Non-contact power supply system during travel, power supply device, and power reception device

Abstract

This non-contact power supply system during travel supplies power in a non-contact manner from a road-side power supply device to a traveling vehicle equipped with a vehicle-side power receiving device, and compares wide-area wireless communication information with narrow-area wireless communication information. When the information of the wide-area wireless communication matches the information of the narrow-area wireless communication, power supply operation is performed from the road-side power supply device to the vehicle-side power receiving device, and when the information of the wide-area wireless communication does not match the information of the narrow-area wireless communication, predetermined treatment is performed.

Description

Technical Field

[0001] The present invention relates to a non-contact power supply system, a power supply device and a power receiving device during driving. Background Art

[0002] Patent Document 1 discloses a technology including a communication unit for wirelessly communicating between a power transmitting device and a power receiving device, wherein the communication unit switches the communication range between a larger communication range and a smaller communication range.

[0003]

Prior technical literature

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2013-240132 Summary of the Invention

[0005] Problems to be solved by the invention

[0006] In-vehicle contactless power feeding, which involves contactlessly supplying power from a power transmitting device to a moving vehicle equipped with a power receiving device, different communication methods are used: wide-area wireless communication, which transmits a large amount of information over a wide area but has a slow response speed, and narrow-area wireless communication, which transmits a small amount of information over a narrow area but has a fast response speed. Therefore, there is room for improvement in how to handle situations where information such as power requests differs between wide-area and narrow-area wireless communication.

[0007] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a non-contact power supply system, a power supply device, and a power receiving device during driving that can perform predetermined processing according to the compatibility between information of wide-area wireless communication and information of narrow-area wireless communication.

[0008] Solutions to Problems

[0009] In order to solve the above-mentioned problems and achieve the purpose, the non-contact power supply system during driving of the present invention supplies power to a vehicle equipped with a vehicle-side power receiving device from a road-side power supply device in a non-contact manner. The non-contact power supply system during driving is characterized in that the road-side power supply device has: a first communication device for performing wide-area wireless communication between the first communication device and the vehicle-side power receiving device; and a second communication device for performing narrow-area wireless communication between the second communication device and the vehicle-side power receiving device, the narrow-area wireless communication being able to transmit less information than the wide-area wireless communication and having a faster response speed than the wide-area wireless communication, and the vehicle-side power receiving device having: a third communication device for performing wide-area wireless communication between the third communication device and the road-side power supply device; and a fourth communication device for performing narrow-area wireless communication between the fourth communication device and the road-side power supply device. Communication, the above-mentioned road-side power supply device has a matching confirmation unit, the above-mentioned matching confirmation unit compares the information of the above-mentioned wide-area wireless communication sent from the above-mentioned third communication device and obtained by the above-mentioned first communication device with the information of the above-mentioned narrow-area wireless communication sent from the above-mentioned fourth communication device and obtained by the above-mentioned second communication device, and can consider the delay time difference between the above-mentioned wide-area wireless communication and the above-mentioned narrow-area wireless communication to determine the matching between the information of the above-mentioned wide-area wireless communication and the information of the above-mentioned narrow-area wireless communication. The above-mentioned matching confirmation unit compares the information of the above-mentioned wide-area wireless communication with the information of the above-mentioned narrow-area wireless communication. When the information of the above-mentioned wide-area wireless communication matches the information of the above-mentioned narrow-area wireless communication, the power supply operation from the above-mentioned road-side power supply device to the above-mentioned vehicle-side power receiving device is performed. When the information of the above-mentioned wide-area wireless communication does not match the information of the above-mentioned narrow-area wireless communication, a predetermined predetermined treatment is performed.

[0010] Thus, the non-contact power supply system during driving of the present invention can perform processing corresponding to the compatibility between the information of the wide-area wireless communication and the information of the narrow-area wireless communication in consideration of the communication delay time of the wide-area wireless communication.

[0011] In addition, in the above, the matching confirmation unit may include a time measurement unit, which measures a duration of a difference between the information of the wide-area wireless communication and the information of the narrow-area wireless communication, and when the duration of the difference exceeds a predetermined time, the matching confirmation unit determines that the information of the wide-area wireless communication and the information of the narrow-area wireless communication do not match.

[0012] This makes it possible to determine the mismatch by taking into account the communication delay in wide area wireless communication.

[0013] In addition, in the above, it may also be that the information of the wide-area wireless communication and the information of the narrow-area wireless communication respectively include a requested power value, and when there is a difference between the requested power value included in the information of the wide-area wireless communication and the requested power value included in the narrow-area wireless communication, the matching confirmation unit determines it as the mismatch.

[0014] Thus, when there is a difference between the requested power value included in the information of the wide area wireless communication and the requested power value included in the narrow area wireless communication, the predetermined action can be performed.

[0015] In addition, in the above, the matching confirmation unit may include a calculation unit, which is capable of respectively calculating a moving average value of the requested power value contained in the information of the wide-area wireless communication and a moving average value of the requested power value contained in the information of the narrow-area wireless communication, and the matching confirmation unit compares the moving average value of the requested power value contained in the information of the wide-area wireless communication with the moving average value of the requested power value contained in the information of the narrow-area wireless communication to determine the matching.

[0016] Thus, even when the requested power value included in the information of the narrow-area wireless communication frequently fluctuates, the above-mentioned compatibility can be appropriately determined.

[0017] In addition, in the above, the matching confirmation unit may determine that the match is achieved when the requested power value included in the information of the wide-area wireless communication and the requested power value included in the information of the narrow-area wireless communication are values ​​within a predetermined range relative to the requested power value of one party and the requested power value of the other party.

[0018] As a result, even when the requested power value included in the narrow-area wireless communication fluctuates, the above-mentioned matching is determined, and the power supply operation from the road-side power supply device to the vehicle-side power receiving device can be performed.

[0019] In addition, in the above, as the predetermined treatment, the smaller of the power request value included in the information of the wide-area wireless communication and the power request value included in the information of the narrow-area wireless communication may be used as the target power value to perform the power supply operation from the road-side power supply device to the vehicle-side power receiving device.

[0020] Thereby, overcharging can be suppressed.

[0021] Furthermore, in the above, when the wide-area wireless communication information and the narrow-area wireless communication information do not match, the predetermined action may be to perform power supply from the road-side power supply device to the vehicle-side power receiving device based on the narrow-area wireless communication information.

[0022] Thus, even when the wide area wireless communication is interrupted and the mismatch is determined, power supply from the road-side supply device to the vehicle-side power receiving device can be performed with an amount of power close to the actual power requested by the vehicle.

[0023] In the above, when the wide area wireless communication information and the narrow area wireless communication information do not match, the predetermined action may be to stop power supply from the roadside power supply device to the vehicle-side power receiving device.

[0024] Thereby, overcharging can be suppressed.

[0025] In addition, in the above, when the information of the wide-area wireless communication does not match the information of the narrow-area wireless communication, as the predetermined procedure, the power supply operation from the road-side power supply device to the vehicle-side power receiving device may be performed based on the new one of the information of the wide-area wireless communication and the information of the narrow-area wireless communication.

[0026] This allows the power supply operation from the road-side power supply device to the vehicle-side power receiving device to be performed based on the time-series new information.

[0027] In addition, the power supply device of the present invention supplies power in a contactless manner to a moving vehicle equipped with a vehicle-side power receiving device and is installed on a road on which the above-mentioned vehicle is traveling. The above-mentioned power supply device is characterized in that the above-mentioned power supply device has: a first communication device for performing wide-area wireless communication between the above-mentioned first communication device and a third communication device of the above-mentioned vehicle-side power receiving device; and a second communication device for performing narrow-area wireless communication between the above-mentioned second communication device and a fourth communication device of the above-mentioned vehicle-side power receiving device, the above-mentioned narrow-area wireless communication can transmit less information than the above-mentioned wide-area wireless communication and has a faster response speed than the above-mentioned wide-area wireless communication, and the above-mentioned power supply device has a matching confirmation unit, and the above-mentioned matching confirmation unit checks the information sent from the above-mentioned third communication device and obtained by the above-mentioned first communication device. The information on the wide-area wireless communication is compared with the information on the narrow-area wireless communication transmitted from the fourth communication device and obtained by the second communication device, and the matching between the information on the wide-area wireless communication and the information on the narrow-area wireless communication is determined by taking into account a delay time difference between the wide-area wireless communication and the narrow-area wireless communication. The matching confirmation unit compares the information on the wide-area wireless communication with the information on the narrow-area wireless communication. If the information on the wide-area wireless communication matches the information on the narrow-area wireless communication, the power supply device performs a power supply operation to the vehicle-side power receiving device. If the information on the wide-area wireless communication does not match the information on the narrow-area wireless communication, the power supply device performs a predetermined predetermined action.

[0028] Thus, the power supply device of the present invention can perform processing corresponding to the compatibility between the information of the wide area wireless communication and the information of the narrow area wireless communication in consideration of the communication delay time of the wide area wireless communication.

[0029] In addition, the power receiving device of the present invention receives power supplied from the road-side power supply device in a contactless manner while the vehicle is traveling and is mounted on the above-mentioned vehicle. The above-mentioned power receiving device is characterized in that the above-mentioned power receiving device has: a third communication device, which performs wide-area wireless communication between the above-mentioned third communication device and the first communication device of the above-mentioned road-side power supply device; and a fourth communication device, which performs narrow-area wireless communication between the above-mentioned fourth communication device and the second communication device of the above-mentioned road-side power supply device, the above-mentioned narrow-area wireless communication can transmit less information than the above-mentioned wide-area wireless communication and has a faster response speed than the above-mentioned wide-area wireless communication, and the above-mentioned road-side power supply device has a matching confirmation unit for the above-mentioned wide-area wireless communication sent from the above-mentioned third communication device and obtained by the above-mentioned first communication device The information of the wide-area wireless communication is compared with the information of the narrow-area wireless communication sent from the fourth communication device and obtained by the second communication device, and the matching between the information of the wide-area wireless communication and the information of the narrow-area wireless communication can be determined by taking into account the delay time difference between the wide-area wireless communication and the narrow-area wireless communication. The matching confirmation unit compares the information of the wide-area wireless communication with the information of the narrow-area wireless communication. When the information of the wide-area wireless communication matches the information of the narrow-area wireless communication, the power supply operation is performed and power is received from the vehicle-side power receiving device. When the information of the wide-area wireless communication does not match the information of the narrow-area wireless communication, the road-side power supply device performs a predetermined predetermined action.

