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

Abstract

In this non-contact power supply system during travel, road-side power supply devices provided in a plurality of lanes of a road have a first communication device that performs wide-area wireless communication and a second communication device that performs narrowband wireless communication. The vehicle-side power receiving device is provided with a third communication device that performs wide-area wireless communication, and a fourth communication device that performs narrowband wireless communication. Each of the road-side power supply devices has a sharing means capable of sharing the vehicle-related information acquired by the second communication device from the third communication device with each other, and a determination means for determining the lane on which the vehicle is traveling on the basis of the vehicle-related information shared by the sharing means. A road-side power supply device provided in a lane in which the vehicle is determined to be traveling is paired with a vehicle-side power reception device.

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 in which a power supply processing unit sets the pulse width of pulsed power transmitted from a power transmission device to a specific pulse width that is different for each power transmission device based on the presence of a detected vehicle. A wireless communication device receives information related to the specific pulse width of power received from the vehicle. The power supply processing unit performs pairing based on the correspondence between the power transmission device and the vehicle corresponding to the power transmission device, and the information related to the set specific pulse width and the received specific pulse width.

[0003] Prior art literature

[0004] Patent Document 1: Japanese Patent Application No. 2019-526219 Summary of the Invention

[0005] Problems to be solved by the invention

[0006] In a non-contact power supply system for supplying power from a road-side power supply device to a moving vehicle equipped with a vehicle-side power receiving device, there is room for improvement in the method of pairing a vehicle traveling on a road with multiple lanes with a road-side power supply device located in a particular lane, for example, when changing lanes.

[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, which can improve the pairing accuracy between a road-side power supply device and a vehicle-side power receiving device.

[0008] Means used to solve problems

[0009] In order to solve the above problems and achieve the purpose, the non-contact power supply system during driving of the present invention pairs the vehicle-side power receiving device with the road-side power supply device for a vehicle equipped with the vehicle-side power receiving device, and supplies power from the 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 devices are respectively arranged on multiple lanes of the road, and the road-side power supply device has: a first communication device for performing wide-area wireless communication with the vehicle-side power receiving device, and a second communication device for performing narrowband wireless communication with the vehicle-side power receiving device, and the vehicle-side power receiving device has: a first communication device for performing wide-area wireless communication with the vehicle-side power receiving device, and a second communication device for performing narrowband wireless communication with the vehicle-side power receiving device, and the vehicle-side power receiving device has: a first communication device for performing wide-area wireless communication with the vehicle-side power receiving device, and a second communication device for performing narrowband wireless communication with the vehicle-side power receiving device. The third communication device for performing wide-area wireless communication with the road-side power supply device, and the fourth communication device for performing narrowband wireless communication with the road-side power supply device, each road-side power supply device respectively arranged in the multiple lanes has: a sharing unit that can share the information related to the vehicle obtained by the second communication device from the fourth communication device; and a determination unit that determines the lane in which the vehicle is traveling based on the information related to the vehicle shared by the sharing unit, and pairs the road-side power supply device arranged in the lane determined to be the lane in which the vehicle is traveling among the multiple lanes with the vehicle-side power receiving device.

[0010] Therefore, the non-contact power supply system during driving of the present invention can improve the pairing accuracy between the road-side power supply device and the vehicle-side power receiving device.

[0011] Furthermore, in the above, when the second communication device obtains the information related to the vehicle from the fourth communication device in each of the plurality of lanes, pairing of the road-side power supply devices respectively provided in the plurality of lanes with the vehicle-side power receiving device may not be performed.

[0012] This can prevent unnecessary pairing of the road-side power feeding device and the vehicle-side power receiving device.

[0013] In addition, the above may also be that the road-side power supply device has a plurality of the second communication devices, and when the second communication device obtains information related to the vehicle from the fourth communication device in each of the plurality of lanes, the judgment unit determines that the vehicle is traveling in the lane with the largest number of the second communication devices that have obtained information related to the vehicle among the plurality of lanes.

[0014] This improves the pairing accuracy between the roadside power feeding device and the vehicle-side power receiving device even when information about the vehicle is acquired through narrowband wireless communication in each of a plurality of lanes.

[0015] Furthermore, in the above, information related to the vehicle's lane movement intention may be transmitted from the vehicle-side power receiving device to the road-side power supply device via the narrowband wireless communication, and the road-side power supply device may be re-paired with the vehicle-side power receiving device based on the information related to the lane movement intention.

[0016] This makes it possible to pair the road-side power supply device and the vehicle-side power receiving device based on the information regarding the lane shift intention.

[0017] In addition, the power supply device of the present invention is respectively arranged in multiple lanes of the road on which the vehicle is traveling, and is paired with the vehicle-side power receiving device mounted on the vehicle to supply power to the traveling vehicle in a non-contact manner. The power supply device is characterized in that each power supply device respectively arranged in the multiple lanes has: a first communication device for performing wide-area wireless communication with a third communication device of the vehicle-side power receiving device; a second communication device for performing narrowband wireless communication with a fourth communication device of the vehicle-side power receiving device; a sharing unit, whereby each power supply device can share information related to the vehicle obtained by the second communication device from the fourth communication device; and a determination unit, which determines the lane in which the vehicle is traveling based on the information related to the vehicle shared by the sharing unit, and the power supply device arranged in the lane determined to be the lane in which the vehicle is traveling among the multiple lanes is paired with the vehicle-side power receiving device.

