WO2013125372A1 - Coil unit and contactless power supply system - Google Patents

Coil unit and contactless power supply system Download PDF

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Publication number
WO2013125372A1
WO2013125372A1 PCT/JP2013/053046 JP2013053046W WO2013125372A1 WO 2013125372 A1 WO2013125372 A1 WO 2013125372A1 JP 2013053046 W JP2013053046 W JP 2013053046W WO 2013125372 A1 WO2013125372 A1 WO 2013125372A1
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WO
WIPO (PCT)
Prior art keywords
coil
coil unit
storage space
housing
resin
Prior art date
Application number
PCT/JP2013/053046
Other languages
French (fr)
Japanese (ja)
Inventor
未規 小泉
Original Assignee
住友電気工業株式会社
住友電装株式会社
株式会社オートネットワーク技術研究所
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Application filed by 住友電気工業株式会社, 住友電装株式会社, 株式会社オートネットワーク技術研究所 filed Critical 住友電気工業株式会社
Publication of WO2013125372A1 publication Critical patent/WO2013125372A1/en

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Classifications

    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • 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
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • 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
    • 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
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • 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 present invention relates to a coil unit that performs at least one of power transmission and power reception by electromagnetic induction, and a non-contact power feeding system having the coil unit on the power transmission side and the power reception side.
  • Non-Patent Document 1 As a coil unit used for a non-contact power transmission and reception system by electromagnetic induction, one having a coil and a capacitor electrically connected to the coil is known (see, for example, Non-Patent Document 1). Since a relatively large air gap exists between the power transmission coil and the power reception coil, the coupling coefficient is low, the leakage inductance is large, and the power supply efficiency is reduced. Therefore, a capacitor is connected to the coil to form a resonant circuit, and the resonant circuit is intended to improve the feeding efficiency.
  • the coil unit needs to have strength.
  • An object of the present invention is to provide a coil unit capable of securing strength while unitizing a coil and a capacitor.
  • the coil unit according to the embodiment of the present invention is a coil unit that performs at least one of power transmission and power reception by electromagnetic induction, and the coil, a capacitor electrically connected to the coil, and nonmagnetic
  • the housing is made of a material and has an opening at one side, and the internal space is divided by the partition wall into a first housing space in which the coil is housed and a second housing space in which the capacitor is housed, and the opening And a lid for closing an area corresponding to the second storage space, wherein the first storage space is filled with resin so as to cover the coil stored in the first storage space, and the resin is stored in the first storage space. It is characterized in that it is hardened inside the space.
  • a coil unit capable of securing strength while unitizing a coil and a capacitor.
  • the coil unit according to the embodiment of the present invention is a coil unit that performs at least one of power transmission and power reception by electromagnetic induction, and a coil and a capacitor electrically connected to the coil And a housing made of a nonmagnetic material and having an opening at one side, and the internal space thereof being divided by the partition wall into a first housing space in which the coil is housed and a second housing space in which the capacitor is housed. And a lid closing an area corresponding to the second storage space among the openings, and the first storage space is filled with a resin so as to cover the coil stored in the first storage space, and the resin is It is characterized in that it is cured inside the first storage space.
  • the rigidity is increased and the strength of the coil unit is improved.
  • the second storage space is closed by the lid, so that the capacitor can be protected, and the first storage space can be filled with a resin and the coil can be protected by hardening the resin.
  • the housing may be divided into a first storage space and a plurality of second storage spaces by the plurality of partition walls.
  • the rigidity of the casing is further enhanced by the plurality of partition walls, and the strength of the coil unit is further improved.
  • electromagnetic induction does not mean only the “electromagnetic induction method” which is often used when the gap between the power transmission side and the power reception side is close, and the gap It is used in the sense that it can also transmit power even when it is relatively large, including the so-called “resonance system”.
  • the housing extends from the bottom to form the bottom of the first and second storage spaces, the side wall extending from each side of the bottom, and two opposing side walls. And the partition wall portion having the same height as the side wall portion.
  • the side wall portion of the housing is provided with a lead-out portion of a wire connected to the coil and the capacitor.
  • a takeout portion By providing such a takeout portion, connection of the wiring to the coil unit can be easily performed, and mounting on various devices becomes easy.
  • the housing is made of a metal nonmagnetic material containing aluminum or a resin material in which a region facing the first storage space is covered with a metal foil. If the casing is made of these materials, the magnetic flux leakage from the coil can be shielded to increase the coupling coefficient, and the strength can be ensured while achieving weight reduction.
  • a lid made of a resin is further provided so as to cover the resin filled in the first storage space.
  • the strength of the coil unit can be further improved without reducing the coupling coefficient.
  • a non-contact power feeding system includes the above-described coil unit mounted on a vehicle and the above-described coil unit installed near the ground, and the coil unit on the vehicle side and the ground
  • the coil units on the side are arranged such that the opening sides of the casing face each other. The reason for arranging in this way is that when the bottom of the case is arranged facing the other, the coupling coefficient of the magnetic field decreases.
  • FIG. 1 is a block diagram which shows the non-contact electric power feeding system which concerns on this embodiment.
  • the noncontact power feeding system includes a vehicle 1 and a power feeding device 11.
  • vehicle 1 includes a coil unit CU ⁇ b> 1, a rectifier 3, and a capacitor 5.
  • the configuration of the vehicle 1 is not limited to the configuration shown in FIG. 1 as long as the vehicle is driven by a motor.
  • it includes a plug-in hybrid vehicle including a motor and an internal combustion engine.
  • the coil unit CU1 is connected to the storage battery 5 via the rectifier 3.
  • the coil unit CU1 includes a coil L1 and a capacitor C1 (resonance capacitor) electrically connected to the coil L1.
  • the capacitor C1 is connected in series to the coil L1.
  • the capacitor C1 may be connected in parallel to the coil L1.
  • the power supply device 11 includes a power supply 13, an inverter unit 15, and a coil unit CU2.
  • the coil unit CU2 is connected to the power supply 13 via the inverter unit 15.
  • the coil unit CU2 includes a coil L2 and a capacitor C2 (resonance capacitor) electrically connected to the coil L2.
  • the capacitor C2 is connected in series to the coil L2.
  • the capacitor C2 may be connected in parallel to the coil L2.
  • the coil unit CU1 receives power from the coil unit CU2 (coil L2) contactlessly by electromagnetic induction.
