WO2013061617A1 - Dispositif de transmission d'énergie électrique sans contact et dispositif d'alimentation électrique ainsi que dispositif de réception d'électricité utilisant celui-ci - Google Patents

Dispositif de transmission d'énergie électrique sans contact et dispositif d'alimentation électrique ainsi que dispositif de réception d'électricité utilisant celui-ci Download PDF

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Publication number
WO2013061617A1
WO2013061617A1 PCT/JP2012/006932 JP2012006932W WO2013061617A1 WO 2013061617 A1 WO2013061617 A1 WO 2013061617A1 JP 2012006932 W JP2012006932 W JP 2012006932W WO 2013061617 A1 WO2013061617 A1 WO 2013061617A1
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WIPO (PCT)
Prior art keywords
power
power transmission
capacitance sensor
transmission device
cover
Prior art date
Application number
PCT/JP2012/006932
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English (en)
Japanese (ja)
Inventor
柏本　隆
芳弘 阪本
大森　義治
秀樹 定方
裕明 栗原
藤田　篤志
Original Assignee
パナソニック株式会社
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Publication of WO2013061617A1 publication Critical patent/WO2013061617A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M7/00—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
    • B60M7/003—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway for vehicles using stored power (e.g. charging stations)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • 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
    • B60L53/124—Detection or removal of foreign bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • B60L53/126—Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • 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
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • the present invention relates to a contactless power transmission device suitable for contactless power transmission, and more particularly to a contactless power transmission device used for charging an electric propulsion vehicle such as an electric vehicle or a plug-in hybrid vehicle.
  • FIG. 8 is a diagram showing the configuration of the non-contact power transmission device and the periphery of the device disclosed in Patent Document 1.
  • the non-contact power transmission device 101 includes a power feeding device (primary side) F connected to a power panel of a ground-side power source 104, and a power receiving device (secondary side) G mounted on an electric vehicle or train. It has. And at the time of electric power feeding, the electric power feeder F and the receiving device G are arrange
  • the power receiving device G is connected to, for example, the in-vehicle battery 105, and the electric power transmitted from the power feeding device F to the power receiving device G is charged in the in-vehicle battery 105.
  • the in-vehicle motor 106 is driven by the electric power stored in the in-vehicle battery 105.
  • the wireless communication device 107 performs necessary information exchange between the power feeding device F and the power receiving device G during processing related to contactless power feeding.
  • FIG. 9 is a cross-sectional view of the power feeding device F (power receiving device G) of FIG.
  • FIG. 9A is a plan cross-sectional view of the power feeding device F (power receiving device G)
  • FIG. 9B is a side cross-sectional view of the power feeding device F (power receiving device G).
  • the power feeding device F includes a primary coil 102, a primary magnetic core 108, a back plate 110, and a cover 111.
  • the power receiving device G includes a secondary coil 103, a secondary magnetic core 109, a back plate 110, and a cover 111.
  • the surfaces of the primary coil 102 and the primary magnetic core 108 of the power feeding device F and the surfaces of the secondary coil 103 and the secondary magnetic core 109 of the power receiving device G are covered and fixed by the mold resin 112 mixed with the foam material 113. ing.
  • the mold resin 112 is filled between the back plate 110 and the cover 111 of the power feeding device F (power receiving device G), and the primary coil 102 (secondary coil 103) and the primary magnetic core 108 (secondary magnetic core) inside.
  • the surface of the core 109) is fixedly covered with a mold resin 112.
  • the mold resin 112 is made of, for example, silicon resin, and is fixed as described above, thereby fixing the position of the primary coil 102 (secondary coil 103), ensuring its mechanical strength and exhibiting a heat dissipation function. To do. That is, in the primary coil 102 (secondary coil 103), an exciting current flows and heat is generated by Joule heat, but is radiated and cooled by heat conduction of the mold resin 112.