[0018] Therefore, the power supply device of the present invention can improve the accuracy of pairing with the vehicle-side power receiving device.

[0019] In addition, a power receiving device of the present invention is mounted on a vehicle and paired with a roadside power supply device installed on a road on which the vehicle is traveling, and receives power supplied from the roadside power supply device in a contactless manner while the vehicle is traveling. The power receiving device is characterized in that it includes: a third communication device for performing wide-area wireless communication with a first communication device of the roadside power supply device, and a fourth communication device for performing narrowband wireless communication with a second communication device of the roadside power supply device. The power receiving device is paired with the roadside power supply device installed in the lane determined to be the lane where the vehicle is traveling, through a sharing unit and a determination unit included in a plurality of the roadside power supply devices respectively installed in a plurality of lanes of the road. The sharing unit enables each roadside power supply device to share information related to the vehicle obtained by the second communication device from the fourth communication device. The determination unit determines the lane in which the vehicle is traveling based on the information related to the vehicle shared by the sharing unit.

[0020] Therefore, the power receiving device of the present invention can improve the accuracy of pairing with the road-side power feeding device.

[0021] Effects of the Invention

[0022] The non-contact power supply system, power supply device, and power receiving device during driving of the present invention achieve the effect of improving the pairing accuracy between the road-side power supply device and the vehicle-side power receiving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram showing a wireless power transmission system according to an embodiment.

[0024] Figure 2 This is a diagram showing the overall configuration of a wireless power transmission system.

[0025] Figure 3 This is a schematic diagram for explaining wide-area wireless communication in a wireless power transmission system.

[0026] Figure 4 This is a block diagram for explaining the functional configuration of the power transmission ECU.

[0027] Figure 5 This is a block diagram for explaining the functional configuration of a vehicle ECU.

[0028] Figure 6 A diagram for explaining the power transmission process.

[0029] Figure 7 This is a sequence diagram showing a case where communication using wide area wireless communication is performed between the vehicle and the supply device.

[0030] Figure 8 This is a timing chart showing the operation after the supply of electric power from the supply device to the vehicle while it is running is completed.

[0031] Figure 9 This is a diagram showing a situation where a vehicle is traveling in the left lane of a road.

[0032] Figure 10 The figure shows a state where the right direction indicator in the vehicle's traveling direction is turned on.

[0033] Figure 11 This diagram shows a situation in which the supply devices in the left lane and the right lane acquire the vehicle identification information of the same vehicle through narrowband wireless communication during a lane change.

[0034] Figure 12 This figure shows a case where only the supply device in the right lane of the lane change destination acquires the vehicle identification information of the vehicle through narrowband wireless communication.

[0035] Figure 13 This is a flowchart showing an example of control when a vehicle changes lanes in the wireless power transmission system according to the embodiment.

[0036] Figure 14 This is a diagram showing a situation where the communication area of ​​narrowband wireless communication from the fourth communication device installed in the vehicle is wide. DETAILED DESCRIPTION

[0037] Hereinafter, embodiments of the in-running contactless power supply system, power supply device, and power receiving device of the present invention will be described.

[0038] 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 and includes a supply device 2 and a vehicle 3. Supply device 2 is a device that 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).

[0039] This wireless power transmission system 1 wirelessly transmits power from a supply device 2 to a vehicle 3 using 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 utilizes magnetic field resonance to transmit power, and utilizes 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.

[0040] Supply equipment 2 includes a supply device 5 serving as a roadside power supply device and an AC power source 6 that supplies power to supply device 5. Supply device 5 transmits power supplied from AC power source 6 to vehicle 3 in a contactless manner. AC power source 6 is, for example, a commercial power source. Supply device 5 includes a power transmission device 10 having a primary coil 11.

[0041] 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 set 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, the supply device 5 is as follows: Figure 1 As shown, there are three sections 7 arranged along the lanes of a road 4, and a management device 8 connecting the three sections 7. Sections 7 have the function of transmitting power from a supply device 5 to a vehicle 3 in a contactless manner. Management device 8 has the function of controlling wireless power transmission in sections 7.

[0042] 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 bottom of the vehicle body 3. When vehicle 3 travels on road 4, where primary coil 11 is installed, primary coil 11 on the ground and secondary coil 21 on the vehicle side are vertically opposed (opposed, facing each other). While vehicle 3 is traveling on road 4, wireless power transmission system 1 transmits power contactlessly from primary coil 11 of power transmitting device 10 to secondary coil 21 of power receiving device 20.

[0043] In this description, "driving" refers to a state in which the vehicle 3 is located 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 for a traffic light, is also included in "driving." On the other hand, even if the vehicle 3 is located on the road 4, for example, when the vehicle 3 is parked, it is not included in "driving."

[0044] In this description, a lane where a primary coil 11 (segment 7) is embedded is sometimes referred to as a D-WPT lane, and a portion of road 4 where wireless power transmission from a power supply device 5 is possible is sometimes referred to as a D-WPT charging site. In a D-WPT lane or D-WPT charging site, multiple primary coils 11 (segments 7) are arranged along a predetermined section of road 4 in the direction of travel of vehicle 3 (direction indicated by arrow B).

[0045] 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 section 7 is electrically connected to the management device 8.

[0046] 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.

[0047] 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 Collection) circuit 210, an inverter (INV) 220, a filter circuit 230, and a power transmission-side resonance circuit 240.

[0048] 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 .

