WO2015076290A1 - Système de transmission et de réception d'énergie électrique sans contact - Google Patents

Système de transmission et de réception d'énergie électrique sans contact Download PDF

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Publication number
WO2015076290A1
WO2015076290A1 PCT/JP2014/080616 JP2014080616W WO2015076290A1 WO 2015076290 A1 WO2015076290 A1 WO 2015076290A1 JP 2014080616 W JP2014080616 W JP 2014080616W WO 2015076290 A1 WO2015076290 A1 WO 2015076290A1
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Prior art keywords
power
power transmission
vehicle
unit
voltage
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PCT/JP2014/080616
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English (en)
Japanese (ja)
Inventor
谷口　聡
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トヨタ自動車株式会社
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • 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
    • B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
    • 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
    • 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
    • B60L53/37—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles using optical position determination, e.g. using cameras
    • 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
    • B60L53/38—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by 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
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/66—Data transfer between charging stations and vehicles
    • B60L53/665—Methods related to measuring, billing or payment
    • 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
    • H02J50/10—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
    • H02J50/80—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • 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
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Definitions

  • This invention relates to a non-contact power transmission / reception system.
  • Patent Documents 1 to 7 a power receiving device and a power transmitting device that transmit and receive power in a contactless manner are known.
  • a weak power is received from a power transmission device when the on-vehicle power reception device is aligned with a power transmission device installed in a parking lot or the like. And the vehicle is guided to the power transmission device based on the power reception voltage at that time.
  • the inventor of the present application has found that the alignment sensitivity changes depending on the power control method during test transmission.
  • An object of the present invention is to provide a non-contact power transmission / reception system that facilitates alignment at the time of non-contact power transmission / reception by appropriately controlling transmission power at the time of alignment between the power transmission unit and the power reception unit. .
  • the present invention is a non-contact power transmission / reception system including a vehicle equipped with a power receiving unit configured to be able to receive power in a non-contact manner, and a power transmission device that transmits power from outside the vehicle to the power receiving unit.
  • the power transmission device performs test power transmission to confirm the power reception strength at the power receiving unit when moving the vehicle and aligning the position of the power receiving unit with the power transmission unit of the power transmission device.
  • Control is performed to perform power transmission, and power transmission is performed by performing power control during main power transmission after alignment is completed.
  • the voltage control has a characteristic that the sensitivity becomes sharper near the peak when the vehicle is moved than the power control.
  • the peak detection sensitivity at the time of alignment increases. For this reason, when the power receiving device and the power transmitting device are aligned, the difference between the power receiving voltage when the power is correctly aligned and the power receiving voltage when the power is misaligned is large, and whether or not the power is shifted. Is easier to detect.
  • FIG. 1 is an overall configuration diagram of a non-contact power transmission / reception system as an example of an embodiment of the present invention. It is a figure for demonstrating a mode that a vehicle moves and position alignment of a power receiving part and a power transmission part is implemented. It is a flowchart for demonstrating the outline of the process which a vehicle and a charging stand perform when performing non-contact electric power feeding. It is the figure which compared the change of the secondary side output voltage at the time of transmitting with constant voltage control, and transmitting with constant power control.
  • FIG. 1 is an overall configuration diagram of a non-contact power transmission / reception system as an example of an embodiment of the present invention.
  • a contactless power transmission / reception system includes a vehicle 10 equipped with a power receiving unit 100 configured to be capable of receiving power without contact, and a power transmission device 20 that transmits power to the power receiving unit 100 from outside the vehicle. Is provided.
