JP6280698B2 - Feed coil unit - Google Patents

Feed coil unit Download PDF

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JP6280698B2
JP6280698B2 JP2013111696A JP2013111696A JP6280698B2 JP 6280698 B2 JP6280698 B2 JP 6280698B2 JP 2013111696 A JP2013111696 A JP 2013111696A JP 2013111696 A JP2013111696 A JP 2013111696A JP 6280698 B2 JP6280698 B2 JP 6280698B2
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case
cover
coil
wall
bottom plate
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JP2014232754A (en
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茂生 森
茂生 森
真之 片岡
真之 片岡
大樹 小松
大樹 小松
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Yazaki Corp
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Yazaki Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • 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
    • B60L53/30—Constructional details of charging stations
    • B60L53/34—Plug-like or socket-like devices specially adapted for contactless inductive charging of electric vehicles
    • 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
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • 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
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/10—Emission reduction
    • B60L2270/14—Emission reduction of noise
    • B60L2270/147—Emission reduction of noise electro magnetic [EMI]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M7/00—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
    • 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
    • Y02T90/12—Electric charging stations
    • 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)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Description

本発明は、給電コイルユニットに係り、例えば、電気自動車又はプラグインハイブリッド自動車（ＰＨＶ）等のような走行可能な車輌に搭載された電池の充電電力を供給する非接触式の給電コイルユニットに関する。   The present invention relates to a power supply coil unit, and more particularly to a non-contact type power supply coil unit that supplies charging power of a battery mounted on a travelable vehicle such as an electric vehicle or a plug-in hybrid vehicle (PHV).

一般に、地上に設置した充電装置のプラグを車輌のコネクタに接続して、車輌に搭載された電池を充電するようにしている。このようなプラグイン式に代えて、地上に設置した電源から非接触で車輌の充電装置に電力を供給する非接触給電装置が特許文献１に記載されている。これによれば、道路等に１次コイルを配設し、車輌の床面に２次コイルを配設し、それら１次と２次のコイルの電磁誘導によって地上に設けた電源から車輌に搭載した充電装置に電力を供給する非接触給電装置が提案されている。   Generally, a charging device plug installed on the ground is connected to a connector of a vehicle to charge a battery mounted on the vehicle. In place of such a plug-in type, Patent Document 1 discloses a non-contact power feeding device that supplies power to a vehicle charging device in a non-contact manner from a power source installed on the ground. According to this, a primary coil is disposed on a road or the like, a secondary coil is disposed on the floor of the vehicle, and the vehicle is mounted on a vehicle from a power source provided on the ground by electromagnetic induction of the primary and secondary coils. There has been proposed a non-contact power feeding device that supplies power to the charging device.

同文献に記載の非接触給電装置に用いられる１次コイルは、ベース部とカバー部からなる八角形の平板箱状に形成された容器内に、１次コイルである平板状のコイル体を収容して給電コイルユニットを構成し、給電コイルユニットを道路に設置又は埋設して車輌の２次コイルに非接触で給電するようにしている。このような非接触給電に用いられる給電コイルユニットは、誤って車輌が乗り上げることを考慮して、耐荷重性能を持たせる必要があるが、電磁誘導を妨げないようにするため、金属などの強度部材を用いることができない。   The primary coil used in the non-contact power feeding device described in the same document houses a flat coil body, which is a primary coil, in a container formed in an octagonal flat plate box shape including a base portion and a cover portion. Thus, a power feeding coil unit is configured, and the power feeding coil unit is installed or buried in a road so that power is supplied to the secondary coil of the vehicle in a non-contact manner. The power supply coil unit used for such non-contact power supply needs to have load-bearing performance in consideration of the vehicle getting on by mistake, but the strength of metal etc. is not to prevent electromagnetic induction. The member cannot be used.