  • a sensor for detecting a foreign matter that has entered between the power feeding device and the power receiving device is provided.
  • a temperature sensor for detecting overheating of a metal foreign object is used.
  • an abnormality such as a failure occurs in the sensor that detects foreign matter, it is not possible to detect overheating of the foreign matter that has entered.
  • the present invention can reliably detect the intrusion of foreign matter around the cover of the power supply device or the power reception device, particularly between the power supply device (primary coil) and the power reception device (secondary coil).
  • An object of the present invention is to provide a non-contact power transmission device.
  • the non-contact power transmission device performs power transmission using electromagnetic induction between the power feeding device and the power receiving device.
  • the power supply apparatus includes a base, a primary coil that is provided on the base and generates magnetic flux, and a cover that is attached to the base and covers the primary coil.
  • the non-contact power transmission device includes a capacitance sensor that detects foreign matter around the cover, and a monitoring unit that monitors a signal detected by the capacitance sensor.
  • the non-contact power transmission device includes a capacitance sensor that detects foreign matter around the cover and a monitoring unit that monitors a signal detected by the capacitance sensor. It is possible to operate the capacitance sensor before starting the power feeding operation by the power feeding device, and to check the normal operation of the capacitance sensor by the monitoring unit. Thereby, it can prevent that the electric power feeding operation
  • the non-contact power transmission device performs power transmission using electromagnetic induction between the power feeding device and the power receiving device.
  • the power receiving device includes a base body, a secondary coil that is provided on the base body and generates an electromotive force according to the magnetic flux received from the power feeding device, and a cover that is attached to the base body and covers the secondary coil And.
  • the non-contact power transmission device includes a capacitance sensor that detects foreign matter around the cover, and a monitoring unit that monitors a signal detected by the capacitance sensor.
  • the non-contact power transmission device includes a capacitance sensor that detects foreign matter around the cover and a monitoring unit that monitors a signal detected by the capacitance sensor. It is possible to operate the capacitance sensor before starting the power feeding operation by the power feeding device, and to check the normal operation of the capacitance sensor by the monitoring unit. Thereby, it can prevent that the electric power feeding operation
  • a power supply device that supplies power using electromagnetic induction to a power receiving device of a non-contact power transmission device disposed opposite to the power receiving device is provided on a base, the base, and a magnetic flux A cover that is attached to the base and covers the primary coil, a capacitance sensor that detects foreign matter around the cover, and a monitoring unit that monitors a signal detected by the capacitance sensor It has.
  • a power receiving device that receives power transmitted from a power feeding device of a non-contact power transmission device is provided on a base and the base, and is generated according to a magnetic flux received from the power feeding device.
  • a secondary coil that generates electric power, a cover that is attached to the base and covers the secondary coil, a capacitance sensor that detects foreign matter around the cover, and a signal detected by the capacitance sensor are monitored. And a monitoring unit.
  • the non-contact power transmission device can reliably detect the intrusion of foreign matter around the cover of the power feeding device or the power receiving device.
  • FIG. 2 is an external view showing a state where the vehicle is installed in a parking space when the power feeding device of the non-contact power transmission device shown in FIG. 1 is laid on the ground and the power receiving device is mounted on the vehicle.
  • It is a block diagram which shows the structural example of a foreign material detection part.
  • A), (B), (C) It is a figure which shows an example of the sectional side view of a feeding coil unit.
  • It is a flowchart which shows an example of the non-contact electric power transmission control and foreign material detection control which concern on this embodiment. It is a flowchart which shows an example of a foreign material detection part abnormality process.
  • FIG. 1 is a diagram illustrating a configuration example of a non-contact power transmission apparatus according to an embodiment.
  • FIG. 2 is an external view of a state where the electric propulsion vehicle is installed in the parking space.
  • the non-contact power transmission device receives a voltage from a commercial power supply 6 and generates a magnetic field, and a power receiving device 4 that receives a magnetic field from the power supply device 2 and receives power as power. And.
