JP5010715B2 - Vehicle parking assist device and electric vehicle including the same - Google Patents

Vehicle parking assist device and electric vehicle including the same Download PDF

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JP5010715B2
JP5010715B2 JP2010138090A JP2010138090A JP5010715B2 JP 5010715 B2 JP5010715 B2 JP 5010715B2 JP 2010138090 A JP2010138090 A JP 2010138090A JP 2010138090 A JP2010138090 A JP 2010138090A JP 5010715 B2 JP5010715 B2 JP 5010715B2
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vehicle
power
transmission unit
power transmission
distance
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JP2012005243A (en
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宏明 中西
佑輝子 川端
真士 市川
裕之 立花
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アイシン精機株式会社
トヨタ自動車株式会社
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • 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
    • B60L50/00Electric propulsion with power supplied within the vehicle
    • B60L50/10Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/16Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
    • 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
    • B60L50/00Electric propulsion with power supplied within the vehicle
    • B60L50/40Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
    • 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
    • B60L50/00Electric propulsion with power supplied within the vehicle
    • B60L50/50Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • 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
    • 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
    • B60L53/30Constructional details of charging stations
    • B60L53/35Means for automatically adjusting the relative position of charging devices and vehicles
    • B60L53/37Means for automatically adjusting the relative position of charging devices and vehicles using optical position determination, e.g. using cameras
    • 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
    • B60L53/30Constructional details of charging stations
    • B60L53/35Means for automatically adjusting the relative position of charging devices and vehicles
    • B60L53/38Means for automatically adjusting the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
    • B60L53/39Means for automatically adjusting the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
    • 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
    • B60L9/00Electric propulsion with power supply external to the vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D15/00Steering not otherwise provided for
    • B62D15/02Steering position indicators ; Steering position determination; Steering aids
    • B62D15/027Parking aids, e.g. instruction means
    • B62D15/0285Parking performed automatically
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D6/00Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/14Traffic control systems for road vehicles indicating individual free spaces in parking areas
    • 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
    • B60L2210/00Converter types
    • B60L2210/10DC to DC converters
    • B60L2210/14Boost converters
    • 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
    • B60L2210/00Converter types
    • B60L2210/30AC to DC converters
    • 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
    • B60L2210/00Converter types
    • B60L2210/40DC to AC converters
    • 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
    • B60L2220/00Electrical machine types; Structures or applications thereof
    • B60L2220/10Electrical machine types
    • B60L2220/14Synchronous machines
    • 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
    • B60L2250/00Driver interactions
    • B60L2250/16Driver interactions by display
    • 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
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    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/62Hybrid vehicles
    • Y02T10/6213Hybrid vehicles using ICE and electric energy storage, i.e. battery, capacitor
    • Y02T10/6217Hybrid vehicles using ICE and electric energy storage, i.e. battery, capacitor of the series type or range extenders
    • 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
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    • 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
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    • Y02T10/7077Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors on board the vehicle
    • 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
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    • Y02T10/7216DC to DC power conversion
    • Y02T10/7225Using step - up or boost converters
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Description

  The present invention relates to a vehicle parking assist device and an electric vehicle including the same, and in particular, can receive electric power transmitted from a power transmission unit of a power supply facility provided outside the vehicle by a power receiving unit in a contactless manner and store the electric power in a power storage device. The present invention relates to vehicle parking assist control.

  Japanese Patent Laying-Open No. 2007-97345 (Patent Document 1) discloses a parking assistance device that can be easily charged. The parking assist device includes a touch display including a display unit that displays a surrounding situation of the vehicle and an input unit that inputs a target parking position of the vehicle, and a control device that performs parking assist control by calculating a route according to the target parking position. With. The control device further performs alignment support control between the vehicle-side power transfer unit provided in the vehicle and the device-side power transfer unit of the device provided on the ground under a predetermined condition. Preferably, the parking assist device further includes a back monitor camera that captures a surrounding situation of the vehicle. The control device recognizes the position of the identifier and performs alignment support control when there is an identifier indicating the device-side power transfer unit in the vicinity of the target parking position in the captured surrounding situation.

  According to this parking assist device, the driver can easily perform charging, and the complexity of charging is reduced. As a result, it is said that it can also contribute to the spread of vehicles that require charging (see Patent Document 1).

JP 2007-97345 A

  In recent years, wireless power transmission that does not use a power cord or a power transmission cable has attracted attention as a method for supplying power from a power supply facility to a vehicle that requires charging. As this wireless power transmission technology, three technologies known as power transmission using electromagnetic induction, power transmission using microwaves, and power transmission using a resonance method are known.

  Among them, the resonance method is a non-contact power transmission technique in which a pair of resonators (for example, a pair of self-resonant coils) are resonated in an electromagnetic field (near field) and transmitted through the electromagnetic field. It is also possible to transmit power over a long distance (for example, several meters).

  In such a non-contact type power feeding method, in order to perform efficient power feeding, it is important to align the power transmission unit of the power feeding facility and the power receiving unit mounted on the vehicle. That is, when a non-contact type power supply method such as a resonance method is used for power supply from the power supply facility to the vehicle, the vehicle parking accuracy with respect to the power supply facility is important in order to increase power supply efficiency.

  However, when parking support control to the power supply facility is performed using an image of an imaging device that captures the outside of the vehicle, in a non-contact type power supply facility in which the power transmission unit of the power supply facility is often embedded in the ground, The unit may not be recognized by the photographic device. Although it is conceivable to provide a light emitter or the like on the upper part of the power transmission unit, there is a possibility that it may not be a good solution in consideration of failure resistance and environment resistance.

