JP5244946B2 - Power supply device - Google Patents

Power supply device Download PDF

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Publication number
JP5244946B2
JP5244946B2 JP2011158681A JP2011158681A JP5244946B2 JP 5244946 B2 JP5244946 B2 JP 5244946B2 JP 2011158681 A JP2011158681 A JP 2011158681A JP 2011158681 A JP2011158681 A JP 2011158681A JP 5244946 B2 JP5244946 B2 JP 5244946B2
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Prior art keywords
unit
power
power supply
power feeding
light
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JP2013027116A (en
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剛 西尾
修 大橋
則明 朝岡
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Priority to JP2011158681A priority Critical patent/JP5244946B2/en
Priority to PCT/JP2012/004613 priority patent/WO2013011695A1/en
Publication of JP2013027116A publication Critical patent/JP2013027116A/en
Priority to JP2013079503A priority patent/JP2013176286A/en
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    • 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
    • B60M7/003—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway for vehicles using stored power (e.g. charging stations)
    • 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
    • B60L53/10—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
    • B60L53/124—Detection or removal of foreign bodies
    • 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
    • B60L53/126—Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
    • 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
    • B60L53/35—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
    • B60L53/36—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles by positioning the vehicle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • 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
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • 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
    • 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
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/12—Speed
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/60—Navigation input
    • B60L2240/62—Vehicle position
    • 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
    • B60L2250/00—Driver interactions
    • B60L2250/16—Driver interactions by display
    • 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
    • H02J50/10—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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Abstract

This power supply apparatus is capable of detecting a foreign material on a power supply surface irrespective of whether charging is being performed or not, and is also capable of detecting even a small foreign material. A power supply apparatus (100) supplies power to a power receiving unit (157) that is provided in a vehicle (150). A power supply unit (101) has a power supply surface (101a) that faces the power receiving unit (157) in a non-contact state at the time of supplying power to the power receiving unit (157). A light guide unit (102) guides, from the power supply surface (101a), light that irradiates the power supply surface (101a). A foreign material detecting unit (103) detects a foreign material on the power supply surface (101a) by detecting tone of the light guided by means of the light guide unit (102).

Description

本発明は、車輌に設けられた受電部に対して給電する給電装置に関する。   The present invention relates to a power feeding device that feeds power to a power receiving unit provided in a vehicle.

従来、マイクロ波を用いて車輌に搭載された蓄電池を充電するエネルギー供給技術が知られている。このエネルギー供給技術では、マイクロ波電源から電力がマグネトロンに供給され、マグネトロンによりマイクロ波が生成される。各マグネトロンから発生したマイクロ波は、各送電アンテナを介して車輌の底面に配置されている受電アンテナへ送られる。受電アンテナにて受信されたマイクロ波は、電力に変換されるとともに整流され、直流電力に変換された後に、蓄電池へ供給される。   Conventionally, an energy supply technique for charging a storage battery mounted on a vehicle using a microwave is known. In this energy supply technology, electric power is supplied from a microwave power source to a magnetron, and a microwave is generated by the magnetron. Microwaves generated from each magnetron are sent to a power receiving antenna disposed on the bottom surface of the vehicle via each power transmitting antenna. Microwaves received by the power receiving antenna are converted into electric power, rectified, converted into DC power, and then supplied to the storage battery.

一方、このようなエネルギー供給技術では、マイクロ波の送電側と受電側との間に障害物が介在した場合、この障害物によりマイクロ波の伝送効率が低下し、更に、障害物が人または動物等の生き物である場合、マイクロ波による影響を受けるという課題がある。   On the other hand, in such an energy supply technology, when an obstacle is interposed between the microwave transmission side and the power reception side, the obstacle reduces the transmission efficiency of the microwave. In the case of creatures such as, there is a problem of being affected by microwaves.

このような課題を解決する方法として、送電アンテナと受電アンテナとの間の障害物の有無を検出し、障害物がないことが確認されてからマイクロ波の送電を開始するものが知られている（例えば、特許文献１）。   As a method for solving such a problem, there is known a method for detecting the presence or absence of an obstacle between a power transmitting antenna and a power receiving antenna and starting microwave transmission after confirming that there is no obstacle. (For example, patent document 1).

特許文献１には、送電アンテナと受電アンテナとの間の障害物を検知する方法として、種々の方法が記載されている。具体的には、赤外線センサ等の障害物検知装置による検知結果に基づいて障害物を検知する方法（以下、「従来方法１」と記載）が記載されている。また、カメラで撮影した送電アンテナ部分の画像データに基づいて障害物を検知する方法（以下、「従来方法２」と記載）が記載されている。さらに、送電アンテナから送出されたマイクロ波の反射波の受電レベルに基づいて障害物を検知する方法（以下、「従来方法３」と記載）が記載されている。   Patent Document 1 describes various methods as a method of detecting an obstacle between a power transmission antenna and a power reception antenna. Specifically, a method of detecting an obstacle based on a detection result by an obstacle detection device such as an infrared sensor (hereinafter referred to as “conventional method 1”) is described. In addition, a method for detecting an obstacle based on image data of a power transmission antenna portion taken by a camera (hereinafter referred to as “conventional method 2”) is described. Further, a method for detecting an obstacle based on the power reception level of the reflected wave of the microwave transmitted from the power transmission antenna (hereinafter referred to as “conventional method 3”) is described.