[0049] Inverter 220 converts the DC power input from PFC circuit 210 into AC power. Each switching element in inverter 220 is composed of IGBTs (Insulated Gate Bipolar Transistors) and MOSFETs (Metal-Oxide-Semiconductor Field Effect Transistors), and switches based on control signals 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.

[0050] 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 a coil and a capacitor. For example, filter circuit 230 is a T-type filter, consisting of 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.

[0051] The power-transmitting-side resonant circuit 240 is a power transmission unit that transmits the AC power supplied from the filter circuit 230 to 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.

[0052] The power-transmitting-side resonant circuit 240 includes a primary coil 11 and a resonant capacitor. The primary coil 11 is a power-transmitting coil. The resonant capacitor is connected in series with one end of the primary coil 11 to adjust the resonant frequency of the power-transmitting-side resonant circuit. This resonant frequency is between 10 kHz and 100 GHz, preferably 85 kHz. For example, the power transmitting device 10 is configured so that the resonant frequency of the power-transmitting-side resonant circuit 240 matches the drive frequency of the inverter 220. The power-transmitting-side resonant circuit 240 constitutes the primary device 13 of the power transmitting device 10.

[0053] The power transmission device 10 includes a power conversion unit 12 and a primary device 13. The power conversion unit 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 is configured such that the power conversion unit 12 is provided in the management device 8, and the primary device 13 is provided in the section 7.

[0054] 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 installed 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 installed in the section 7 .

[0055] The power transmission ECU 110 is an electronic control unit that controls the supply device 5. The power transmission ECU 110 includes: a processor and a 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 and is composed of a RAM (Random Access Memory) and a ROM (Read Only Memory). The power transmission EUC 110 loads the program stored in the storage unit into the working area of ​​the memory (main storage device) and executes it. Through the execution of the program, it controls each component and realizes the function that meets the predetermined purpose. The storage unit is composed of recording media such as an 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. Furthermore, the power transmission ECU 110 executes various controls based on the signals input from the various sensors.

[0056] 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.

[0057] 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 .

[0058] The first communication device 120 is a ground-side communication device that performs wide-area wireless communication. It wirelessly communicates with vehicles 3 traveling on road 4 before (or immediately before) approaching a D-WPT lane. The state before approaching a D-WPT lane means that vehicle 3 is in a position where narrowband wireless communication with supply device 5 is impossible.

[0059] Wide-area wireless communication is communication with a communication distance of 10 meters to 10 kilometers. Wide-area wireless communication is communication with a longer communication distance than narrowband wireless communication. Various wireless communication methods with long communication distances can be used as wide-area wireless communication. For example, communication that complies with communication standards such as 4G, LTE, 5G, and WiMAX established by 3GPP (registered trademark) and IEEE is 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.

[0060] Second communication device 130 is a ground-side communication device that performs narrowband wireless communication. Second communication device 130 wirelessly communicates with vehicles 3 traveling on road 4 that are approaching or entering a D-WPT lane. Approaching a D-WPT lane means that vehicle 3 is in a position where narrowband wireless communication with supply device 5 is possible.

[0061] Narrowband wireless communication is communication with a communication distance of less than 10 meters. Narrowband wireless communication is communication with a communication distance shorter than wide-area wireless communication. As narrowband wireless communication, various short-range wireless communications with short communication distances can be used. For example, communication in accordance with any communication standard established by IEEE, ISO, and IEC is used for narrowband wireless communication. As an example, Wi-Fi (registered trademark), Bluetooth (registered trademark), and ZigBee (registered trademark) are used for narrowband wireless communication. Alternatively, as a technology for performing narrowband wireless communication, RFID (Radio Frequency Identification), DSRC (Dedicated 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 narrowband wireless communication.

[0062] Foreign object detection device 140 detects metallic foreign objects, living organisms, and the like above primary coil 11. It is comprised of, for example, a sensor coil installed on the ground and an imaging device. It is used to perform the foreign object detection (FOD) and living object protection (LOP) functions of wireless power transmission system 1.

[0063] In the supply device 5, the power transmission device 10 is configured separately from the sectors 7 and the management device 8, and three sectors 7 are connected to one management device 8. The power transmission device 10 is configured so that one inverter supplies power to three transmission-side resonant circuits 240. Furthermore, in the supply device 5, signals from each sector 7 are input to the management device 8. Signals from the second communication device 130 and the foreign object detection device 14 installed in the first sector are input to the power transmission ECU 110. Similarly, signals from the second communication device 130 and the foreign object detection device 14 installed in the second sector are input to the power transmission ECU 110. Signals from the second communication device 130 and the foreign object detection device 14 installed in the third sector are input to the power transmission ECU 110. The power transmission ECU 110 can understand the status of each sector 7 based on the signals input from each sector 7.

[0064] The 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 .

[0065] 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 resonance circuit 410, a filter circuit 420, and a rectifier circuit 430.

[0066] The receiving-side resonant circuit 410 is a power receiving unit that receives power transmitted contactlessly 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 contactlessly 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 determined to match the resonant frequency of the transmitting-side resonant circuit 240.

[0067] 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 receiving-side resonant circuit 410 and the transmitting-side resonant circuit 240 face each other and a magnetic field is generated by the transmitting-side resonant circuit 240, the vibrations of the magnetic field are transmitted to the receiving-side resonant circuit 410. The primary coil 11 and the secondary coil 21 enter a resonant state. When an induced current flows in 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 power transmitted contactlessly from the transmitting-side resonant circuit 240 is received by the receiving-side resonant circuit 410. 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.