[0030] Thus, the power receiving device of the present invention can perform processing corresponding to the consistency between the information of the wide area wireless communication and the information of the narrow area wireless communication in consideration of the communication delay time of the wide area wireless communication.

[0031] Effects of the Invention

[0032] The non-contact power supply system, power supply device, and power receiving device during driving of the present invention have the effect of being able to perform predetermined processing corresponding to the compatibility of information of wide-area wireless communication and information of narrow-area wireless communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram showing a wireless power transmission system according to an embodiment.

[0034] Figure 2 It is a diagram showing the overall configuration of a wireless power transmission system.

[0035] Figure 3 This is a schematic diagram for explaining wide-area wireless communication in a wireless power transmission system.

[0036] Figure 4 This is a block diagram for explaining the functional structure of the power transmission ECU.

[0037] Figure 5 This is a block diagram for explaining the functional structure of a vehicle ECU.

[0038] Figure 6 This is a diagram for explaining the process of power transmission.

[0039] Figure 7 This is a sequence diagram showing a case where communication using wide area wireless communication is performed between a vehicle and a supply device.

[0040] Figure 8 This is a sequence diagram showing the operation after the power supply from the supply device to the vehicle while it is running is completed.

[0041] Figure 9 This is a flowchart showing a first example of control for power transmission by comparing information on wide-area wireless communication and information on narrow-area wireless communication.

[0042] Figure 10 This is a flowchart showing a second example of control for power transmission by comparing information on wide-area wireless communication and information on narrow-area wireless communication. DETAILED DESCRIPTION

[0043] Hereinafter, embodiments of the non-contact power supply system, power supply device, and power receiving device during driving of the present invention will be described.

[0044] Figure 1 This is a schematic diagram illustrating a wireless power transmission system 1 according to an embodiment. Wireless power transmission system 1 is a non-contact power supply system for a moving vehicle, comprising a supply device 2 and a vehicle 3. Supply device 2 supplies power to moving vehicle 3 in a non-contact manner. Vehicle 3 is an electric vehicle capable of being charged with power from an external power source, such as a battery-electric vehicle (BEV) or a plug-in hybrid electric vehicle (PHEV).

[0045] This wireless power transmission system 1 wirelessly transmits power from a supply device 2 to a vehicle 3 based on magnetic field resonant coupling (magnetic field resonance). Wireless power transmission system 1 transmits power from supply device 2 to vehicle 3 traveling on a road 4 in a contactless manner. Specifically, wireless power transmission system 1 transmits power through magnetic field resonance, utilizing magnetic field resonant coupling (magnetic field resonance) to supply power to vehicle 3 while it is traveling. Wireless power transmission system 1 can be implemented as a dynamic wireless power transmission (D-WPT) system or a magnetic field dynamic wireless power transmission (MF-D-WPT) system.

[0046] The supply equipment 2 includes a supply device 5 serving as a roadside power supply device (power supply device) and an AC power supply 6 that supplies power to the supply device 5. The supply device 5 transmits power supplied from the AC power supply 6 to the vehicle 3 in a contactless manner. The AC power supply 6 is, for example, a commercial power supply. The supply device 5 includes a power transmission device 10 having a primary coil 11.

[0047] The supply device 5 includes a segment 7 including a primary coil 11 and a management device 8 for managing the segment 7. The segment 7 is embedded in the lane of the road 4. The management device 8 is installed next to the road 4. The segment 7 is electrically connected to the management device 8. The management device 8 is electrically connected to the AC power supply 6 and supplies power from the AC power supply 6 to the segment 7. The segment 7 is electrically connected to the AC power supply 6 via the management device 8. A plurality of segments 7 can be arranged along the lane of the road 4. For example, Figure 1 As shown, the supply device 5 includes three segments 7 arranged along the lanes of the road 4 and a management device 8 connected to the three segments 7. The segments 7 have the function of transmitting power from the supply device 5 to the vehicle 3 in a contactless manner. The management device 8 has the function of controlling the wireless power transmission in the segments 7.

[0048] Vehicle 3 includes a power receiving device 20, which is a vehicle-side power receiving device having a secondary coil 21. Power receiving device 20 is installed on the underbody of vehicle 3. When vehicle 3 travels on road 4, where primary coil 11 is installed, the ground-side primary coil 11 and the vehicle-side secondary coil 21 face each other in the vertical direction. While vehicle 3 travels on road 4, wireless power transmission system 1 transmits power from primary coil 11 of power transmitting device 10 to secondary coil 21 of power receiving device 20 in a contactless manner.

[0049] In this description, "driving" refers to a state in which the vehicle 3 is on the road 4 for the purpose of traveling. Driving also includes a state in which the vehicle 3 is temporarily stopped on the road 4. For example, a state in which the vehicle 3 is stopped on the road 4, such as when waiting at a traffic light, is also included in "driving." On the other hand, even when the vehicle 3 is on the road 4, such as when the vehicle 3 is parked, it is not included in "driving."

[0050] In this description, lanes where primary coils 11 (segments 7) are embedded are sometimes referred to as D-WPT lanes, and locations where wireless power transmission from power supply device 5 is possible, as sections of road 4, are referred to as D-WPT charging stations. In D-WPT lanes and D-WPT charging stations, multiple primary coils 11 (segments 7) are arranged along the direction of travel of vehicle 3 across a predetermined section of road 4.

[0051] Figure 2 1 is a diagram showing the overall configuration of the wireless power transmission system 1. In the supply facility 2, the supply device 5 is electrically connected to the AC power source 6. In the supply device 5, the zone 7 is electrically connected to the management device 8.

[0052] The supply device 5 includes components provided in the management device 8 and components provided in the section 7. The supply device 5 includes a power transmission device 10, a power transmission ECU (Electronic Control Unit) 110, a first communication device 120, a second communication device 130, and a foreign object detection device 140.

[0053] The power transmission device 10 includes a circuit connected to the AC power source 6 . The power transmission device 10 includes a PFC (Power Factor Correction) circuit 210 , an inverter (INV) 220 , a filter circuit 230 , and a power transmission-side resonant circuit 240 .

[0054] The PFC circuit 210 improves the power factor of AC power input from the AC power source 6, converts the AC power into DC power, and outputs the DC power to the inverter 220. The PFC circuit 210 includes an AC / DC converter and is electrically connected to the AC power source 6.

[0055] Inverter 220 converts the DC power input from PFC circuit 210 into AC power. Each switching element in inverter 220 is composed of an IGBT (Insulated Gate Bipolar Transistor) or a MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor), and switches based on a control signal from power transmission ECU 110. For example, the drive frequency of inverter 220 is 85 kHz. Inverter 220 outputs the converted AC power to filter circuit 230.

[0056] Filter circuit 230 removes noise from the AC current input from inverter 220 and supplies the noise-removed AC power to the power transmission-side resonant circuit 240. Filter circuit 230 is an LC filter composed of a combination of coils and capacitors. For example, filter circuit 230 comprises a T-type filter, with two coils and a capacitor arranged in a T-shape. PFC circuit 210, inverter 220, and filter circuit 230 constitute the power conversion unit 12 of power transmission device 10.

[0057] The power-transmitting-side resonant circuit 240 transmits the AC power supplied from the filter circuit 230 to the power transmission unit of the power receiving device 20 in a contactless manner. When AC power is supplied from the filter circuit 230 to the power-transmitting-side resonant circuit 240, current flows through the primary coil 11, generating a magnetic field for power transmission.

[0058] The power transmission-side resonant circuit 240 includes a primary coil 11 and a resonant capacitor. The primary coil 11 is a power transmission coil. The resonant capacitor is connected in series with one end of the primary coil 11 to adjust the resonant frequency of the power transmission-side resonant circuit. This resonant frequency is between 10 kHz and 100 GHz, preferably 85 kHz. For example, the power transmission device 10 is configured so that the resonant frequency of the power transmission-side resonant circuit 240 matches the drive frequency of the inverter 220. The power transmission-side resonant circuit 240 constitutes the primary device 13 of the power transmission device 10.

[0059] The power transmission device 10 includes a power converter 12 and a primary device 13. The power converter 12 includes a PFC circuit 210, an inverter 220, and a filter circuit 230. The primary device 13 includes a transmission-side resonant circuit 240. The power transmission device 10 has a configuration in which the power converter 12 is provided in the management device 8 and the primary device 13 is provided in the section 7.

[0060] In the supply device 5 , the power converter 12 , the power transmission ECU 110 , and the first communication device 120 of the power transmission device 10 are provided in the management device 8 , and the primary device 13 , the second communication device 130 , and the foreign object detection device 140 of the power transmission device 10 are provided in the section 7 .

[0061] The power transmission ECU 110 is an electronic control unit that controls the power supply device 5. It includes a processor and memory. The processor is composed of a CPU (Central Processing Unit), a DSP (Digital Signal Processor), and an FPGA (Field-Programmable Gate Array). The memory is a main storage device composed of RAM (Random Access Memory) and ROM (Read Only Memory). The power transmission ECU 110 loads programs stored in the storage unit into the working area of ​​the memory (main storage device) and executes them. The execution of the programs controls the various components, thereby achieving the intended functions. The storage unit is composed of recording media such as EPROM (Erasable Programmable ROM), a hard disk drive (HDD), and removable media. Examples of removable media include disk recording media such as USB (Universal Serial Bus) memory, CD (Compact Disc), DVD (Digital Versatile Disc), and BD (Blu-ray Disc). The storage unit can store an operating system (OS), various programs, various tables, and various databases. Signals from various sensors are input to the power transmission ECU 110. Signals from the foreign object detection device 140 are also input to the power transmission ECU 110. The power transmission ECU 110 then executes various controls based on the signals input from the various sensors.