  • the power transmission device 20 performs a test power transmission for confirming the power reception strength at the power receiving unit 100 when the vehicle is moved and alignment is performed to align the position of the power receiving unit 100 with the power transmission unit 700 of the power transmission device 20.
  • voltage control is performed to perform power transmission, and during main transmission after alignment is completed, power control is performed to perform power transmission.
  • the inventor of the present application has found that the voltage control has a characteristic that the sensitivity becomes sharper near the peak when the vehicle is moved than the power control. Therefore, in test transmission before transmitting power to the vehicle load, voltage control advantageous for alignment is executed, and in full-scale power transmission when transmitting power to the vehicle load, power control that can transmit the required power is performed. Decided to do. Thereby, alignment between a vehicle and a power transmission apparatus becomes easy.
  • the power transmission system includes a vehicle 10 and a power transmission device 20.
  • Vehicle 10 further includes a filter circuit 150, a rectifying unit 200, a power storage device 300, and a power generation device 400.
  • the power receiving unit 100 includes a coil for receiving power (alternating current) output from the power transmitting unit 700 of the power transmitting device 20 in a non-contact manner.
  • the power receiving unit 100 outputs the received power to the rectifying unit 200.
  • the power transmission unit 700 of the power transmission device 20 is provided on the ground surface or in the ground, and the power reception unit 100 is disposed in the lower part of the vehicle body.
  • positioning location of the power receiving part 100 is not limited to this.
  • the power transmission device 20 is provided above the vehicle, the power receiving unit 100 may be provided in the upper part of the vehicle body.
  • the rectifying unit 200 rectifies the AC power received by the power receiving unit 100 and outputs the rectified power to the power storage device 300.
  • the filter circuit 150 is provided between the power reception unit 100 and the rectification unit 200, and suppresses harmonic noise generated when receiving power from the power transmission device 20.
  • the filter circuit 150 is configured by an LC filter including an inductor and a capacitor, for example.
  • the power storage device 300 is a rechargeable DC power source, and is constituted by a secondary battery such as a lithium ion battery or a nickel metal hydride battery.
  • the voltage of power storage device 300 is, for example, about 200V.
  • the power storage device 300 stores power output from the rectifying unit 200 and also stores power generated by the power generation device 400. Then, power storage device 300 supplies the stored power to power generation device 400. Note that a large-capacity capacitor can also be used as the power storage device 300.
  • a DC-DC converter that adjusts the output voltage of the rectifying unit 200 may be provided between the rectifying unit 200 and the power storage device 300.
  • the power generation device 400 generates the driving force for driving the vehicle 10 using the electric power stored in the power storage device 300.
  • power generation device 400 includes, for example, an inverter that receives electric power from power storage device 300, a motor driven by the inverter, a drive wheel driven by the motor, and the like.
  • Power generation device 400 may include a generator for charging power storage device 300 and an engine capable of driving the generator.
  • the vehicle ECU 500 includes a CPU (Central Processing Unit), a storage device, an input / output buffer, and the like (none of which are shown), inputs signals from various sensors and outputs control signals to each device. Control each device in. As an example, vehicle ECU 500 executes traveling control of vehicle 10 and charging control of power storage device 300. Note that these controls are not limited to processing by software, and can be processed by dedicated hardware (electronic circuit).
  • a relay 210 is provided between the rectifying unit 200 and the power storage device 300. Relay 210 is turned on by vehicle ECU 500 when power storage device 300 is charged by power transmission device 20.
  • a system main relay (SMR) 310 is provided between the power storage device 300 and the power generation device 400. SMR 310 is turned on by vehicle ECU 500 when activation of power generation device 400 is requested.
  • Vehicle ECU 500 communicates with power transmission device 20 using communication device 510 when power storage device 300 is charged by power transmission device 20, and transmits information such as charging start / stop and power reception status of vehicle 10 with power transmission device 20. Interact.
  • FIG. 2 is a diagram for explaining a state in which the vehicle moves and the power receiving unit and the power transmission unit are aligned.
  • the vehicle or the power transmission device determines whether the power receiving unit 100 is positioned with respect to the power transmitting unit 700 based on the in-vehicle camera (not shown) or the power receiving strength in the test power transmission in the power transmitting unit 700.