  • the power supply device 2 generates a magnetic flux (magnetic field) by receiving a power supply box 8 as a power supply unit connected to the commercial power supply 6, an inverter unit 10 that receives the output of the power supply box 8, and an output from the inverter unit 10.
  • the feeding coil unit 12 having a primary coil 44 (indicated as a coil unit in FIG. 1), a capacitance sensor, a foreign matter detection unit 14 for detecting foreign matter, and a monitoring unit 17 to be described later are provided.
  • a power supply control unit for example, a microcomputer; expressed as a control unit in FIG. 1) 16 for controlling the power supply device 2 is provided.
  • the commercial power source 6 is a 200V commercial power source which is a low frequency AC power source, for example.
  • the power receiving device 4 generates an electromotive force according to the magnetic flux received from the power feeding coil unit 12 and has a power receiving coil unit 18 having a secondary coil 45 (denoted as a coil unit in FIG. 1), and an output of the power receiving coil unit 18.
  • a rectifying unit 20 for receiving, a battery 22 as a load for receiving an output from the rectifying unit 20, and a power receiving control unit (for example, a microcomputer; expressed as a control unit in FIG. 1) 24 for controlling the power receiving device 4 are provided.
  • the primary coil 44 and the secondary coil 45 may be plate coils or solenoid coils. Further, the primary coil 44 and the secondary coil 45 are preferably formed of a metal having high conductivity, for example, copper. However, another material such as silver or aluminum may be used.
  • FIG. 2 shows an example in which the power supply coil unit 12 is laid on the ground and supplies power to the power receiving device 4 mounted on the electric propulsion vehicle.
  • the power supply coil unit 12 is laid on the ground, and the power supply box 8 is erected at a position separated from the power supply coil unit 12 by a predetermined distance, for example.
  • the power receiving coil unit 18 is attached to, for example, a vehicle body bottom (for example, a chassis).
  • the power feeding control unit 16 controls the drive of the inverter unit 10, thereby generating a high frequency between the power feeding coil unit 12 and the power receiving coil unit 18. Create an electromagnetic field.
  • the power receiving device 4 takes out electric power from the high frequency electromagnetic field and charges the battery 22 with the taken out electric power.
  • the power reception control unit 24 determines a power command value according to the detected remaining voltage of the battery 22.
  • the power supply control unit 16 receives the power command value determined by the power reception control unit 24 via wireless communication.
  • the power supply control unit 16 compares the power supply detected from the power supply coil unit 12 with the power command value received from the power reception control unit 24, and drives the inverter unit 10 so that the value of the power supply power becomes the power command value. .
  • the power reception control unit 24 detects the received power during power supply, and changes the power command value transmitted to the power supply control unit 16 so that the battery 22 is not overcurrent or overvoltage.
  • the foreign object detector 14 detects whether there is a foreign object around the cover.
  • the “periphery of the cover” refers to a region through which magnetic lines of force generated by the power feeding device 2 pass during power transmission, such as a high-frequency electromagnetic field region and the vicinity thereof. It shall refer to the area where temperature is generated.
  • the foreign object detection unit 14 is provided in the power feeding coil unit 12 as shown in FIG.
  • the place where the foreign object detection unit 14 is provided is not limited to this.
  • it may be provided outside the feeding coil unit 12 or may be provided in the power receiving device 4.
  • the power receiving coil unit 18 may be provided.
  • the “foreign matter” in the present disclosure is an object that may enter the periphery of the cover, and in particular, the contactless charging device (in this embodiment, the power feeding device 2 or the power receiving device) is heated by an electromagnetic field. 4) Metal pieces that may cause damage.
  • FIG. 3 is a block diagram illustrating a configuration example of the foreign matter detection unit 14.
  • FIG. 4 is a diagram illustrating an example of a partial cross-sectional view of the power feeding coil unit 12 of the power feeding device 2.