  Accordingly, the present invention has been made to solve such a problem, and an object of the present invention is to receive power transmitted from a power transmission unit of a power supply facility provided outside the vehicle by a power receiving unit in a non-contact manner and to store a power storage device. In a vehicle capable of storing electricity, the recognition accuracy of the power transmission unit by the imaging device that captures the outside of the vehicle is improved to improve the parking accuracy of the vehicle with respect to the power supply facility.

  According to the present invention, the vehicle parking assistance device is a vehicle parking assistance device capable of receiving the electric power sent from the power transmission unit of the power supply facility provided outside the vehicle in a non-contact manner and storing the electric power in the power storage device. And an imaging apparatus and a guidance control unit. The photographing device photographs the outside of the vehicle. The guidance control unit controls the vehicle to guide the vehicle to the power transmission unit based on the image photographed by the photographing device. The power transmission unit has at least one side surface and an upper surface that can be recognized by the photographing apparatus. The guidance control unit recognizes the power transmission unit based on the image of the side surface of the power transmission unit photographed by the photographing device when the distance between the power supply facility and the vehicle is larger than the predetermined first distance. When the distance between the power supply facility and the vehicle is equal to or less than the first distance, the power transmission unit is recognized based on the image of the upper surface of the power transmission unit photographed by the photographing device.

  Preferably, when the distance between the power supply facility and the vehicle is greater than a predetermined second distance that is greater than the first distance, the guidance control unit sets a parking position where the vehicle can receive power from the power supply facility. The vehicle is controlled to guide the vehicle to the parking frame shown.

  More preferably, the parking frame is displayed on the road surface. And a guidance control part recognizes a parking frame based on the image image | photographed with the imaging device, when the distance between electric power feeding equipment and a vehicle is larger than 2nd distance.

  Further, according to the present invention, the vehicle parking assist device can receive the electric power sent from the power transmission unit of the power supply facility provided outside the vehicle by the power receiving unit in a non-contact manner and store the electric power in the power storage device. The apparatus includes an imaging device and a guidance control unit. The photographing device photographs the outside of the vehicle. The guidance control unit controls the vehicle to guide the vehicle to the power transmission unit based on the image photographed by the photographing device. A parking frame indicating a parking position where the vehicle can receive power from the power supply facility is displayed on the road surface. Then, the guidance control unit guides the vehicle to the parking frame recognized based on the image photographed by the photographing device when the distance between the power supply facility and the vehicle is larger than a predetermined first distance. When the vehicle is controlled and the distance between the power supply facility and the vehicle is equal to or less than the first distance, the power transmission unit is recognized based on the image photographed by the photographing device.

  Preferably, the guidance control unit is photographed by the photographing device when the distance between the power supply facility and the vehicle is equal to or smaller than the first distance and larger than a second distance smaller than the first distance. Recognizing the power transmission unit based on the image of the side of the power transmission unit, and transmitting power based on the image of the upper surface of the power transmission unit photographed by the photographing device when the distance between the power supply facility and the vehicle is equal to or less than the second distance Recognize the unit.

  Preferably, the power transmission unit includes a power feeding coil and a cover. The feeding coil is for sending electric power to the power receiving unit. The cover is provided so as to cover the power feeding coil from above, and has at least one side surface and an upper surface that can be recognized by the photographing apparatus. Then, the guidance control unit recognizes the power transmission unit based on the cover image photographed by the photographing device.

  According to the invention, the electric vehicle is configured to receive the electric power sent from any of the parking assist devices described above and the power transmission unit of the power supply facility provided outside the vehicle in a non-contact manner. And a power storage device that stores the power received by the power receiving unit, and an electric motor that receives the power from the power storage device and generates running torque.

  According to the present invention, since the power transmission unit can be reliably recognized based on the image of the imaging device, whether the distance from the vehicle to the power supply facility is long or short, the recognition accuracy of the power transmission unit by the imaging device is improved. Thus, the parking accuracy of the vehicle with respect to the power supply facility can be improved.

1 is an overall configuration diagram of a vehicle power feeding system to which a vehicle parking assistance device according to an embodiment of the present invention is applied. It is a figure for demonstrating the relationship between the position of a vehicle, and parking assistance control. It is a 1st figure for demonstrating the relationship between the position of a vehicle and parking assistance control when a power transmission unit is image-recognized with a camera. It is a 2nd figure for demonstrating the relationship between the position of a vehicle and parking assistance control when a power transmission unit is image-recognized with a camera. It is an external view of a power transmission unit. It is a figure for demonstrating the principle of the power transmission by the resonance method. FIG. 2 is an overall block diagram of a hybrid vehicle shown as an example of the vehicle shown in FIG. 1. It is a functional block diagram of the control apparatus shown in FIG. It is a whole flowchart of the parking assistance control performed by the control apparatus shown in FIG. It is a flowchart for demonstrating the process sequence of the parking assistance control based on image information shown in FIG. FIG. 10 is a flowchart for explaining a processing procedure of stop assistance control based on a power reception state shown in FIG. 9. FIG. It is another external view of a power transmission unit.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  FIG. 1 is an overall configuration diagram of a vehicle power supply system to which a vehicle parking assistance apparatus according to an embodiment of the present invention is applied. Referring to FIG. 1, vehicle power supply system 10 includes a vehicle 100 and a power supply facility 200. Vehicle 100 includes a power receiving unit 110, a camera 120, and a communication unit 130.