特開２００７−２６７５７８号公報JP 2007-267578 A

しかしながら、特許文献１においては、従来方法１の場合、小さい障害物は赤外線センサにより検知できないという問題がある。また、従来方法２の場合、小さい障害物は画像データを解析しても判別できないという問題がある。また、従来方法３の場合、小さい障害物の場合は反射波の受電レベルが小さくなり検知できないという問題がある。   However, in patent document 1, in the case of the conventional method 1, there exists a problem that a small obstruction cannot be detected with an infrared sensor. Further, in the case of the conventional method 2, there is a problem that a small obstacle cannot be determined even by analyzing image data. Further, in the case of the conventional method 3, there is a problem that in the case of a small obstacle, the received power level of the reflected wave becomes small and cannot be detected.

本発明の目的は、小さい異物であっても検出することができる給電装置を提供することである。   An object of the present invention is to provide a power feeding device that can detect even a small foreign object.

本発明の給電装置は、車輌に設けられた受電部に対して給電する給電装置であって、前記受電部に給電する際に非接触状態で前記受電部と対向する給電面を有する給電部と、前記給電面に照射された光を前記給電面から導光する導光部と、前記導光部により導光した光の明暗を検出することにより、前記給電面に存在する異物を検出する検出部と、電磁誘導方式、磁気共鳴方式、またはマイクロ波方式により前記受電部に誘導電流を発生させる給電コイルと、を備え、前記導光部は、前記給電部において前記給電面に沿って移動可能であり、前記検出部は、前記導光部が移動しながら前記給電面から導光した光の明暗を検出する構成を採る。 The power supply device of the present invention is a power supply device that supplies power to a power reception unit provided in a vehicle, and has a power supply surface that faces the power reception unit in a non-contact state when power is supplied to the power reception unit; Detecting foreign matter present on the power supply surface by detecting a light guide that guides the light applied to the power supply surface from the power supply surface, and brightness and darkness of the light guided by the light guide unit And a power supply coil that generates an induced current in the power receiving unit by an electromagnetic induction method, a magnetic resonance method, or a microwave method, and the light guide unit is movable along the power supply surface in the power supply unit The detecting unit adopts a configuration for detecting light and darkness of light guided from the power feeding surface while the light guiding unit moves .

本発明によれば、給電装置の給電面を照射する光を導光し、導光した光の明暗を検出することにより、小さい異物であっても検出することができる。   According to the present invention, even a small foreign object can be detected by guiding light that irradiates the power feeding surface of the power feeding device and detecting the brightness of the guided light.

本発明の実施の形態１における充電システムの構成を示すブロック図The block diagram which shows the structure of the charging system in Embodiment 1 of this invention. 本発明の実施の形態１に係る給電装置の動作を示すフロー図The flowchart which shows operation | movement of the electric power feeder which concerns on Embodiment 1 of this invention. 本発明の実施の形態１における異物の検出方法を示す図The figure which shows the detection method of the foreign material in Embodiment 1 of this invention. 本発明の実施の形態１における給電部の平面図The top view of the electric power feeding part in Embodiment 1 of this invention 本発明の実施の形態２における給電部の底面図The bottom view of the electric power feeding part in Embodiment 2 of this invention 本発明の実施の形態２における異物の検出方法を示す図The figure which shows the detection method of the foreign material in Embodiment 2 of this invention.

以下、本発明の実施の形態について、図面を参照して詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

（実施の形態１）
＜充電システムの構成＞
図１は、本発明の実施の形態１における充電システム１０の構成を示すブロック図である。 (Embodiment 1)
<Configuration of charging system>
FIG. 1 is a block diagram showing a configuration of charging system 10 according to Embodiment 1 of the present invention.

充電システム１０は、給電装置１００、車輌１５０、蓄電池１５８及び充電装置１７０を有する。   The charging system 10 includes a power feeding device 100, a vehicle 150, a storage battery 158, and a charging device 170.

給電装置１００は、給電部１０１が地表ｇから露出するように地面上に設置もしくは埋設される。給電装置１００は、例えば駐車スペース等に設けられ、車輌１５０の駐車中に充電装置１７０に対して給電する。なお、給電装置１００の構成の詳細については後述する。   The power supply apparatus 100 is installed or embedded on the ground such that the power supply unit 101 is exposed from the ground surface g. The power supply device 100 is provided in, for example, a parking space and supplies power to the charging device 170 while the vehicle 150 is parked. Details of the configuration of the power supply apparatus 100 will be described later.

車輌１５０は、蓄電池１５８及び充電装置１７０を有し、蓄電池１５８を動力源として走行する。車輌１５０は、例えば電気自動車である。   The vehicle 150 includes a storage battery 158 and a charging device 170, and travels using the storage battery 158 as a power source. The vehicle 150 is, for example, an electric vehicle.

蓄電池１５８は、充電装置１７０により供給される電力を蓄える。   Storage battery 158 stores the power supplied by charging device 170.

充電装置１７０は、給電装置１００から給電される電力を蓄電池１５８に供給する。なお、充電装置１７０の構成の詳細については後述する。   Charging device 170 supplies power supplied from power supply device 100 to storage battery 158. The details of the configuration of the charging device 170 will be described later.

＜給電装置の構成＞
給電装置１００は、給電部１０１と、導光部１０２と、異物検出部１０３と、給電側制御部１０４と、給電側通信部１０５とを有する。 <Configuration of power supply device>
The power supply apparatus 100 includes a power supply unit 101, a light guide unit 102, a foreign object detection unit 103, a power supply side control unit 104, and a power supply side communication unit 105.