そこで、同文献に記載の給電コイルユニットは、ベース部とカバー部をそれぞれレジンコンクリートにより形成し、ベース部とカバー部により形成された箱状のスペース内にコイル体を収容し、収容スペース内に形成されるすき間に詰め物を充填して、耐荷重性能を持たせる構造が提案されている。この充填材としては、発泡材、軽量化コンクリ材、アルミ材、低収縮性樹脂、等が例示されている。   Therefore, in the feeding coil unit described in the same document, the base part and the cover part are respectively formed of resin concrete, the coil body is accommodated in a box-shaped space formed by the base part and the cover part, There has been proposed a structure in which a filling material is filled with a gap between the formed gaps to provide load bearing performance. Examples of the filler include foamed materials, lightweight concrete materials, aluminum materials, and low shrinkage resins.

特開２０１２−８９６１８号公報JP 2012-89618 A

ところで、給電コイルユニットの1次コイルに流す電流の周波数を商用周波数よりも高くすることが望まれるが、広い範囲に強い磁界が発生するので、電磁波シールドを考慮しなければならない。しかしながら、特許文献1に記載の給電コイルユニットは、ベース部とカバー部を絶縁材であるレジンコンクリートで形成しているから、電磁波シールドについては考慮されていない。   By the way, although it is desirable to make the frequency of the current flowing through the primary coil of the power supply coil unit higher than the commercial frequency, a strong magnetic field is generated in a wide range, so an electromagnetic wave shield must be considered. However, in the power feeding coil unit described in Patent Document 1, since the base portion and the cover portion are formed of resin concrete that is an insulating material, electromagnetic wave shielding is not considered.

また、防水性を持たせるために、ベース部とカバー部で形成される空間に収容されるコイル等の部品のすき間に充填材を詰めているが、充填材の硬化時間、膨張、収縮を考慮して充填量を管理するとともに、均等に充填しなければならない。つまり、すき間が残っていると、防水性が低下するとともに、充填材の量が多すぎるとベース部とカバー部が膨張し、却って防水性が低下することが起こり得る。   In addition, in order to provide waterproofness, a filler is filled in a gap between parts such as a coil housed in a space formed by the base portion and the cover portion, but the curing time, expansion, and contraction of the filler are taken into consideration. Thus, the filling amount must be controlled and the filling must be performed uniformly. That is, if the gap remains, the waterproof property is lowered, and if the amount of the filler is too large, the base portion and the cover portion may expand and the waterproof property may be lowered.

本発明が解決しようとする課題は、漏磁界の強度を低減して電磁波による影響が外部に及ばない構造の給電コイルユニットを提供することにある。   The problem to be solved by the present invention is to provide a feed coil unit having a structure in which the influence of electromagnetic waves does not reach the outside by reducing the strength of the leakage magnetic field.

上記の課題を解決するため、本発明の給電コイルユニットは、上面が開口されたケースと、該ケースの開口を覆う樹脂製のカバーと、前記ケースと前記カバーにより形成される空間内に収容されたコイル体と、前記コイル体に接続されて外部に引き出された電源ケーブルとを備え、前記ケースは、金属材料で形成され、平板状の底板と、該底板の周縁部に起立して形成された環状の壁体とを有してなることを特徴とする。   In order to solve the above problems, a feeding coil unit of the present invention is accommodated in a case having an upper surface opened, a resin cover that covers the opening of the case, and a space formed by the case and the cover. And a power cable connected to the coil body and drawn to the outside, and the case is formed of a metal material, and is formed upright on a flat bottom plate and a peripheral portion of the bottom plate. And an annular wall body.

本発明によれば、給電コイルユニットを形成するケースを、金属材料で形成し、板状の底板と、該底板の周縁部に起立して形成された環状の壁体とを有してなる構造としたことを特徴とする。これにより、電磁波の発生源であるコイル体の上面を除いて、側面及び底面側が金属材料のケースで覆われることから、電磁波がケースの壁体及び底板で反射されて外部に漏れ出るのを抑制できる。   According to the present invention, the case forming the power feeding coil unit is formed of a metal material, and has a plate-like bottom plate and an annular wall formed upright on the peripheral edge of the bottom plate. It is characterized by that. As a result, the side and bottom surfaces are covered with a metal case except for the top surface of the coil body, which is the source of electromagnetic waves, so that electromagnetic waves are prevented from leaking to the outside by being reflected by the wall and bottom plate of the case. it can.