  • the rectifier 3 rectifies the AC power extracted by the coil unit CU1 and outputs the rectified power to the capacitor 5.
  • the capacitor 5 is a rechargeable DC power source, and includes, for example, a secondary battery such as lithium ion or nickel hydrogen. A large capacity capacitor can also be adopted as the capacitor 5.
  • Coil unit CU1 is mounted, for example, at the lower part of the vehicle body.
  • the power source 13 is a power source external to the vehicle, and is, for example, a commercial power source.
  • the inverter unit 15 converts the power received from the power supply 13 into power of a predetermined frequency, and supplies the converted power of the predetermined frequency to the coil unit CU2.
  • Coil unit CU2 is installed, for example, near the ground.
  • the coil unit CU2 (coil L2) transmits power to the coil unit CU1 (coil L1) by electromagnetic induction.
  • FIGS. 2 and 3 are perspective views showing the coil unit.
  • FIG. 4 is an exploded perspective view showing the coil unit.
  • illustration of the lid 23 and resin 45 which are mentioned later is abbreviate
  • the coil unit CU1 and the coil unit CU2 have the same structure.
  • the coil units CU1 and CU2 include a housing 21 and a lid 23 in addition to the coils L1 and L2 and the capacitors C1 and C2 described above.
  • the coils L ⁇ b> 1 and L ⁇ b> 2 are configured by the conducting wire 33 wound around the core 31.
  • the core 31 is made of a magnetic material such as ferrite.
  • the core 31 has a flat plate shape.
  • a litz wire can be used for the lead 33.
  • the capacitors C1 and C2 are formed of a plurality of capacitor elements 35.
  • the plurality of capacitor elements 35 are mounted on the substrate 37.
  • the housing 21 is a member made of a nonmagnetic material in which the coils L1 and L2 and the capacitors C1 and C2 are accommodated, and has a rectangular shape in a plan view, and is a boxed member with an opening at one end. is there.
  • the housing 21 is made of aluminum. Since the casing 21 is made of aluminum, the leakage magnetic flux can be shielded to increase the coupling coefficient, and the strength can be secured while achieving weight reduction.
  • the housing 21 has a bottom 21a, a side wall 21b, and a partition 21c.
  • the bottom 21a has a rectangular shape, and the side wall 21b extends in a direction perpendicular to the bottom 21a from each side of the bottom 21a.
  • the partition wall 21c extends from the bottom 21a in a direction perpendicular to the bottom 21a so as to extend across the two opposing side walls 21b. Thereby, the internal space of the housing 21 is divided into the first storage space S1 and the second storage space S2.
  • the coils L1 and L2 are stored in the first storage space S1.
  • the coils L1 and L2 are fixed by the placement portion 25 disposed in the area facing the first storage space S1 of the bottom portion 21a and the pressing portion 43 removably attached to the placement portion 25.
  • the end portion of the core 31 is fixed to the housing 21 by being held between the mounting portion 25 and the pressing portion 43.
  • the first storage space S1 is filled with a resin 45 so as to cover the coils L1 and L2 stored in the first storage space S1.
  • a resin 45 can be used as the resin 45.
  • the resin 45 is obtained by storing the coils L1 and L2 in the first storage space S1, injecting the resin 45 before curing into the first storage space S1, and then curing the resin 45.
  • the capacitors C1 and C2 (a plurality of capacitor elements 35) are accommodated in the second accommodation space S2.
  • the capacitors C1 and C2 are stored in the second storage space S2 by attaching the substrate 37 on which the plurality of capacitor elements 35 are mounted to a region of the bottom 21a facing the second storage space S2.
  • the region corresponding to the second storage space S2 in the opening of the housing 21 is closed by the lid 23.
  • the lid 23 faces the area facing the second storage space S2 of the bottom 21a, and is detachably attached to the housing 21.
  • the material of the lid 23 is not particularly limited as long as it is a nonmagnetic material, but in order to enhance the rigidity of the housing 21, it is preferable to be made of metal (for example, made of aluminum).
  • the wiring W1 is connected to one end of the coils L1 and L2 (Ritz wire).
  • the wiring W2 is connected to a terminal electrode (not shown) of the substrate 37, and thereby electrically connected to the capacitors C1 and C2 (a plurality of capacitor elements 35).
  • the other ends of the coils L1 and L2 (litz wire) are connected to a terminal electrode (not shown) disposed on the substrate 37, and thereby connected in series to the capacitors C1 and C2.
  • the coil unit CU1 and the coil unit CU2 are arranged such that the opening sides of the housing 21 face each other. That is, coil unit CU1 is mounted on vehicle 1 so that the opening side of case 21 faces downward, and coil unit CU2 is installed near the ground so that the opening side of case 21 faces upward.
  • the case 21 since the case 21 includes the partition wall 21c for defining the first storage space S1 and the second storage space S2, the rigidity is increased, and the coil unit is increased.
  • the strength of CU1 and CU2 is improved. Since the second storage space S2 is closed by the lid 23, the capacitors C1 and C2 can be protected, and since the first storage space S1 is filled with the resin 45, the coils L1 and L2 can be protected.
  • the rigidity of the case 21 is enhanced also by the attachment of the lid 23 to the case 21 and the filling of the first storage space S1 with the resin 45, and the strength of the coil units CU1 and CU2 Improve further.
  • the electrical insulation of the coils L1 and L2 can be secured.
  • the extraction portions 47 of the plurality of wires W1 and W2 electrically connected to the coils L1 and L2 and the capacitors C1 and C2 are provided.
  • connection of the wires W1 and W2 to the coil units CU1 and CU2 can be easily performed, and mounting on various devices can be easily performed.
  • FIG.5 and FIG.6 is a perspective view which shows the modification of a coil unit.
  • the lid 23 and the resin 45 are not shown.
  • the housing 21 is divided into a first storage space S1 and a plurality of second storage spaces S2 by the plurality of partition walls 21c.
  • the internal space of the housing 21 is divided into one first storage space S1 and two second storage spaces S2 by two partition walls 21c.
  • the first storage space S1 is located between the two second storage spaces S2.
  • the housing 21 has a plurality of partition walls 21c (two partition walls 21c). Therefore, the rigidity of the housing 21 is further enhanced, and the strength of the coil units CU1 and CU2 is further improved.