  The power receiving unit 110 is provided on the bottom surface of the vehicle 100 and is configured to receive power transmitted from a power transmission unit 220 (described later) of the power supply facility 200 in a contactless manner. Specifically, the power receiving unit 110 includes a self-resonant coil (described later), and receives power from the power transmitting unit 220 in a non-contact manner by resonating with a self-resonant coil included in the power transmitting unit 220 via an electromagnetic field. The camera 120 captures the outside of the vehicle 100. As an example, the camera 120 is provided at the rear of the vehicle 100 and captures the rear of the vehicle in order to detect the positional relationship between the vehicle 100 and the power transmission unit 220. Communication unit 130 is a communication interface for performing communication between vehicle 100 and power supply facility 200.

  The power supply facility 200 includes a power supply device 210, a power transmission unit 220, and a communication unit 240. The power supply device 210 converts, for example, commercial AC power supplied from a system power supply into high-frequency power and outputs it to the power transmission unit 220. The frequency of the high frequency power generated by the power supply device 210 is, for example, 1 MNz to 10 and several MHz.

  The power transmission unit 220 is fixed to the floor of the parking lot, and is configured to transmit the high-frequency power supplied from the power supply device 210 to the power receiving unit 110 of the vehicle 100 in a non-contact manner. Specifically, the power transmission unit 220 includes a self-resonant coil similar to the power reception unit 110 of the vehicle 100, and transmits power to the power reception unit 110 in a non-contact manner by resonating with the self-resonance coil of the power reception unit 110 via an electromagnetic field.

  The power transmission unit 220 has at least one side surface and an upper surface that can be recognized by the camera 120 of the vehicle 100 so that the camera 120 can recognize the power transmission unit 220 even if there is a distance between the vehicle 100 and the power transmission unit 220. Have. That is, the power transmission unit 220 has at least one side surface and an upper surface protruding above the ground surface without being completely buried in the ground. Communication unit 240 is a communication interface for performing communication between power supply facility 200 and vehicle 100.

  In the vehicle power supply system 10, high-frequency power is supplied from the power supply device 210 to the power transmission unit 220 in the power supply facility 200, and the self-resonant coil included in the power transmission unit 220 and the self-resonant coil included in the power reception unit 110 of the vehicle 100. Resonates through the electromagnetic field, so that power is supplied from the power supply facility 200 to the vehicle 100 in a non-contact manner. Here, in this vehicle electric power feeding system 10, the parking assistance control which guides the vehicle 100 to the electric power feeding equipment 200 (power transmission unit 220) is performed. In this embodiment, parking support control is roughly divided into two stages.

  In the first stage, the vehicle 100 is guided toward the power supply facility 200 based on the image captured by the camera 120. The first stage based on the image captured by the camera 120 is further divided into three stages.

  That is, when the distance between the vehicle 100 and the power supply facility 200 is greater than a predetermined L1, a parking frame (such as a white line drawn on the road) provided in the power supply facility 200 is photographed by the camera 120. The parking frame is image-recognized based on the photographed image. Then, a route to the target parking position is calculated based on the image recognition result of the parking frame, and the vehicle 100 is guided toward the power supply facility 200.

  When the distance between the vehicle 100 and the power supply facility 200 is equal to or less than L1, the power transmission unit 220 is recognized based on the image of the side surface of the power transmission unit 220 taken by the camera 120. Then, a route to the target parking position is calculated based on the image recognition result of the power transmission unit 220, and the vehicle 100 is guided toward the power supply facility 200.

  Further, when the distance between the vehicle 100 and the power supply facility 200 is equal to or less than a predetermined L2 (<L1), the power transmission unit 220 is recognized based on the image of the upper surface of the power transmission unit 220 taken by the camera 120. The Then, a route to the target parking position is calculated based on the image recognition result of the power transmission unit 220, and the vehicle 100 is guided toward the power supply facility 200.

  When the vehicle 100 is guided to a predetermined position with respect to the power transmission unit 220, the first stage is switched to the second stage. In this second stage, power is transmitted from the power transmission unit 220 to the power reception unit 110, and the vehicle 100 is guided to the power transmission unit 220 based on the power reception status of the power reception unit 110. Specifically, the distance between the power transmission unit 220 and the power reception unit 110 is estimated based on the power reception status of the power reception unit 110, and the power transmission unit 220 and the power reception unit 110 are aligned based on the estimation result.

  Note that the magnitude of the power transmitted from the power transmission unit 220 at the second stage is set to be smaller than the power supplied from the power transmission unit 220 to the power reception unit 110 after the alignment between the power transmission unit 220 and the power reception unit 110 is completed. Is done. The reason why the power is transmitted from the power transmission unit 220 in the second stage is that the power transmission unit 220 and the power reception unit 110 are aligned, and a large amount of power is not required for full-scale power supply.

  FIG. 2 is a diagram for explaining the relationship between the position of the vehicle 100 and the parking assistance control. Referring to FIG. 2, when vehicle 100 is far from power transmission unit 220 (FIG. 2A), camera 120 (not shown) in which parking frame 250 provided in power supply facility 200 is provided at the rear of the vehicle body. The parking frame 250 is image-recognized based on the captured image. Then, the vehicle 100 is guided based on the image recognition result of the parking frame 250.