さらに、本発明において、前記ケースは、前記底板の周縁を前記壁体から張り出して形成されたフランジと、前記壁体の頂面の全周にわたってリングパッキンが装着されたパッキン溝とが形成され、前記カバーは、磁性を有しない樹脂により矩形状に形成され、平板状の天板の周縁に前記ケースの壁体の外周側に被せる覆い部が前記フランジ面まで垂下して形成されているものとすることができる。これによれば、ケースとカバーとの接合部の防水を、ケースの底面から壁体の高さ分だけ高い位置に設けたリングパッキンにより行うことができ、高圧洗浄等の際に、水が防水部に直接かからないから、防水構造の信頼性を向上することができる。   Furthermore, in the present invention, the case is formed with a flange formed by projecting a peripheral edge of the bottom plate from the wall body, and a packing groove in which a ring packing is mounted over the entire circumference of the top surface of the wall body, The cover is formed in a rectangular shape with a resin that does not have magnetism, and a cover portion that covers the outer peripheral side of the wall of the case is formed to hang down to the flange surface on the periphery of a flat top plate. can do. According to this, the waterproofing of the joint between the case and the cover can be performed by the ring packing provided at a position higher than the bottom surface of the case by the height of the wall body, and the water is waterproof at the time of high-pressure washing or the like. Since it is not directly applied to the part, the reliability of the waterproof structure can be improved.

本発明によれば、漏磁界の強度を低減して電磁波による影響が外部に及ばない構造の給電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 feeding coil unit having a structure in which the strength of a leakage magnetic field is reduced and the influence of electromagnetic waves does not reach the outside.

本発明の給電コイルユニットの一実施例の分解斜視図である。It is a disassembled perspective view of one Example of the feed coil unit of this invention. 図１の実施例の組立体の内部構成を示す断面図である。It is sectional drawing which shows the internal structure of the assembly of the Example of FIG. 図１の実施例の特徴部の要部断面図である。It is principal part sectional drawing of the characteristic part of the Example of FIG.

以下、本発明の給電コイルユニットの一実施例を説明する。本実施例は、例えば、電気自動車又はプラグインハイブリッド自動車（ＰＨＶ）等のような走行可能な車輌に搭載された電池に充電電力を供給する非接触式の給電コイルユニットに関する。車両に搭載された電池を充電する非接触式充電システムは、例えば、車庫あるいは駐車場に設置された充電電源に１次コイルである給電コイルユニットを接続し、給電コイルユニットに相互誘導可能な範囲内に車輌の床面に設けられた２次コイルを位置させ、それら１次コイル及び２次コイル間の相互誘導によって、地上の充電電源から車輌に搭載された電池を充電するように形成できる。この場合において、例えば、地上に設置した充電電源は、商用周波数の電圧をインバータにより変換して比較的高い周波数の電流（以下、高周波電流という。）を給電コイルユニットに供給し、車両側では２次コイルに誘導された高周波電流を整流器で整流して電池を充電する非接触式充電システムを構成することができる。   Hereinafter, an embodiment of the feeding coil unit of the present invention will be described. The present embodiment relates to a non-contact power supply coil unit that supplies charging power to a battery mounted on a vehicle that can travel, such as an electric vehicle or a plug-in hybrid vehicle (PHV). A non-contact charging system for charging a battery mounted on a vehicle is, for example, a range in which a feeding coil unit, which is a primary coil, is connected to a charging power source installed in a garage or a parking lot and can be mutually guided to the feeding coil unit. A secondary coil provided on the floor of the vehicle is positioned inside, and a battery mounted on the vehicle can be charged from a ground charging power source by mutual induction between the primary coil and the secondary coil. In this case, for example, a charging power source installed on the ground converts a commercial frequency voltage by an inverter and supplies a relatively high frequency current (hereinafter referred to as a high frequency current) to the feeding coil unit. A non-contact charging system that charges the battery by rectifying the high-frequency current induced in the secondary coil with a rectifier can be configured.