  • the first storage space S1 is located between the two second storage spaces S2, the first storage space S1, that is, the coils L1 and L2 are located at the central portions of the coil units CU1 and CU2. It will be done. As a result, the degree of freedom in designing the mounting positions of the coil units CU1 and CU2 is improved.
  • the internal space of the housing 21 is divided into the first storage space S1 and the two second storage spaces S2 by the two partition walls 21c, but the invention is not limited thereto.
  • the internal space of the housing 21 may be divided into one first storage space S1 and three or more second storage spaces S2 by three or more partition walls 21c.
  • the present invention is not limited to this.
  • a resin for example, a fiber reinforced plastic (FRP) made of carbon fiber or the like
  • FRP fiber reinforced plastic
  • a member such as foil or copper foil may be attached.
  • a lid made of a resin may be further provided to cover the resin 45 filled in the first storage space S1.
  • the rigidity of the housing 21 is further enhanced, and the strength of the coil units CU1 and CU2 is further improved.
  • metal lid When the first storage space S1 is covered with a metal lid, metal is inserted into the magnetic path for transmitting power, and the coupling coefficient is reduced. In addition, depending on the metal, an eddy current may occur and the lid may generate heat.
  • the non-contact power feeding system for a vehicle has been described as an example in the present embodiment, the present invention is not limited to this, and can be applied to a mobile body other than a vehicle, an electric product, and the like.
  • the present invention is applicable to a noncontact power feeding system.

Abstract

The present invention relates to coil units (CU1, CU2) that at least send or receive electrical power through electromagnetic induction. These coil units (CU1, CU2) comprise the following: coils (L1, L2); capacitors (C1, C2) that are electrically connected to the coils (L1, L2); a casing (21) that comprises a non-magnetic material and has an opening on one side and the interior space of which is divided by a partition wall section (21c) into a first housing space (S1) in which the coils (L1, L2) are housed, and a second housing space (S2) in which the capacitors (C1, C2) are housed; and a lid (23) that blocks the region of the opening corresponding to the second housing space (S2). The first housing space (S1) is filled with resin so as to cover the coils (L1, L2) housed therein.

Description

コイルユニット及び非接触給電システムCoil unit and noncontact power feeding system
　本発明は、電磁誘導によって、電力の送電及び受電の少なくともいずれか一方を行うコイルユニットと、このコイルユニットを送電側と受電側にそれぞれ有する非接触給電システムに関する。 The present invention relates to a coil unit that performs at least one of power transmission and power reception by electromagnetic induction, and a non-contact power feeding system having the coil unit on the power transmission side and the power reception side.
　電磁誘導による非接触送受電システムに用いられるコイルユニットとして、コイルと、コイルに電気的に接続されたコンデンサと、を備えるものが知られている（たとえば、非特許文献１参照）。送電側のコイルと受電側のコイルとの間に比較的大きな空隙が存在するため、結合係数が低く、漏れインダクタンスが大きくなり、給電効率が低下する。
　そこで、コイルにコンデンサを接続して共振回路を構成し、この共振回路により給電効率の改善を図っている。 As a coil unit used for a non-contact power transmission and reception system by electromagnetic induction, one having a coil and a capacitor electrically connected to the coil is known (see, for example, Non-Patent Document 1). Since a relatively large air gap exists between the power transmission coil and the power reception coil, the coupling coefficient is low, the leakage inductance is large, and the power supply efficiency is reduced.
Therefore, a capacitor is connected to the coil to form a resonant circuit, and the resonant circuit is intended to improve the feeding efficiency.
　ところで、コイルユニットを搭載する箇所によっては、コイル及びコンデンサを保護するために、コイルユニットに強度が必要となる。 By the way, depending on the location where the coil unit is mounted, in order to protect the coil and the capacitor, the coil unit needs to have strength.
　本発明は、コイルとコンデンサとをユニット化しつつ、強度を確保することが可能なコイルユニットを提供することを目的とする。 An object of the present invention is to provide a coil unit capable of securing strength while unitizing a coil and a capacitor.
　本発明の実施の形態に係るコイルユニットは、電磁誘導によって、電力の送電及び受電の少なくともいずれか一方を行うコイルユニットであって、コイルと、コイルに電気的に接続されたコンデンサと、非磁性材料からなり、一方に開口を有すると共に、その内部空間が仕切壁部によりコイルが収納される第一収納空間とコンデンサが収納される第二収納空間とに画された筐体と、開口のうち第二収納空間に対応する領域を閉じる蓋体と、を備え、第一収納空間には、第一収納空間に収納されたコイルを覆うように、樹脂が充填され、前記樹脂が前記第一収納空間の内部で硬化していることを特徴とする。 The coil unit according to the embodiment of the present invention is a coil unit that performs at least one of power transmission and power reception by electromagnetic induction, and the coil, a capacitor electrically connected to the coil, and nonmagnetic The housing is made of a material and has an opening at one side, and the internal space is divided by the partition wall into a first housing space in which the coil is housed and a second housing space in which the capacitor is housed, and the opening And a lid for closing an area corresponding to the second storage space, wherein the first storage space is filled with resin so as to cover the coil stored in the first storage space, and the resin is stored in the first storage space. It is characterized in that it is hardened inside the space.
　本発明によれば、コイルとコンデンサとをユニット化しつつ、強度を確保することが可能なコイルユニットを提供することができる。 According to the present invention, it is possible to provide a coil unit capable of securing strength while unitizing a coil and a capacitor.
本実施形態に係る非接触給電システムを示す構成図である。It is a block diagram showing the non-contact electric supply system concerning this embodiment. コイルユニットを示す斜視図である。It is a perspective view showing a coil unit. コイルユニットを示す斜視図である。It is a perspective view showing a coil unit. コイルユニットを示す分解斜視図である。It is an exploded perspective view showing a coil unit. コイルユニットの変形例を示す斜視図である。It is a perspective view which shows the modification of a coil unit. コイルユニットの変形例を示す斜視図である。It is a perspective view which shows the modification of a coil unit.
