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 unit
coil
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
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
Priority to JP2012-033594 priority Critical
Priority to JP2012033594A priority patent/JP5293851B2/en
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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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12Inductive energy transfer
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/02Casings
    • H01F27/022Encapsulation
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14Inductive couplings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/022Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter
    • H02J7/025Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter using non-contact coupling, e.g. inductive, capacitive
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7005Batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/12Electric charging stations
    • Y02T90/122Electric charging stations by inductive energy transmission
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/14Plug-in electric vehicles

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

Coil unit and noncontact power feeding system

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.

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.

Shigeru Abe, Hiroyoshi Kaneko, "Non-contact power feeding technology", Journal of the Institute of Electrical Engineers of Japan, 2008, 128, 12, p. 796-799

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.

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.

According to the present invention, it is possible to provide a coil unit capable of securing strength while unitizing a coil and a capacitor.

It is a block diagram showing the non-contact electric supply system concerning this embodiment. It is a perspective view showing a coil unit. It is a perspective view showing a coil unit. It is an exploded perspective view showing a coil unit. It is a perspective view which shows the modification of a coil unit. It is a perspective view which shows the modification of a coil unit.

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.

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.

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.

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".

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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. 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.

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.

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. 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.

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.

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).

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The present invention is applicable to a noncontact power feeding system.

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. 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. 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. 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. 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. 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. 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. 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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JP2012-033594 2012-02-20
JP2012033594A JP5293851B2 (en) 2012-02-20 2012-02-20 Coil unit and non-contact power supply system

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WO2015122249A1 (en) * 2014-02-14 2015-08-20 矢崎総業株式会社 Coil unit and power supply system
WO2015122248A1 (en) * 2014-02-14 2015-08-20 矢崎総業株式会社 Power receiving unit and power supply system provided therewith
WO2015124502A1 (en) * 2014-02-19 2015-08-27 Bayerische Motoren Werke Aktiengesellschaft Arrangement of an induction coil on an underbody of a motor vehicle, and method for inductively charging an energy accumulator of a motor vehicle
WO2015189977A1 (en) * 2014-06-13 2015-12-17 株式会社 東芝 Inductor for wireless power transmission
EP2960910A1 (en) * 2014-06-11 2015-12-30 Toyota Jidosha Kabushiki Kaisha Power transmission device and power receiving device
WO2016027570A1 (en) * 2014-08-20 2016-02-25 トヨタ自動車株式会社 Power transmission device and method for producing same, and power reception device and method for producing same
DE102015014032A1 (en) 2015-10-30 2016-06-16 Daimler Ag Secondary transformer unit for a motor vehicle
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