[0068] 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 that combines a coil and a capacitor. For example, filter circuit 420 is composed of a T-type filter with two coils and a capacitor arranged in a T-shape.

[0069] 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 formed by connecting four diodes as rectifying elements. Each diode in rectifier circuit 430 is connected in parallel with a switching element. Each switching element in rectifier circuit 430 is comprised of an IGBT and switches according 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 the power conversion unit 23 of power receiving device 20.

[0070] Power receiving device 20 includes secondary device 22 and power conversion unit 23. Secondary device 22 includes a power receiving-side resonant circuit 410. Power conversion unit 23 includes a filter circuit 420 and a rectifier circuit 430.

[0071] The charging relay 310 is provided between the rectifier circuit 430 and the battery 320. The opening and closing states of the charging relay 310 are controlled by the vehicle ECU 330. When the power transmission device 10 is charging the battery 320, the charging relay 310 is controlled to be closed. When the charging relay 310 is closed, the rectifier circuit 430 and the battery 320 are connected so that electricity can flow. When the charging relay 310 is open, the rectifier circuit 430 and the battery 320 are disconnected so that electricity cannot flow. For example, when the charging relay 310 is open, the vehicle 3 does not request power supply.

[0072] Battery 320 is a rechargeable DC power source, such as a lithium-ion battery or nickel-metal hydride battery. Battery 320 stores the power supplied from power transmission device 10 to power reception device 20. Battery 320 can also supply power to the vehicle 3's propulsion motor. Battery 320 is electrically connected to the propulsion motor via a PCU (Power Control Unit). The PCU is a power conversion device that converts the DC power from battery 320 into AC power and supplies it to the propulsion motor. Each switching element in the PCU is composed of an IGBT, which switches according to control signals from the vehicle ECU 330.

[0073] 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.

[0074] For example, vehicle ECU 330 performs contactless charging control by transmitting power from primary coil 11 to secondary coil 21 in a non-contact manner, storing the power received by secondary coil 21 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.

[0075] 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, third communication device 340 performs wireless communication with first communication device 120 of supply device 5. Wide-area wireless communication is bidirectional. Communication between first communication device 120 and third communication device 340 is performed via high-speed wireless communication.

[0076] The fourth communication device 350 is a vehicle-side communication device that performs narrowband wireless communication. When the 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. Narrowband wireless communication is one-way wireless signaling. One-way wireless signaling is P2PS (Point to point signaling). P2PS is used to notify the supply device 5 of vehicle identification information from the vehicle 3 in each activity (activity) of pairing, position alignment check, magnetic coupling check, end of power transmission, and end of power transmission. In addition, P2PS can be used as a unit for lateral position alignment check (Alignment check). Lateral refers to the width direction of the lane, and is the width direction of the vehicle 3.

[0077] The GPS receiver 360 detects the current position of the vehicle 3 based on the 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.

[0078] 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 .

[0079] In addition, the filter circuit 230 may be provided separately for the primary coil 11 , or may be provided uniformly in a plurality of primary coils 11 .

[0080] 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 .

[0081] Furthermore, in the power transmission device 10, after the inverter 220 is connected to the 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 the management device 8 near the road 4 or near the primary coil 11.

[0082] Furthermore, the power-transmitting-side resonant circuit 240 is not limited to a configuration in which the primary coil 11 and the resonant capacitor are connected in series. The primary coil 11 and the resonant capacitor may also be connected in parallel, or in a combination of parallel and series connections. In short, as long as 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, the connection relationship of its components is not particularly limited. This also applies to the power-receiving-side resonant circuit 410 of the vehicle 3.

[0083] The driving frequency of the inverter 220 is not limited to 85 kHz, and may be a frequency near 85 kHz. In short, the driving frequency of the inverter 220 may be a predetermined frequency band including 85 kHz.

[0084] 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 .

[0085] Furthermore, the foreign object detection device 140 is not limited to being located on the ground, 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, a living organism, or the like above the primary coil 11, the power supply request may be stopped until the vehicle 3 passes the primary coil 11.

[0086] In wireless power transmission system 1, information transmitted from vehicle 3 to supply device 5 via narrowband 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.

[0087] Furthermore, the wireless power transmission system 1 is not limited to the method of supplying power from the ground to the vehicle 3, but can also realize the method of 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 when supplying and receiving power.

[0088] Figure 3 1 is a schematic diagram for explaining wide area wireless communication of the wireless power transmission system 1 .

[0089] In the wireless power transmission system 1, the vehicle 3 can communicate with the server 30, and the supply device 5 can communicate with the server 30. The server 30 is connected to a network 40 and can communicate with multiple vehicles 3 and multiple supply devices 5 via the network 40. The network 40 is composed of a WAN (Wide Area Network) such as a public communication network such as the Internet, a telephone communication network for mobile phones, and the like.

[0090] The vehicle 3 is connected to the network 40 via 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.

[0091] The supply device 5 is connected to the network 40 via 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.

[0092] 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 , an information sharing unit 540 , and a determination unit 550 .

[0093] First communication control unit 510 executes first communication control for controlling first communication device 120. The first communication control controls wide-area wireless communication on the supply device 5 side and controls communication with supply device 5 using first communication device 120. Specifically, the first communication control controls communication with management device 8 in supply device 5. The first communication control controls communication between supply device 5 and network 40, and also controls communication between supply device 5 and server 30 via network 40. First communication control unit 510 is a SECC (Supply Equipment Communication Controller).