給電部１０１は、受電部１５７に給電する際に非接触状態で受電部１５７と対向し、給電部１０１の筐体の一部となる給電面１０１ａを有する。給電面１０１ａは、磁界により加熱されない部材で形成される。給電部１０１は、受電部１５７と対向する後述の給電コイルを用いた電磁誘導により、受電部１５７に給電する。給電面１０１ａは、投光部１５６から発する光により照射される。   The power supply unit 101 has a power supply surface 101 a that faces the power reception unit 157 in a non-contact state when supplying power to the power reception unit 157 and serves as a part of the casing of the power supply unit 101. The power supply surface 101a is formed of a member that is not heated by a magnetic field. The power feeding unit 101 feeds power to the power receiving unit 157 by electromagnetic induction using a power feeding coil, which will be described later, facing the power receiving unit 157. The power feeding surface 101 a is irradiated with light emitted from the light projecting unit 156.

導光部１０２は、給電面１０１ａを照射する光を異物検出部１０３まで導光する。導光部１０２は、磁界により加熱されない部材で形成されており、例えば複数の光ファイバーケーブルにより構成される。なお、導光部１０２の構成の詳細については後述する。   The light guide unit 102 guides the light that irradiates the power supply surface 101 a to the foreign object detection unit 103. The light guide unit 102 is formed of a member that is not heated by a magnetic field, and includes, for example, a plurality of optical fiber cables. Details of the configuration of the light guide unit 102 will be described later.

異物検出部１０３は、給電側制御部１０４の制御に従って、導光部１０２により導光された光の明暗を検出し、検出結果に基づいて給電面１０１ａに存在する異物を検出し、検出結果を給電側制御部１０４に出力する。具体的には、異物検出部１０３は、導光部１０２により導光された光の光量が閾値以下の場合に異物を検出する。ここで、異物は、例えば硬貨または金属片等である。   The foreign object detection unit 103 detects the brightness and darkness of the light guided by the light guide unit 102 according to the control of the power supply side control unit 104, detects the foreign object existing on the power supply surface 101a based on the detection result, and detects the detection result. Output to the power supply side control unit 104. Specifically, the foreign object detection unit 103 detects a foreign object when the amount of light guided by the light guide unit 102 is equal to or less than a threshold value. Here, the foreign material is, for example, a coin or a metal piece.

給電側制御部１０４は、給電側通信部１０５から入力した給電開始信号に従って、給電部１０１に対して給電を開始するよう制御するとともに、異物検出部１０３に対して異物の検出を開始するように制御する。給電側制御部１０４は、給電側通信部１０５から入力した給電停止信号に従って、給電部１０１に対して給電を停止するように制御するとともに、異物検出部１０３に対して異物の検出を停止するように制御する。給電側制御部１０４は、異物検出部１０３から異物を検出した旨の検出結果が入力した場合に、給電部１０１に対して給電を停止するように制御する。   The power supply side control unit 104 controls the power supply unit 101 to start power supply in accordance with the power supply start signal input from the power supply side communication unit 105, and starts to detect the foreign material to the foreign material detection unit 103. Control. The power supply side control unit 104 controls the power supply unit 101 to stop power supply in accordance with the power supply stop signal input from the power supply side communication unit 105 and stops the foreign object detection unit 103 from detecting foreign objects. To control. The power supply side control unit 104 controls the power supply unit 101 to stop power supply when a detection result indicating that a foreign object has been detected is input from the foreign object detection unit 103.

給電側通信部１０５は、車輌側通信部１５５からの給電開始信号または給電停止信号を受信する。給電側通信部１０５は、受信した給電開始信号または給電停止信号を給電側制御部１０４に出力する。   The power supply side communication unit 105 receives a power supply start signal or a power supply stop signal from the vehicle side communication unit 155. The power supply side communication unit 105 outputs the received power supply start signal or power supply stop signal to the power supply side control unit 104.

＜充電装置の構成＞
充電装置１７０は、車速センサ１５１と、シフトポジションセンサ１５２と、車輌側制御部１５３と、表示部１５４と、車輌側通信部１５５と、投光部１５６と、受電部１５７とを有する。 <Configuration of charging device>
The charging device 170 includes a vehicle speed sensor 151, a shift position sensor 152, a vehicle side control unit 153, a display unit 154, a vehicle side communication unit 155, a light projecting unit 156, and a power receiving unit 157.

車速センサ１５１は、車輌１５０の車速を検出し、検出結果を車輌側制御部１５３に出力する。   The vehicle speed sensor 151 detects the vehicle speed of the vehicle 150 and outputs the detection result to the vehicle-side control unit 153.

シフトポジションセンサ１５２は、車輌１５０のシフトレバーの位置を検出し、検出結果を車輌側制御部１５３に出力する。シフトポジションセンサ１５２は、シフトレバーの位置として、例えば車輌１５０の駐車状態を示すパーキング「Ｐ」または車輌１５０の後退を示すバック「Ｒ」等を検出する。   The shift position sensor 152 detects the position of the shift lever of the vehicle 150 and outputs the detection result to the vehicle side control unit 153. The shift position sensor 152 detects, for example, parking “P” indicating the parking state of the vehicle 150 or back “R” indicating backward movement of the vehicle 150 as the position of the shift lever.

車輌側制御部１５３は、車速センサ１５１から入力した検出結果、またはシフトポジションセンサ１５２から入力した検出結果に基づいて、表示部１５４の表示を制御する。具体的には、車輌側制御部１５３は、車速またはシフトレバーの位置等を表示部１５４に表示させる制御を行う。   The vehicle-side control unit 153 controls the display of the display unit 154 based on the detection result input from the vehicle speed sensor 151 or the detection result input from the shift position sensor 152. Specifically, the vehicle-side control unit 153 performs control to display the vehicle speed or the position of the shift lever on the display unit 154.