[0062] For example, the power transmission ECU 110 performs power control to adjust the power for transmission. In this power control, the power transmission ECU 110 controls the power transmission device 10. The power transmission ECU 110 outputs a control signal to the power conversion unit 12 to control the power supplied from the power conversion unit 12 to the primary device 13. The power transmission ECU 110 controls the switching elements included in the PFC circuit 210 to adjust the power for transmission, and also controls the switching elements included in the inverter 220 to adjust the power for transmission.

[0063] The power transmission ECU 110 also performs communication control for controlling communication with the vehicle 3 . In the communication control, the power transmission ECU 110 controls the first communication device 120 and the second communication device 130 .

[0064] The first communication device 120 is a ground-side communication device that performs wide-area wireless communication. The first communication device 120 performs wireless communication with one of the vehicles 3 traveling on the road 4, just before approaching the D-WPT lane. The state just before approaching the D-WPT lane means that the vehicle 3 is in a position where narrow-area wireless communication with the supply device 5 is impossible.

[0065] Wide-area wireless communication is communication with a range of 10 meters to 10 kilometers. Wide-area wireless communication has a longer range than narrow-area wireless communication. Various wireless communication technologies with longer ranges can be used as wide-area wireless communication. For example, communication standards established by 3GPP (registered trademark) and IEEE, such as 4G, LTE, 5G, and WiMAX, are used for wide-area wireless communication. In the wireless power transmission system 1, vehicle information associated with vehicle identification information (vehicle ID) is transmitted from the vehicle 3 to the supply device 5 using wide-area wireless communication.

[0066] The second communication device 130 is a ground-side communication device that performs narrow-area wireless communication. The second communication device 130 performs wireless communication with vehicles 3 traveling on the road 4 that are approaching or entering the D-WPT lane. Approaching the D-WPT lane means that the vehicle 3 is in a position where narrow-area wireless communication is possible with the supply device 5.

[0067] Narrow-area wireless communication is communication with a communication distance of less than 10 meters. Narrow-area wireless communication is communication with a communication distance shorter than wide-area wireless communication. As narrow-area wireless communication, various short-range wireless communications with shorter communication distances can be used. For example, communication that complies with any communication standard established by IEEE, ISO, IEC, etc. is used for narrow-area wireless communication. As an example, Wi-Fi (registered trademark), Bluetooth (registered trademark), and ZigBee (registered trademark) are used for narrow-area wireless communication. Alternatively, as a technology for performing narrow-area wireless communication, RFID (Radio Frequency Identification), DSRC (Dericed Short Range Communication), etc. can also be used. In the wireless power transmission system 1, vehicle identification information and the like are sent from the vehicle 3 to the supply device 5 using narrow-area wireless communication.

[0068] Foreign object detection device 140 detects metallic foreign objects, living organisms, and the like above primary coil 11. For example, foreign object detection device 140 comprises a sensor coil or an imaging device installed on the ground. Foreign object detection device 140 is used to perform foreign object detection (FOD) and living object protection (LOP) functions in wireless power transmission system 1.

[0069] In the supply device 5, the power transmission device 10 is configured to be divided into sections 7 and a management device 8, with three sections 7 connected to one management device 8. The power transmission device 10 is configured such that a single inverter supplies power to three transmission-side resonant circuits 240. Furthermore, in the supply device 5, signals from each section 7 are input to the management device 8. Signals from the second communication device 130 and foreign object detection device 14 located in the first section are input to the power transmission ECU 110. Similarly, signals from the second communication device 130 and foreign object detection device 14 located in the second section are input to the power transmission ECU 110. Signals from the second communication device 130 and foreign object detection device 14 located in the third section are input to the power transmission ECU 110. The power transmission ECU 110 can understand the status of each section 7 based on the signals input from each section 7.

[0070] Vehicle 3 includes a power receiving device 20 , a charging relay 310 , a battery 320 , a vehicle ECU 330 , a third communication device 340 , a fourth communication device 350 , and a GPS (Global Positioning System) receiver 360 .

[0071] Power receiving device 20 supplies power received from power transmitting device 10 to battery 320. Power receiving device 20 is electrically connected to battery 320 via charging relay 310. Power receiving device 20 includes a power receiving-side resonant circuit 410, a filter circuit 420, and a rectifier circuit 430.

[0072] The receiving-side resonant circuit 410 is a power receiving unit that receives power transmitted non-contact from the power transmitting device 10. The receiving-side resonant circuit 410 is composed of a receiving-side resonant circuit comprising a secondary coil 21 and a resonant capacitor. The secondary coil 21 is a receiving coil that receives power transmitted non-contact from the primary coil 11. The resonant capacitor is connected in series with one end of the secondary coil 21 to adjust the resonant frequency of the receiving-side resonant circuit. The resonant frequency of the receiving-side resonant circuit 410 is specified to match the resonant frequency of the transmitting-side resonant circuit 240.

[0073] The resonant frequency of the receiving-side resonant circuit 410 is the same as the resonant frequency of the transmitting-side resonant circuit 240. Therefore, when the transmitting-side resonant circuit 240 generates a magnetic field while the receiving-side resonant circuit 410 and the transmitting-side resonant circuit 240 are facing each other, the vibrations of the magnetic field are transmitted to the receiving-side resonant circuit 410. The primary coil 11 and the secondary coil 21 are in a resonant state. When an induced current flows through the secondary coil 21 due to electromagnetic induction, an induced electromotive force is generated in the receiving-side resonant circuit 410. In this way, the receiving-side resonant circuit 410 receives power transmitted non-contact from the transmitting-side resonant circuit 240. Furthermore, the receiving-side resonant circuit 410 supplies the power received from the transmitting-side resonant circuit 240 to the filter circuit 420. The receiving-side resonant circuit 410 constitutes the secondary device 22 of the power receiving device 20.

[0074] Filter circuit 420 removes noise from the AC current input from receiving-side resonant circuit 410 and outputs the noise-removed AC power to rectifier circuit 430. Filter circuit 420 is an LC filter composed of a combination of coils and capacitors. For example, filter circuit 420 comprises a T-type filter consisting of two coils and a capacitor arranged in a T-shape.

[0075] Rectifier circuit 430 converts the AC power input from filter circuit 420 into DC power and outputs it to battery 320. Rectifier circuit 430 is comprised of, for example, a full-bridge circuit consisting of four diodes connected in a full-bridge configuration as rectifying elements. A switching element is connected in parallel to each diode in rectifier circuit 430. Each switching element in rectifier circuit 430 is comprised of an IGBT and switches in response to a control signal from vehicle ECU 330. Rectifier circuit 430 supplies the converted DC power to battery 320. Filter circuit 420 and rectifier circuit 430 constitute power converter 23 of power receiving device 20.

[0076] The power receiving device 20 includes a secondary device 22 and a power conversion unit 23. The secondary device 22 includes a power receiving-side resonant circuit 410. The power conversion unit 23 includes a filter circuit 420 and a rectifier circuit 430.

[0077] Charging relay 310 is provided between rectifier circuit 430 and battery 320. The opening and closing states of charging relay 310 are controlled by vehicle ECU 330. When battery 320 is being charged by power transmission device 10, charging relay 310 is controlled to a closed state. When charging relay 310 is closed, rectifier circuit 430 and battery 320 are connected so that electricity can flow between them. When charging relay 310 is open, rectifier circuit 430 and battery 320 are disconnected, preventing electricity from flowing between them. For example, when charging relay 310 is open, vehicle 3 does not request power supply.

[0078] Battery 320 is a rechargeable DC power source, such as a lithium-ion battery or a nickel-metal hydride battery. Battery 320 stores the power supplied from power transmission device 10 to power reception device 20. Furthermore, battery 320 can supply power to the driving motor of vehicle 3. Battery 320 is electrically connected to the driving motor via a power control unit (PCU). The PCU power conversion device converts the DC power from battery 320 into AC power and supplies it to the driving motor. Each switching element in the PCU is composed of an IGBT and switches according to control signals from the vehicle ECU 330.

[0079] The vehicle ECU 330 is an electronic control unit that controls the vehicle 3. Its hardware configuration is similar to that of the power transmission ECU 110. Signals from various sensors installed on the vehicle 3 are input to the vehicle ECU 330. Furthermore, positioning signals received by the GPS receiver 360 are input to the vehicle ECU 330. The vehicle ECU 330 can obtain the current location information of the vehicle 3 from the GPS receiver 360. Furthermore, the vehicle ECU 330 executes various control operations based on the signals input from the various sensors.

[0080] For example, vehicle ECU 330 executes contactless charging control, in which power is transferred from primary coil 11 to secondary coil 21 in a contactless manner, and the power received by secondary coil 21 is stored in battery 320. During contactless charging control, vehicle ECU 330 controls rectifier circuit 430, charging relay 310, third communication device 340, and fourth communication device 350. Contactless charging control includes power control for controlling charging power and communication control for controlling communication with supply device 5. During power control, vehicle ECU 330 controls the switching elements included in rectifier circuit 430 to adjust the power (charging power) supplied from power receiving device 20 to battery 320. During communication control, vehicle ECU 330 controls third communication device 340 and fourth communication device 350.

[0081] The third communication device 340 is a vehicle-side communication device that performs wide-area wireless communication. When vehicle 3, traveling on road 4, approaches the D-WPT lane, the third communication device 340 performs wireless communication with the first communication device 120 of the supply device 5. Wide-area wireless communication is bidirectional. Communication between the first communication device 120 and the third communication device 340 is performed via high-speed wireless communication.

