JP5293851B2 - Coil unit and non-contact power supply system - Google Patents

Coil unit and non-contact power supply system Download PDF

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Publication number
JP5293851B2
JP5293851B2 JP2012033594A JP2012033594A JP5293851B2 JP 5293851 B2 JP5293851 B2 JP 5293851B2 JP 2012033594 A JP2012033594 A JP 2012033594A JP 2012033594 A JP2012033594 A JP 2012033594A JP 5293851 B2 JP5293851 B2 JP 5293851B2
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coil unit
storage space
coil
resin
unit according
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JP2013172503A (en
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未規 小泉
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Priority to PCT/JP2013/053046 priority patent/WO2013125372A1/en
Priority to JP2013122826A priority patent/JP2013192450A/en
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    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Description

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.

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 in a non-contact power transmission / reception system using electromagnetic induction, a coil unit including a coil and a capacitor electrically connected to the coil is known (for example, see Non-Patent Document 1). Since a relatively large gap exists between the coil on the power transmission side and the coil on the power reception side, the coupling coefficient is low, the leakage inductance is increased, and the power supply efficiency is lowered. Therefore, a resonance circuit is configured by connecting a capacitor to the coil, and the power supply efficiency is improved by this resonance circuit.

阿部茂、金子裕良、「非接触給電技術」、電気学会誌、２００８年、１２８巻、１２号、ｐ．７９６−７９９Shigeru Abe and Hiroyoshi Kaneko, “Non-contact power feeding technology”, Journal of the Institute of Electrical Engineers of Japan, 2008, 128, 12, p. 796-799

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, the coil unit needs strength to protect the coil and the capacitor.

本発明は、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 this invention is to provide the coil unit which can ensure intensity | strength.

本発明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、樹脂が充填されている。   The coil unit according to the present invention is a coil unit that performs at least one of power transmission and power reception by electromagnetic induction, and is composed of a coil, a capacitor electrically connected to the coil, and a nonmagnetic material, A housing having an opening on one side and an internal space defined between a first storage space in which the coil is stored by the partition wall and a second storage space in which the capacitor is stored, and a second storage space in the opening A lid that closes the region corresponding to the first storage space, and the first storage space is filled with resin so as to cover the coil stored in the first storage space.

本発明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。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、第一収納空間に樹脂が充填されることにより、コイルを保護することができる。   In the coil unit according to the present invention, since the housing has the partition wall portion, the rigidity is increased and the strength of the coil unit is improved. The capacitor can be protected by closing the second storage space with the lid, and the coil can be protected by filling the resin in the first storage space.

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 the case, the internal space may be divided into a first storage space and a plurality of second storage spaces by a plurality of partition walls. In this case, due to the plurality of partition walls, the rigidity of the casing is further increased, and the strength of the coil unit is further improved.

本発明によれば、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。   ADVANTAGE OF THE INVENTION According to this invention, the coil unit which can ensure intensity | strength can be provided.

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 lineblock 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 which shows a coil unit. コイルユニットを示す斜視図である。It is a perspective view which shows a coil unit. コイルユニットを示す分解斜視図である。It is a disassembled perspective view which shows 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.

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 reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

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, with reference to FIG. 1, the structure of the non-contact electric power feeding system which concerns on this embodiment is demonstrated. FIG. 1 is a configuration diagram illustrating a contactless power feeding system according to the present 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 non-contact power feeding system includes a vehicle 1 and a power feeding device 11. The vehicle 1 includes a coil unit CU1, 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, a plug-in hybrid vehicle including a motor and an internal combustion engine is included.

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 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 with 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 feeding device 11 includes a power source 13, an inverter unit 15, and a coil unit CU2. The coil unit CU <b> 2 is connected to the power source 13 through 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 with 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 electric power from the coil unit CU2 (coil L2) in a non-contact manner by electromagnetic induction. The rectifier 3 rectifies the AC power extracted by the coil unit CU <b> 1 and outputs the rectified power to the battery 5. The battery 5 is a rechargeable DC power supply, and includes, for example, a secondary battery such as lithium ion or nickel metal hydride. A large-capacity capacitor can also be used as the battery 5. The 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 outside the vehicle, for example, a commercial power source. The inverter unit 15 converts the power received from the power source 13 into power having a predetermined frequency, and supplies the converted power having the predetermined frequency to the coil unit CU2. The coil unit CU2 is installed near the ground, for example. The coil unit CU2 (coil L2) transmits electric 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. 3 and 4, the lid 23 and the resin 45 described later are not shown. 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 casing 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 L1 and L2 are constituted by a 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 example, a litz wire can be used as the conductive wire 33. Capacitors C <b> 1 and C <b> 2 are composed 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 casing 21 is a member made of a non-magnetic material in which the coils L1 and L2 and the capacitors C1 and C2 are housed. The casing 21 is a bottomed box-like member having a rectangular shape in plan view and having an opening on one side. 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 reducing the weight.

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 | casing 21 has the bottom part 21a, the side wall part 21b, and the partition wall part 21c. The bottom 21a has a rectangular shape, and the side wall 21b extends from each side of the bottom 21a in a direction orthogonal to the bottom 21a. The partition wall portion 21c extends from the bottom portion 21a in a direction perpendicular to the bottom portion 21a so as to extend over the two opposing side wall portions 21b. Thereby, the internal space of the housing | casing 21 is demarcated by 1st storage space S1 and 2nd 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 a placement portion 25 disposed in a region facing the first storage space S1 of the bottom portion 21a and a pressing portion 43 that is detachably attached to the placement portion 25. Specifically, the end portion of the core 31 is fixed to the housing 21 by being sandwiched between the placement 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. As the resin 45, for example, an epoxy resin can be used. 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.