[0094] Second communication control unit 520 executes second communication control for controlling second communication device 130. Second communication control controls narrowband wireless communication on the supply device 5 side and controls communication within supply device 5 using second communication device 130. Specifically, second communication control controls communication within section 7 of supply device 5. Second communication control controls communication between supply device 5 and vehicle 3, not via network 40. Second communication control unit 520 is a Primary Device Communication Controller (PDCC).

[0095] The power transmission control unit 530 performs power transmission control for the power transmission device 10. The power transmission control controls the power for transmission and controls the power conversion unit 12 of the power transmission device 10. The power transmission control unit 530 performs power control for the PFC circuit 210 and the inverter 220.

[0096] The information sharing unit 540 is a supply unit that can share mutually acquired information on the vehicle 3 between the supply devices 5 installed in each of a plurality of lanes. The information on the vehicle 3 includes, for example, vehicle identification information.

[0097] The determination unit 550 is a determination means for determining the lane in which the vehicle 3 is traveling based on the information on the vehicle 3 shared by the information sharing unit 540 .

[0098] 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 .

[0099] The third communication control unit 610 executes the third communication control for controlling the third communication device 340. The third communication control controls wide-area wireless communication on the vehicle 3 side and controls communication within the vehicle 3 using the third communication device 340. The third communication control controls communication between the vehicle 3 and the network 40 and between the vehicle 3 and the server 30 via the network 40. The third communication control unit 610 is an EVCC (EV Communication Controller).

[0100] Fourth communication control unit 620 executes fourth communication control for controlling fourth communication device 350. The fourth communication control controls narrowband wireless communication on the vehicle 3 side and controls communication within vehicle 3 using fourth communication device 350. The fourth communication control controls communication between vehicle 3 and supply device 5, not via network 40. Fourth communication control unit 620 is a Secondary Device Communication Controller (SDCC).

[0101] 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 the rectifier circuit 430. The charging control unit 630 also performs relay control for switching the charging relay 310 between open and closed states.

[0102] 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.

[0103] Next, refer to Figure 6 , the power transmission process (D-WPT process) is explained. The power transmission process is constructed as a chain of multiple activities and is a process derived from states and corresponding transitions.

[0104] Figure 6 This is a diagram used to explain the power transmission process. Figure 6 The basic activities used to illustrate the power transmission process are shown. Figure 6 The thick arrows shown represent transition lines. The state of the wireless power transmission system 1 during power transmission is represented by the activities constituting the power transmission process.

[0105] The activities that constitute the power transmission process include the power transmission service session (D-WPT service session A70), which is a phased activity for power transmission, as well as phased activities before and after power transmission. Furthermore, activities can be described separately based on whether or not communication is occurring between the supply device 5 and the vehicle 3. Activities are categorized as follows: activities that indicate a state with no communication between the supply device 5 and the vehicle 3, activities that indicate a state with no communication between the vehicle 3 and the supply device 5, and activities that indicate a state with communication between both the supply device 5 and the vehicle 3.

[0106] like Figure 6 As shown, the activities include: Master power On state A10, Preparation A20, Waiting for D-WPT service request from vehicle 3 A30, Master power On state A40, Preparation A50, Communication setup and D-WPT service request A60, D-WPT service session A70, and Terminate D-WPT service session A80.

[0107] Preparation A20 is the standby state of the supply device 5. In preparation A20, the supply device 5 starts the circuit and confirms safety without communicating with the vehicle 3. The supply device 5 transitions to (moves to) the preparation A20 state when the main power supply is turned on in state A10. Then, in preparation A20, when the supply device 5 starts the circuit and confirms safety, the state transitions to waiting for a request from the vehicle 3 A30. On the other hand, if there is a problem 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 cannot be used (unusable notification). The first communication device 120 transmits the unusable notification to the vehicle 3.

[0108] Preparation A50 is the standby state of vehicle 3. In Preparation A50, vehicle 3 starts the circuit and verifies safety without communicating with supply device 5. Vehicle 3 transitions to Preparation A50 when the main power supply is turned on in State A40. Then, in Preparation A50, if vehicle 3 has started the circuit and verified safety, 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.

[0109] The communication setup and the request A60 for the D-WPT service are started by the vehicle ECU 330. In the communication setup and the request A60 for the D-WPT service, the vehicle ECU 330 starts wide area wireless communication. First, when the vehicle 3 moves from preparation A50 to the communication setup and the request A60 for the D-WPT service, the third communication device 340 sends a request signal for the D-WPT service. The third communication device 340 wirelessly communicates with the first communication device 120 corresponding to the D-WPT lane that the vehicle 3 is scheduled to enter or has entered. The first communication device 120 of the communication object is selected based on the relative positional relationship between the current position of the vehicle 3 and the position of the D-WPT lane. On the supply device 5 side, when the first communication device 120 receives the request signal for the D-WPT service in the state of the request waiting A30 from the vehicle 3, the state moves to the communication setup and the request A60 for the D-WPT service. Various information of the wide area wireless communication and the P2PS communication are linked using the vehicle identification information. The processing sequence of the communication setup and the request A60 for the D-WPT service is as follows: Figure 7 Shown in.