[0082] The fourth communication device 350 is a vehicle-side communication device that performs narrow-area wireless communication. When vehicle 3 approaches or enters the D-WPT lane, the fourth communication device 350 performs wireless communication with the second communication device 130 of the supply device 5. Narrow-area wireless communication is one-way wireless signaling. One-way wireless signaling is P2PS (Point to Point Signaling). P2PS is used to notify vehicle 3 of vehicle identification information to the supply device 5 during pairing, alignment checks, magnetic coupling checks, the end of power transmission, and the end of power transmission. In addition, P2PS can be used as a means of lateral alignment checks (Alignment Check). The lateral direction refers to the width of the lane and refers to the width of vehicle 3.

[0083] The GPS receiver 360 detects the current position of the vehicle 3 based on positioning information obtained from a plurality of positioning satellites. The current position information of the vehicle 3 detected by the GPS receiver 360 is transmitted to the vehicle ECU 330.

[0084] Furthermore, in the supply device 5, the filter circuit 230 may be included in the management device 8 rather than in the section 7. That is, the filter circuit 230 may be installed adjacent to the road 4. In this case, the power conversion unit 12 includes the PFC circuit 210, the inverter 220, and the filter circuit 230, and the primary device 13 includes the power transmission-side resonant circuit 240.

[0085] In addition, the filter circuit 230 may be provided independently of the primary coil 11 , or may be provided collectively in a plurality of primary coils 11 .

[0086] The filter circuit 230 is not limited to a T-type filter, and may be, for example, a bandpass filter in which a coil and a capacitor are connected in series. This also applies to the filter circuit 420 of the vehicle 3 .

[0087] Furthermore, in power transmission device 10, after inverter 220 is connected to a plurality of primary coils 11, a switch for switching the primary coil 11 to be energized may be provided in each primary device 13. This switch may be provided in management device 8 adjacent to road 4 or near primary coil 11.

[0088] Furthermore, the power-transmitting-side resonant circuit 240 is not limited to a configuration where the primary coil 11 and the resonant capacitor are connected in series. The primary coil 11 and the resonant capacitor may be connected in parallel, or a combination of parallel and series connections may be used. In short, the power-transmitting-side resonant circuit 240 is configured such that the resonant frequency of the power-transmitting-side resonant circuit 240 matches the drive frequency of the inverter 220, and the connection relationship between its components is not particularly limited. This also applies to the power-receiving-side resonant circuit 410 of the vehicle 3.

[0089] The drive frequency of the inverter 220 is not limited to 85 kHz, and may be a frequency in the vicinity of 85 kHz. In short, the drive frequency of the inverter 220 may be a predetermined frequency band including 85 kHz.

[0090] Furthermore, the power transmission device 10 may have a configuration in which a plurality of inverters 220 are connected to an output-side power line (DC power line) of the PFC circuit 210 .

[0091] Furthermore, the foreign object detection device 140 is not limited to being located on the ground side, but may also be located on the vehicle 3 side. For example, if the foreign object detection device on the vehicle 3 side detects a foreign object or a living organism above the primary coil 11, the power supply request may be stopped until the vehicle 3 completely passes the primary coil 11.

[0092] In wireless power transmission system 1, information transmitted from vehicle 3 to supply device 5 using narrow-area wireless communication includes, in addition to vehicle identification information, a power supply request and a requested power supply value. The power supply request is information requesting power transmission from primary coil 11. The requested power supply value is the requested amount of power to be transmitted from supply device 5 to vehicle 3. Vehicle ECU 330 can calculate the requested power supply value based on the SOC (State of Charge) of battery 320.

[0093] Furthermore, the wireless power transmission system 1 is not limited to a method for supplying power from the ground to the vehicle 3, but can also realize a method for supplying power from the vehicle 3 to the ground. In this case, the rectifier circuit 430 can be replaced with an inverter to realize rectification during power supply and reception.

[0094] Figure 3 1 is a schematic diagram for explaining wide area wireless communication in the wireless power transmission system 1 .

[0095] In wireless power transmission system 1, vehicle 3 can communicate with server 30, and supply device 5 can communicate with server 30. Server 30 is connected to network 40 and can communicate with multiple vehicles 3 and multiple supply devices 5 via network 40. Network 40 is composed of a WAN (Wide Area Network) such as the Internet, a public communication network, or a mobile phone communication network.

[0096] The vehicle 3 is connected to the network 40 by wide area wireless communication using the third communication device 340. The vehicle 3 transmits information to the server 30 and receives information from the server 30.

[0097] The supply device 5 is connected to the network 40 by wide area wireless communication using the first communication device 120. The supply device 5 transmits information to the server 30 and receives information from the server 30.

[0098] Figure 4 1 is a block diagram showing the functional configuration of the power transmission ECU 110. The power transmission ECU 110 includes a first communication control unit 510, a second communication control unit 520, a power transmission control unit 530, and a matching confirmation unit 540. The matching confirmation unit 540 further includes a time measurement unit 541 and a calculation unit 542.

[0099] The first communication control unit 510 executes the first communication control for controlling the first communication device 120. The first communication control controls wide-area wireless communication on the supply device 5 side, controlling communication within the supply device 5 using the first communication device 120. Specifically, the first communication control controls communication with the management device 8 within the supply device 5. The first communication control controls communication between the supply device 5 and the network 40, and also controls communication between the supply device 5 and the server 30 via the network 40. The first communication control unit 510 is a SECC (Supply Equipment Communication Controller).

[0100] Second communication control unit 520 executes a second communication control for controlling second communication device 130. The second communication control controls narrow-area wireless communication on the supply device 5 side, controlling communication within supply device 5 using second communication device 130. Specifically, the second communication control controls communication within section 7 of supply device 5. The second communication control controls communication between supply device 5 and vehicle 3, without passing through network 40. Second communication control unit 520 is a Primary Device Communication Controller (PDCC).

[0101] The power transmission control unit 530 performs power transmission control for controlling the power transmission device 10. The power transmission control unit controls the power for transmission and controls the power converter 12 of the power transmission device 10. The power transmission control unit 530 performs power control for controlling the PFC circuit 210 and the inverter 220.

[0102] The matching confirmation unit 540 is a matching confirmation unit that can compare the information based on wide-area wireless communication received from the third communication device 340 of the vehicle 3 with the information based on narrow-area wireless communication received from the fourth communication device 350 of the vehicle 3, and determine the matching of the information of the wide-area wireless communication and the information of the narrow-area wireless communication by taking into account the delay time difference between the wide-area wireless communication and the narrow-area wireless communication calculated by the calculation unit 542.

[0103] The time measurement unit 541 is a time measurement unit that measures a difference duration during which the difference between the information of the wide area wireless communication and the information of the narrow area wireless communication lasts.

[0104] Calculation unit 542 is a calculation unit capable of calculating the moving average of the requested power values ​​included in the wide-area wireless communication information and the moving average of the requested power values ​​included in the narrow-area wireless communication information. Calculation unit 542 is also capable of calculating the delay time difference between the wide-area wireless communication and the narrow-area wireless communication.

[0105] Figure 5 3 is a block diagram showing the functional configuration of vehicle ECU 330 . Vehicle ECU 330 includes a third communication control unit 610 , a fourth communication control unit 620 , and a charging control unit 630 .

[0106] The third communication control unit 610 executes a third communication control for controlling the third communication device 340. The third communication control controls wide-area wireless communications on the vehicle 3 side, controlling communications within the vehicle 3 using the third communication device 340. The third communication control controls communications between the vehicle 3 and the network 40, and also controls communications between the vehicle 3 and the server 30 via the network 40. The third communication control unit 610 is an EVCC (EV Communication Controller).

[0107] Fourth communication control unit 620 executes fourth communication control for controlling fourth communication device 350. The fourth communication control controls narrow-area wireless communication on the vehicle 3 side, controlling communication within vehicle 3 using fourth communication device 350. The fourth communication control controls communication between vehicle 3 and supply device 5 without passing through network 40. Fourth communication control unit 620 is a Secondary Device Communication Controller (SDCC).

[0108] The charging control unit 630 performs charging control for the power receiving device 20 and the charging relay 310. This charging control includes power control for controlling the power received by the power receiving device 20 and relay control for controlling the connection between the secondary device 22 and the battery 320. The charging control unit 630 also performs power control for controlling the rectifier circuit 430. The charging control unit 630 also performs relay control for switching the charging relay 310 between open and closed states.

[0109] In the thus configured wireless power transmission system 1, wireless power transmission is performed from the supply device 5 to the vehicle 3 while wireless communication is established between the vehicle 3 and the supply device 5. With the vehicle 3 and the supply device 5 paired via wireless communication, power is transmitted contactlessly from the ground-side primary coil 11 to the vehicle-side secondary coil 21. Furthermore, within the vehicle 3, charging control is performed to supply the power received by the secondary coil 21 to the battery 320.

[0110] Next, refer to Figure 6 The power transmission process (D-WPT process) is described below. The power transmission process is structured as a chain of multiple activities and is derived from states and corresponding transitions.

[0111] Figure 6 This is a diagram for explaining the process of power transmission. Figure 6 The basic activities used to illustrate the power transmission process are shown. Figure 6 The thick arrows shown represent transfer lines. The state of the wireless power transmission system 1 during the power transmission process is represented by the activities constituting the power transmission process.

[0112] The activities that make up the power transmission process include the power transmission service session (D-WPT service session A70) as an activity during the power transmission phase, activities before the power transmission phase, and activities after the power transmission phase. Furthermore, activities can be described by distinguishing the main actions based on whether or not there is communication between the supply device 5 and the vehicle 3. Activities are categorized as activities that only indicate the status of the supply device 5 when there is no communication, activities that only indicate the status of the vehicle 3 when there is no communication, and activities that indicate the status of both the supply device 5 and the vehicle 3 when there is communication.

[0113] like Figure 6As shown, the activities include: Master power On state (Master power On) A10, Preparation (Preparation) A20, Waiting for a request from the vehicle 3 (Waiting for D-WPT service request) A30, Master power On state (Master power On) A40, Preparation (Preparation) A50, Communication setup (Communication setup) and D-WPT service request (Request D-WPT service) A60, D-WPT service session (D-WPT service session) A70, and Terminate D-WPT service session (Terminate D-WPT service session) A80.