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。   In the second storage space S2, capacitors C1 and C2 (a plurality of capacitor elements 35) are stored. 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 the region facing the second storage space S2 of the bottom 21a. A region corresponding to the second storage space S <b> 2 in the opening of the housing 21 is closed by the lid body 23. The lid body 23 is opposed to the region facing the second storage space S2 of the bottom portion 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 non-magnetic material, but is preferably made of metal (for example, aluminum) in order to increase the rigidity of the housing 21.

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 portion 21 b) of the housing 21, extraction portions 47 for a plurality of wirings W1 and W2 that are electrically connected to the coils L1 and L2 and the capacitors C1 and C2 are provided. The wiring W1 is connected to one end of the coils L1 and L2 (Litz wire). The wiring W2 is connected to a terminal electrode (not shown) of the substrate 37, thereby being electrically connected to the capacitors C1 and C2 (a plurality of capacitor elements 35). The other ends of the coils L1 and L2 (Litz wires) are connected to terminal electrodes (not shown) arranged on the substrate 37, thereby being connected in series with 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 so that the opening sides of the housing 21 face each other. That is, the coil unit CU1 is mounted on the vehicle 1 so that the opening side of the casing 21 faces downward, and the coil unit CU2 is installed near the ground so that the opening side of the casing 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, the casing 21 has the partition wall portion 21c for defining the first storage space S1 and the second storage space S2, so that the rigidity becomes high and the coil unit. 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. 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 casing 21 is increased by attaching the lid body 23 to the casing 21 and filling the first storage space S1 with the resin 45, and the strength of the coil units CU1 and CU2. Is further improved.

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 this embodiment, the electrical insulation of the coils L1 and L2 can be ensured by filling the first storage space S1 with the resin 45.

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, one side surface of the housing 21 is provided with an extraction portion 47 for a plurality of wirings W1 and W2 that are electrically connected to the coils L1 and L2 and the capacitors C1 and C2. As a result, the wirings W1 and W2 can be easily connected to the coil units CU1 and CU2, and can be easily mounted on various devices.

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, a configuration of a modified example of the coil units CU1 and CU2 will be described with reference to FIGS. 5 and 6 are perspective views showing modifications of the 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 FIGS. 5 and 6, the housing 21 is divided into a first storage space S <b> 1 and a plurality of second storage spaces S <b> 2 by the plurality of partition walls 21 c. In this modification, the internal space of the housing 21 is defined by one partition space 21c into one first storage space S1 and two second storage spaces S2. 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 this modification, the housing 21 has a plurality of partition wall portions 21c (two partition wall portions 21c). For this reason, the rigidity of the housing | casing 21 becomes still higher and the intensity | strength of coil unit CU1, CU2 further improves.

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 the present 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 positioned at the central portion of the coil units CU1 and CU2. Will be. For this reason, the freedom degree of design, such as the mounting position of coil unit CU1, CU2, improves.

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。   The preferred embodiments of the present invention have been described above. However, 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 modified example described above, the internal space of the housing 21 is defined as one first storage space S1 and two second storage spaces S2 by the two partition walls 21c, but is not limited thereto. For example, the internal space of the housing 21 may be defined as 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。   In the above-described embodiment and its modifications, aluminum is used as the material of the housing 21, but the present invention is not limited to this. For example, resin (for example, fiber reinforced plastic (FRP) made of carbon fiber or the like) is used as the material of the casing 21, and aluminum is covered so as to cover a region facing the first storage space S1 in which the coils L1 and L2 are stored. Members such as foil and 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 resin lid may be further provided so as to cover the resin 45 filled in the first storage space S1. In this case, the rigidity of the casing 21 is further increased, 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. Further, depending on the metal, an eddy current may be generated and the lid body 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。   In the present embodiment, the contactless power supply system for the vehicle has been described as an example. However, the present invention is not limited to this, and can be applied to a moving body other than the 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 can be used for a non-contact power supply 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。   21 ... Case, 21c ... Partition wall, 23 ... Cover, 45 ... Resin, 47 ... Extraction part, C1, C2 ... Capacitor, CU1, CU2 ... Coil unit, L1, L2 ... Coil, S1 ... First storage space , S2 ... second storage space, W1, W2 ... wiring.

Claims (7)

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,
Coils,
A capacitor electrically connected to the coil;
A housing made of a non-magnetic material, having an opening on one side, and having an internal space defined as a first storage space in which the coil is stored by a partition wall and a second storage space in which the capacitor is stored ,
A lid that closes a region of the opening corresponding to the second storage space;
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. 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 casing has the internal space defined by the first storage space and the plurality of second storage spaces by a plurality of partition walls. 前記筐体は、The housing is
前記第一及び第二収納空間の底面を構成する底部と、A bottom portion constituting the bottom surfaces of the first and second storage spaces;
前記底部の各辺から立設された側壁部と、A side wall erected from each side of the bottom,
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。3. The coil unit according to claim 1, wherein the coil unit has the partition wall portion that is erected on the bottom portion so as to extend over two opposing side wall portions and has the same height as the side wall portion. 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。4. The coil unit according to claim 3, wherein an extraction portion of a wiring connected to the coil and the capacitor is provided on the side wall portion of the casing. 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 the metal nonmagnetic material containing aluminum, or the resin material which covered the area | region which faces the said 1st storage space with the metal stay. The coil unit according to item 1. 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 claim 1, further comprising a resin lid so as to cover the resin filled in the first storage space. 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、The coil unit according to any one of claims 1 to 6, which is mounted on a vehicle,
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、A coil unit according to any one of claims 1 to 6 installed near the ground, and a non-contact power feeding system comprising:
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 non-contact power feeding system, wherein the coil unit on the vehicle side and the coil unit on the ground side are arranged so that the opening sides of the housing face each other.
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