　前述の通り、本発明の実施の形態に係るコイルユニットは、電磁誘導によって、電力の送電及び受電の少なくともいずれか一方を行うコイルユニットであって、コイルと、コイルに電気的に接続されたコンデンサと、非磁性材料からなり、一方に開口を有すると共に、その内部空間が仕切壁部によりコイルが収納される第一収納空間とコンデンサが収納される第二収納空間とに画された筐体と、開口のうち第二収納空間に対応する領域を閉じる蓋体と、を備え、第一収納空間には、第一収納空間に収納されたコイルを覆うように、樹脂が充填され、前記樹脂が前記第一収納空間の内部で硬化していることを特徴とする。 As described above, the coil unit according to the embodiment of the present invention is a coil unit that performs at least one of power transmission and power reception by electromagnetic induction, and a coil and a capacitor electrically connected to the coil And a housing made of a nonmagnetic material and having an opening at one side, and the internal space thereof being divided by the partition wall into a first housing space in which the coil is housed and a second housing space in which the capacitor is housed. And a lid closing an area corresponding to the second storage space among the openings, and the first storage space is filled with a resin so as to cover the coil stored in the first storage space, and the resin is It is characterized in that it is cured inside the first storage space.
　本発明の実施の形態に係るコイルユニットでは、筐体は仕切壁部を有することとなるため、剛性が高くなり、コイルユニットの強度が向上する。
　また、第二収納空間が蓋体により閉じられることにより、コンデンサを保護することができるとともに、第一収納空間に樹脂が充填されてこれが硬化することにより、コイルを保護することができる。 In the coil unit according to the embodiment of the present invention, since the casing has the partition wall portion, the rigidity is increased and the strength of the coil unit is improved.
In addition, the second storage space is closed by the lid, so that the capacitor can be protected, and the first storage space can be filled with a resin and the coil can be protected by hardening the resin.
　また、筐体は、内部空間が複数の仕切壁部により第一収納空間と複数の第二収納空間とに画されていてもよい。この場合、複数の仕切壁部により、筐体の剛性がより一層高くなり、コイルユニットの強度が更に向上する。 In addition, the housing may be divided into a first storage space and a plurality of second storage spaces by the plurality of partition walls. In this case, the rigidity of the casing is further enhanced by the plurality of partition walls, and the strength of the coil unit is further improved.
　なお、本明細書において、「電磁誘導によって」とは、送電側と受電側の間のギャップが近接している場合に多用される「電磁誘導方式」のみを意味するものではなく、そのギャップが比較的大きい場合でも電力伝送できる、いわゆる「共鳴方式」をも含む意味で使用している。 In the present specification, "by electromagnetic induction" does not mean only the "electromagnetic induction method" which is often used when the gap between the power transmission side and the power reception side is close, and the gap It is used in the sense that it can also transmit power even when it is relatively large, including the so-called "resonance system".
　また、前記筐体は、例えば、前記第一及び第二収納空間の底面を構成する底部と、前記底部の各辺から立設された側壁部と、対向する２つの側壁部にわたるように前記底部に立設され、前記側壁部と同じ高さの前記仕切壁部とを有する部材で構成してもよい。 In addition, for example, the housing extends from the bottom to form the bottom of the first and second storage spaces, the side wall extending from each side of the bottom, and two opposing side walls. And the partition wall portion having the same height as the side wall portion.
　また、前記筐体の前記側壁部には、前記コイル及び前記コンデンサに接続された配線の取出し部が設けられていることが好ましい。
　かかる取出し部を設けることにより、コイルユニットへの配線の接続を容易に行うことができ、各種装置への搭載が容易になるからである。 Preferably, the side wall portion of the housing is provided with a lead-out portion of a wire connected to the coil and the capacitor.
By providing such a takeout portion, connection of the wiring to the coil unit can be easily performed, and mounting on various devices becomes easy.
　また、前記筐体は、アルミニウムを含む金属製の非磁性材料、または、前記第一収納空間に面する領域を金属泊で覆った樹脂製材料よりなることが好ましい。
　これらの材料で筐体を構成すれば、コイルからの漏れ磁束を遮蔽して結合係数を高められるとともに、軽量化を図りつつ強度を確保することができる。 Further, it is preferable that the housing is made of a metal nonmagnetic material containing aluminum or a resin material in which a region facing the first storage space is covered with a metal foil.
If the casing is made of these materials, the magnetic flux leakage from the coil can be shielded to increase the coupling coefficient, and the strength can be ensured while achieving weight reduction.
　また、前記第一収納空間に充填された前記樹脂を覆うように、更に、樹脂製の蓋体が設けられていることが好ましい。
　この場合、結合係数を低下させることなく、コイルユニットの強度をより一層向上させることができる。 Moreover, it is preferable that a lid made of a resin is further provided so as to cover the resin filled in the first storage space.
In this case, the strength of the coil unit can be further improved without reducing the coupling coefficient.
　本発明の実施の形態に係る非接触給電システムは、車両に搭載された上述のコイルユニットと、地面近傍に設置された上述のコイルユニットと、を備えており、車両側の前記コイルユニットと地面側の前記コイルユニットは、前記筐体の開口側が互いに対向するように配置されていることを特徴とする。
　このように配置する理由は、筐体の底部を相手方に向けて配置すると、磁界の結合係数が低下するからである。 A non-contact power feeding system according to an embodiment of the present invention includes the above-described coil unit mounted on a vehicle and the above-described coil unit installed near the ground, and the coil unit on the vehicle side and the ground The coil units on the side are arranged such that the opening sides of the casing face each other.
The reason for arranging in this way is that when the bottom of the case is arranged facing the other, the coupling coefficient of the magnetic field decreases.
　以下、添付図面を参照して、本発明の好適な実施形態について詳細に説明する。なお、説明において、同一要素又は同一機能を有する要素には、同一符号を用いることとし、重複する説明は省略する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same elements or elements having the same function will be denoted by the same reference symbols, without redundant description.
　まず、図１を参照して、本実施形態に係る非接触給電システムの構成を説明する。図１は、本実施形態に係る非接触給電システムを示す構成図である。 First, the configuration of the non-contact power feeding system according to the present embodiment will be described with reference to FIG. FIG. 1: is a block diagram which shows the non-contact electric power feeding system which concerns on this embodiment.
　非接触給電システムは、車両１と給電装置１１とを備えている。車両１は、コイルユニットＣＵ１と、整流器３と、蓄電器５と、を有している。車両１の構成は、モータにより駆動される車両であれば、図１に示される構成に限らない。たとえば、モータと内燃機関とを備えるプラグインハイブリッド車両などを含む。 The noncontact power feeding system includes a vehicle 1 and a power feeding device 11. The vehicle 1 includes a coil unit CU <b> 1, a rectifier 3, and a capacitor 5. The configuration of the vehicle 1 is not limited to the configuration shown in FIG. 1 as long as the vehicle is driven by a motor. For example, it includes a plug-in hybrid vehicle including a motor and an internal combustion engine.