[0114] Preparation A20 is the standby state of the supply device 5. In Preparation A20, the supply device 5 activates the circuit and verifies safety without communicating with the vehicle 3. When the main power supply enters the on state A10, the supply device 5 transitions to Preparation A20. If the supply device 5 activates the circuit and verifies safety during Preparation A20, the state transitions to Waiting for Request from Vehicle 3 A30. On the other hand, if a problem occurs with the supply device 5, the supply device 5 notifies the vehicle 3 via wide-area wireless communication that the wireless power transmission system 1 is unavailable (an unavailable notification). The first communication device 120 transmits the unavailable notification to the vehicle 3.

[0115] Preparation A50 is the preparation state of vehicle 3. In Preparation A50, vehicle 3 starts the circuit and verifies safety without communicating with supply device 5. When the main power supply enters the on state A40, vehicle 3 transitions to Preparation A50. If vehicle 3 starts the circuit and verifies safety in Preparation A50, the state transitions to Communication Setup and D-WPT Service Request A60. On the other hand, if there is a problem with vehicle 3, vehicle 3 does not initiate wide-area wireless communication and does not proceed with subsequent sequences in the D-WPT process.

[0116] The vehicle ECU 330 initiates the communication setup and D-WPT service request A60. During the communication setup and D-WPT service request A60, the vehicle ECU 330 initiates wide-area wireless communication. First, when vehicle 3 transitions from preparation A50 to communication setup and D-WPT service request A60, the third communication device 340 transmits a D-WPT service request signal. The third communication device 340 wirelessly communicates with the first communication device 120 corresponding to the D-WPT lane that vehicle 3 is scheduled to enter or has already entered. The first communication device 120 to be communicated with is selected based on the relative positional relationship between vehicle 3's current position and the D-WPT lane. On the supply device 5 side, while waiting for request A30 from vehicle 3, when the first communication device 120 receives the D-WPT service request signal, the state transitions to communication setup and D-WPT service request A60. Various information related to wide-area wireless communication and P2PS communication is linked using vehicle identification information. Figure 7 The processing sequence of the communication setup and D-WPT service request A60 is shown.

[0117] Figure 7 This is a sequence diagram showing a situation where communication using wide area wireless communication is implemented between the vehicle 3 and the supply device 5. The vehicle 3 transmits vehicle information to the server 30 (step S11). In step S11, the third communication device 340 of the vehicle 3 transmits the vehicle information to the server 30. The vehicle information includes vehicle identification information, various parameters of the power receiving device 20, the current position information of the vehicle 3, and the requested power. The vehicle ECU 330 calculates the requested power based on the SOC of the battery 320. In step S11, the vehicle ECU 330 transmits vehicle information from the third communication device 340 at predetermined intervals. The predetermined time is set based on the distance from the current position of the vehicle 3 to the starting point of the D-WPT lane. The shorter the distance from the vehicle 3 to the starting point of the D-WPT lane, the shorter the interval of the predetermined time.

[0118] Upon receiving the vehicle information from the vehicle 3, the server 30 determines the vehicle identification information of the vehicle 3 located within the vicinity of the supply device 5 based on the current location information of the vehicle 3 included in the vehicle information (step S12). In step S12, the server 30 determines that the vehicle 3 is located within a predetermined vicinity of the supply device 5 based on the current location information of the vehicle 3 and the location information of the supply device 5. The vicinity is set to, for example, an area within 500 meters.

[0119] When the server 30 identifies the vehicle identification information of the vehicle 3 , it transmits the vehicle information to the supply device 5 (step S13 ). In step S13 , the transmission device of the server 30 transmits the vehicle information to the supply device 5 .

[0120] Upon receiving the vehicle information from the server 30, the supply device 5 registers and deletes the vehicle identification information from the identification information list (step S14). In step S14, the power transmission ECU 110 registers and deletes the vehicle identification information from the identification information list so that the vehicle identification information associated with the vehicle information is registered in the identification information list in the correct order.

[0121] When registering or deleting the vehicle identification information in the identification information list, the supply device 5 transmits the vehicle identification information registered in the identification information list to the server 30 (step S15 ). In step S15 , the first communication device 120 of the supply device 5 transmits the vehicle identification information to the server 30 .

[0122] Furthermore, upon receiving the vehicle identification information from the supply device 5, the server 30 transmits a list registration notification to the vehicle 3 corresponding to the vehicle identification information registered in the identification information list (step S16). In step S16, the communication device of the server 30 transmits the list registration notification to the vehicle 3. The list registration notification indicates that the vehicle identification information has been registered in the identification information list and includes the identification information of the supply device 5 and the location information of the supply device 5.

[0123] Thus, when vehicle 3 starts wide-area wireless communication and both the supply device 5 and vehicle 3 enter the state of communication setup and D-WPT service request A60, communication setup via wide-area wireless communication is successful. Due to the successful communication setup, the state transitions to D-WPT service session A70.

[0124] return Figure 6 With a communication connection established between the supply device 5 and the vehicle 3, the D-WPT service session A70 transmits power contactlessly from the power-transmitting resonant circuit 240 of the supply device 5 to the power-receiving resonant circuit 410 of the vehicle 3. The D-WPT service session A70 begins with successful communication setup and ends with the termination of communication. When communication ends in the D-WPT service session A70 state, the state transitions to D-WPT service session termination A80.

[0125] During the D-WPT service session termination A80, vehicle 3 terminates wide-area wireless communication with supply device 5. Vehicle 3 and supply device 5 can receive the trigger signal for the termination of D-WPT service session A70. Furthermore, vehicle ECU 330 does not initiate D-WPT with secondary device 22 or vehicle 3 until third communication device 340 receives the next notification (D-WPT service request signal).

[0126] Here, detailed operations of the D-WPT service session A70 are described.

[0127] The D-WPT service session A70 includes: compatibility check (Compatibility check) and service authentication (Service authentication) A110, detailed lateral vehicle positioning (Fine Positioning) A120, pairing (Pairing) and alignment check (Alignment check) A130, magnetic coupling check (Magnetic Coupling Check) A140, perform power transfer (Perform Power Transfer) A150, stand-by (Stand-by) A160, and terminate power transfer (Power transfer terminated) A170.

[0128] The compatibility check and service authentication A110 are described below. After successful communication setup, the vehicle ECU 330 and the power transmission ECU 110 confirm compatibility between the primary device 13 and the secondary device 22. The supply device 5 performs a compatibility check based on information corresponding to the vehicle identification information acquired through communication. Examples of inspection items include the minimum ground clearance of the secondary device 22, the shape and type of the secondary device 22, the circuit topology of the secondary device 22, the self-resonant frequency of the secondary device 22, and the number of secondary coils 21.

[0129] In the compatibility check and service authentication A110, vehicle 3 first transmits compatibility information (comatibility information) of power receiving device 20 from third communication device 340 to supply device 5. Supply device 5's first communication device 120 receives the compatibility information from vehicle 3's power receiving device 20. Furthermore, supply device 5's first communication device 120 transmits the compatibility information of power transmitting device 10 to vehicle 3. Vehicle 3's third communication device 340 receives the compatibility information from power transmitting device 10.

[0130] The elements of the compatibility information sent by the vehicle 3 to the supply device 5 include vehicle identification information, WPT power classes (WPT Power Classes), air gap class (Air Gap Class), WPT operating frequencies (WPT Operating Frequencies), WPT frequency adjustment, WPT type (WPT Type), WPT circuit topology (WPT Circuit Topology), detailed positioning method (Fine Positioning Method), pairing method (Pairing Method), alignment method (Alignment Method), and information on whether or not a power adjustment function is available.

[0131] The elements of the compatibility information sent by the supply device 5 to the vehicle 3 include supply device identification information, WPT power level, gap level, WPT drive frequency, WPT frequency adjustment, WPT type, WPT circuit topology, detailed alignment method, pairing method, alignment method, and information on whether there is a power adjustment function.

[0132] Each element of the compatibility information sent from the vehicle 3 to the supply device 5 will be described, and descriptions of elements of the compatibility information sent from the supply device 5 to the vehicle 3 that overlap with those of the compatibility information sent from the vehicle 3 to the supply device 5 will be omitted.

[0133] The gap level is information indicating the gap level at which the secondary device 22 can receive power. The WPT power level is information indicating the power level at which the secondary device 22 can receive power. The WPT drive frequency is information indicating the frequency of the power received by the secondary device 22. The WPT frequency adjustment is information indicating whether the drive frequency can be adjusted. The WPT type is information indicating the shape type of the secondary device 22, indicating the coil shape of the secondary coil 21. Types indicating the WPT type include circular and solenoid. The WPT circuit topology is information indicating the connection structure between the secondary coil 21 and the resonant capacitor. WPT circuit topologies include series and parallel. The detailed alignment method is information indicating how alignment is performed during alignment. The pairing method is a method for implementing pairing of the vehicle 3 to determine the supply device 5. The alignment method indicates a method for confirming the relative positions of the secondary device 22 and the primary device 13 before power transmission begins.

[0134] The detailed lateral vehicle alignment A120 will be described. Vehicle 3 performs detailed lateral vehicle alignment A120 before or in parallel with pairing and alignment check A130. The vehicle ECU 330 begins detailed lateral vehicle alignment A120 when it determines that vehicle 3 is approaching or entering the area (WPT lane) where the supply device 5 is located.

[0135] The vehicle ECU 330 guides the vehicle 3 and aligns the primary device 13 and the secondary device 22 within a range in which sufficient magnetic coupling for wireless power transmission is established.

[0136] The detailed lateral vehicle alignment A120 is basically performed manually or automatically on the vehicle 3 side. The detailed lateral vehicle alignment A120 can be coordinated with an ADAS (Advanced Driver Assistance System). The end of this communication is the end A80 of the D-WPT service session.