このような非接触式充電システムに用いられる給電コイルユニットは、図１及び図２に示すように、ケース１と、ケース１の上面開口を覆うカバー２と、ケース１とカバー２とで形成される空間に収容されるコイル体３とを備えて構成される。ケース１は、本実施例では常磁性体であるアルミニウムで形成され、平板状の底板１１の周縁部に起立して環状に形成された壁体１２と、底板１１の周縁を壁体１２の外側まで張り出して形成されたフランジ１３と、壁体１２に形成されたケーブル貫通孔１４と、ケーブル貫通孔１４から引き出される電源ケーブル４を支持固定するケーブル支持板５を備えて形成されている。また、壁体１２の頂部には、壁体１２に沿って環状のパッキン溝１１ａが形成され、パッキン溝１１ａには環状のＯリングパッキン１０が装着されるようになっている。   As shown in FIGS. 1 and 2, the power feeding coil unit used in such a non-contact charging system is formed of a case 1, a cover 2 that covers the upper surface opening of the case 1, and the case 1 and the cover 2. And a coil body 3 accommodated in a space. The case 1 is made of aluminum, which is a paramagnetic material in this embodiment, and has a wall body 12 that is formed in an annular shape standing on the peripheral edge of the flat bottom plate 11, and the peripheral edge of the bottom plate 11 is outside the wall body 12. And a cable support plate 5 for supporting and fixing the power cable 4 drawn from the cable through hole 14. An annular packing groove 11a is formed at the top of the wall body 12 along the wall body 12, and an annular O-ring packing 10 is attached to the packing groove 11a.

ケーブル支持板５及び底板１１の底面（内面）１１ａには、電源ケーブル４を固定するケーブル受け台１８と、ケーブル押え金具１９がそれぞれ設けられている。そして、ケーブル押え金具１９をケーブル受け台１８にネジ２０で固定して、電源ケーブル４を挟持して固定するようになっている。なお、ケーブル貫通孔１４と電源ケーブル４との隙間は、図示していないパッキン等により防水される。   On the bottom surface (inner surface) 11 a of the cable support plate 5 and the bottom plate 11, a cable cradle 18 for fixing the power cable 4 and a cable retainer 19 are provided. The cable retainer 19 is fixed to the cable cradle 18 with screws 20, and the power cable 4 is sandwiched and fixed. The gap between the cable through hole 14 and the power cable 4 is waterproofed by packing or the like not shown.

カバー２は、例えば、磁性を有しない樹脂により矩形状に形成され、平板状の天板２１の周縁にケース１の壁体１２の外周側に被せる覆い部２２が垂下して形成されている。また、天板２１には、ケース１のケーブル支持板５に合わせてケーブル４の引出し部を覆うケーブルカバー部２３が形成され、これに合わせて覆い部２２にケーブルカバー覆い部２２aが形成されている。また、カバー２の覆い部２２は、ケース１のフランジ１３の上面に接するように伸延して形成されている。そして、フランジ１３に適宜分散して設けられた貫通孔１６に対応する位置の覆い部２２に厚肉部２２ｂが形成され、厚肉部２２ｂに袋状のネジ孔２２ｃが穿設されている。そして、ケース１の壁体１２の外周側にカバー２を被せた状態で、ケース１の貫通孔１６からボルトなどの締結部材１６aを挿通して、ネジ孔２２ｃにネジ込むことによりカバー２をケース１に固定するようになっている。また、ケーブルカバー覆い部２２aに形成されたケーブル引出用の半円弧状の孔にリング状パッキン１０を圧入して、防水するようになっている。   The cover 2 is formed, for example, in a rectangular shape using a resin that does not have magnetism, and a cover 22 that covers the outer peripheral side of the wall 12 of the case 1 is suspended from the periphery of the flat top plate 21. The top plate 21 is formed with a cable cover portion 23 that covers the lead-out portion of the cable 4 in accordance with the cable support plate 5 of the case 1, and a cable cover cover portion 22 a is formed in the cover portion 22 in accordance with this. Yes. Further, the cover portion 22 of the cover 2 is formed so as to extend in contact with the upper surface of the flange 13 of the case 1. And the thick part 22b is formed in the cover part 22 of the position corresponding to the through-hole 16 provided in the flange 13 by disperse | distributing suitably, and the bag-like screw hole 22c is drilled in the thick part 22b. Then, with the cover 2 covered on the outer peripheral side of the wall body 12 of the case 1, the fastening member 16 a such as a bolt is inserted from the through hole 16 of the case 1 and screwed into the screw hole 22 c. It is fixed to 1. Further, the ring-shaped packing 10 is press-fitted into a semicircular arc-shaped hole formed in the cable cover covering portion 22a for waterproofing.