　コイルユニットＣＵ１は、整流器３を介して蓄電器５に接続されている。コイルユニットＣＵ１は、コイルＬ１と、コイルＬ１に電気的に接続されたコンデンサＣ１（共振コンデンサ）と、を備えている。本実施形態では、コンデンサＣ１は、コイルＬ１に直列に接続されている。コンデンサＣ１は、コイルＬ１に並列に接続されていてもよい。 The coil unit CU1 is connected to the storage battery 5 via the rectifier 3. The coil unit CU1 includes a coil L1 and a capacitor C1 (resonance capacitor) electrically connected to the coil L1. In the present embodiment, the capacitor C1 is connected in series to the coil L1. The capacitor C1 may be connected in parallel to the coil L1.
　給電装置１１は、電源１３と、インバータ部１５と、コイルユニットＣＵ２と、を有している。コイルユニットＣＵ２は、インバータ部１５を介して電源１３に接続されている。コイルユニットＣＵ２は、コイルＬ２と、コイルＬ２に電気的に接続されたコンデンサＣ２（共振コンデンサ）と、を備えている。本実施形態では、コンデンサＣ２は、コイルＬ２に直列に接続されている。コンデンサＣ２は、コイルＬ２に並列に接続されていてもよい。 The power supply device 11 includes a power supply 13, an inverter unit 15, and a coil unit CU2. The coil unit CU2 is connected to the power supply 13 via the inverter unit 15. The coil unit CU2 includes a coil L2 and a capacitor C2 (resonance capacitor) electrically connected to the coil L2. In the present embodiment, the capacitor C2 is connected in series to the coil L2. The capacitor C2 may be connected in parallel to the coil L2.
　コイルユニットＣＵ１（コイルＬ１）は、電磁誘導によって、コイルユニットＣＵ２（コイルＬ２）から電力を非接触で受電する。整流器３は、コイルユニットＣＵ１によって取出された交流電力を整流し、整流された電力を蓄電器５へ出力する。
　蓄電器５は、再充電可能な直流電源であり、たとえばリチウムイオンやニッケル水素などの二次電池が含まれる。蓄電器５として大容量のキャパシタも採用可能である。コイルユニットＣＵ１は、たとえば車体下部に搭載される。 The coil unit CU1 (coil L1) receives power from the coil unit CU2 (coil L2) contactlessly by electromagnetic induction. The rectifier 3 rectifies the AC power extracted by the coil unit CU1 and outputs the rectified power to the capacitor 5.
The capacitor 5 is a rechargeable DC power source, and includes, for example, a secondary battery such as lithium ion or nickel hydrogen. A large capacity capacitor can also be adopted as the capacitor 5. Coil unit CU1 is mounted, for example, at the lower part of the vehicle body.
　電源１３は、車両外部の電源であり、たとえば商用電源である。インバータ部１５は、電源１３から受ける電力を所定周波数の電力に変換し、変換した所定周波数の電力をコイルユニットＣＵ２へ供給する。コイルユニットＣＵ２は、たとえば地面近傍に設置される。コイルユニットＣＵ２（コイルＬ２）は、電磁誘導によって、コイルユニットＣＵ１（コイルＬ１）へ電力を送電する。 The power source 13 is a power source external to the vehicle, and is, for example, a commercial power source. The inverter unit 15 converts the power received from the power supply 13 into power of a predetermined frequency, and supplies the converted power of the predetermined frequency to the coil unit CU2. Coil unit CU2 is installed, for example, near the ground. The coil unit CU2 (coil L2) transmits power to the coil unit CU1 (coil L1) by electromagnetic induction.
　次に、図２～４を参照して、コイルユニットＣＵ１，ＣＵ２の構成を説明する。
　図２及び図３は、コイルユニットを示す斜視図である。図４は、コイルユニットを示す分解斜視図である。図３及び図４では、後述する蓋体２３及び樹脂４５の図示が省略されている。本実施形態では、コイルユニットＣＵ１とコイルユニットＣＵ２とが同じ構造である。 Next, the configuration of the coil units CU1 and CU2 will be described with reference to FIGS.
2 and 3 are perspective views showing the coil unit. FIG. 4 is an exploded perspective view showing the coil unit. In FIG.3 and FIG.4, illustration of the lid 23 and resin 45 which are mentioned later is abbreviate | omitted. In the present embodiment, the coil unit CU1 and the coil unit CU2 have the same structure.
　コイルユニットＣＵ１，ＣＵ２は、上述したコイルＬ１，Ｌ２及びコンデンサＣ１，Ｃ２の他に、筐体２１と、蓋体２３と、を備えている。 The coil units CU1 and CU2 include a housing 21 and a lid 23 in addition to the coils L1 and L2 and the capacitors C1 and C2 described above.
　コイルＬ１，Ｌ２は、コア３１に巻回された導線３３により構成される。コア３１は、フェライトなどの磁性材料からなる。コア３１は、平板形状を呈している。導線３３には、たとえばリッツ線を用いることができる。コンデンサＣ１，Ｃ２は、複数のコンデンサ素子３５により構成される。複数のコンデンサ素子３５は、基板３７に実装されている。 The coils L <b> 1 and L <b> 2 are configured by the conducting wire 33 wound around the core 31. The core 31 is made of a magnetic material such as ferrite. The core 31 has a flat plate shape. For the lead 33, for example, a litz wire can be used. The capacitors C1 and C2 are formed of a plurality of capacitor elements 35. The plurality of capacitor elements 35 are mounted on the substrate 37.
　筐体２１は、コイルＬ１，Ｌ２とコンデンサＣ１，Ｃ２とが収納される非磁性材料からなる部材であり、平面視で矩形形状を呈しており、一方に開口を有する有底箱状の部材である。本実施形態では、筐体２１は、アルミニウムからなる。筐体２１がアルミニウムからなることにより、漏れ磁束を遮蔽して、結合係数を高めることができると共に、軽量化を図りつつ強度を確保することができる。 The housing 21 is a member made of a nonmagnetic material in which the coils L1 and L2 and the capacitors C1 and C2 are accommodated, and has a rectangular shape in a plan view, and is a boxed member with an opening at one end. is there. In the present embodiment, the housing 21 is made of aluminum. Since the casing 21 is made of aluminum, the leakage magnetic flux can be shielded to increase the coupling coefficient, and the strength can be secured while achieving weight reduction.