[0137] Furthermore, detailed alignment A120 activity in the lateral direction of the vehicle can continue until the vehicle 3 leaves the D-WPT charging station or the state changes to communication end, and is executed based on the alignment information sent from the supply device 5 to the vehicle 3 via wide area wireless communication.

[0138] The pairing and alignment inspection A130 will be described. Here, the pairing and alignment inspection will be described separately.

[0139] The P2PS interface for narrow-area wireless communication ensures that the primary device 13 and the secondary device 22 are uniquely paired. The pairing state progresses as follows.

[0140] First, the vehicle ECU 330 identifies that vehicle 3 is approaching or entering a D-WPT lane. For example, the vehicle ECU 330 has map information containing D-WPT lanes and compares it with the vehicle's location information obtained by the GPS receiver 360, identifying the approach or entry based on the straight-line distance, etc. Vehicle 3 transmits to the server 30 via wide-area wireless communication which D-WPT lane it is approaching. In short, the third communication device 340 notifies the cloud of a signal indicating that vehicle 3 is approaching a particular D-WPT lane. Furthermore, when the vehicle ECU 330 identifies vehicle 3's approach or entry into a D-WPT lane, the fourth communication device 350 begins transmitting modulated signals at regular intervals for pairing between the primary device 13 and the secondary device 22.

[0141] Alternatively, the supply device 5 can use information obtained from the server 30 via wide-area wireless communication to identify when a vehicle 3 is approaching or entering a D-WPT lane. The server 30 distributes the vehicle identification information of each vehicle 3 approaching the D-WPT lane to the supply device 5 corresponding to that lane. The supply device 5 only needs to refer to the reduced number of vehicle identification information provided by the server 30, enabling authentication to be performed in a shorter period of time. When the supply device 5 identifies that a vehicle 3 is approaching a D-WPT lane, the second communication device 130 enters standby mode. In standby mode, the supply device waits for receipt of a modulated signal from the fourth communication device 350 of the vehicle 3. This modulated signal includes vehicle identification information.

[0142] When the second communication device 130 receives the modulated signal from the vehicle 3, the supply device 5 compares the vehicle identification information received via the narrow-area wireless communication with the vehicle identification information in the identification information list obtained from the results of the wide-area wireless communication with the plurality of vehicles 3 traveling toward the D-WPT lane. Through this comparison, the supply device 5 identifies the vehicle 3.

[0143] When the vehicle ECU 330 recognizes that the vehicle 3 is outside the D-WPT lane, it stops transmission of the modulated signal from the fourth communication device 350. The vehicle ECU 330 can determine whether the vehicle 3 has passed the D-WPT lane based on map information and the vehicle's position information.

[0144] When the supply device 5 determines that the vehicle 3 is not traveling on the D-WPT lane or when the supply device 5 determines that the vehicle 3 is not approaching the D-WPT lane, it stops and waits for the modulated signal from the fourth communication device 350 .

[0145] Pairing is performed on the primary device 13 until the vehicle 3 leaves the D-WPT charging station or the status changes to communication ended. When pairing is completed, the status transitions to alignment check.

[0146] The alignment check is explained below. The purpose of the alignment check is to confirm whether the lateral distance between the primary device 13 and the secondary device 22 is within the allowable range. The alignment check is performed using narrow area wireless communication (P2PS).

[0147] The alignment check is continuously performed based on P2PS until the vehicle 3 leaves the D-WPT charging station or the status changes to communication end. The alignment check result can be transmitted from the first communication device 120 to the third communication device 340 via wide area wireless communication.

[0148] The magnetic coupling check A140 will be described. In the magnetic coupling check A140, the supply device 5 checks the magnetic coupling state to confirm whether the secondary device 22 is within the allowable range. When the magnetic coupling check A140 is completed, the state shifts to the power transmission execution A150.

[0149] Power transmission execution A150 will be described. In this state, the supply device 5 transmits power to the power receiving device 20. To ensure the effectiveness of MF-D-WPT and protect the power receiving device 20 and battery 320, the power transmitting device 10 and the power receiving device 20 must be capable of controlling the amount of power transmitted (both transmitted and received). Greater power transmission helps extend the travel range of the power receiving device 20 without requiring static wireless charging or conductive charging. However, the capacity of the battery 320 varies depending on the vehicle type, and the driving power demand can sometimes fluctuate dramatically. An example of such a sudden change is sudden regenerative braking. When regenerative braking is applied while traveling on a D-WPT lane, regenerative braking takes priority, so in addition to the regenerative power, power received from the power receiving device 20 is supplied to the battery 320. In this case, the power transmitted by the power receiving device 20 must be adjusted to protect the battery 320 from overcharging.

[0150] Regardless of the need for power control, communication between the supply device 5 and the power receiving device 20 will not be resumed in this state. This is because the instability and latency of communication can compromise the responsiveness and accuracy of power control. Therefore, the supply device 5 and the power receiving device 20 perform power transmission and control based on the information known up to this point.

[0151] The supply device 5 uses wide area wireless communication in advance to increase the transmission power for the magnetic coupling test in response to the power request sent from the third communication device 340. The supply device 5 keeps the fluctuation of current and voltage within the range and attempts to maximize the power transmitted during the transfer.

[0152] The power receiving device 20 receives the transmitted power from the power transmitting device 10 essentially without any control. However, if the transmitted power, such as the rated power of the battery 320, which varies depending on the state of charge and the power demand for driving the vehicle 3, exceeds or is about to exceed a limit, the power receiving device 20 initiates control. Furthermore, the power control in the vehicle ECU 330 must also address malfunctions in wide-area wireless communications. Such malfunctions can lead to conflicts between the power control target in the primary device 13 and the request from the third communication device 340, or even sudden failures of the power receiving device 20 or the battery 320 during power transmission. The power receiving device 20 controls the power transmitted at the power request rate notified by the first communication device 120.

[0153] The power request is determined based on compatibility check information such as the WPT circuit topology, geometry, ground clearance, and EMC (electromagnetic compatibility) of the vehicle 3 and primary device 13. The magnetic field varies according to these specifications, and power must be transmitted within the EMC range.

[0154] The power control in the power transmitting ECU 110 and the power receiving device 20 may interfere with each other. This interference is particularly likely to occur if the supply device 5 attempts to implement a power request greater than the current power limit in the power receiving device 20 via wide-area wireless communication. An example of this is the rapid regeneration control of the relatively small battery 320 in the vehicle 3. If possible, it is desirable for the supply device 5 to detect a mismatch between the power control target and the limit and adjust power transmission to resolve the mismatch.

[0155] For example, if foreign object detection device 14 detects a foreign object on primary device 13, or if magnetic coupling decreases due to poor alignment of secondary device 22, and power transmission is briefly interrupted while secondary device 22 remains on primary device 13, the state transitions to standby mode A160. Furthermore, if a foreign object detection device is installed on vehicle 3, foreign objects can also be detected on the vehicle 3 side.

[0156] When the secondary device 22 passes over the primary device 13, the state transitions to the power transmission end state A170. In this state, the magnetic coupling between the two devices weakens, and the amount of power transmitted decreases. The supply device 5 can detect this weakening of magnetic coupling by monitoring the transmitted power. Therefore, the supply device 5 essentially decides to transition to the power transmission end state A170 and then begins reducing the voltage to stop power transmission.

[0157] The standby state A160 will be described. In this state, if power transmission is temporarily interrupted for some reason, and D-WPT preparation is complete in both the vehicle 3 and the supply device 5, the state returns to the power transmission execution state A150. If there is a possibility of power transmission being interrupted, the state returns to the standby state A160.

[0158] The end of power transmission A170 will be described below. In this state, the supply device 5 reduces the transmitted power to zero and stores or uploads power transmission result data, such as total transmitted power, power transmission efficiency, and fault history. Each data item is tagged with vehicle identification information. Finally, the supply device 5 deletes the vehicle identification information of vehicle 3 that passed through the D-WPT lane. This allows the supply device 5 to prepare for subsequent pairing and power transmission with other vehicles. Figure 8 This shows the processing sequence of the power transmission termination A170.

[0159] Figure 8This is a sequence diagram showing the operations after power supply from the supply device 5 to the vehicle 3 while the vehicle is traveling has completed power supply. When power reception from the supply device 5 is completed at the power receiving device 20 of the vehicle 3 (step S21), the vehicle 3 transmits power reception completion information to the server 30 (step S22). In step S22, the power reception completion information is transmitted from the third communication device 340 of the vehicle 3. The power reception completion information, which is information related to power reception from the supply device 5, includes, for example, vehicle identification information of the vehicle 3, the power received from the supply device 5, power reception efficiency, and abnormality detection results.

[0160] When the supply device 5 performs step S21, it terminates power supply to the vehicle 3 (step S23). Steps S21 and S23 may or may not be performed simultaneously. When step S23 is performed, the supply device 5 transmits power supply termination information to the server 30 (step S24). In step S24, the power supply termination information is transmitted from the first communication device 120 of the supply device 5.

[0161] Upon receiving the power reception completion information from vehicle 3 and the power transmission completion information from supply device 5, server 30 performs power supply completion processing to terminate the power supply from supply device 5 to vehicle 3 (step S25). In the power supply completion processing, based on the power reception completion information and the power transmission completion information, the amount of power supplied from supply device 5 to vehicle 3 is calculated, and the user of vehicle 3 is charged based on the calculated amount of power supplied.

[0162] In addition, the vehicle 3 transmits the vehicle information to the server 30 independently of the power supply end process (step S26). In step S26, the vehicle information is transmitted from the third communication device 340 of the vehicle 3.

[0163] Upon receiving the vehicle information from the vehicle 3 after executing the power supply end process, the server 30 identifies the vehicle identification information of the vehicle 3 located in the vicinity of each supply device 5 based on the vehicle information (step S27 ).

[0164] Furthermore, when the power supply termination process for a certain vehicle 3 has been performed in a certain supply device 5, the server 30 deletes the vehicle identification information of the vehicle 3 for which the power supply termination process has been performed from the vehicle identification information of the vehicles 3 in the vicinity of the supply device 5 determined in the process of step S27 (step S28).