[0110] Figure 7 This is a sequence diagram showing a situation where communication using wide area wireless communication is implemented between vehicle 3 and supply device 5. Vehicle 3 transmits vehicle information to server 30 (step S11). In step S11, the third communication device 340 of vehicle 3 transmits the vehicle information to server 30. The vehicle information includes vehicle identification information, various parameters of the power receiving device 20, the current location information of vehicle 3, and the requested power. The vehicle ECU 330 calculates the requested power based on the SOC of 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 location of vehicle 3 to the starting point of the D-WPT lane. The shorter the distance from vehicle 3 to the starting point of the D-WPT lane, the shorter the interval of the predetermined time.

[0111] 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.

[0112] 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 .

[0113] 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 properly registered in the identification information list.

[0114] When registering or deleting 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 .

[0115] Then, 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.

[0116] Vehicle 3 then starts wide area wireless communication, and when both supply device 5 and vehicle 3 are in the communication setup and D-WPT service request A60 state, communication setup via wide area wireless communication succeeds.

[0117] Back to Figure 6With 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 when communication setup is successful and ends when communication ends. When communication ends while the D-WPT service session A70 is in progress, the state transitions to D-WPT service session end A80.

[0118] 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 a trigger indicating the termination of the D-WPT service session A70. Furthermore, vehicle ECU 330 prevents D-WPT from starting with secondary device 22 and vehicle 3 until third communication device 340 receives the next notification (D-WPT service request signal).

[0119] Here, detailed operations of the D-WPT service session A70 will be described.

[0120] The D-WPT service session A70 includes: compatibility check and service authentication A110, fine positioning of the vehicle in the lateral direction A120, pairing and alignment check A130, magnetic coupling check A140, power transfer execution A150, standby A160, and power transfer termination A170.

[0121] 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. This compatibility check is performed based on information associated with the vehicle identification information acquired by the supply device 5 through communication. Inspection items include the minimum ground height 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.

[0122] In the compatibility check and service authentication A110, vehicle 3 first transmits compatibility information (Compatibility 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 of power receiving device 20 from vehicle 3. Furthermore, supply device 5's first communication device 120 transmits compatibility information of power transmitting device 10 to vehicle 3. Vehicle 3's third communication device 340 receives the compatibility information of power transmitting device 10 from supply device 5.

[0123] The elements of the compatibility information sent by vehicle 3 to the supply device 5 include: vehicle identification information, WPT power classes (WPT Power Classes), gap levels (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, fine positioning method), pairing method (Pairing Method), positioning alignment method (Alignment Method, alignment method), and information on whether there is a power adjustment function.

[0124] 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 position alignment method, pairing method, position alignment method, and information on whether there is a power adjustment function, etc.

[0125] Each element name is described in detail. In addition, each element of the compatibility information sent from the vehicle 3 to the supply device 5 is described, and the description of the parts of the compatibility information sent from the supply device 5 to the vehicle 3 that overlap with the compatibility information sent from the vehicle 3 to the supply device 5 is omitted.

[0126] The gap class is information indicating the gap class at which the secondary device 22 can receive power. The WPT power class is information indicating the power class 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 and the coil shape of the secondary coil 21. Examples of WPT types include circular and solenoid. The WPT circuit topology is information indicating the connection structure between the secondary coil 21 and the resonant capacitor. Examples of WPT circuit topologies include series and parallel connections. The detailed alignment method is information indicating how alignment is performed during alignment. The pairing method is the method by which the vehicle 3 determines the pairing of the supply device 5. The alignment method indicates the method for confirming the relative positions of the secondary device 22 and the primary device 13 before power transmission begins.

[0127] The detailed vehicle lateral position alignment A120 will be described. Vehicle 3 performs detailed vehicle lateral position alignment A120 before or in parallel with pairing and position alignment check A130. Vehicle ECU 330 initiates detailed vehicle lateral position alignment A120 when it determines that vehicle 3 is approaching or entering the area (WPT lane) where supply device 5 is located.

[0128] The vehicle ECU 330 guides the vehicle 3 so that the primary device 13 and the secondary device 22 are positioned within a range where a magnetic coupling sufficient for wireless power transmission is established.

[0129] The detailed vehicle lateral position alignment A120 is basically performed manually or automatically on the vehicle 3 side. The detailed vehicle lateral position alignment A120 can cooperate with an ADAS (Advanced Driver Assistance System). The end of this communication is the end A80 of the D-WPT service session.

[0130] Furthermore, the detailed vehicle lateral positioning A120 activity can continue until the vehicle 3 leaves the D-WPT charging station or the communication state changes to end, and can be executed based on the positioning information transmitted from the supply device 5 to the vehicle 3 via wide area wireless communication.

[0131] The pairing and alignment check A130 will be described. Here, the pairing and alignment check will be described separately.

[0132] The P2PS interface for narrowband wireless communication ensures that the primary device 13 and the secondary device 22 are uniquely paired. The process of the pairing state is as follows.

[0133] 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, using the straight-line distance, etc. to identify the approach or entry. Vehicle 3 transmits which D-WPT lane it has approached to the server 30 via wide-area wireless communication. In short, the third communication device 340 notifies the cloud of a signal indicating that vehicle 3 has approached any D-WPT lane. Furthermore, when the vehicle ECU 330 identifies that vehicle 3 is approaching or entering a D-WPT lane, the fourth communication device 350 begins transmitting modulated signals at regular intervals to pair the primary device 13 with the secondary device 22.