  • the feeding coil unit 12 includes a substrate 42 as a base, a primary coil 44 provided on the substrate 42, and attached to the substrate 42.
  • the cover 40 which covers a side and the foreign material detection part 14 installed in the back surface of the cover 40 are provided. As described above, the cover 40 is attached to the substrate 42 so as to cover the upper side and the side of the primary coil 44, whereby the primary coil 44 disposed on the substrate 42 can be protected.
  • the foreign matter detection unit 14 includes an electrode 30, a voltage supply unit 32, a C / V conversion unit 34, and a signal processing unit 36.
  • the monitoring unit 17 receives the signal processed by the signal processing unit 36 and determines whether the capacitance sensor is operating normally by monitoring whether or not the signal is changed. is doing.
  • the position where the foreign object detection unit 14 is installed is not limited to the back surface of the cover 40, and may be installed at a position away from the back surface of the cover 40, for example.
  • the electrode 30 of the foreign matter detection unit 14 is installed on the back surface of the cover 40 so that the capacitance between the electrode 30 and the foreign matter 38 that has entered the cover 40 can be measured and protected from the outside.
  • the electrode 30 of the foreign matter detection unit 14 is preferably installed between the cover 40 and the primary coil 44, and is preferably installed at a location near the surface of the cover 40.
  • on the cover in the present disclosure means on the outer surface of the cover or above the outer surface of the cover.
  • the foreign matter detection unit 14 or the electrode 30 of the foreign matter detection unit 14 may be incorporated in the cover 40 as long as it is not exposed to the outside. Thereby, the distance with the foreign material which invaded on the cover 40 is shortened, and foreign material detection can be performed with higher accuracy.
  • the foreign substance detection part 14 or the electrode 30 of the foreign substance detection part 14 may be installed on the upper side of the cover 40 and on the rear side as shown in FIG. As a result, foreign matter can be detected with high accuracy even around the cover on the side of the cover 40.
  • FIGS. 4A to 4C show an example in which the foreign object detection unit 14 is provided in the power feeding device 2, but the foreign object detection unit 14 may be provided in the power receiving device 4. It is the same. Specifically, the power receiving coil unit 18 of the power receiving device 4 is provided with a secondary coil 45 in place of the primary coil 44 in FIGS. 4A to 4C. Other configurations are the same as those shown in FIGS. 4A to 4C.
  • the voltage supply unit 32 is connected to the electrode 30 and applies a predetermined potential with respect to the ground (GND) potential to the electrode 30.
  • GND ground
  • the electrostatic capacitance C1 is between the electrode 30 and the foreign matter 38. appear.
  • the capacitance C1 is expressed by Equation 1.
  • Equation 1 ⁇ 0 is the dielectric constant of vacuum, ⁇ r is the relative dielectric constant between the electrode 30 and the foreign material 38 (in FIG. 4A, the relative dielectric constant of the cover), and S is the opposite electrode of the electrode 30 and the foreign material 38.
  • the minimum area, d is the distance between the electrode 30 and the foreign material 38. Therefore, the foreign matter detection unit 14 can confirm that the foreign matter 38 has approached the electrode 30 based on the variation in the capacitance C1 between the electrode 30 and the foreign matter 38.
  • the C / V conversion unit 34 converts the capacitance C1 into a voltage value.
  • the C / V conversion unit 34 converts the capacitance value of the capacitance C1 + C2 into a corresponding voltage value.
  • the signal processing unit 36 transmits a signal corresponding to the voltage value converted by the C / V conversion unit 34, that is, a signal corresponding to the measured capacitance value to the monitoring unit 17.
  • contactless power transmission control according to the present embodiment will be described with reference to the flowchart of FIG. Specifically, the control related to the determination of the normal operation of the foreign object detection unit 14 by the monitoring unit 17 and the control related to power transmission including the foreign object intrusion process will be described.