[0165] Then, the server 30 transmits the vehicle information associated with the vehicle identification information of the vehicles 3 identified as being located in the vicinity of each supply device 5 and not deleted in the process of step S28 to each supply device 5 (step S29).

[0166] After the vehicle information is sent to each supply device 5 in the process of step S29, when the supply device 5 receives the vehicle information from the server 30, the supply device 5 registers and deletes the vehicle identification information in the identification information list (step S30). Figure 7 The process of step S14 in the process of the supply device 5 is the same. Then, the supply device 5 sends the vehicle identification information registered in the identification information list to the server 30 (step S31). The process of step S31 is the same as Figure 7 The processing of step S15 in is the same.

[0167] Furthermore, when the server 30 receives the vehicle identification information from the supply device 5, it sends a list registration notification to the vehicle 3 corresponding to the vehicle identification information registered in the identification information list (step S32). Figure 7 The processing of step S16 in is the same.

[0168] As a result, in the Figure 8 In the illustrated process, the vehicle identification information of vehicles 3 located in the vicinity of each supply device 5, whose power supply from that supply device 5 has not yet ended and whose vehicle identification information has not been requested to be erased, is registered in the identification information list. Furthermore, vehicle 3 receives a list registration notification when its vehicle identification information is registered in the identification information list of a particular supply facility 2. Therefore, by receiving the list registration notification, vehicle ECU 330 can determine that the vehicle is registered with a particular supply device 5. Furthermore, if vehicle 3 exits the vicinity of a supply device 5, the vehicle identification information of that vehicle 3 is erased from the identification information list of the supply device 5.

[0169] return Figure 6 In addition, at the end of power transmission A170, the power receiving device 20 does not need to perform any processing to make the transmission power zero. The P2PS interface is kept active when the vehicle 3 is in the D-WPT lane, and the state of the power receiving device 20 automatically shifts to pairing in order to transmit power from the next primary device 13. Figure 6 As shown in the transition line, the state is transferred from the end of power transmission A170 to the pairing and alignment check A130. Figure 6 As shown, when a predetermined transition condition is satisfied, the process can be transferred from magnetic coupling check A140 to pairing and alignment check A130 or from power transmission execution A150 to pairing and alignment check A130. Pairing can be performed for multiple primary coils 11 individually or collectively at a representative point.

[0170] Furthermore, if there is no D-WPT request from the vehicle ECU 330, or if the series of states from communication setup and D-WPT service request A60 to power transmission termination A170 is prohibited, the D-WPT service session A70 transitions to D-WPT service session termination A80, terminating wide-area wireless communication between the first communication device 120 and the third communication device 340. For example, D-WPT is terminated when the battery 320's state of charge is too high or when the power receiving device 20 overheats due to continued power transmission. Such unnecessary D-WPT can be disabled simply by deactivating the P2PS interface. However, by terminating wide-area wireless communication, the power transmitting ECU 110 terminates the established wide-area wireless communication, eliminating the need for D-WPT and freeing up memory used for the vehicle 3.

[0171] In addition, the D-WPT service session A70 is not limited to Figure 6 The transition is as shown in the transition line. In the D-WPT service session A70, when the activities after the pairing and alignment check A130 end, if the conditions for the power transmission process to remain in the D-WPT service session A70 are met, the state does not transition to the end of the D-WPT service session A80, but instead transitions to the compatibility check and service authentication A110. For example, in the state of the magnetic coupling check A140, if the predetermined transition conditions are met, the state can transition to the compatibility check and service authentication A110.

[0172] In the wireless power transmission system 1 of the embodiment, the power transmitting ECU 110 uses the matching confirmation unit 540 to compare wide-area wireless communication information with narrow-area wireless communication information, and determines the consistency of the wide-area wireless communication information with the narrow-area wireless communication information, taking into account the calculated delay time difference between the wide-area wireless communication and the narrow-area wireless communication. If the wide-area wireless communication information matches the narrow-area wireless communication information, the power transmitting ECU 110 performs power transmission (power supply operation) from the supply device 5 to the power receiving device 20 (vehicle 3). On the other hand, if the wide-area wireless communication information and the narrow-area wireless communication information differ in content and do not match, the power transmitting ECU 110 performs a predetermined action. This mismatch includes various types of mismatches, such as when the same information, such as power request information and power transfer termination information, is transmitted and received via wide-area wireless communication and narrow-area wireless communication, but the values ​​differ, and when the status and communication content differ.

[0173] In the wireless power transmission system 1 of the embodiment, as the predetermined measure, for example, power transmission (power supply operation) from the supply device 5 to the power receiving device 20 may be performed based on information from the narrow-area wireless communication. This allows power transmission (power supply operation) from the supply device 5 to the power receiving device 20 at a power level close to the actual power requested by the vehicle 3 to be performed even if wide-area wireless communication is interrupted due to a failure in the network 40 or the like, resulting in the aforementioned mismatch. In this case, power transmission from the supply device 5 to the power receiving device 20 may be suspended if recovery of the wide-area wireless communication is not anticipated.

[0174] Furthermore, in the wireless power transmission system 1 of the embodiment, as the predetermined process described above, power transmission (power supply operation) from the supply device 5 to the power receiving device 20 may be performed based on, for example, new information from either the wide-area wireless communication information or the narrow-area wireless communication information. This allows power transmission (power supply operation) from the supply device 5 to the power receiving device 20 to be performed based on the new information in a timely manner.

[0175] Furthermore, in the wireless power transmission system 1 of the embodiment, as the predetermined measure, for example, power transmission (power supply operation) from the supply device 5 to the power receiving device 20 may be performed using the smaller of the power request value included in the wide-area wireless communication information and the power request value included in the narrow-area wireless communication information as the target power value. This can prevent overcharging of the storage battery 320.

[0176] In the wireless power transmission system 1 of the embodiment, as the predetermined measure, for example, if the wide area wireless communication information does not match the narrow area wireless communication information, it is determined to be abnormal and the power transmission (power supply operation) is stopped. This can prevent overcharging of the battery 320.

[0177] Furthermore, in the wireless power transmission system 1 of the embodiment, the matching confirmation unit 540 may compare the average values ​​of the requested power values ​​contained in the wide-area wireless communication information and the requested power values ​​contained in the narrow-area wireless communication information, sampled at a certain time interval, rather than comparing the requested power values ​​contained in the wide-area wireless communication information and the requested power values ​​contained in the narrow-area wireless communication information at a specific time. For example, the matching confirmation unit 540 may determine the matching by comparing the moving average values ​​of the requested power values ​​contained in the wide-area wireless communication information and the moving average values ​​of the requested power values ​​contained in the narrow-area wireless communication information, calculated by the calculation unit 542. This allows for appropriate matching even when the requested power values ​​contained in the narrow-area wireless communication information fluctuate frequently.

[0178] Furthermore, in the wireless power transmission system 1 of the embodiment, the matching confirmation unit 540 may determine a mismatch if the requested power value included in the wide-area wireless communication information and the requested power value included in the narrow-area wireless communication information are outside a predetermined range relative to one of the requested power values. For example, it may be that the wide-area wireless communication is delayed relative to the narrow-area wireless communication, or that the vehicle 3 frequently engages and disengages the accelerator and then the brake, while the requested power value included in the narrow-area wireless communication information changes instantly, for example, in units of tens of milliseconds. Therefore, when comparing the requested power values ​​included in the wide-area wireless communication information with the requested power values ​​included in the narrow-area wireless communication information, if, for example, the requested power value included in the wide-area wireless communication information is within ±20% of the requested power value in the narrow-area wireless communication information, the matching confirmation unit 540 determines a match. On the other hand, if the requested power value included in the wide-area wireless communication information is outside the ±20% range relative to the requested power value in the narrow-area wireless communication information, the matching confirmation unit 540 determines a mismatch.

[0179] Furthermore, in the wireless power transmission system 1 of the embodiment, when the supply device 5 obtains a requested power value from the fourth communication device 350 of the vehicle 3 via narrow-area wireless communication via the second communication device 130, a period (e.g., 1 to 10 seconds) may be set to prohibit changes to the requested power value from the time of acquisition. This allows for appropriate determination of compatibility even when the requested power value included in the narrow-area wireless communication information frequently fluctuates.

[0180] Furthermore, in the wireless power transmission system 1 of the embodiment, the match confirmation unit 540 determines that there is a mismatch when the difference between the information in the wide-area wireless communication and the information in the narrow-area wireless communication, as measured by the time measurement unit 541, continues for a period exceeding a predetermined time. For example, when the difference between the requested power value included in the wide-area wireless communication information and the requested power value included in the narrow-area wireless communication information continues for a period exceeding a predetermined time, the match confirmation unit 540 determines that the requested power value included in the wide-area wireless communication information and the requested power value included in the narrow-area wireless communication information do not match.

[0181] Furthermore, in the wireless power transmission system 1 of the embodiment, when narrow-area wireless communication is interrupted, the power transmission from the supply device 5 to the vehicle 3 may be immediately stopped.

[0182] Furthermore, when the SOC of the battery 320 included in the vehicle 3 is equal to or lower than a predetermined value, power may be unconditionally transmitted from the supply device 5 to the vehicle 3 regardless of the communication status of the wide area wireless communication and the narrow area wireless communication.

[0183] Figure 9 This is a flowchart showing a first example of control for performing power transmission by comparing information on wide-area wireless communication with information on narrow-area wireless communication.