[0134] Alternatively, the supply device 5 can use information obtained from the server 30 via wide-area wireless communication to identify when a vehicle 3 approaches or enters a vehicle 3 D-WPT lane. The server 30 distributes the vehicle identification information of each vehicle 3 approaching a D-WPT lane to the supply device 5 corresponding to that lane. The supply device 5 only needs to refer to the vehicle identification information narrowed down by the server 30, enabling authentication to be performed in a shorter time. When the supply device 5 identifies that a vehicle 3 is approaching a D-WPT lane, the second communication device 130 enters a 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 the vehicle identification information.

[0135] When second communication device 130 receives a modulated signal from vehicle 3, supply device 5 compares the vehicle identification information received via narrowband wireless communication with the vehicle identification information in the identification information list obtained through wide-area wireless communication with multiple vehicles 3 approaching the D-WPT lane. This comparison allows supply device 5 to identify vehicle 3.

[0136] When the vehicle ECU 330 recognizes that the vehicle 3 is outside the D-WPT lane, it stops transmitting 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 the map information and the vehicle's position information.

[0137] When the supply device 5 determines that the vehicle 3 is not traveling on the D-WPT lane or that the vehicle 3 is not approaching the D-WPT lane, the supply device 5 stops waiting for the modulated signal from the fourth communication device 350 .

[0138] Pairing is performed on the primary device 13 until the vehicle 3 exits the D-WPT charging station or the status changes to Communication Ended. When pairing is completed, the status changes to Position Alignment Check.

[0139] The alignment check is described below. The purpose of the alignment check is to confirm that the lateral distance between the primary device 13 and the secondary device 22 is within the allowable range. The alignment check is performed using narrowband wireless communication (P2PS).

[0140] The P2PS-based positioning check continues until the vehicle 3 leaves the D-WPT charging station or the communication state is reached. The positioning check result can be transmitted from the first communication device 120 to the third communication device 340 via wide area wireless communication.

[0141] The magnetic coupling check A140 will be described. In the magnetic coupling check A140, the supply device 5 checks the magnetic coupling state and confirms that 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.

[0142] The execution of power transmission (power transfer) A150 will be described. In this state, the supply device 5 transmits power to the power receiving device 20. The power transmitting device 10 and the power receiving device 20 must be capable of controlling the transmitted power (both transmitted and received) to ensure the effectiveness of MF-D-WPT and protect the power receiving device 20 and the battery 320. Greater power transmission eliminates the need for static wireless charging and conductive charging of the power receiving device 20, thus helping to extend its range. 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 is prioritized, so in addition to regenerative power, power received from the power receiving device 20 is also supplied to the battery 320. In this case, the power receiving device 20 must adjust the transmitted power to prevent overcharging of the battery 320.

[0143] Although power control is necessary, new communication between the power supply device 5 and the power receiving device 20 does not begin in this state. This is because communication instability and latency could compromise the responsiveness and accuracy of power control. Therefore, the power supply device 5 and the power receiving device 20 conduct power transmission and control based on known information from prior to this state.

[0144] 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 maintains the fluctuation of current and voltage within the range and attempts to maximize the power transmitted during the transition.

[0145] 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 charge state and / or the power requirements for driving the vehicle 3, exceeds or is about to exceed the limit, the power receiving device 20 initiates control. Furthermore, the vehicle ECU 330's power control is also required to address malfunctions in wide-area wireless communications. Such malfunctions can lead to conflicts between the power control targets of the primary device 13 and requests from the third communication device 340, as well as sudden failures of the power receiving device 20 or 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.

[0146] The power request is determined based on the WPT circuit topology, geometry, ground clearance, and EMC (electromagnetic compatibility) compatibility check information of the vehicle 3 and primary device 13. The magnetic field varies depending on these specifications, and power must be transmitted within the EMC range.

[0147] 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 of 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, the supply device 5 should preferably be able to detect any mismatch between the power control target and the limit and adjust power transmission to eliminate the mismatch.

[0148] For example, if foreign object detection device 14 detects a foreign object on primary device 13, or if magnetic coupling decreases due to misalignment of secondary device 22, and power transmission is briefly interrupted while secondary device 22 is still above primary device 13, the state shifts to standby A160. Furthermore, if vehicle 3 is equipped with a foreign object detection device, foreign objects can also be detected on the vehicle 3 side.

[0149] When the secondary device 22 passes over the primary device 13, the state transitions to the end of power transmission A170. In this state, the magnetic coupling between the two devices weakens, reducing the amount of power transmitted. 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 end of power transmission A170 and then begins reducing the voltage to stop power transmission.

[0150] Preparation A160 will be described. In this state, if power transmission is temporarily interrupted for some reason, the state returns to execution A150 of power transmission after both the vehicle 3 and the supply device 5 are ready for D-WPT. If power transmission is likely to be interrupted, the state returns to preparation A160.

[0151] The end of power transmission A170 is described. In this state, the supply device 5 reduces the transmitted power to zero, and maintains or uploads the power transmission result data such as the total transmitted power, power transmission efficiency, and fault history. Vehicle identification information is assigned to each data. Finally, the supply device 5 deletes the vehicle identification information of the vehicle 3 that passed through the D-WPT lane. In this way, the supply device 5 can prepare for subsequent pairing and power transmission to other vehicles. The processing sequence of the end of power transmission A170 is Figure 8 Shown in.