  • FIG. 2 it is assumed that the power feeding device 2 is laid on the ground and the power receiving device 4 is mounted on the vehicle, and the power feeding device 2 and the power receiving device 4 face each other before the start of step S1. Make it not exist. That is, it is assumed that the vehicle needs to be moved in order to supply power (the power receiving device 4 faces the power supply device 2).
  • the vehicle or the power reception control unit 24 is configured to wirelessly communicate between the power reception device 4 and the power supply device 2 until they stop. It is assumed that a trigger signal including a control command is transmitted to the power supply control unit 16.
  • the vehicle or the power reception control unit 24 transmits a vehicle approach trigger signal to the power supply control unit 16 via wireless communication (S1).
  • the power supply control unit 16 receives a control command included in the trigger signal from the vehicle or the power reception control unit 24, the power supply control unit 16 starts the capacitance measuring operation by the foreign matter detection unit 14.
  • the monitoring unit 17 starts monitoring the change in the signal received from the foreign object detection unit 14 (S2).
  • the vehicle body and the power receiving device 4 mounted on the vehicle body approach the foreign object detection unit 14 the surrounding environment is changed by the power receiving coil unit 18 and the like included in the vehicle body and the power receiving device 4, A change in capacitive coupling occurs.
  • the foreign object detection unit 14 measures the capacitance when the foreign object 38 is not present on the cover 40 of the power feeding device 2 in a state where the vehicle is stopped, for example, and stores the capacitance as an initial value.
  • the power supply control unit 16 starts power supply from the power supply coil unit 12 to the power reception coil unit 18 by instructing the inverter unit 10 to start power transmission.
  • the flow proceeds to S6.
  • the foreign material detection part 14 shall measure an initial value in the state which the vehicle stopped, it is not limited to this.
  • the foreign matter detection unit 14 may hold a predetermined initial value in advance and use the held value as the initial value, or may measure the initial value at a timing other than the above before the start of power feeding. It doesn't matter.
  • FIG. 6 is a flowchart showing an example of the foreign object detection unit abnormality process.
  • the power supply device 2 first notifies the abnormality of the abnormality detection unit 14 by a notification means such as a display or sound.
  • notification is made by the speaker 46 shown in FIG. 2 (S21).
  • the power supply control unit 16 stops the function of the power supply apparatus 2 (S22), and ends the foreign matter detection unit abnormality process. Thereafter, the foreign object detection unit 14 ends the foreign object detection operation (S11). Thereby, the power feeding operation by the power feeding device 2 is not performed.
  • the normal operation of the foreign object detection unit 14 can be confirmed before the power supply operation by the power supply device 2 is started, and the power supply by the power supply device 2 while the foreign object detection unit 14 is in an abnormal state. It is possible to prevent the operation from starting.
  • the power supply control unit 16 After the “notification of abnormality of the abnormality detection unit 14 (S21)” and before “stop of the function of the power supply device 2 (S22)”, the power supply control unit 16 has any abnormality other than the foreign matter detection unit 14. After confirming that there is no abnormality other than the foreign matter detection unit 14, the control of “stopping the function of the power supply device 2 (S22)” may be performed.
  • the power supply controller 16 compares the capacitance measured by the foreign object detector 14 during power supply with the initial value stored in S4, and whether or not a foreign object has entered during power supply, that is, It is determined whether or not the capacitance measured by the foreign matter detection unit 14 exceeds an initial value. If it is determined that a foreign object has entered during power supply (“YES” in S6), the process proceeds to a foreign object intrusion process (S7) for controlling transmission power. Note that the foreign object intrusion determination is not limited to the above-described criteria. For example, when the absolute value of the difference between the electrostatic capacitance measured by the foreign object detector 14 during power supply and the initial value stored in S4 exceeds a predetermined value, it may be determined that a foreign object has entered. .
  • FIG. 7 is a flowchart showing an example of foreign object intrusion processing.