　筐体２１は、底部２１ａと、側壁部２１ｂと、仕切壁部２１ｃと、を有している。底部２１ａは、矩形形状を呈しており、側壁部２１ｂは、底部２１ａの各辺から底部２１ａに直交する方向に延びている。仕切壁部２１ｃは、対向する２つの側壁部２１ｂにわたるように、底部２１ａに直交する方向に底部２１ａから延びている。これにより、筐体２１の内部空間は、第一収納空間Ｓ１と第二収納空間Ｓ２とに画される。 The housing 21 has a bottom 21a, a side wall 21b, and a partition 21c. The bottom 21a has a rectangular shape, and the side wall 21b extends in a direction perpendicular to the bottom 21a from each side of the bottom 21a. The partition wall 21c extends from the bottom 21a in a direction perpendicular to the bottom 21a so as to extend across the two opposing side walls 21b. Thereby, the internal space of the housing 21 is divided into the first storage space S1 and the second storage space S2.
　第一収納空間Ｓ１には、コイルＬ１，Ｌ２が収納される。コイルＬ１，Ｌ２は、底部２１ａの第一収納空間Ｓ１に面する領域に配置された載置部２５と、載置部２５に着脱可能に取り付けられる押え部４３とにより、固定されている。具体的には、コア３１の端部が載置部２５と押え部４３とで挟持されることにより、筐体２１に固定される。 The coils L1 and L2 are stored in the first storage space S1. The coils L1 and L2 are fixed by the placement portion 25 disposed in the area facing the first storage space S1 of the bottom portion 21a and the pressing portion 43 removably attached to the placement portion 25. Specifically, the end portion of the core 31 is fixed to the housing 21 by being held between the mounting portion 25 and the pressing portion 43.
　第一収納空間Ｓ１には、第一収納空間Ｓ１に収納されたコイルＬ１，Ｌ２を覆うように、樹脂４５が充填されている。樹脂４５としては、たとえば、エポキシ樹脂などを用いることができる。樹脂４５は、第一収納空間Ｓ１にコイルＬ１，Ｌ２を収納した後に、硬化前の樹脂４５を第一収納空間Ｓ１に注入し、その後硬化することにより得られる。 The first storage space S1 is filled with a resin 45 so as to cover the coils L1 and L2 stored in the first storage space S1. For example, an epoxy resin can be used as the resin 45. The resin 45 is obtained by storing the coils L1 and L2 in the first storage space S1, injecting the resin 45 before curing into the first storage space S1, and then curing the resin 45.
　第二収納空間Ｓ２には、コンデンサＣ１，Ｃ２（複数のコンデンサ素子３５）が収納される。コンデンサＣ１，Ｃ２は、複数のコンデンサ素子３５が実装された基板３７を底部２１ａの第二収納空間Ｓ２に面する領域に対して取り付けることにより、第二収納空間Ｓ２に収納される。筐体２１の開口のうち第二収納空間Ｓ２に対応する領域が、蓋体２３により閉塞される。蓋体２３は、底部２１ａの第二収納空間Ｓ２に面する領域と対向し、筐体２１に着脱可能に取り付けられる。蓋体２３の材料は、非磁性体であれば特に限られないが、筐体２１の剛性を高めるためには、金属製（たとえば、アルミニウム製）であることが好ましい。 The capacitors C1 and C2 (a plurality of capacitor elements 35) are accommodated in the second accommodation space S2. The capacitors C1 and C2 are stored in the second storage space S2 by attaching the substrate 37 on which the plurality of capacitor elements 35 are mounted to a region of the bottom 21a facing the second storage space S2. The region corresponding to the second storage space S2 in the opening of the housing 21 is closed by the lid 23. The lid 23 faces the area facing the second storage space S2 of the bottom 21a, and is detachably attached to the housing 21. The material of the lid 23 is not particularly limited as long as it is a nonmagnetic material, but in order to enhance the rigidity of the housing 21, it is preferable to be made of metal (for example, made of aluminum).
　筐体２１の一の側面（側壁部２１ｂ）には、コイルＬ１，Ｌ２及びコンデンサＣ１，Ｃ２に電気的に接続される複数の配線Ｗ１，Ｗ２の取出し部４７が設けられている。配線Ｗ１は、コイルＬ１，Ｌ２（リッツ線）の一端に接続されている。配線Ｗ２は、基板３７の端子電極（不図示）に接続されており、これによりコンデンサＣ１，Ｃ２（複数のコンデンサ素子３５）と電気的に接続されることとなる。コイルＬ１，Ｌ２（リッツ線）の他端は、基板３７に配置された端子電極（不図示）に接続されており、これによりコンデンサＣ１，Ｃ２と直列に接続されることとなる。 On one side surface (side wall 21b) of the housing 21, there are provided extraction portions 47 of a plurality of wires W1 and W2 electrically connected to the coils L1 and L2 and the capacitors C1 and C2. The wiring W1 is connected to one end of the coils L1 and L2 (Ritz wire). The wiring W2 is connected to a terminal electrode (not shown) of the substrate 37, and thereby electrically connected to the capacitors C1 and C2 (a plurality of capacitor elements 35). The other ends of the coils L1 and L2 (litz wire) are connected to a terminal electrode (not shown) disposed on the substrate 37, and thereby connected in series to the capacitors C1 and C2.
　コイルユニットＣＵ１とコイルユニットＣＵ２とは、筐体２１の開口側が互いに対向するように配置される。すなわち、コイルユニットＣＵ１は、筐体２１の開口側が下方に向くように車両１に搭載され、コイルユニットＣＵ２は、筐体２１の開口側が上方に向くように地面近傍に設置される。 The coil unit CU1 and the coil unit CU2 are arranged such that the opening sides of the housing 21 face each other. That is, coil unit CU1 is mounted on vehicle 1 so that the opening side of case 21 faces downward, and coil unit CU2 is installed near the ground so that the opening side of case 21 faces upward.