車輌側制御部１５３は、表示部１５４から充電開始指示が入力した場合に、車輌側通信部１５５、投光部１５６及び受電部１５７に対して、充電に伴う各種処理を開始するように制御する。車輌側制御部１５３は、表示部１５４から充電停止指示が入力した場合に、車輌側通信部１５５、投光部１５６及び受電部１５７に対して、充電停止に伴う各種処理を開始するように制御する。   When the charging start instruction is input from the display unit 154, the vehicle-side control unit 153 controls the vehicle-side communication unit 155, the light projecting unit 156, and the power receiving unit 157 to start various processes associated with charging. . The vehicle-side control unit 153 controls the vehicle-side communication unit 155, the light projecting unit 156, and the power receiving unit 157 to start various processes associated with the charge stop when a charge stop instruction is input from the display unit 154. To do.

表示部１５４は、車輌側制御部１５３の制御に従って、車速またはシフトレバーの位置等を表示する。表示部１５４は、充電開始または充電停止のユーザからの指示を受け付けるメニュ画面を表示する。表示部１５４は、メニュ画面において充電開始または充電停止の指示をユーザから受けた際に、ユーザの指示に応じて充電開始指示または充電停止指示を車輌側制御部１５３に出力する。   The display unit 154 displays the vehicle speed, the position of the shift lever, and the like according to the control of the vehicle side control unit 153. Display unit 154 displays a menu screen that accepts an instruction from a user to start or stop charging. When receiving a charge start or charge stop instruction from the user on the menu screen, the display unit 154 outputs a charge start instruction or a charge stop instruction to the vehicle-side control unit 153 according to the user instruction.

車輌側通信部１５５は、車輌側制御部１５３の制御に従って、充電開始信号または充電停止信号を生成し、生成した充電開始信号または充電停止信号を給電側通信部１０５に送信する。   The vehicle side communication unit 155 generates a charge start signal or a charge stop signal according to the control of the vehicle side control unit 153, and transmits the generated charge start signal or charge stop signal to the power supply side communication unit 105.

投光部１５６は、車輌１５０の底面に設けられる光源であり、車輌側制御部１５３の制御に従って、給電面１０１ａの全面を所定時間連続して照射する。投光部１５６は、車輌側制御部１５３が充電開始信号を出力した後に給電面１０１ａの照射を開始する。   The light projecting unit 156 is a light source provided on the bottom surface of the vehicle 150, and irradiates the entire power supply surface 101a continuously for a predetermined time in accordance with the control of the vehicle side control unit 153. The light projecting unit 156 starts irradiating the power feeding surface 101a after the vehicle-side control unit 153 outputs a charging start signal.

受電部１５７は、車輌１５０の底面に設けられ、蓄電池１５８を充電する際に、給電部１０１の給電面１０１ａと非接触状態で対向する。受電部１５７は、車輌側制御部１５３の制御に従って、給電部１０１から給電された電力を蓄電池１５８に供給する。   The power reception unit 157 is provided on the bottom surface of the vehicle 150 and faces the power supply surface 101a of the power supply unit 101 in a non-contact state when charging the storage battery 158. The power receiving unit 157 supplies the power supplied from the power supply unit 101 to the storage battery 158 according to the control of the vehicle side control unit 153.

＜給電装置の動作＞
図２は、給電装置１００の動作を示すフロー図である。 <Operation of power supply device>
FIG. 2 is a flowchart showing the operation of the power supply apparatus 100.

まず、給電側通信部１０５は、給電開始信号を受信したか否かを判定する（ステップＳＴ２０１）。   First, the power supply side communication unit 105 determines whether or not a power supply start signal has been received (step ST201).

給電開始信号を受信していない場合（ステップＳＴ２０１：ＮＯ）には、給電装置１００は、給電しない。   When the power supply start signal is not received (step ST201: NO), the power supply apparatus 100 does not supply power.

一方、給電開始信号を受信した場合（ステップＳＴ２０１：ＹＥＳ）には、異物検出部１０３は、異物の検出を開始する（ステップＳＴ２０２）。   On the other hand, when the power supply start signal is received (step ST201: YES), the foreign object detection unit 103 starts detecting the foreign object (step ST202).

次に、異物検出部１０３は、異物を検出したか否かを判定する（ステップＳＴ２０３）。   Next, foreign object detection section 103 determines whether or not a foreign object has been detected (step ST203).

異物を検出しない場合（ステップＳＴ２０３：ＮＯ）には、給電側制御部１０４は、給電部１０１に対して給電を開始するように制御する（ステップＳＴ２０４）。   When no foreign matter is detected (step ST203: NO), the power supply side control unit 104 controls the power supply unit 101 to start power supply (step ST204).

また、異物検出部１０３は、給電中においても異物を検出したか否かを判定する（ステップＳＴ２０５）。   In addition, foreign object detection section 103 determines whether or not a foreign object has been detected even during power feeding (step ST205).

異物を検出しない場合（ステップＳＴ２０５：ＮＯ）には、給電側制御部１０４は、給電を終了するか否かを判定する（ステップＳＴ２０６）。   If no foreign object is detected (step ST205: NO), the power supply side control unit 104 determines whether or not to end the power supply (step ST206).

給電を終了しない場合（ステップＳＴ２０６：ＮＯ）には、給電側制御部１０４は、ステップＳＴ２０５及びステップＳＴ２０６の処理を繰り返す。   When the power feeding is not terminated (step ST206: NO), the power feeding side control unit 104 repeats the processes of step ST205 and step ST206.

一方、ステップＳＴ２０３またはステップＳＴ２０５において、異物を検出した場合（ステップＳＴ２０３：ＹＥＳまたはステップＳＴ２０５：ＹＥＳ）には、給電側制御部１０４は給電部１０１に対して給電を停止するように制御し（ステップＳＴ２０７）、異物検出部１０３は異物の検出を停止する（ステップＳＴ２０８）。   On the other hand, when a foreign object is detected in step ST203 or step ST205 (step ST203: YES or step ST205: YES), the power feeding side control unit 104 controls the power feeding unit 101 to stop power feeding (step (ST207), the foreign object detection unit 103 stops detecting the foreign object (step ST208).

