake-Spule als zweilagige Spiral- spulen aus Litzendraht gleichen Wicklungssinns ausgestaltet, wobei die erste Spule PANCAKE_SPULE_LAGE_1 in der ersten Lage von außen nach innen gewickelt wird, und die zweite Spule PANCAKE_SPULE_LAGE_2 in der zweiten Lage von innen nach außen gewickelt ist.  PANCAKE_SPULE_LAGE_2 of the pancake coil are configured as double-layer spiral coils of stranded wire with the same winding sense, wherein the first coil PANCAKE_SPULE_LAGE_1 is wound in the first position from the outside to the inside, and the second coil PANCAKE_SPULE_LAGE_2 is wound in the second layer from inside to outside.
Gemäß Ausführungsbeispiel ist dabei die spannungsfeste Tren¬ nung der beiden Lagen durch eine dünne Verbundstoffplatte, beispielsweise FR4-Platte, FR_4_PLATTE gegeben. Alternativen hierzu bzw. Ergänzungen sind Teflonfolie oder Lacke. According to embodiment, the voltage-proof doors ¬ voltage of the two layers by a thin composite sheet, for example, FR4 board, FR_4_PLATTE is given. Alternatives to this or additions are Teflon film or paints.
Wie zu erkennen ist, geht dabei der Litzendraht am Ende der ersten Wicklung durch eine Bohrung in der Verbundstoffplatte FR_4_PLATTE auf die andere Lagenseite der Verbundstoffplatte FR_4_PLATTE . Ferner ist zu erkennen, dass diese Anordnung auf einer Ferritplatte FERRITPLATTE angebracht ist. As can be seen, the stranded wire at the end of the first winding passes through a bore in the composite plate FR_4_PLATTE to the other layer side of the composite plate FR_4_PLATTE. It can also be seen that this arrangement is mounted on a ferrite plate FERRITPLATTE.
Um die (elektro) magnetische Feldverteilung der Pancakespule auf einen Halbraum zu begrenzen und den Induktivitätswert der Pancake-Spule zu erhöhen (um damit Windungen und Volumen zu sparen) , liegt diese auf einer Ferritfläche, beispielsweise als Platte FERRITPLATTE oder sternförmige Ferritanordnung oder ähnlichen Ferritanordnung ausgestaltet. Diese stellt sicher, dass das (elektro- ) magnetische Feld des anderen Halb- raums des Feldes in die Ferritfläche gezwungen wird. Dadurch ist der Einfluss eines Metallbodens vernachlässigbar bzw. es kann dadurch eine Feldabschirmung sichergestellt werden. Bei einer Versuchsanordnung unter Verwendung der in Figur la und lb dargestellten Ausführungsform zeigten sich durch die Erfindung erreichbare Werte für einen erfindungsgemäßen Einsatz von einer Induktivität von L225yH und Q=1000 bei einer Frequenz f=100kHz. In order to limit the (electro) magnetic field distribution of the pancake coil to a half-space and to increase the inductance value of the pancake coil (in order to save turns and volume), this is on a ferrite surface, designed for example as a plate FERRITPLATTE or star-shaped ferrite or similar ferrite , This ensures that the (electro-) magnetic field of the other half-space of the field is forced into the ferrite surface. As a result, the influence of a metal bottom is negligible or it can be ensured by a field shield. In an experimental setup using the embodiment illustrated in FIGS. 1a and 1b, the values achievable by the invention for an inventive use have shown an inductance of L225yH and Q = 1000 at a frequency f = 100 kHz.
Q bezeichnete dabei die Spulengüte, die mit einem Wert von 1000 bei 100kHz, gemäß Beispiel mit Kupfer als Basismaterial und bei Raumtemperatur ein Optimum darstellt, welches bei dieser Frequenz durch die Erfindung erreicht werden kann, es beschreibt das Verhältnis der Reaktanz=2*pi*f*L zu einem Verlustwiderstand R, ist also ein Maßstab für die Spulenverlus¬ te . Die Spulenverluste können wie ersichtlich ist durch erfindungsgemäße Ausführung, wie hier beschrieben, zumindest minimiert werden. Q denotes the coil quality, which is an optimum at a value of 1000 at 100 kHz, according to the example with copper as base material and at room temperature, which can be achieved at this frequency by the invention; it describes the ratio of the reactance = 2 * pi * f * L to a loss resistance R, so is a measure of the Spulenverlus ¬ te. As can be seen, the coil losses can be at least minimized by the design according to the invention as described here.
Der Vorteil dieser Spulenart ist die optimale Nutzung der 2. Lage im Vergleich der Nutzung von einlagigen Spiralspulen.The advantage of this type of coil is the optimal use of the second layer compared to the use of single-layer spiral coils.
Denn die Rückführung des Spulendrahtes der einlagigen Spule, der dort zwingend notwendig wäre, einen größeren Spulendurchmesser bei gleichbleibender Höhe erforderlich macht. Durch die Erfindung können somit hochgütige Spulen bei opti¬ maler Ausnutzung des Volumens realisiert werden. Because the return of the coil wire of the single-layer coil, which would be absolutely necessary there, makes a larger coil diameter at the same height required. The invention thus high-quality coils can be realized with opti ¬ painter utilization of the volume.