　以上のように、本実施形態では、筐体２１は、第一収納空間Ｓ１と第二収納空間Ｓ２とを画するための仕切壁部２１ｃを有することとなるため、剛性が高くなり、コイルユニットＣＵ１，ＣＵ２の強度が向上する。第二収納空間Ｓ２が蓋体２３により閉じられるため、コンデンサＣ１，Ｃ２を保護することかでき、第一収納空間Ｓ１に樹脂４５が充填されるため、コイルＬ１，Ｌ２を保護することができる。 As described above, in the present embodiment, since the case 21 includes the partition wall 21c for defining the first storage space S1 and the second storage space S2, the rigidity is increased, and the coil unit is increased. The strength of CU1 and CU2 is improved. Since the second storage space S2 is closed by the lid 23, the capacitors C1 and C2 can be protected, and since the first storage space S1 is filled with the resin 45, the coils L1 and L2 can be protected.
　本実施形態では、筐体２１に蓋体２３が取り付けられること、及び、第一収納空間Ｓ１に樹脂４５が充填されることによっても、筐体２１の剛性が高まり、コイルユニットＣＵ１，ＣＵ２の強度がより一層向上する。 In the present embodiment, the rigidity of the case 21 is enhanced also by the attachment of the lid 23 to the case 21 and the filling of the first storage space S1 with the resin 45, and the strength of the coil units CU1 and CU2 Improve further.
　本実施形態では、第一収納空間Ｓ１に樹脂４５が充填されていることにより、コイルＬ１，Ｌ２の電気絶縁性を確保することができる。 In the present embodiment, by filling the first storage space S1 with the resin 45, the electrical insulation of the coils L1 and L2 can be secured.
　本実施形態では、筐体２１の一の側面には、コイルＬ１，Ｌ２及びコンデンサＣ１，Ｃ２に電気的に接続される複数の配線Ｗ１，Ｗ２の取出し部４７が設けられている。これにより、コイルユニットＣＵ１，ＣＵ２への配線Ｗ１，Ｗ２の接続を簡易に行うことができ、各種装置への搭載を容易に行うことができる。 In the present embodiment, at one side surface of the housing 21, the extraction portions 47 of the plurality of wires W1 and W2 electrically connected to the coils L1 and L2 and the capacitors C1 and C2 are provided. As a result, connection of the wires W1 and W2 to the coil units CU1 and CU2 can be easily performed, and mounting on various devices can be easily performed.
　続いて、図５及び図６を参照して、コイルユニットＣＵ１，ＣＵ２の変形例の構成を説明する。図５及び図６は、コイルユニットの変形例を示す斜視図である。図６では、蓋体２３及び樹脂４５の図示が省略されている。 Subsequently, configurations of modified examples of the coil units CU1 and CU2 will be described with reference to FIGS. 5 and 6. FIG.5 and FIG.6 is a perspective view which shows the modification of a coil unit. In FIG. 6, the lid 23 and the resin 45 are not shown.
　図５及び図６に示された変形例では、筐体２１は、内部空間が複数の仕切壁部２１ｃにより一つの第一収納空間Ｓ１と複数の第二収納空間Ｓ２とに画されている。本変形例では、筐体２１の内部空間が二つ仕切壁部２１ｃにより一つの第一収納空間Ｓ１と二つの第二収納空間Ｓ２とに画されている。第一収納空間Ｓ１は、二つの第二収納空間Ｓ２の間に位置している。 In the modification shown in FIG. 5 and FIG. 6, the housing 21 is divided into a first storage space S1 and a plurality of second storage spaces S2 by the plurality of partition walls 21c. In this modification, the internal space of the housing 21 is divided into one first storage space S1 and two second storage spaces S2 by two partition walls 21c. The first storage space S1 is located between the two second storage spaces S2.
　本変形例では、筐体２１が複数の仕切壁部２１ｃ（二つの仕切壁部２１ｃ）を有している。このため、筐体２１の剛性がより一層高くなり、コイルユニットＣＵ１，ＣＵ２の強度が更に向上する。 In the present modification, the housing 21 has a plurality of partition walls 21c (two partition walls 21c). Therefore, the rigidity of the housing 21 is further enhanced, and the strength of the coil units CU1 and CU2 is further improved.
　本変形例では、第一収納空間Ｓ１が二つの第二収納空間Ｓ２の間に位置しているため、第一収納空間Ｓ１、すなわちコイルＬ１，Ｌ２が、コイルユニットＣＵ１，ＣＵ２の中央部分に位置することとなる。このため、コイルユニットＣＵ１，ＣＵ２の搭載位置などの設計自由度が向上する。 In this modification, since the first storage space S1 is located between the two second storage spaces S2, the first storage space S1, that is, the coils L1 and L2 are located at the central portions of the coil units CU1 and CU2. It will be done. As a result, the degree of freedom in designing the mounting positions of the coil units CU1 and CU2 is improved.
　以上、本発明の好適な実施形態について説明してきたが、本発明は必ずしも上述した実施形態に限定されるものではなく、その要旨を逸脱しない範囲で様々な変更が可能である。 Although the preferred embodiments of the present invention have been described above, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.
　上述した変形例では、筐体２１の内部空間が二つ仕切壁部２１ｃにより一つの第一収納空間Ｓ１と二つの第二収納空間Ｓ２とに画されているがこれに限られない。たとえば、筐体２１の内部空間が三つ以上の仕切壁部２１ｃにより一つの第一収納空間Ｓ１と三つ以上の第二収納空間Ｓ２とに画されていてもよい。 In the modification described above, the internal space of the housing 21 is divided into the first storage space S1 and the two second storage spaces S2 by the two partition walls 21c, but the invention is not limited thereto. For example, the internal space of the housing 21 may be divided into one first storage space S1 and three or more second storage spaces S2 by three or more partition walls 21c.
　上述した実施形態及びその変形例では、筐体２１の材料として、アルミニウムが用いられているが、これに限られない。たとえば、筐体２１の材料として樹脂（たとえば、炭素繊維などによる繊維強化プラスチック（ＦＲＰ）など）を用い、コイルＬ１，Ｌ２が収納される第一収納空間Ｓ１に面する領域を覆うように、アルミニウム箔や銅箔などの部材が貼付されていてもよい。 Although aluminum is used as a material of the housing 21 in the above-described embodiment and its modification, the present invention is not limited to this. For example, a resin (for example, a fiber reinforced plastic (FRP) made of carbon fiber or the like) is used as a material of the housing 21 to cover the area facing the first storage space S1 in which the coils L1 and L2 are stored. A member such as foil or copper foil may be attached.