また、ステップＳＴ２０６において、給電を終了する場合（ステップＳＴ２０６：ＹＥＳ）には、給電側制御部１０４は、給電部１０１に対して給電を停止するように制御し（ステップＳＴ２０７）、異物検出部１０３は異物の検出を停止する（ステップＳＴ２０８）。   In step ST206, when power supply is terminated (step ST206: YES), the power supply side control unit 104 controls the power supply unit 101 to stop power supply (step ST207), and the foreign object detection unit 103. Stops detecting foreign matter (step ST208).

＜異物の検出方法＞
図３は、本実施の形態における異物の検出方法を示す図である。なお、図３において、図１と同一構成である部分には同一符号を付して、その説明を省略する。 <Foreign matter detection method>
FIG. 3 is a diagram illustrating a foreign object detection method according to the present embodiment. In FIG. 3, parts having the same configuration as in FIG.

導光部１０２は、複数の光ファイバーケーブルにより構成され、給電面１０１ａに所定間隔で露出する複数の光ファイバーケーブルの一端１０２ａより入射した給電面１０１ａを照射する光を、異物検出部１０３まで導光する。   The light guide unit 102 is configured by a plurality of optical fiber cables, and guides the light that irradiates the power supply surface 101 a incident from one end 102 a of the plurality of optical fiber cables exposed to the power supply surface 101 a at a predetermined interval to the foreign matter detection unit 103. .

給電部１０１は、受電部１５７と対向する給電面１０１ａ、電磁誘導により受電部に誘導電流を発生させる給電コイル１０１ｂ、及び複数の光ファイバーケーブルにより構成される導光部１０２を有する。   The power supply unit 101 includes a power supply surface 101a that faces the power reception unit 157, a power supply coil 101b that generates an induced current in the power reception unit by electromagnetic induction, and a light guide unit 102 that includes a plurality of optical fiber cables.

給電面１０１ａは、投光部１５６が所定時間連続して発する光により照射される。給電面１０１ａには、複数の光ファイバーケーブルの一端１０２ａが所定間隔で露出する。光ファイバーケーブルの一端１０２ａは、少なくとも給電コイル１０１ｂを給電面１０１ａに投影したエリア内において露出させる。給電の際に、このエリア内に存在する異物が電磁誘導により加熱される恐れが高いからである。なお、給電面１０１ａの構成の詳細については後述する。   The power feeding surface 101a is irradiated with light emitted from the light projecting unit 156 continuously for a predetermined time. One end 102a of a plurality of optical fiber cables is exposed at a predetermined interval on the power supply surface 101a. One end 102a of the optical fiber cable is exposed at least in the area where the power supply coil 101b is projected onto the power supply surface 101a. This is because the foreign matter existing in this area is highly likely to be heated by electromagnetic induction during power feeding. Details of the configuration of the power feeding surface 101a will be described later.

受電部１５７は、充電コイル１５７ａを有し、給電コイル１０１ｂの電磁誘導により誘導電流を発生する。   The power receiving unit 157 includes a charging coil 157a and generates an induced current by electromagnetic induction of the power feeding coil 101b.

給電面１０１ａに異物が存在する場合には、異物が存在する箇所の光ファイバーケーブルの一端１０２ａから入射する光が異物により遮られることにより、異物検出部１０３において検出する光量は小さくなる。従って、異物検出部１０３は、検出した光量が小さくなった場合に異物を検出する。例えば、異物検出部１０３は、検出した光量を示す値が閾値以下になった場合に異物を検出する。   When there is a foreign object on the power supply surface 101a, light incident from the one end 102a of the optical fiber cable at the position where the foreign object exists is blocked by the foreign object, so that the amount of light detected by the foreign object detector 103 is reduced. Accordingly, the foreign object detection unit 103 detects a foreign object when the detected amount of light decreases. For example, the foreign object detection unit 103 detects a foreign object when a value indicating the detected light amount is equal to or less than a threshold value.

＜給電面の構成＞
図４は、給電部１０１の平面図である。なお、図４において、図１及び図３と同一構成である部分には同一符号を付して、その説明を省略する。 <Configuration of power supply surface>
FIG. 4 is a plan view of the power feeding unit 101. In FIG. 4, parts having the same configurations as those in FIGS. 1 and 3 are denoted by the same reference numerals, and description thereof is omitted.

給電面１０１ａには、平面から見て給電コイル１０１ｂが位置するエリアｒ１において、導光部１０２を構成する光ファイバーケーブルの一端１０２ａが、所定間隔Ｄで露出する。これにより、給電面１０１ａを照射する光は、給電面１０１ａに異物がない場合には、光ファイバーケーブルの一端１０２ａから入射し、光ファイバーケーブルにより異物検出部１０３まで導光される。一方、給電面１０１ａを照射する光は、給電面１０１ａに異物がある場合には、異物によって遮られるので、異物がある箇所の光ファイバーケーブルの一端１０２ａからは入射できない。従って、この場合には、異物検出部１０３で検出する光量は小さくなる。   One end 102a of the optical fiber cable constituting the light guide unit 102 is exposed at a predetermined interval D on the power supply surface 101a in an area r1 where the power supply coil 101b is located when viewed from above. Thereby, when there is no foreign object on the power supply surface 101a, the light that irradiates the power supply surface 101a enters from the one end 102a of the optical fiber cable and is guided to the foreign object detection unit 103 by the optical fiber cable. On the other hand, the light that irradiates the power supply surface 101a cannot be incident from the one end 102a of the optical fiber cable at the location where the foreign matter exists because the foreign matter is blocked by the foreign matter when the power supply surface 101a has foreign matter. Therefore, in this case, the amount of light detected by the foreign object detection unit 103 is reduced.