Claims

Verwendung einer Pancake-Spule zur drahtlosen Energieübertragung an ein Elektrofahrzeug, dadurch gekennzeichnet, dass zur drahtlosen Übertragung zumindest ei¬ ne erste Spule der zur Übertragung notwendigen Spulen als Pancake-Spule ausgestaltet ist. Use of a pancake coil for wireless energy transmission to an electric vehicle, characterized in that at least ei ¬ ne first coil of the necessary coils for transmission as a pancake coil is designed for wireless transmission.
Verwendung nach Anspruch 1, dadurch gekennzeichnet, dass zur Verwendung der Pancake-Spule, Lagen der ersten Spule spannungsfest getrennt angeordnet sind. Use according to claim 1, characterized in that, for the use of the pancake coil, layers of the first coil are arranged separated in a voltage-proof manner.
Verwendung nach Anspruch 2, dadurch gekennzeichnet, dass zur spannungsfesten getrennten Anordnung der ersten Spule eine, insbesondere dünne, insbesondere aus FR4 oder seinen Derivaten gebildete, Platte zwischen den Lagen angebracht ist. Use according to claim 2, characterized in that for the voltage-resistant separate arrangement of the first coil a, in particular thin, in particular made of FR4 or its derivatives, plate is mounted between the layers.
Verwendung nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass zur spannungsfesten getrennten Anordnung der ersten Spule, eine Teflonfolie zwischen den Lagen ange¬ bracht ist. Use according to claim 2 or 3, characterized in that for the voltage-resistant separate arrangement of the first coil, a Teflon film between the layers is ¬ introduced .
Verwendung nach einem der Ansprüche 2 bis 3, dadurch gekennzeichnet, dass zur spannungsfesten getrennten Anordnung der ersten Spule, mindestens eine aufgetragene Lackschicht zwischen den Lagen angebracht ist. Use according to one of claims 2 to 3, characterized in that for the voltage-resistant separate arrangement of the first coil, at least one applied lacquer layer between the layers is attached.
Verwendung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, die Pancake-Spule auf einer, ins¬ besondere als Platte ausgestaltete, Ferritstruktur an¬ geordnet ist. Use according to one of the preceding claims, characterized in that the pancake coil on a special into ¬ as a plate configured, ferrite is at ¬ sorted.
Anordnung zur drahtlosen Energieübertragung an ein Elektrofahrzeug, dadurch gekennzeichnet, dass eine La¬ destation und/oder Elektrofahrzeug derart ausgestaltet ist, dass es mit einer nach einem der Verwendungsan- sprüche 1 bis 6 verwendeten Pancake-Spule ausgestaltet Arrangement for wireless transfer of energy to an electric vehicle, characterized in that a La ¬ destation and / or electric vehicle is configured such that it with a according to one of Verwendungsan- Proverbs 1 to 6 used pancake coil designed
EP16707004.4A 2015-03-03 2016-02-19 Use and assembly of pancake coils for wireless energy transmission to electric vehicles Withdrawn EP3245660A1 (en)

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DE102015203796.7A DE102015203796A1 (en) 2015-03-03 2015-03-03 Use and arrangement of pencake coils for wireless energy transmission to electric vehicles
PCT/EP2016/053517 WO2016139072A1 (en) 2015-03-03 2016-02-19 Use and assembly of pancake coils for wireless energy transmission to electric vehicles

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WO2016139072A1 (en) 2016-09-09
DE102015203796A1 (en) 2016-09-08
US20180286576A1 (en) 2018-10-04
CN107278321A (en) 2017-10-20
JP2018513661A (en) 2018-05-24

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