一方、コイル体３は、図１及び図２に示すように、磁性体からなる平板状のコア３１を絶縁部材３２で挟み込んで形成した平板状のボビン３３を有して形成されている。そして、ボビン３３の中央部の外周の一定範囲にコイル導体３４を巻回して形成されている。なお、ボビン３３の表面にはコイル導体３４を装着する溝３３ａが複数形成されている。コイル導体３４が巻回されていないボビン３３の両側縁部に、複数の貫通孔３３ｂが穿設されている。この貫通孔３３ｂに対応させて、ケース１の底板１１の底面（内面）１１ａに形成された台座１７の上面にネジ孔１７ａが形成されている。そして、ボビン３３の貫通孔３３ｂから図示していないボルトを台座１７のネジ孔１７aにねじ込んで、コイル体３をケース１に固定するようになっている。また、コイル体３の図１において左奥側に形成されるスペースに制御ユニット６が配置され、コイル体３と制御ユニット６の上に透明な樹脂フィルム７が配置されている。   On the other hand, as shown in FIGS. 1 and 2, the coil body 3 is formed with a flat bobbin 33 formed by sandwiching a flat core 31 made of a magnetic material with an insulating member 32. The coil conductor 34 is wound around a predetermined range on the outer periphery of the central portion of the bobbin 33. A plurality of grooves 33 a for mounting the coil conductors 34 are formed on the surface of the bobbin 33. A plurality of through holes 33b are formed in both side edges of the bobbin 33 around which the coil conductor 34 is not wound. A screw hole 17 a is formed on the upper surface of the base 17 formed on the bottom surface (inner surface) 11 a of the bottom plate 11 of the case 1 so as to correspond to the through hole 33 b. Then, a bolt (not shown) is screwed into the screw hole 17 a of the pedestal 17 from the through hole 33 b of the bobbin 33, and the coil body 3 is fixed to the case 1. Further, the control unit 6 is disposed in a space formed on the left back side of the coil body 3 in FIG. 1, and a transparent resin film 7 is disposed on the coil body 3 and the control unit 6.