なお、給電面１０１ａにおける隣り合う光導入部１０２ａの間隔Ｄは、検出したい異物の大きさに応じて適宜変更することができる。また、給電面１０１ａにおける各光ファイバーケーブルの一端１０２ａの位置を異物検出部１０３で予め記憶しておくことにより、異物が存在する位置を特定することができる。また、異物が存在する位置を特定し、異物が存在する箇所の給電コイル１０１ｂからの給電のみを停止するようにすることができる。   In addition, the space | interval D of the adjacent light introduction part 102a in the electric power feeding surface 101a can be suitably changed according to the magnitude | size of the foreign material to detect. Further, the position of one end 102a of each optical fiber cable on the power feeding surface 101a is stored in advance by the foreign object detection unit 103, whereby the position where the foreign object exists can be specified. Further, it is possible to specify a position where a foreign object exists and stop only the power supply from the power supply coil 101b at the position where the foreign object exists.

＜本実施の形態の効果＞
本実施の形態では、給電面に露出する光ファイバーケーブルの一端の間隔は検出したい異物の大きさに応じて適宜変更することができるので、給電面上の小さい異物を検出することができる。 <Effects of the present embodiment>
In the present embodiment, the distance between the ends of the optical fiber cable exposed on the power supply surface can be changed as appropriate according to the size of the foreign material to be detected, so that a small foreign material on the power supply surface can be detected.

また、本実施の形態では、給電装置の給電面を照射する光を給電面から導光し、導光した光の明暗を検出する。光は給電コイルによる電磁誘導による影響を受けない。これにより、充電中であっても給電面上の異物を検出することができる。   Moreover, in this Embodiment, the light which irradiates the electric power feeding surface of an electric power feeder is guided from an electric power feeding surface, and the lightness and darkness of the guided light are detected. Light is not affected by electromagnetic induction by the feeding coil. Thereby, it is possible to detect foreign matter on the power feeding surface even during charging.

また、本実施の形態によれば、光により異物を検出するので、マイクロ波を用いた異物検出のように異物の検出に伴って異物自体が加熱されることを防ぐことができる。   Further, according to the present embodiment, since the foreign matter is detected by light, it is possible to prevent the foreign matter itself from being heated with the detection of the foreign matter as in the case of foreign matter detection using microwaves.

また、本実施の形態によれば、給電面上の異物が存在する場合には給電を停止することにより、異物が金属である場合には充電に伴って異物が加熱されることを防止することができる。   Further, according to the present embodiment, when foreign matter on the power feeding surface is present, power feeding is stopped, and when the foreign matter is metal, the foreign matter is prevented from being heated with charging. Can do.

また、本実施の形態によれば、導光部を光ファイバーケーブルで構成するので、給電コイルにより形成される磁界の影響を受けることなく異物を検出することができる。   Further, according to the present embodiment, since the light guide unit is constituted by the optical fiber cable, the foreign object can be detected without being affected by the magnetic field formed by the power feeding coil.

（実施の形態２）
本実施の形態では、導光部が移動しながら、給電面を照射する光を給電面から導光することを特徴とする。なお、本実施の形態において、給電部１０１以外の構成は上記の実施の形態１と同一構成であるので、その説明を省略する。 (Embodiment 2)
The present embodiment is characterized in that light that irradiates the power feeding surface is guided from the power feeding surface while the light guide portion moves. In the present embodiment, the configuration other than the power feeding unit 101 is the same as that of the above-described first embodiment, and thus description thereof is omitted.

＜給電部の構成＞
図５は、本発明の実施の形態２における給電部１０１の底面図である。なお、図５において、図１と同一構成である部分には同一符号を付して、その説明を省略する。 <Configuration of power supply unit>
FIG. 5 is a bottom view of power feeding unit 101 according to Embodiment 2 of the present invention. In FIG. 5, parts having the same configuration as in FIG.

導光部５０１は、磁界により加熱されない部材で形成されている。導光部５０１は、給電面１０１ａの給電コイル１０１ｂが位置するエリアｒ１に存在する異物を検出するために、ｍ１の範囲で給電面１０１ａに沿って移動する。導光部５０１は、可動部５０２の駆動力により移動しながら給電面１０１ａを照射する光を給電面１０１ａから導光する。これにより、異物検出部１０３は、給電面１０１ａのエリアｒ１内に存在する異物を検出することができる。   The light guide unit 501 is formed of a member that is not heated by a magnetic field. The light guide unit 501 moves along the power feeding surface 101a in a range of m1 in order to detect foreign matter existing in the area r1 where the power feeding coil 101b of the power feeding surface 101a is located. The light guide unit 501 guides the light that irradiates the power supply surface 101 a from the power supply surface 101 a while moving by the driving force of the movable unit 502. Thereby, the foreign material detection part 103 can detect the foreign material which exists in the area r1 of the electric power feeding surface 101a.

可動部５０２は、エリアｒ１に存在する異物を検出する際の邪魔にならないように、エリアｒ１の外側に設けられている。可動部５０２は、例えば電動モータであり、導光部５０１をｍ１の範囲で移動させる。電動モータ等の可動部５０２をエリアｒ１の外側に設けるのは、可動部５０２が給電コイル１０１ｂの電磁誘導による影響を受けないようにするためである。   The movable portion 502 is provided outside the area r1 so as not to interfere with the detection of foreign matter existing in the area r1. The movable unit 502 is, for example, an electric motor, and moves the light guide unit 501 within a range of m1. The reason why the movable portion 502 such as an electric motor is provided outside the area r1 is to prevent the movable portion 502 from being affected by electromagnetic induction of the power feeding coil 101b.