　第一収納空間Ｓ１に充填された樹脂４５を覆うように、更に、樹脂製の蓋体を設けてもよい。この場合、筐体２１の剛性が更に高まり、コイルユニットＣＵ１，ＣＵ２の強度がより一層向上する。第一収納空間Ｓ１を金属製の蓋体で覆う場合、電力を伝送するための磁路に金属が挿入されることとなり、結合係数が低下してしまう。また、金属によっては、渦電流が生じ、蓋体が発熱する懼れがある。 A lid made of a resin may be further provided to cover the resin 45 filled in the first storage space S1. In this case, the rigidity of the housing 21 is further enhanced, and the strength of the coil units CU1 and CU2 is further improved. When the first storage space S1 is covered with a metal lid, metal is inserted into the magnetic path for transmitting power, and the coupling coefficient is reduced. In addition, depending on the metal, an eddy current may occur and the lid may generate heat.
　本実施形態では、車両に対する非接触給電システムを例に説明したが、本発明はこれに限られることなく、車両以外の移動体や、電気製品などにも適用できる。 Although the non-contact power feeding system for a vehicle has been described as an example in the present embodiment, the present invention is not limited to this, and can be applied to a mobile body other than a vehicle, an electric product, and the like.
　本発明は、非接触給電システムに利用できる。 The present invention is applicable to a noncontact power feeding system.
　２１…筐体、２１ｃ…仕切壁部、２３…蓋体、４５…樹脂、４７…取出し部、Ｃ１，Ｃ２…コンデンサ、ＣＵ１，ＣＵ２…コイルユニット、Ｌ１，Ｌ２…コイル、Ｓ１…第一収納空間、Ｓ２…第二収納空間、Ｗ１，Ｗ２…配線。 DESCRIPTION OF SYMBOLS 21 ... Housing | casing 21c ... Partition wall part 23: Lid body 45: Resin, 47 ... Extraction part, C1, C2 ... Capacitor, CU1, CU2 ... Coil unit, L1, L2 ... Coil, S1 ... 1st storage space , S2: second storage space, W1, W2: wiring.

Claims (7)

  1. 　電磁誘導によって、電力の送電及び受電の少なくともいずれか一方を行うコイルユニットであって、
    　コイルと、
    　前記コイルに電気的に接続されたコンデンサと、
    　非磁性材料からなり、一方に開口を有すると共に、その内部空間が仕切壁部により前記コイルが収納される第一収納空間と前記コンデンサが収納される第二収納空間とに画された筐体と、
    　前記開口のうち前記第二収納空間に対応する領域を閉塞する蓋体と、を備え、
    　前記第一収納空間には、前記第一収納空間に収納された前記コイルを覆うように、樹脂が充填され、前記樹脂が前記第一収納空間の内部で硬化していることを特徴とするコイルユニット。     A coil unit that performs at least one of power transmission and power reception by electromagnetic induction,
    With the coil,
    A capacitor electrically connected to the coil;
    A case made of a nonmagnetic material and having an opening at one side, and an internal space thereof being divided by a partition wall into a first storage space in which the coil is stored and a second storage space in which the capacitor is stored. ,
    And a lid for closing an area corresponding to the second storage space in the opening.
    The first storage space is filled with a resin so as to cover the coil stored in the first storage space, and the resin is cured inside the first storage space. unit.
  2. 　前記筐体は、前記内部空間が複数の前記仕切壁部により前記第一収納空間と複数の前記第二収納空間とに画されていることを特徴とする請求項１に記載のコイルユニット。 2. The coil unit according to claim 1, wherein the housing is divided into the first storage space and the plurality of second storage spaces by the plurality of partition walls.
  3. 　前記筐体は、
    　前記第一及び第二収納空間の底面を構成する底部と、
    　前記底部の各辺から立設された側壁部と、
    　対向する２つの側壁部にわたるように前記底部に立設され、前記側壁部と同じ高さの前記仕切壁部とを有することを特徴とする請求項１又は２に記載のコイルユニット。     The housing is
    A bottom portion constituting a bottom surface of the first and second storage spaces;
    Side walls standing from each side of the bottom;
    The coil unit according to claim 1 or 2, further comprising: the partition wall portion standing on the bottom portion so as to extend over two opposing side wall portions and having the same height as the side wall portion.
  4. 　前記筐体の前記側壁部には、前記コイル及び前記コンデンサに接続された配線の取出し部が設けられていることを特徴とする請求項３に記載のコイルユニット。 The coil unit according to claim 3, wherein the side wall portion of the housing is provided with an extraction portion of a wire connected to the coil and the capacitor.
  5. 　前記筐体は、アルミニウムを含む金属製の非磁性材料、または、前記第一収納空間に面する領域を金属泊で覆った樹脂製材料よりなることを特徴とする請求項１～４のいずれか１項に記載のコイルユニット。 The said housing | casing consists of metal nonmagnetic material containing aluminum, or resin material which covered the area | region which faces said 1st storage space with metal foil, The coil unit according to item 1.
  6. 　前記第一収納空間に充填された前記樹脂を覆うように、更に、樹脂製の蓋体が設けられていることを特徴とする請求項１～５のいずれか１項に記載のコイルユニット。 The coil unit according to any one of claims 1 to 5, further comprising a lid made of a resin so as to cover the resin filled in the first storage space.
  7. 　車両に搭載された請求項１～６のいずれか１項に記載のコイルユニットと、
    　地面近傍に設置された請求項１～６のいずれか１項に記載のコイルユニットと、を備えた非接触給電システムであって、
    　車両側の前記コイルユニットと地面側の前記コイルユニットは、前記筐体の開口側が互いに対向するように配置されていることを特徴とする非接触給電システム。     The coil unit according to any one of claims 1 to 6, mounted on a vehicle.
    A coil unit according to any one of claims 1 to 6 installed in the vicinity of the ground;
    The non-contact electric power feeding system characterized in that the coil unit on the vehicle side and the coil unit on the ground side are arranged such that the opening sides of the housing face each other.
PCT/JP2013/053046 2012-02-20 2013-02-08 Coil unit and contactless power supply system WO2013125372A1 (en)

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