  When the vehicle 100 approaches the power transmission unit 220 to a predetermined distance ((B) in FIG. 2), the power transmission unit 220 is recognized based on the image captured by the camera 120. Based on the image recognition result of the power transmission unit 220, the vehicle 100 is guided toward the power supply facility 200.

  FIGS. 3 and 4 are diagrams for explaining the relationship between the position of the vehicle 100 and the parking assistance control when the power transmission unit 220 is recognized by the camera 120. Referring to FIG. 3, when vehicle 100 is some distance away from power transmission unit 220 (medium distance), power transmission unit 220 is imaged based on the image of the side surface of power transmission unit 220 taken by camera 120. Be recognized. Then, vehicle 100 is guided toward power transmission unit 220 based on the image recognition result of power transmission unit 220.

  Referring to FIG. 4, when vehicle 100 approaches power transmission unit 220 (short distance), power transmission unit 220 is image-recognized based on the image of the upper surface of power transmission unit 220 taken by camera 120. The Then, vehicle 100 is guided toward power transmission unit 220 based on the image recognition result of power transmission unit 220.

  FIG. 5 is an external view of the power transmission unit 220. Referring to FIG. 5, power transmission unit 220 has at least one side 221 and an upper surface 222 that can be recognized by camera 120 of vehicle 100 (not shown). For example, a color difference is provided between the side surface 221 and the upper surface 222 so that the side surface 221 and the upper surface 222 can be identified based on an image captured by the camera 120.

  In order to protect the power transmission unit 220, it is preferable to provide a cover so as to cover the upper part of the self-resonant coil included in the power transmission unit 220, and the side surface and the upper surface of the cover are the side surface 221 and the upper surface 222.

Next, the principle of power transmission by the resonance method will be described.
FIG. 6 is a diagram for explaining the principle of power transmission by the resonance method. Referring to FIG. 6, in this resonance method, in the same way as two tuning forks resonate, two LC resonance coils having the same natural frequency resonate in an electromagnetic field (near field), and thereby, from one coil. Electric power is transmitted to the other coil via an electromagnetic field.

  As an example, a primary coil 320 is connected to a high-frequency power source 310, and high-frequency power of 1 MHz to 10 and several MHz is supplied to a primary self-resonant coil 330 that is magnetically coupled to the primary coil 320 by electromagnetic induction. The primary self-resonant coil 330 is an LC resonator having an inductance and stray capacitance of the coil itself, and resonates with a secondary self-resonant coil 340 having the same resonance frequency as the primary self-resonant coil 330 via an electromagnetic field (near field). . Then, energy (electric power) moves from the primary self-resonant coil 330 to the secondary self-resonant coil 340 via the electromagnetic field. The energy (electric power) transferred to the secondary self-resonant coil 340 is taken out by the secondary coil 350 magnetically coupled to the secondary self-resonant coil 340 by electromagnetic induction and supplied to the load 360. Note that power transmission by the resonance method is realized when the Q value indicating the resonance intensity between the primary self-resonant coil 330 and the secondary self-resonant coil 340 is greater than 100, for example.

  1, the secondary self-resonant coil 340 and the secondary coil 350 correspond to the power receiving unit 110 in FIG. 1, and the primary coil 320 and the primary self-resonant coil 330 correspond to the power transmission unit 220 in FIG. 1. Correspond.

  FIG. 7 is an overall block diagram of a hybrid vehicle shown as an example of vehicle 100 shown in FIG. Referring to FIG. 7, vehicle 100 includes a power storage device 150, a system main relay SMR1, a boost converter 162, inverters 164, 166, motor generators 172, 174, an engine 176, a power split device 177, Drive wheel 178. Vehicle 100 further includes a secondary self-resonant coil 112, a secondary coil 114, a rectifier 140, a DC / DC converter 142, a system main relay SMR2, and a voltage sensor 190. Furthermore, the vehicle 100 includes a control device 180, a camera 120, a communication unit 130, a display 182, a parking assistance switch (hereinafter also referred to as “PA (Parking Assist) switch”) 184, and a power supply request switch 186. In addition.

  The vehicle 100 is equipped with an engine 176 and a motor generator 174 as power sources. Engine 176 and motor generators 172 and 174 are connected to power split device 177. Vehicle 100 travels with a driving force generated by at least one of engine 176 and motor generator 174. The power generated by the engine 176 is divided into two paths by the power split device 177. That is, one is a path transmitted to the drive wheel 178 and the other is a path transmitted to the motor generator 172.

  Motor generator 172 is an AC rotating electric machine, and includes, for example, a three-phase AC synchronous motor in which a permanent magnet is embedded in a rotor. Motor generator 172 generates power using the kinetic energy of engine 176 divided by power split device 177. For example, when the state of charge of power storage device 150 (also referred to as “SOC (State Of Charge)”, for example, expressed as a percentage of the fully charged state) becomes lower than a predetermined value, engine 176 is started. Electricity is generated by motor generator 172 and power storage device 150 is charged.

  The motor generator 174 is also an AC rotating electric machine, and is composed of, for example, a three-phase AC synchronous motor in which a permanent magnet is embedded in a rotor, like the motor generator 172. Motor generator 174 generates a driving force using at least one of the electric power stored in power storage device 150 and the electric power generated by motor generator 172. Then, the driving force of motor generator 174 is transmitted to driving wheel 178.

  Power split device 177 includes a planetary gear including a sun gear, a pinion gear, a carrier, and a ring gear. The pinion gear engages with the sun gear and the ring gear. The carrier supports the pinion gear so as to be able to rotate and is coupled to the crankshaft of the engine 176. The sun gear is coupled to the rotation shaft of motor generator 172. The ring gear is connected to the rotation shaft of motor generator 174 and drive wheel 178.