  • the notification device 520 notifies the user.
  • the user moves the vehicle 10 based on the information obtained from the notification device 520 so that the positional relationship between the power receiving unit 100 and the power transmitting unit 700 is a favorable positional relationship for power transmission and reception.
  • the user does not necessarily have to perform a steering wheel operation or an accelerator operation, and the vehicle 10 may automatically move and adjust the position, and the user may watch it with the notification device 520.
  • power transmission device 20 includes a power supply unit 600, a filter circuit 610, a power transmission unit 700, and a power supply ECU 800.
  • the power supply unit 600 receives power from an external power supply 900 such as a commercial power supply and generates AC power having a predetermined transmission frequency.
  • the power transmission unit 700 includes a coil for transmitting power to the power reception unit 100 of the vehicle 10 in a contactless manner.
  • the power transmission unit 700 receives AC power having a transmission frequency from the power supply unit 600 and transmits the AC power to the power reception unit 100 of the vehicle 10 in a non-contact manner via an electromagnetic field generated around the power transmission unit 700.
  • Filter circuit 610 is provided between power supply unit 600 and power transmission unit 700 and suppresses harmonic noise generated from power supply unit 600.
  • the filter circuit 610 is configured by an LC filter including an inductor and a capacitor.
  • the power supply ECU 800 includes a CPU, a storage device, an input / output buffer, and the like (all not shown), and inputs signals from various sensors and outputs control signals to each device. Take control. As an example, power supply ECU 800 performs switching control of power supply unit 600 such that power supply unit 600 generates AC power having a transmission frequency. Note that these controls are not limited to processing by software, and can be processed by dedicated hardware (electronic circuit).
  • the power supply ECU 800 communicates with the vehicle 10 using the communication device 810 during power transmission to the vehicle 10 and exchanges information such as charging start / stop and the power reception status of the vehicle 10 with the vehicle 10.
  • Each of power transmission unit 700 and power reception unit 100 of vehicle 10 includes a coil and a capacitor, and is designed to resonate at a transmission frequency.
  • the Q value indicating the resonance intensity of the power transmission unit 700 and the power reception unit 100 is preferably 100 or more.
  • an insulating transformer may be provided between the power transmission unit 700 and the power supply unit 600 (for example, between the power transmission unit 700 and the filter circuit 610). Also in vehicle 10, an insulating transformer may be provided between power reception unit 100 and rectification unit 200 (for example, between power reception unit 100 and filter circuit 150).
  • test transmission is performed with weak power that is lower than that of full-scale transmission.
  • the relay 202 is turned on, and the vehicle ECU 500 detects the received voltage VR generated at both ends of the detection resistor 201. Since this voltage is smaller than that during full-scale power transmission, relay 210 is controlled to be turned off during test power transmission so that it is not affected by power storage device 300 during detection.
  • FIG. 3 is a flowchart for explaining an outline of processing executed by the vehicle and the charging station when performing non-contact power feeding.
  • step S1 Vehicle ECU 500 starts communication with power transmission device 20 using communication device 510.
  • step S11 when the process is started in step S11, the power transmission device side is in a standby state in step S11 until communication is made from the vehicle side, and communication is started when communication start is requested from the vehicle.
  • a distance confirmation process is executed in step S2 following the communication start process in step S1.
  • the distance confirmation process is a process of performing alignment by moving the vehicle while confirming the distance between the power reception unit 100 and the power transmission unit 700.
  • an IPA (Intelligent Parking Assist) system using an in-vehicle camera (not shown) is used.
  • the vehicle ECU 500 requests the power transmission device to perform test power transmission for alignment.
  • the power transmission device side waits for a test power transmission request to be turned on in step S12 following step S11.
  • the vehicle ECU 500 when requesting transmission of weak power, sets the relay 202 to the ON state. Then, a test power transmission request is transmitted to the power transmission device side. Then, the power transmission apparatus detects that the test power transmission request is set to the on state and starts test power transmission.
  • the test transmission power may be the same as that transmitted when the charging is started, but is preferably set to a power (weak power) that is weaker than the power transmitted during full-scale power transmission.