ガイドレール５０３ａ、５０３ｂは、互いに平行に設けられており、導光部５０１の移動をガイドする。   The guide rails 503a and 503b are provided in parallel to each other and guide the movement of the light guide unit 501.

異物検出部１０３は、エリアｒ１に存在する異物を検出する際の邪魔にならないように、エリアｒ１の外側に設けられている。異物検出部１０３は、導光部５０１が移動しながら給電面１０１ａから導光した光の明暗を検出する。   The foreign object detection unit 103 is provided outside the area r1 so as not to interfere with detection of foreign objects existing in the area r1. The foreign object detection unit 103 detects the brightness of light guided from the power supply surface 101a while the light guide unit 501 moves.

＜異物の検出方法＞
図６は、本実施の形態における異物の検出方法を示す図である。なお、図６において、図１、図３及び図５と同一構成である部分には同一符号を付して、その説明を省略する。 <Foreign matter detection method>
FIG. 6 is a diagram illustrating a foreign object detection method according to the present embodiment. In FIG. 6, parts having the same configurations as those in FIGS. 1, 3, and 5 are denoted by the same reference numerals, and description thereof is omitted.

導光部５０１は、ｍ１の範囲で給電面１０１ａに対して平行に移動する。導光部５０１は、複数の光ファイバーケーブル６０１により異物検出部１０３と接続している。導光部５０１は、給電面１０１ａを照射する光を給電面１０１ａから各光ファイバーケーブル６０１に導光する。   The light guide unit 501 moves in parallel to the power feeding surface 101a within a range of m1. The light guide unit 501 is connected to the foreign object detection unit 103 by a plurality of optical fiber cables 601. The light guide unit 501 guides the light irradiating the power feeding surface 101a from the power feeding surface 101a to each optical fiber cable 601.

給電面１０１ａを照射する光は、給電面１０１ａに異物がある場合には、異物によって遮られるので、異物がある箇所では導光部５０１から導光されない。この場合には、異物検出部１０３で検出する光量は小さくなる。従って、異物検出部１０３は、検出した光量が小さい場合に異物を検出する。例えば、異物検出部１０３は、検出した光量を示す値が閾値以下になった場合に異物を検出する。   The light that irradiates the power feeding surface 101a is blocked by the foreign matter when there is a foreign matter on the power feeding surface 101a, and therefore is not guided from the light guide unit 501 at the location where the foreign matter is present. In this case, the amount of light detected by the foreign object detection unit 103 is small. Accordingly, the foreign object detection unit 103 detects a foreign object when the detected light amount is small. For example, the foreign object detection unit 103 detects a foreign object when a value indicating the detected light amount is equal to or less than a threshold value.

＜本実施の形態の効果＞
本実施の形態によれば、上記の実施の形態１の効果に加えて、導光部は移動しながら給電面から光を導光するので、給電面から光を導光するための光ファイバーケーブルの数を少なくすることができ、製造コストを低減することができる。 <Effects of the present embodiment>
According to the present embodiment, in addition to the effects of the first embodiment, the light guide unit guides light from the power feeding surface while moving, so that the optical fiber cable for guiding light from the power feeding surface can be used. The number can be reduced, and the manufacturing cost can be reduced.

また、本実施の形態によれば、給電コイルを設けるエリア全体に導光部を配置する必要がないので、導光部を小さくすることができ、製造コストを低減することができる。   Moreover, according to this Embodiment, since it is not necessary to arrange | position a light guide part to the whole area which provides a feeding coil, a light guide part can be made small and manufacturing cost can be reduced.

＜本実施の形態の変形例＞
本実施の形態において、投光部１５６は給電面の全面を照射したが、本発明はこれに限らず、投光部１５６は移動する導光部５０１に合わせて、導光部５０１が存在する範囲を選択的に照射するようにすることができる。 <Modification of the present embodiment>
In the present embodiment, the light projecting unit 156 irradiates the entire power supply surface. However, the present invention is not limited to this, and the light projecting unit 156 includes the light guide unit 501 in accordance with the moving light guide unit 501. A range can be selectively irradiated.

＜全ての実施の形態に共通の変形例＞
上記実施の形態１及び実施の形態２において、電磁誘導方式により充電したが、本発明はこれに限らず、磁気共鳴方式またはマイクロ波方式等の任意の方式により充電することができる。 <Modification common to all embodiments>
In Embodiment 1 and Embodiment 2 described above, charging is performed by an electromagnetic induction method. However, the present invention is not limited to this, and charging can be performed by any method such as a magnetic resonance method or a microwave method.

また、上記実施の形態１及び実施の形態２において、投光部を２つ設けたが、本発明はこれに限らず、給電面を一様に照射できれば任意の数の投光部を設けることができる。   In the first embodiment and the second embodiment, two light projecting units are provided. However, the present invention is not limited to this, and an arbitrary number of light projecting units may be provided as long as the power feeding surface can be uniformly irradiated. Can do.

また、上記実施の形態１及び実施の形態２において、光ファイバーケーブルにより給電面から光を導光したが、本発明はこれに限らず、光を導光できる任意の部材を用いることができる。   In the first and second embodiments, light is guided from the power feeding surface by the optical fiber cable. However, the present invention is not limited to this, and any member that can guide light can be used.