  • the power feeding device 2 first notifies the abnormality of the abnormality detection unit 14 by a notification means such as a display or sound.
  • the notification is made by the speaker 46 shown in FIG. 2 (S31).
  • the power supply control unit 16 determines whether or not the capacitance value measured by the foreign object detection unit 14 exceeds a preset setting value while continuing the power supply (S32).
  • the set value is set to a capacitance value that can be taken when the foreign object is a metal object.
  • said setting value you may use the other value according to the kind of foreign material to detect.
  • the power supply control unit 16 transmits the transmission power from the power supply coil unit 12 to the power reception coil unit 18 by a predetermined amount (for example, 1 / 2) Control transmission power such as reducing or stopping power transmission (S33). Further, the notification means such as display or sound notifies that the transmission power is controlled by the foreign object intrusion (S34), the foreign object intrusion process is terminated, and the flow proceeds to S9.
  • step S32 when it is determined in step S32 that the capacitance does not exceed the set value (“NO” in S32), the power supply control unit 16 bypasses S33 and S34 and ends the foreign substance intrusion processing, and the flow Shifts to S9.
  • the power supply control unit 16 causes the inverter unit 10 to continue power transmission (S8), and the flow is as follows. The process proceeds to S9. In S ⁇ b> 9, the power supply control unit 16 confirms whether there is an instruction to interrupt power transmission for reasons such as foreign object removal by a person or use of a car.
  • the power supply control unit 16 determines whether the charging is completed (S10). When the charging is not completed (“NO” in S10), the flow returns to S6, while when the charging is completed (“YES” in S10), the power supply control unit 16 ends the power supply and detects foreign matter. The unit 14 ends the foreign object detection operation (S11).
  • the process of S9 is performed after S8.
  • the power supply control unit 16 confirms whether or not there is an instruction to interrupt power transmission from the start of power supply in S4, and if there is an instruction to interrupt power transmission, the inverter unit 10 terminates power transmission.
  • the power supply from the power supply coil unit 12 to the power receiving coil unit 18 may be terminated, and the foreign object detection unit 14 may end the foreign object detection operation (S11).
  • the foreign matter detection unit 14 having a capacitance sensor capable of detecting foreign matter existing around the cover and the monitoring unit 17 that monitors normal operation of the foreign matter detection unit 14 are provided. Therefore, the normal operation of the foreign object detection unit 14 can be confirmed before the power supply operation by the power supply device 2 is started, and the power supply operation by the power supply device 2 is started while the foreign object detection unit 14 is in an abnormal state. Can be prevented. Accordingly, it is possible to always safely and reliably detect the intrusion of foreign matter around the cover during power feeding, particularly the intrusion of foreign matter between the primary coil 44 and the secondary coil 45.
  • a foreign object detection unit (capacitance sensor) in the power feeding device
  • a foreign object detection unit (capacitance sensor) and a monitoring unit may be provided in the power receiving device.
  • the trigger for starting monitoring (see S ⁇ b> 1 in FIG. 5) in the monitoring unit of the power receiving apparatus may be performed by, for example, approaching a relative positional relationship between the power receiving apparatus and the power feeding apparatus. More specifically, for the approach of the relative positional relationship, for example, the power receiving device or the power feeding device may measure a signal indicating that the relative positional relationship between the power receiving device and the power feeding device is approached, You may receive via the wire communication or radio
  • the power supply device is laid on the ground and the power reception device is mounted on the electric propulsion vehicle.
  • the power reception device is laid on the ground and the power supply device is mounted on the electric propulsion vehicle. The same applies to cases.
  • the contactless power transmission device of the present invention can reliably detect foreign matter that has entered the periphery of the cover during power feeding from the power feeding device to the power receiving device, so that, for example, a person or an object approaches carelessly or mistakenly. This is useful for a safety system related to power supply to a power receiving device provided in a potential electric propulsion vehicle.