  • the secondary voltage (power reception voltage of the vehicle 10) is the distance between the power transmission unit 700 of the power transmission device 20 and the power reception unit 100 of the vehicle 10. It changes according to L (FIG. 2). Therefore, a map or the like is created by measuring the relationship between the primary side voltage and the secondary side voltage in advance, and the power transmission unit 700 and the power reception unit 100 are connected based on the detected value of the voltage VR indicating the secondary side voltage. The distance between them can be detected. In addition to the voltage VR, the distance may be detected by current and power on the power receiving side, power transmission current on the power transmission side, and power transmission power.
  • the inventor of the present application executes the voltage control for controlling the transmission voltage to the target value at the time of the test transmission at the time of alignment, rather than executing the power control for controlling the transmission power to the target value. We found that the difference in the received voltage in the vicinity where the alignment was good increased.
  • the transmitted power when charging, the transmitted power must be controlled so as not to exceed the acceptable power (Win) of the power storage device 300 (for example, a nickel metal hydride battery or a lithium ion battery). It is common to perform power control. However, during the test transmission, the transmitted power is weak and does not charge the power storage device 300. Therefore, if the relay 210 is turned off, it is not necessary to consider the limitation of Win.
  • Win acceptable power
  • FIG. 4 is a diagram comparing changes in the secondary output voltage when power is transmitted with constant voltage control and when power is transmitted with constant power control.
  • the vertical axis represents the secondary output voltage (V)
  • the horizontal axis represents the coupling coefficient between the power reception unit 100 and the power transmission unit 700.
  • the secondary output voltage (V) corresponds to the voltage VR detected by the resistor 201 in FIG.
  • the coupling coefficient changes corresponding to the distance between the primary coil of the power transmission unit 700 and the secondary coil of the power reception unit 100 (distance between coils or displacement).
  • Line VV shows a change in coupling coefficient and a change in secondary output voltage during constant voltage control
  • line VP shows a change in coupling coefficient and a change in secondary output voltage during constant voltage control.
  • the sensitivity of the output voltage to the coupling coefficient in the vicinity of the peak of the secondary output voltage is larger in the line VP than in the line VV. This is because the output voltage at the position of the alignment OK and the position of the alignment NG is near the boundary between the position of the alignment OK and the position of the alignment NG when the constant voltage control is performed than when the constant power control is performed. It means that the difference is large.
  • the received voltage VR increases.
  • the received voltage VR starts to decrease.
  • the vehicle ECU 500 determines the voltage VR based on the determination threshold value determined by measuring the relationship between the distance and the voltage in advance, and determines the vehicle stop position.
  • step S2 and step S12 the power of the test transmission is received by the power receiving unit 100, and the parking position of the vehicle is determined while checking the distance based on the voltage VR.
  • the shift range is shifted to the P range by a user operation or the vehicle ECU 500, and on the vehicle side, the process proceeds from step S2 to step S3.
  • vehicle ECU 500 turns on relay 210 and requests the power transmission device to perform full-scale power transmission for charging.
  • the power transmission control method is switched from voltage control to power control in step S13 on the power transmission device side.
  • step S4 on the vehicle side
  • step S14 on the power transmission apparatus side
  • step S4 vehicle ECU 500 transmits acceptable power Win to power supply ECU 800 based on the state of charge (SOC) and temperature of power storage device 300.
  • step S14 power supply ECU 800 performs constant power control on power supply unit 600 so as not to exceed power Win and performs power transmission.
  • step S4 when predetermined charging end conditions (for example, power storage device 300 is fully charged, a specified charging end time has arrived, a user has performed a charging end operation, etc.) are satisfied, vehicle ECU 500 The ECU requests the ECU to stop power transmission, and the charging process ends in steps S5 and S15.
  • predetermined charging end conditions for example, power storage device 300 is fully charged, a specified charging end time has arrived, a user has performed a charging end operation, etc.
  • step S12 in FIG. 3 in the test power transmission before transmitting power to the vehicle load (step S12 in FIG. 3), voltage control advantageous for alignment is executed, and power is transmitted to the vehicle load.
  • step S14 in FIG. 3 power control capable of transmitting necessary power is executed. Thereby, alignment between a vehicle and a power transmission apparatus becomes easy.