また、上記実施の形態１及び実施の形態２において、投光部からの光は所定時間連続して照射されることにしたが、本発明はこれに限らず、間欠的に点灯したり、任意の点滅パターンで点灯するようにしてもよい。この場合、給電側制御部は、投光部が光を照射するタイミングに合わせて、異物検出部に対して異物の検出を開始するように制御する。   In the first embodiment and the second embodiment, the light from the light projecting unit is continuously irradiated for a predetermined time. However, the present invention is not limited to this, and the light is intermittently turned on or arbitrarily. It may be lit with a blinking pattern. In this case, the power supply side control unit controls the foreign matter detection unit to start detecting the foreign matter in accordance with the timing at which the light projecting unit emits light.

また、上記実施の形態１及び実施の形態２において、投光部からの光は可視光に限らず、赤外線などの不可視光を用いても良い。   In the first and second embodiments, the light from the light projecting unit is not limited to visible light, and invisible light such as infrared light may be used.

また、上記実施の形態１及び実施の形態２において、車輌側制御部が充電開始信号を出力した後に投光部により給電面を照射して異物を検出したが、本発明はこれに限らず、ユーザの指示を受けた際に投光部により給電面を照射して異物を検出するようにしてもよい。   Further, in the first embodiment and the second embodiment, the vehicle-side control unit outputs a charge start signal, and then the light projecting unit irradiates the power feeding surface to detect the foreign matter, but the present invention is not limited to this, When receiving a user's instruction, the light projecting unit may irradiate the power supply surface to detect foreign matter.

また、上記実施の形態１及び実施の形態２において、投光部を車輌に設けたが、本発明はこれに限らず、投光部を給電装置に設けてもよいし、投光部を給電装置の近くの地面に設置してもよい。   Further, in the first embodiment and the second embodiment, the light projecting unit is provided in the vehicle. However, the present invention is not limited to this, and the light projecting unit may be provided in the power feeding device. It may be installed on the ground near the device.

本発明にかかる給電装置は、車輌に設けられた受電部に対して給電するのに好適である。   The power supply device according to the present invention is suitable for supplying power to a power receiving unit provided in a vehicle.

１０ 充電システム
１００ 給電装置
１０１ 給電部
１０１ａ 給電面
１０２ 導光部
１０３ 異物検出部
１０４ 給電側制御部
１０５ 給電側通信部
１５０ 車輌
１５１ 車速センサ
１５２ シフトポジションセンサ
１５３ 車輌側制御部
１５４ 表示部
１５５ 車輌側通信部
１５６ 投光部
１５７ 受電部
１５８ 蓄電池
１７０ 充電装置 DESCRIPTION OF SYMBOLS 10 Charging system 100 Power supply apparatus 101 Power supply part 101a Power supply surface 102 Light guide part 103 Foreign substance detection part 104 Power supply side control part 105 Power supply side communication part 150 Vehicle 151 Vehicle speed sensor 152 Shift position sensor 153 Vehicle side control part 154 Display part 155 Vehicle side Communication unit 156 Light projecting unit 157 Power receiving unit 158 Storage battery 170 Charging device

Claims (5)

車輌に設けられた受電部に対して給電する給電装置であって、
前記受電部に給電する際に非接触状態で前記受電部と対向する給電面を有する給電部と、
前記給電面に照射された光を前記給電面から導光する導光部と、
前記導光部により導光した光の明暗を検出することにより、前記給電面に存在する異物を検出する検出部と、
電磁誘導方式、磁気共鳴方式、またはマイクロ波方式により前記受電部に誘導電流を発生させる給電コイルと、
を備え、
前記導光部は、前記給電部において前記給電面に沿って移動可能であり、
前記検出部は、前記導光部が移動しながら前記給電面から導光した光の明暗を検出する、
給電装置。 A power supply device that supplies power to a power receiving unit provided in a vehicle,
A power feeding unit having a power feeding surface facing the power receiving unit in a non-contact state when feeding power to the power receiving unit;
A light guide unit that guides light applied to the power feeding surface from the power feeding surface;
A detection unit for detecting foreign matter present on the power feeding surface by detecting light and darkness of light guided by the light guide unit;
A power supply coil that generates an induced current in the power receiving unit by electromagnetic induction, magnetic resonance, or microwave;
With
The light guide portion is movable along the power feeding surface in the power feeding portion,
The detection unit detects light and darkness of light guided from the power feeding surface while the light guide unit is moving.
Power supply device. 前記導光部は、
複数の光ファイバーケーブルにより構成され、前記給電面に所定間隔で露出する前記複数の光ファイバーケーブルの一端より入射した前記給電面を照射する光を導光する、
請求項１記載の給電装置。 The light guide is
It is composed of a plurality of optical fiber cables, and guides light that irradiates the power feeding surface incident from one end of the plurality of optical fiber cables exposed to the power feeding surface at a predetermined interval.
The power feeding device according to claim 1. 前記導光部を移動させる可動部をさらに具備し、
前記可動部は、平面から見て前記給電コイルが位置するエリアの外側に設けられる、
請求項１記載の給電装置。 It further comprises a movable part that moves the light guide part,
The movable part is provided outside an area where the feeding coil is located when viewed from a plane.
The power feeding device according to claim 1 . 前記検出部により異物を検出した際に前記給電部による給電を停止させる制御部をさらに具備する、
請求項１乃至３のいずれかに記載の給電装置。 Further comprising a control unit that stops power feeding by the power feeding unit when a foreign object is detected by the detection unit;
The power feeding device according to claim 1. 前記給電面は、前記車輌の底面に設けられた投光部が発する光により照射される、
請求項１乃至４のいずれかに記載の給電装置。 The power feeding surface is irradiated with light emitted from a light projecting unit provided on the bottom surface of the vehicle.
The power feeding device according to claim 1.
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