  The power storage device 150 is a rechargeable DC power source, and is composed of, for example, a secondary battery such as lithium ion or nickel metal hydride. Power storage device 150 stores charging power supplied from DC / DC converter 142 and also stores regenerative power generated by motor generators 172 and 174. Power storage device 150 supplies the stored power to boost converter 162. Note that a large-capacity capacitor can also be used as the power storage device 150.

  System main relay SMR1 is arranged between power storage device 150 and boost converter 162. System main relay SMR1 electrically connects power storage device 150 to boost converter 162 when signal SE1 from control device 180 is activated, and power storage device 150 and boost converter when signal SE1 is deactivated. The electric path to 162 is cut off. Boost converter 162 boosts the voltage on positive line PL <b> 2 to a voltage equal to or higher than the voltage output from power storage device 150 based on signal PWC from control device 180. Boost converter 162 is formed of a DC chopper circuit, for example. Inverters 164 and 166 are provided corresponding to motor generators 172 and 174, respectively. Inverter 164 drives motor generator 172 based on signal PWI 1 from control device 180, and inverter 166 drives motor generator 174 based on signal PWI 2 from control device 180. Inverters 164 and 166 are formed of, for example, a three-phase bridge circuit.

  The secondary self-resonant coil 112 is an LC resonant coil whose both ends are open (not connected), and receives power from the power supply facility 200 by resonating with a primary self-resonant coil (not shown) of the power supply facility 200 via an electromagnetic field. . The capacitance component of the secondary self-resonant coil 112 is the stray capacitance of the coil, but capacitors connected to both ends of the coil may be provided. Regarding the secondary self-resonant coil 112, the primary self-resonant coil and the secondary self-resonant coil 112 are based on the distance from the primary self-resonant coil of the power supply facility 200, the resonance frequency of the primary self-resonant coil and the secondary self-resonant coil 112, and the like. The number of turns is appropriately set so that the Q value (for example, Q> 100) indicating the resonance intensity with the resonance coil 112 and κ indicating the coupling degree thereof are increased.

  The secondary coil 114 is disposed coaxially with the secondary self-resonant coil 112 and can be magnetically coupled to the secondary self-resonant coil 112 by electromagnetic induction. The secondary coil 114 takes out the electric power received by the secondary self-resonant coil 112 by electromagnetic induction and outputs it to the rectifier 140. The secondary self-resonant coil 112 and the secondary coil 114 form the power receiving unit 110 shown in FIG.

  The rectifier 140 rectifies the AC power extracted by the secondary coil 114. Based on signal PWD from control device 180, DC / DC converter 142 converts the power rectified by rectifier 140 into a voltage level of power storage device 150 and outputs the voltage level to power storage device 150. System main relay SMR <b> 2 is arranged between DC / DC converter 142 and power storage device 150. System main relay SMR2 electrically connects power storage device 150 to DC / DC converter 142 when signal SE2 from control device 180 is activated, and power storage device 150 when signal SE2 is deactivated. The electric circuit between the DC / DC converter 142 is cut off. Voltage sensor 190 detects voltage VH between rectifier 140 and DC / DC converter 142 and outputs the detected value to control device 180.

  The display 182 receives information about an image captured by the camera 120 from the control device 180 when the parking assistance control is executed, and displays the received image information. As the display 182, for example, a display of a car navigation device can be used.

  Control device 180 generates signals PWC, PWI1, and PWI2 for driving boost converter 162 and motor generators 172 and 174, respectively, based on the accelerator opening, vehicle speed, and other signals from various sensors. The signals PWC, PWI1, and PWI2 are output to boost converter 162 and inverters 164 and 166, respectively. When the vehicle travels, control device 180 activates signal SE1 to turn on system main relay SMR1, and deactivates signal SE2 to turn off system main relay SMR2.

  When PA switch 184 and power supply request switch 186 are turned on by the user, control device 180 receives information about the image captured by camera 120 from camera 120 and outputs the received image information to display 182. To do. Further, control device 180 receives a detection value of voltage VH detected by voltage sensor 190 from voltage sensor 190. And the control apparatus 180 performs parking assistance control by the method mentioned later so that the vehicle 100 may be guide | induced to the power transmission unit 220 (FIG. 1) of the electric power feeding equipment 200 based on these data.

  When the positioning of the power transmission unit 220 and the power receiving unit 110 of the vehicle 100 is completed by the parking support control, the control device 180 transmits a power supply command to the power supply facility 200 via the communication unit 130 and activates the signal SE2. System main relay SMR2 is turned on. Then, control device 180 generates a signal PWD for driving DC / DC converter 142 and outputs the generated signal PWD to DC / DC converter 142. Thereby, charging of power storage device 150 by power supply facility 200 is started.

  The PA switch 184 is a switch for a user to request parking assistance using the camera 120 and the display 182. The power supply request switch 186 is a switch for a user to request charging of the power storage device 150 by the power supply facility 200.

  FIG. 8 is a functional block diagram of the control device 180 shown in FIG. Referring to FIG. 8, control device 180 includes a parking assist ECU (Electronic Control Unit) 410, a steering ECU 420, a vehicle ECU 430, a motor control ECU 440, and a charging ECU 450.