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

Abstract

L'invention porte sur un système de transmission et de réception d'énergie électrique sans contact qui comprend un véhicule (10) pourvu d'une unité de réception d'énergie (100), configurée afin de pouvoir recevoir de l'énergie électrique sans contact, et d'un dispositif de transmission d'énergie (20) pour transmettre de l'énergie électrique à l'unité de réception d'énergie (100) depuis l'extérieur du véhicule. Lorsqu'un alignement de positions est effectué dans lequel le véhicule est déplacé afin d'aligner la position de l'unité de réception d'énergie (100) sur une unité de transmission d'énergie (700) du dispositif de transmission d'énergie (20), le dispositif de transmission d'énergie (20) effectue une transmission d'énergie d'essai pour vérifier l'intensité de réception d'énergie au niveau de l'unité de réception d'énergie (100) et effectue une commande de tension tout en transmettant de l'énergie pendant la transmission d'énergie d'essai. Le dispositif de transmission d'énergie (20) exécute une commande d'énergie tout en transmettant de l'énergie pendant une transmission d'énergie normale après l'achèvement de l'alignement de positions.
PCT/JP2014/080616 2013-11-20 2014-11-19 Système de transmission et de réception d'énergie électrique sans contact WO2015076290A1 (fr)

Applications Claiming Priority (2)

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JP2013239810A JP2015100230A (ja) 2013-11-20 2013-11-20 非接触送受電システム
JP2013-239810 2013-11-20

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WO2015076290A1 true WO2015076290A1 (fr) 2015-05-28

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Cited By (1)

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CN109195832A (zh) * 2016-04-07 2019-01-11 西门子移动有限公司 位置确定系统

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6464951B2 (ja) * 2015-07-28 2019-02-06 株式会社デンソー 駐車支援システム
CN106532973A (zh) * 2016-10-11 2017-03-22 中国科学院电工研究所 一种电动汽车无线充电定位装置
JP7036222B2 (ja) 2018-10-05 2022-03-15 株式会社Ihi 位置ずれ検出装置およびコイル装置
JP7243450B2 (ja) * 2019-05-27 2023-03-22 株式会社デンソー 走行中給電システム
JP7386071B2 (ja) * 2019-12-20 2023-11-24 株式会社Subaru 車両制御装置および車両

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WO2010131346A1 (fr) * 2009-05-14 2010-11-18 トヨタ自動車株式会社 Dispositif de réception d'énergie sans contact et véhicule équipé de ce dernier
JP2012080770A (ja) * 2010-03-10 2012-04-19 Toyota Motor Corp 車両、および車両の駐車支援装置
JP2013110822A (ja) * 2011-11-18 2013-06-06 Toyota Motor Corp 電力伝送システム、車両、および給電設備

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010131346A1 (fr) * 2009-05-14 2010-11-18 トヨタ自動車株式会社 Dispositif de réception d'énergie sans contact et véhicule équipé de ce dernier
JP2012080770A (ja) * 2010-03-10 2012-04-19 Toyota Motor Corp 車両、および車両の駐車支援装置
JP2013110822A (ja) * 2011-11-18 2013-06-06 Toyota Motor Corp 電力伝送システム、車両、および給電設備

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109195832A (zh) * 2016-04-07 2019-01-11 西门子移动有限公司 位置确定系统

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