一方、コイル体３の下面とケース１の底面１１ａとの間のすき間に、複数の矩形の穴８ａを格子状に配列して形成した樹脂製のバッファプレート８が挿入されるようになっている。バッファプレート８は、例えば、高い靭性を有するＰＣ系の樹脂により形成することが好ましい。そして、バッファプレート８の肉厚は、台座１７の高さに応じた厚みにすることが好ましい。つまり、本実施例では、コイル体３を固定するケース１の台座１７は、ネジ受け長さ（袋ネジ）を確保するために、台座１７の厚みが必要となり、台座１７の上面が底面１１よりも高い位置になる。そのため、台座１７の上面にコイル体３のボビン３３の側縁部を固定すると、コイル体３の下面とケース１の底面１１ａとの間にすき間が形成されてしまう。このようなすき間があると、カバー２の上面に荷重が加わったとき、カバー２及びコイル体３が撓んで変形する。このような変形を繰り返し受けると、カバー２及びコイル体３が損傷を受けるおそれがある。そこで、本実施例では、少なくともコイル体３とケース１の底面１１ａとの間に形成されるすき間に、複数の穴８ａが形成された樹脂製のバッファプレート８が挟み込みこまれている。これにより、バッファプレート８によって、コイル体３とケース１との間のすき間がなくなるから、車輌が給電コイルユニットに乗り上げてカバー２に集中的な荷重が加わっても、カバー２及びコイル体３などの構成部品の撓みを抑制して、損傷を防止することができる。また、車輌が乗り上げた際の荷重が特定の部品に集中することなく、カバー２、コイル体３、バッファープレート８及びケース１に分散されるから、構成部品の損傷を防止することができる。また、内部の構成部品の配置に応じて、バッファプレート８の格子状の穴８ａの連結部８ｂを切断することにより、所要の形状に合わせることができる。   On the other hand, a resin buffer plate 8 formed by arranging a plurality of rectangular holes 8a in a lattice pattern is inserted between the lower surface of the coil body 3 and the bottom surface 11a of the case 1. . The buffer plate 8 is preferably formed of, for example, a PC-based resin having high toughness. The thickness of the buffer plate 8 is preferably set to a thickness corresponding to the height of the pedestal 17. That is, in this embodiment, the pedestal 17 of the case 1 to which the coil body 3 is fixed requires the thickness of the pedestal 17 in order to secure the screw receiving length (bag screw), and the upper surface of the pedestal 17 is higher than the bottom surface 11. Will be higher. Therefore, when the side edge portion of the bobbin 33 of the coil body 3 is fixed to the upper surface of the pedestal 17, a gap is formed between the lower surface of the coil body 3 and the bottom surface 11 a of the case 1. If there is such a gap, when a load is applied to the upper surface of the cover 2, the cover 2 and the coil body 3 are bent and deformed. If such deformation is repeatedly received, the cover 2 and the coil body 3 may be damaged. Therefore, in this embodiment, a resin buffer plate 8 in which a plurality of holes 8 a are formed is sandwiched between at least gaps formed between the coil body 3 and the bottom surface 11 a of the case 1. As a result, the gap between the coil body 3 and the case 1 is eliminated by the buffer plate 8, so that even if the vehicle rides on the power feeding coil unit and a concentrated load is applied to the cover 2, the cover 2, the coil body 3, etc. It is possible to prevent the component parts from being bent and prevent damage. Further, since the load when the vehicle rides on is distributed to the cover 2, the coil body 3, the buffer plate 8, and the case 1 without concentrating on specific parts, damage to the components can be prevented. Moreover, according to arrangement | positioning of an internal component, it can match | combine with a required shape by cut | disconnecting the connection part 8b of the grid | lattice-like hole 8a of the buffer plate 8. FIG.

ここで、図１に分解斜視図で示した給電コイルユニットの組み立てについて説明する。組み立てられた給電コイルユニットは、図２の断面図に示す構造になる。まず、ケース１にバッファプレート８を組み付ける。バッファプレート８は、ケース１の図において右手前の壁体１２に沿って、台座１７の内側に挿入する。次いで、コイル体３をバッファプレート８の上面に載置するとともに、ボビン３３の両側縁を台座１７の上面に載置して、図示していないボルトを貫通孔３３ｂに挿入し、台座１７のネジ孔１７ａにねじ込んで、コイル体３をケース１に固定する。次に、コイル体３のコイル導体３４に接続され、かつ電源ケーブル４に接続された制御ユニット６を、コイル体３に並べてケース１の図において左奥側に収容する。なお、電源ケーブル４は、ケース１の壁体１２に形成されたケーブル貫通孔１４からケース１内に挿入して制御ユニット６に接続し、さらに制御ユニット６とコイル導体３４を接続しておく。また、電源ケーブル４は、ケーブル受け台１８に載置し、ケーブル押え金具１９をネジ２０でケーブル受け台１８に固定しておく。そして、コイル体３と制御ユニット６の上面に樹脂フィルム７を載置してカバー２を被せる。   Here, the assembly of the feeding coil unit shown in the exploded perspective view in FIG. 1 will be described. The assembled feeding coil unit has a structure shown in the sectional view of FIG. First, the buffer plate 8 is assembled to the case 1. The buffer plate 8 is inserted inside the pedestal 17 along the wall 12 on the right front side in the drawing of the case 1. Next, the coil body 3 is placed on the upper surface of the buffer plate 8, both side edges of the bobbin 33 are placed on the upper surface of the pedestal 17, bolts (not shown) are inserted into the through holes 33 b, The coil body 3 is fixed to the case 1 by screwing into the hole 17a. Next, the control unit 6 connected to the coil conductor 34 of the coil body 3 and connected to the power cable 4 is arranged in the coil body 3 and accommodated on the left back side in the figure of the case 1. The power cable 4 is inserted into the case 1 through the cable through hole 14 formed in the wall 12 of the case 1 and connected to the control unit 6, and the control unit 6 and the coil conductor 34 are further connected. The power cable 4 is placed on the cable cradle 18, and the cable retainer 19 is fixed to the cable cradle 18 with screws 20. And the resin film 7 is mounted on the upper surface of the coil body 3 and the control unit 6, and the cover 2 is covered.