  When the PA switch 184 and the power supply request switch 186 (not shown) are turned on, the parking assist ECU 410 guides the vehicle 100 to the power transmission unit 220 (FIG. 1) of the power supply facility 200 based on image information received from the camera 120. Carry out parking assistance control.

  Specifically, parking assist ECU 410 outputs image information received from camera 120 to display 182 and recognizes parking frame 250 (FIG. 2) and power transmission unit 220 based on the image information. Further, the parking assist ECU 410 recognizes the positional relationship (approximate distance and direction) between the vehicle 100 and the power transmission unit 220 based on the parking frame 250 and the power transmission unit 220 whose images have been recognized.

  And parking assistance ECU410 calculates the path | route to a target parking position based on the image recognition result of the parking frame 250 or the power transmission unit 220, and outputs a reverse command to vehicle ECU430 so that the vehicle 100 may reverse | retreat at a predetermined speed. Then, a steering command is output to steering ECU 420 so that vehicle 100 is guided to power transmission unit 220 in an appropriate direction.

  Further, when the vehicle 100 is guided to a predetermined position, the parking assist ECU 410 notifies the vehicle ECU 430 to that effect. As an example, a position where the power transmission unit 220 deviates by a predetermined amount from the shooting range of the camera 120 when the vehicle 100 approaches the power transmission unit 220 can be set as the predetermined position. Steering ECU 420 actually performs automatic steering control based on a steering command received from parking assist ECU 410.

  When normal traveling is performed, vehicle ECU 430 outputs a control command to motor control ECU 440 according to the operation state of the accelerator pedal / brake pedal, the traveling state of the vehicle, and the like.

  In the parking assist control, when receiving a reverse command from the parking assist ECU 410, the vehicle ECU 430 generates a signal for driving the motor generator 174 (FIG. 7) so that the vehicle retracts at a predetermined speed, and the motor control ECU 440 Output to.

  When the parking assist ECU 410 receives a notification indicating that the vehicle 100 has been guided to a predetermined position, the vehicle ECU 430 controls the speed of the vehicle 100 (deceleration / stop) based on the power reception status of the power reception unit 110. To do. Thereby, alignment with the power transmission unit 220 and the power receiving unit 110 is performed.

  Specifically, vehicle ECU 430 outputs a command for instructing deceleration or stop of vehicle 100 to motor control ECU 440 based on the estimation result of the distance between power transmission unit 220 and power reception unit 110. When the alignment of power transmission unit 220 and power reception unit 110 is completed and vehicle 100 stops, vehicle ECU 430 transmits a power supply command for charging power storage device 150 to power supply facility 200 via communication unit 130. At the same time, a command for instructing the start of charging of power storage device 150 is output to charging ECU 450.

  Motor control ECU 440 controls motor generators 172 and 174 and boost converter 162 based on a command from vehicle ECU 430. Specifically, motor control ECU 440 generates signals for driving motor generators 172 and 174 and boost converter 162 and outputs the signals to inverters 164 and 166 and boost converter 162, respectively.

  When charging ECU 450 receives a charging start command from vehicle ECU 430, charging ECU 450 activates signal SE2 output to system main relay SMR2, thereby turning on system main relay SMR2. Charging ECU 450 generates a signal for driving DC / DC converter 142 and outputs the signal to DC / DC converter 142. Thereby, charging of power storage device 150 is executed.

  FIG. 9 is an overall flowchart of parking support control executed by the control device 180 shown in FIG. Referring to FIG. 9, control device 180 determines whether PA switch 184 and power supply request switch 186 are turned on by the user (step S10). When it is determined that these switches are not turned on (NO in step S10), control device 180 shifts the process to step S60 without executing a series of subsequent processes.

  If it is determined in step S10 that PA switch 184 and power supply request switch 186 are turned on (YES in step S10), control device 180 executes parking support control based on image information of camera 120 (step S20). Details of the parking support control based on the image information will be described later.

  When the power transmission unit 220 enters the lower part of the vehicle 100 and the vehicle 100 approaches the power transmission unit 220 to a distance where the power transmission unit 220 cannot be recognized by the camera 120, the control device 180 changes the power reception state by the power reception unit 110. Based on the stop assistance control, the control is executed (step S30). Details of the stop support control based on the power reception status will be described later.

  Then, when the alignment between the power transmission unit 220 and the power receiving unit 110 of the vehicle 100 is completed by the stop support control, the control device 180 generates a stop command and stops the vehicle 100 (step S40). When vehicle 100 stops, control device 180 transmits a power supply command to power supply facility 200 and starts charging power storage device 150 by power supply facility 200 (step S50).

  FIG. 10 is a flowchart for explaining the processing procedure of the parking support control based on the image information shown in FIG. Referring to FIG. 10, control device 180 recognizes image of parking frame 250 based on the image taken by camera 120, and determines the parking position of vehicle 100 based on the recognition result (step S110). Then, the control device 180 calculates a route for guiding the vehicle 100 to the determined parking position, and executes the automatic steering operation by the parking assist ECU 410 and the steering ECU 420 based on the image information of the camera 120. (Step S120). During the execution of the automatic steering operation, the control device 180 updates the recognition of the parking frame 250 (step S130).

  Next, control device 180 determines whether or not the distance between power transmission unit 220 and vehicle 100 is smaller than a predetermined L1 (step S140). This L1 is set to a distance that allows the camera 120 to recognize the side surface 221 (FIG. 5) of the power transmission unit 220. When it is determined that the distance between power transmission unit 220 and vehicle 100 is equal to or greater than L1 (NO in step S140), the process returns to step S130.