  • Power feeding device 4 Power receiving device 14 Foreign matter detection unit (capacitance sensor) 17 Monitoring unit 40 Cover 42 Substrate (base) 44 Primary coil 45 Secondary coil

Abstract

La présente invention a trait à un dispositif de transmission d'énergie électrique sans contact qui transmet de l'énergie électrique entre un dispositif d'alimentation électrique (2) et un dispositif de réception d'électricité (4) à l'aide de la conduction électromagnétique. Le dispositif d'alimentation électrique (2) est équipé d'un corps principal, d'une bobine primaire (44) qui est positionnée entre le corps principal et le dispositif de réception d'électricité (4) et qui permet de générer un flux magnétique, et d'un couvercle qui est monté sur le corps principal et qui permet de recouvrir le côté extérieur de la bobine primaire (44). D'autre part, le dispositif de transmission d'énergie électrique sans contact est équipé d'un détecteur de capacité électrostatique (14) qui permet de détecter toute contamination autour du couvercle et d'une partie de surveillance (17) qui permet de surveiller un signal qui est détecté par le détecteur de capacité électrostatique (14).
PCT/JP2012/006932 2011-10-28 2012-10-29 Dispositif de transmission d'énergie électrique sans contact et dispositif d'alimentation électrique ainsi que dispositif de réception d'électricité utilisant celui-ci WO2013061617A1 (fr)

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JP2011236898A JP2015008551A (ja) 2011-10-28 2011-10-28 非接触電力伝送装置
JP2011-236898 2011-10-28

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WO2013061617A1 true WO2013061617A1 (fr) 2013-05-02

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JP2016541226A (ja) * 2013-11-21 2016-12-28 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング エネルギー伝送システム、及び、エネルギー伝送システムを診断する方法
JPWO2015097807A1 (ja) * 2013-12-26 2017-03-23 三菱電機エンジニアリング株式会社 共振型送信電源装置及び共振型送信電源システム
WO2021045049A1 (fr) * 2019-09-03 2021-03-11 株式会社デンソー Capteur à ultrasons

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JP6739226B2 (ja) * 2016-05-09 2020-08-12 株式会社テクノバ 非接触給電システム用異物検知装置と異物検知方法

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JP2008087733A (ja) * 2006-10-05 2008-04-17 Showa Aircraft Ind Co Ltd 非接触給電装置
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JP2010226946A (ja) * 2009-02-25 2010-10-07 Maspro Denkoh Corp 移動体の電力供給システム
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JPH0716553U (ja) * 1993-08-25 1995-03-17 松下電工株式会社 電源装置
JP2008087733A (ja) * 2006-10-05 2008-04-17 Showa Aircraft Ind Co Ltd 非接触給電装置
WO2008140333A2 (fr) * 2007-05-10 2008-11-20 Auckland Uniservices Limited Véhicule électrique à multiples sources d'énergie
JP2010226946A (ja) * 2009-02-25 2010-10-07 Maspro Denkoh Corp 移動体の電力供給システム
JP2011010435A (ja) * 2009-06-25 2011-01-13 Fujitsu Ten Ltd 非接触式電力供給装置および非接触式電力供給ユニット

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016541226A (ja) * 2013-11-21 2016-12-28 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング エネルギー伝送システム、及び、エネルギー伝送システムを診断する方法
JPWO2015097807A1 (ja) * 2013-12-26 2017-03-23 三菱電機エンジニアリング株式会社 共振型送信電源装置及び共振型送信電源システム
WO2021045049A1 (fr) * 2019-09-03 2021-03-11 株式会社デンソー Capteur à ultrasons
JP2021039006A (ja) * 2019-09-03 2021-03-11 株式会社Ｓｏｋｅｎ 超音波センサ
JP7287198B2 (ja) 2019-09-03 2023-06-06 株式会社Soken 超音波センサ

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