すなわち、カバー２の覆い部２２をケース１の壁体１２の外周に被せるとともに、ケーブルカバー覆い部２２ａの位置をケーブル支持板５に合わせて、ケース１に被せる。そして、ケース１のフランジ１３の貫通穴１６から、図３に示すように、ボルト１６ａを、カバー２の覆い部２２に穿設されたネジ孔２２ｃにねじ込んで固定する。このとき、ケース１の壁体１２の頂面に形成されたパッキン溝１２ａに環状の例えばＯリングパッキン９を装着する。これにより、ケース１とカバー２により閉塞された空間に外部から水が浸入するのを防止することができる。   In other words, the cover 22 of the cover 2 is placed on the outer periphery of the wall 12 of the case 1, and the position of the cable cover cover 22 a is aligned with the cable support plate 5 and is put on the case 1. Then, from the through hole 16 of the flange 13 of the case 1, as shown in FIG. 3, the bolt 16 a is screwed into a screw hole 22 c formed in the cover portion 22 of the cover 2 and fixed. At this time, an annular O-ring packing 9 is mounted in the packing groove 12 a formed on the top surface of the wall 12 of the case 1. Thereby, it is possible to prevent water from entering the space closed by the case 1 and the cover 2 from the outside.

以上述べたように、本実施例によれば、給電コイルユニットを形成するケース１を、金属材料で形成し、板状の底板１１と、底板１１の周縁部に起立して形成された環状の壁体１２とを有してなる構造としたことを特徴とする。これにより、電磁波の発生源であるコイル体３の上面を除いて、側面及び底面側が金属材料のケース１で覆われることから、電磁波がケース１の壁体１２及び底板１１で反射されて外部に漏れ出るのを抑制して、電磁シールドすることができる。   As described above, according to the present embodiment, the case 1 that forms the feeding coil unit is formed of a metal material, and the ring-shaped bottom plate 11 and the annular plate formed by standing up at the peripheral edge of the bottom plate 11 are formed. It is characterized by having a structure including a wall body 12. As a result, the side surface and the bottom surface side are covered with the metal material case 1 except for the upper surface of the coil body 3 which is an electromagnetic wave generation source. Therefore, the electromagnetic waves are reflected by the wall body 12 and the bottom plate 11 of the case 1 and are exposed to the outside. The leakage can be suppressed and electromagnetic shielding can be performed.