  If it is determined in step S140 that the distance between power transmission unit 220 and vehicle 100 is smaller than L1 (YES in step S140), control device 180 uses power transmission unit based on the image captured by camera 120. The image of the side surface 221 of 220 is recognized (step S150). Then, control device 180 estimates the distance from vehicle 100 to power transmission unit 220 based on the image size (area) of side surface 221 of power transmission unit 220 that has been image-recognized (step S160).

  Next, control device 180 determines whether or not the distance between power transmission unit 220 and vehicle 100 is smaller than a predetermined L2 (<L1) (step S170). Note that L2 is set to a distance that allows the camera 120 to easily recognize the upper surface 222 (FIG. 5) rather than the side surface 221 of the power transmission unit 220. When it is determined that the distance between power transmission unit 220 and vehicle 100 is equal to or greater than L2 (NO in step S170), the process returns to step S150.

  If it is determined in step S170 that the distance between power transmission unit 220 and vehicle 100 is smaller than L2 (YES in step S170), control device 180 uses power transmission unit based on the image captured by camera 120. Image recognition is performed on the upper surface 222 of 220 (step S180). Then, control device 180 estimates the distance from vehicle 100 to power transmission unit 220 based on the size (area) of the image of upper surface 222 of power transmission unit 220 that has been image-recognized (step S190).

  Next, control device 180 determines whether or not the distance between power transmission unit 220 and vehicle 100 is smaller than a predetermined L3 (<L2) (step S200). Note that L3 is set to a distance at which the power transmission unit 220 cannot be recognized by the camera 120 when the power transmission unit 220 enters the lower part of the vehicle body of the vehicle 100.

  If it is determined in step S200 that the distance between power transmission unit 220 and vehicle 100 is L3 or more (NO in step S200), the process returns to step S180. On the other hand, when it is determined that the distance between power transmission unit 220 and vehicle 100 is smaller than L3 (YES in step S200), the process is returned to the main routine shown in FIG.

  FIG. 11 is a flowchart for explaining the processing procedure of the stop support control based on the power reception status shown in FIG. 9. Referring to FIG. 11, when the stop assistance control is started, control device 180 generates a deceleration command and decelerates vehicle 100 to a predetermined speed lower than the speed during the automatic steering operation (step S210). . Next, control device 180 estimates the distance to power transmission unit 220 using a map or the like prepared in advance based on the received voltage from power supply facility 200 indicated by the voltage detection value of voltage sensor 190 (FIG. 7). (Step S220).

  Then, control device 180 determines whether or not the power reception voltage detected by voltage sensor 190 exceeds a predetermined threshold value (step S230), and when it is determined that the power reception voltage exceeds the threshold value. (YES in step S230), the process is returned to the main routine shown in FIG.

  As described above, in this embodiment, when the vehicle 100 is far from the power supply facility 200, the parking frame 250 (FIG. 2) of the power supply facility 200 is recognized based on the image of the camera 120. Parking assistance control is executed so as to guide the vehicle 100 to the parking frame 250. Further, when the vehicle 100 approaches the power supply facility 200, the side surface 221 of the power transmission unit 220 is recognized based on the image of the camera 120, and when the vehicle 100 further approaches, the upper surface 222 of the power transmission unit 220 is recognized, and the vehicle 100 is guided to the power transmission unit 220. Parking assist control is executed as described above. As a result, the parking position can be reliably recognized based on the image of the camera 120 whether the distance from the vehicle 100 to the power supply facility 200 is long or short. Therefore, according to this embodiment, the parking accuracy of vehicle 100 with respect to power supply facility 200 is improved.

  As for the external appearance of the power transmission unit 220, it is only necessary that the side surface 221 and the upper surface 222 can be identified by the camera 120. For example, a checkered pattern as shown in FIG. 12 may be used instead of the external appearance shown in FIG. .

  In the above embodiment, when the vehicle 100 is far away from the power supply facility 200, the parking frame 250 (FIG. 2) of the power supply facility 200 is recognized based on the image of the camera 120, and the parking frame 250 is reached. The parking support control is executed so as to guide the vehicle 100, but the user can determine the parking position on the display 182 (FIG. 7), and the vehicle 100 is guided to the determined parking position. Also good.

  In the above description, the camera 120 is disposed at the rear of the vehicle on the assumption that the vehicle 100 is parked rearward with respect to the power supply facility 200. However, the vehicle 100 is parked forward with respect to the power supply facility 200. In this case, the camera 120 may be disposed in the front part of the vehicle.

  In the above description, the resonance method is used to transmit power from the power supply facility 200 to the vehicle 100 in a contactless manner, but the power transmission method from the power supply facility 200 to the vehicle 100 is not necessarily limited to the resonance method. Other non-contact power transmission methods such as power transmission using electromagnetic induction and power transmission using microwaves may be used.

  In the above description, the series / parallel type hybrid vehicle has been described as the vehicle 100, in which the power of the engine 176 is divided by the power split device 177 and can be transmitted to the drive wheels 178 and the motor generator 172. It can also be applied to other types of hybrid vehicles. That is, for example, a so-called series-type hybrid vehicle that uses the engine 176 only to drive the motor generator 172 and generates the driving force of the vehicle only by the motor generator 174, or regenerative energy among the kinetic energy generated by the engine 176 The present invention can also be applied to a hybrid vehicle in which only the electric energy is recovered, a motor assist type hybrid vehicle in which the motor assists the engine as the main power if necessary.