[0184] First, the supply device 5 obtains requested power value A as wide-area wireless communication information from the third communication device 340 of the vehicle 3 via the first communication device 120 (step S41). Next, the supply device 5 obtains requested power value B as narrow-area wireless communication information from the fourth communication device 350 of the vehicle 3 via the second communication device 130 (step S42). Next, the supply device 5 uses the matching confirmation unit 540 of the power transmission ECU 110 to determine whether requested power value A ≠ requested power value B (step S43). If the supply device 5 determines that requested power value A ≠ requested power value B, that is, if requested power value A and requested power value B do not match (yes in step S43), it performs power transmission using requested power value B as the target power value (step S44). Next, based on the time measured by the time measurement unit 541, the supply device 5 determines whether the requested power value A ≠ requested power value B has continued for a predetermined period of time (step S45). If the supply device 5 determines that the requested power value A ≠ the requested power value B has not continued for the predetermined time (No in step S45), the series of controls ends. On the other hand, if the supply device 5 determines that the requested power value A ≠ the requested power value B has continued for the predetermined time (Yes in step S45), the supply device 5 enters a standby mode (step S46). The supply device 5 then ends the series of controls.

[0185] If, in step S43, the supply device 5 determines that requested power value A does not ≠ requested power value B, that is, requested power value A and requested power value B are consistent (No in step S43), it performs power transmission using requested power value A (=requested power value B) as the target power value (step S47). The supply device 5 then terminates the series of control operations.

[0186] Thus, in the wireless power transmission system 1 of the embodiment, it is possible to transmit electric power from the supply device 5 to the vehicle 3 so as to ensure an amount of electric power close to the actual requested amount.

[0187] Figure 10 This is a flowchart showing a second example of control for performing power transmission by comparing information on wide-area wireless communication with information on narrow-area wireless communication.

[0188] First, the supply device 5 obtains requested power value A as wide-area wireless communication information from the third communication device 340 of the vehicle 3 via the first communication device 120 (step S51). Next, the supply device 5 obtains requested power value B as narrow-area wireless communication information from the fourth communication device 350 of the vehicle 3 via the second communication device 130 (step S52). Next, the supply device 5 uses the matching confirmation unit 540 of the power transmission ECU 110 to compare requested power value A with requested power value B, and uses the smaller one as the target power value for power transmission (step S53). Next, based on the time measured by the time measurement unit 541, the supply device 5 determines whether the requested power value A ≠ requested power value B has continued for a predetermined time (step S54). If the supply device 5 determines that the requested power value A ≠ requested power value B has not continued for the predetermined time (no in step S54), the series of control steps ends. On the other hand, if the supply device 5 determines that the requested power value A≠the requested power value B has continued for the predetermined time (YES in step S54 ), it shifts to standby mode (step S55 ) and ends the series of controls.

[0189] Thus, in the wireless power transmission system 1 of the embodiment, it is possible to suppress the power transmission from the supply device 5 to the vehicle 3 with an excessive amount of power, thereby suppressing the battery 320 from being overcharged.

[0190] Industrial Applicability

[0191] The present invention can provide a non-contact power supply system, a power supply device, and a power receiving device during driving that can perform predetermined processing according to the compatibility between information of wide-area wireless communication and information of narrow-area wireless communication.

[0192] Description of Reference Numerals

[0193] 1 Wireless Power Transmission System

[0194] 2 Supply equipment

[0195] 3 vehicles

[0196] 4 Road

[0197] 5 Supply device

[0198] 6 AC power supply

[0199] 10 Power transmission device

[0200] 11 Primary coil

[0201] 20 Power receiving device

[0202] 21 Secondary coil

[0203] 120 first communication device

[0204] 130 Second communication device

[0205] 340 Third Communication Device

[0206] 350 Fourth Communication Device

[0207] 320 battery

[0208] 540 Matching Confirmation Department

[0209] 541 Time Measurement Department

[0210] 542 Computing Department.

Claims

1. A non-contact power supply system for driving a vehicle equipped with a vehicle-side power receiving device, wherein power is supplied non-contactly from a road-side power supply device to a driving vehicle, wherein: The road-side power supply device includes: a first communication device for performing wide-area wireless communication between the first communication device and the vehicle-side power receiving device; and a second communication device for performing narrow-area wireless communication between the second communication device and the vehicle-side power receiving device, wherein the narrow-area wireless communication can transmit less information than the wide-area wireless communication and has a faster response speed than the wide-area wireless communication. The vehicle-side power receiving device includes: a third communication device for performing the wide-area wireless communication between the third communication device and the road-side power supply device; and a fourth communication device for performing the narrow-area wireless communication between the fourth communication device and the road-side power supply device. The road-side power supply device includes a matching confirmation unit that compares the information of the wide-area wireless communication sent from the third communication device and obtained by the first communication device with the information of the narrow-area wireless communication sent from the fourth communication device and obtained by the second communication device, and is capable of determining the matching between the information of the wide-area wireless communication and the information of the narrow-area wireless communication by taking into account a delay time difference between the wide-area wireless communication and the narrow-area wireless communication. The matching confirmation unit compares the information of the wide area wireless communication with the information of the narrow area wireless communication, When the information of the wide area wireless communication matches the information of the narrow area wireless communication, power supply is performed from the road-side power supply device to the vehicle-side power receiving device. When the information of the wide-area wireless communication does not match the information of the narrow-area wireless communication, a predetermined process determined in advance is performed.

2. The non-contact power supply system during driving according to claim 1, characterized in that: The matching confirmation unit has a time measurement unit that measures a difference duration time during which a difference between the information of the wide-area wireless communication and the information of the narrow-area wireless communication lasts. When the difference duration exceeds a predetermined time, the matching confirmation unit determines that the information of the wide area wireless communication and the information of the narrow area wireless communication do not match.

3. The non-contact power supply system during driving according to claim 1, characterized in that: The wide area wireless communication information and the narrow area wireless communication information each include a requested power value, The matching confirmation unit determines that there is a mismatch when there is a difference between the requested power value included in the information of the wide area wireless communication and the requested power value included in the narrow area wireless communication.

4. The non-contact power supply system during driving according to claim 3, characterized in that: The matching confirmation unit includes a calculation unit capable of calculating a moving average of the requested power value included in the information of the wide area wireless communication and a moving average of the requested power value included in the information of the narrow area wireless communication, respectively. The matching confirmation unit compares a moving average value of the requested power value included in the information of the wide area wireless communication with a moving average value of the requested power value included in the information of the narrow area wireless communication to determine the matching.

5. The non-contact power supply system during driving according to claim 4, characterized in that: The matching confirmation unit determines that the requested power value included in the wide area wireless communication information and the requested power value included in the narrow area wireless communication information are matched when the requested power value of one is within a preset range.

6. The non-contact power supply system during driving according to claim 3, characterized in that: As the predetermined measure, power supply from the roadside power supply device to the vehicle-side power receiving device is performed using the smaller of the power request value included in the wide-area wireless communication information and the power request value included in the narrow-area wireless communication information as a target power value.

7. The non-contact power supply system for traveling according to any one of claims 1 to 5, characterized in that: When the wide area wireless communication information does not match the narrow area wireless communication information, the predetermined action is to perform power supply from the roadside power feeding device to the vehicle side power receiving device based on the narrow area wireless communication information.

8. The non-contact power supply system for traveling according to any one of claims 1 to 5, characterized in that: When the information of the wide area wireless communication does not match the information of the narrow area wireless communication, the predetermined action is to stop the power supply operation from the road-side power supply device to the vehicle-side power receiving device.

9. The non-contact power supply system for traveling according to any one of claims 1 to 5, characterized in that: When the information of the wide-area wireless communication does not match the information of the narrow-area wireless communication, as the predetermined procedure, power supply from the road-side power supply device to the vehicle-side power receiving device is performed based on a newer one of the information of the wide-area wireless communication and the information of the narrow-area wireless communication.

10. A power supply device for supplying electric power in a contactless manner to a moving vehicle equipped with a vehicle-side power receiving device, the power supply device being installed on a road on which the vehicle is traveling, wherein: The power supply device includes: a first communication device for performing wide-area wireless communication between the first communication device and a third communication device of the vehicle-side power receiving device; and a second communication device for performing narrow-area wireless communication between the second communication device and a fourth communication device of the vehicle-side power receiving device, wherein the narrow-area wireless communication can transmit less information than the wide-area wireless communication and has a faster response speed than the wide-area wireless communication. The power supply device includes a matching confirmation unit that compares the information of the wide-area wireless communication sent from the third communication device and obtained by the first communication device with the information of the narrow-area wireless communication sent from the fourth communication device and obtained by the second communication device, and is capable of determining matching between the information of the wide-area wireless communication and the information of the narrow-area wireless communication by taking into account a delay time difference between the wide-area wireless communication and the narrow-area wireless communication. The matching confirmation unit compares the information of the wide area wireless communication with the information of the narrow area wireless communication, When the information of the wide-area wireless communication matches the information of the narrow-area wireless communication, the power supply device performs power supply to the vehicle-side power receiving device. When the information of the wide area wireless communication does not match the information of the narrow area wireless communication, the power supply device performs a predetermined action determined in advance.

11. A power receiving device mounted on a vehicle that receives power supplied in a contactless manner from a road-side power supply device while the vehicle is traveling, wherein: The power receiving device includes: a third communication device for performing wide-area wireless communication with the first communication device of the road-side power supply device; and a fourth communication device for performing narrow-area wireless communication with the second communication device of the road-side power supply device, wherein the narrow-area wireless communication can transmit less information than the wide-area wireless communication and has a faster response speed than the wide-area wireless communication. The road-side power supply device has a matching confirmation unit that compares the information of the wide-area wireless communication sent from the third communication device and obtained by the first communication device with the information of the narrow-area wireless communication sent from the fourth communication device and obtained by the second communication device, and is capable of determining the matching between the information of the wide-area wireless communication and the information of the narrow-area wireless communication by taking into account the delay time difference between the wide-area wireless communication and the narrow-area wireless communication. The matching confirmation unit compares the information of the wide-area wireless communication with the information of the narrow-area wireless communication. When the information of the wide area wireless communication matches the information of the narrow area wireless communication, a power supply operation is performed to receive electric power from the vehicle-side power receiving device. When the information of the wide-area wireless communication does not match the information of the narrow-area wireless communication, the roadside power feeding device performs a predetermined action determined in advance.

Images