また、本実施例によれば、ケース１の底板１１の周縁を壁体１２から張り出してフランジ１３を形成し、壁体１２の頂面の全周にわたって形成したパッキン溝１２ａにＯリングパッキン９を装着し、ケース２の覆い部２２がフランジ１３の上面まで伸延して形成されていることを特徴とする。これにより、覆い部２２が壁体１２の外周の全部を覆い、かつ図３の要部断面図に示すように、ケース１の底面１１aから壁体１２の高さ分だけ高い位置に設けたＯリングパッキン９により防水する構造であるから、ケース１とカバー２の接合部に形成される水の浸入経路４０を長くすることができる。その結果、高圧洗浄等の際に、水が防水部に直接かからないから、防水構造の信頼性を向上することができる。   Further, according to this embodiment, the peripheral edge of the bottom plate 11 of the case 1 is projected from the wall body 12 to form the flange 13, and the O-ring packing 9 is provided in the packing groove 12 a formed over the entire circumference of the top surface of the wall body 12. The cover 22 of the case 2 is formed so as to extend to the upper surface of the flange 13. As a result, the cover 22 covers the entire outer periphery of the wall 12, and the O provided at a position higher by the height of the wall 12 than the bottom surface 11 a of the case 1 as shown in the cross-sectional view of the main part of FIG. 3. Since the structure is waterproofed by the ring packing 9, the water intrusion path 40 formed at the joint between the case 1 and the cover 2 can be lengthened. As a result, since water is not directly applied to the waterproof part during high-pressure cleaning or the like, the reliability of the waterproof structure can be improved.

以上、本発明を実施例に基づいて説明したが、本発明はこれらに限定されるものではなく、本発明の主旨の範囲で変形又は変更された形態で実施することが可能であることは、当業者にあっては明白なことであり、そのような変形又は変更された形態が本願の特許請求の範囲に属することは当然のことである。   As described above, the present invention has been described based on the embodiments, but the present invention is not limited thereto, and can be implemented in a form that is modified or changed within the scope of the gist of the present invention. It will be apparent to those skilled in the art that such variations or modifications are within the scope of the claims.

上記の実施例では、ケース１をアルミニウム材で形成したが、他の金属材料で形成しても、本発明の効果を得ることができる。   In the above embodiment, the case 1 is formed of an aluminum material. However, the effects of the present invention can be obtained even if the case 1 is formed of another metal material.

１ ケース
２ カバー
３ コイル体
４ 電源ケーブル
６ 制御ユニット
７ 樹脂フィルム
８ バッファプレート
９ Ｏリングパッキン
１１ 底板
１２ 壁体
１３ フランジ
１６ 貫通孔
１７ 台座
２１ 天板
２２ 覆い部
３１ コア
３２ 絶縁部材
３３ ボビン
３４ コイル導体
DESCRIPTION OF SYMBOLS 1 Case 2 Cover 3 Coil body 4 Power cable 6 Control unit 7 Resin film 8 Buffer plate 9 O-ring packing 11 Bottom plate 12 Wall body 13 Flange 16 Through-hole 17 Base 21 Top plate 22 Cover part 31 Core 32 Insulation member 33 Bobbin 34 Coil conductor

Claims (1)

上面が開口されたケースと、該ケースの開口を覆う樹脂製のカバーと、前記ケースと前記カバーにより形成される空間内に収容されたコイル体と、前記コイル体に接続されて外部に引き出された電源ケーブルとを備え、前記ケースは、金属材料で形成され、平板状の底板と、該底板の周縁部に起立して形成された環状の壁体とを有し、
前記ケースは、前記底板の周縁を前記壁体から張り出して形成されたフランジと、前記壁体の頂面の全周にわたってリングパッキンが装着されたパッキン溝とを有して形成され、
前記カバーは、磁性を有しない樹脂により形成された平板状の天板部と、該天板部の周縁に前記ケースの壁体の外周側に被せる覆い部とを有してなり、該覆い部は前記フランジの上面まで垂下して形成されてなる給電コイルユニット。 A case having an upper surface opened, a resin cover covering the opening of the case, a coil body housed in a space formed by the case and the cover, and connected to the coil body and pulled out to the outside with the a power cable, wherein the casing is formed of a metal material, possess a flat bottom plate, and a wall of the annular formed by standing on the periphery of the bottom plate,
The case is formed to include a flange formed by projecting a peripheral edge of the bottom plate from the wall body, and a packing groove in which a ring packing is mounted over the entire circumference of the top surface of the wall body,
The cover includes a flat plate-shaped top plate portion formed of a resin having no magnetism, and a cover portion that covers the outer peripheral side of the wall of the case on the periphery of the top plate portion. feeding electric coil unit comprising formed by hanging to the upper surface of the flange.
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