  Furthermore, the present invention can also be applied to an electric vehicle that does not include engine 176 and travels only by electric power, and a fuel cell vehicle that further includes a fuel cell as a DC power supply in addition to power storage device 150. The present invention is also applicable to a vehicle that does not include boost converter 162 or a vehicle that does not include DC / DC converter 142.

  In the above, the camera 120 corresponds to an embodiment of the “photographing device” in the present invention, and the parking assist ECU 410 and the steering ECU 420 of the control device 180 form an embodiment of the “guidance control unit” in the present invention. To do.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

  DESCRIPTION OF SYMBOLS 10 Vehicle electric power feeding system, 100 Vehicle, 110 Power receiving unit, 112,340 Secondary self-resonant coil, 114,350 Secondary coil, 120 Camera, 130,240 Communication part, 140 Rectifier, 142 DC / DC converter, 150 Power storage device, 162 Boost Converter, 164, 166 Inverter, 172, 174 Motor Generator, 176 Engine, 177 Power Divider, 178 Drive Wheel, 180 Controller, 182 Display, 184 PA Switch, 186 Power Supply Request Switch, 190 Voltage Sensor, 200 Power Supply Equipment , 210 power supply unit, 220 power transmission unit, 221 side surface, 222 upper surface, 310 high frequency power source, 320 primary coil, 330 primary self-resonant coil, 360 load, 410 parking assist ECU, 420 steer ECU, 430 Vehicle ECU, 440 Motor control ECU, 450 Charge ECU.

Claims (7)

  1. A parking assist device for a vehicle capable of receiving electric power transmitted from a power transmission unit of a power supply facility provided outside the vehicle in a non-contact manner by a power receiving unit and storing the electric power in a power storage device,
    A photographing device for photographing the outside of the vehicle;
    A guidance control unit for controlling the vehicle to guide the vehicle to the power transmission unit based on an image photographed by the photographing device;
    The power transmission unit has at least one side surface and an upper surface recognizable by the imaging device,
    The guidance control unit is configured to transmit the power based on an image of a side surface of the power transmission unit photographed by the photographing device when a distance between the power supply facility and the vehicle is larger than a predetermined first distance. Recognizing a unit, and when the distance between the power supply facility and the vehicle is equal to or less than the first distance, recognizing the power transmission unit based on an image of the upper surface of the power transmission unit photographed by the photographing device; Vehicle parking assist device.
  2.   The guidance control unit is capable of receiving power from the power supply facility when the distance between the power supply facility and the vehicle is greater than a predetermined second distance that is greater than the first distance. The parking assist device for a vehicle according to claim 1, wherein the vehicle is controlled so as to guide the vehicle to a parking frame indicating a parking position.
  3. The parking frame is displayed on the road surface,
    The said guidance control part recognizes the said parking frame based on the image image | photographed by the said imaging device, when the distance between the said electric power feeding installation and the said vehicle is larger than a said 2nd distance. The vehicle parking assistance device according to the description.
  4. A parking assist device for a vehicle capable of receiving electric power sent from a power transmission unit of a power supply facility provided outside the vehicle by a power receiving unit in a contactless manner and storing the electric power in a power storage device
    A photographing device for photographing the outside of the vehicle;
    A guidance control unit for controlling the vehicle to guide the vehicle to the power transmission unit based on an image photographed by the photographing device;
    A parking frame indicating a parking position where the vehicle can receive power from the power supply facility is displayed on the road surface,
    When the distance between the power supply facility and the vehicle is greater than a predetermined first distance, the guidance control unit may recognize the vehicle to the parking frame that is recognized based on an image captured by the imaging device. The vehicle is controlled to guide the vehicle, and when the distance between the power supply facility and the vehicle is equal to or less than the first distance, the power transmission unit is recognized based on an image photographed by the photographing device. Vehicle parking assist device.
  5.   When the distance between the power supply facility and the vehicle is less than or equal to the first distance and greater than a second distance that is smaller than the first distance, the guidance control unit is configured to capture the photographing apparatus. Recognizing the power transmission unit based on the image of the side surface of the power transmission unit taken by the camera, and when the distance between the power supply facility and the vehicle is equal to or less than the second distance, The vehicle parking assistance device according to claim 4, wherein the power transmission unit is recognized based on an image of an upper surface of the power transmission unit.
  6. The power transmission unit is:
    A feeding coil for sending power to the power receiving unit;
    A cover having at least one side surface and an upper surface provided so as to cover the power feeding coil from above and recognizable by the imaging device;
    6. The vehicle parking assistance device according to claim 1, wherein the guidance control unit recognizes the power transmission unit based on an image of the cover photographed by the photographing device. 7.
  7. The parking assistance device according to any one of claims 1 to 6,
    A power receiving unit configured to receive power sent from a power transmission unit of a power supply facility provided outside the vehicle in a contactless manner;
    A power storage device that stores the power received by the power receiving unit;
    An electric vehicle comprising: an electric motor that receives electric power from the power storage device and generates running torque.
JP2010138090A 2010-06-17 2010-06-17 Vehicle parking assist device and electric vehicle including the same Active JP5010715B2 (en)

Priority Applications (1)

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JP2010138090A JP5010715B2 (en) 2010-06-17 2010-06-17 Vehicle parking assist device and electric vehicle including the same
PCT/IB2011/001381 WO2011158107A1 (en) 2010-06-17 2011-06-16 Vehicle parking assist system and electric vehicle equipped with the same

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