[0152] Figure 8 This is a sequence diagram showing the operations after the power supply device 5 has completed power supply to the vehicle 3 while the vehicle is traveling. When power receiving device 20 of vehicle 3 completes power reception (receiving power) from the power supply device 5 (step S21), vehicle 3 transmits power reception completion information to server 30 (step S22). In step S22, the power reception completion information is transmitted from third communication device 340 of vehicle 3. The power reception completion information, which is information related to power reception from the power supply device 5, includes, for example, vehicle identification information of vehicle 3, power received from the power supply device 5, power reception efficiency, and abnormality detection results.

[0153] When the supply device 5 performs step S21, it terminates power transmission to the vehicle 3 (step S23). Steps S21 and S23 may be performed simultaneously or separately. When step S23 is performed, the supply device 5 transmits power transmission termination information to the server 30 (step S24). In step S24, the power transmission termination information is transmitted from the first communication device 120 of the supply device 5.

[0154] 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 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.

[0155] Moreover, 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.

[0156] When 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 ).

[0157] Then, when the power supply termination process for a certain vehicle 3 has been completed in a certain supply device 5, the server 30 deletes the vehicle identification information of the vehicle 3 that has completed the power supply termination process based on the vehicle identification information of the vehicle 3 in the vicinity of the supply device 5 determined in the process of step S27 (step S28).

[0158] Thereafter, the server 30 transmits, to each supply device 5 , vehicle information associated with the vehicle identification information not deleted in the process of step S28 , among the vehicle identification information of the vehicles 3 identified as being located in the vicinity of each supply device 5 (step S29 ).

[0159] 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 is the same as that of step S14. After that, 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 that of step S14. Figure 7 The processing of step S15 is the same.

[0160] Then, 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 is the same.

[0161] 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 deleted 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 any supply device 2. Therefore, by receiving the list registration notification, the vehicle ECU 330 can determine that the vehicle is registered in any supply device 5. Then, if vehicle 3 moves out of the vicinity of a supply device 5, the vehicle identification information of that vehicle 3 is deleted from the identification information list of the supply device 5.

[0162] return Figure 6In addition, at the end of power transmission A170, nothing needs to be done in the power receiving device 20 to make the transmitted power zero. The P2PS interface remains active (valid) 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 perform the next power transmission from the primary device 13. Figure 6 As shown by the transition line shown, the state moves from the end of power transfer A170 to the pairing and position alignment check A130. Figure 6 As shown, when predetermined transition conditions are met, it is possible to transition from magnetic coupling check A140 to pairing and alignment check A130, and it is possible to transition from power transmission execution A150 to pairing and alignment check A130. Pairing can be performed on multiple primary coils 11 individually or by gathering multiple primary coils 11 at a representative point.

[0163] 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 transfer 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 continuous power transfer. 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 established wide-area wireless communication, freeing up memory occupied by the vehicle 3 without the need for D-WPT.

[0164] In addition, the D-WPT service session A70 is not limited to Figure 6 The transition is as shown in the transition line. In D-WPT service session A70, when activities after pairing and alignment check A130 are completed, the power transmission process remains at D-WPT service session A70, and if the conditions for D-WPT service session A70 are met, the process does not transition to D-WPT service session end A80, but instead transitions to compatibility check and service authentication A110. For example, if the predetermined transition conditions are met while in magnetic coupling check A140, the process can transition to compatibility check and service authentication A110.

[0165] Figure 9 4 is a diagram showing a situation where the vehicle 3 is traveling in the left lane 41 of the road 4. Figure 9 In FIG, arrow B shows the direction of travel of vehicle 3. In addition, Figure 9In FIG. 8 , reference numeral 830 indicates a communication area of ​​narrowband wireless communication performed by the fourth communication device 350 installed in the vehicle 3. Figure 9 In the figure, reference numerals 370R and 370L denote direction indicators (winkers, turn signal lamps) provided on the vehicle 3 .

[0166] like Figure 9 As shown, a supply device 5 is installed in each of the left lane 41 and the right lane 42 as a plurality of adjacent lanes on the road 4, and the left lane 41 and the right lane 42 form a D-WPT lane. Figure 4 As shown, there is an information sharing unit 540 that can share information related to the vehicle 3 obtained by each other through wide area wireless communication via the network 40. The information related to the vehicle 3 provided by the information sharing unit 540 includes at least the vehicle identification information of the vehicle 3. In addition, each supply device 5 of the left lane 41 and the right lane 42 is as shown. Figure 4 The diagram shows a determination unit 550 that determines the lane in which the vehicle 3 is traveling based on the information about the vehicle 3 shared by the information sharing unit 540 .

[0167] Furthermore, when the vehicle identification information of the vehicle 3 is obtained by the narrowband wireless communication through only the supply device 5 installed in either the left lane 41 or the right lane 42 on the road 4, the vehicle identification information of the vehicle 3 is authenticated and the primary device 13 of the supply device 5 is paired with the secondary device 22 of the vehicle 3. Figure 9 In the example, the supply device 5 in the left lane 41, where vehicle 3 is traveling, obtains the vehicle identification information of vehicle 3 via narrowband wireless communication. Then, the information sharing unit 540 of each supply device 5 in the left lane 41 and right lane 42 shares the vehicle identification information of vehicle 3 obtained by the supply device 5 in the left lane 41 with the supply device 5 in the right lane 42 via wide-area wireless communication via the network 40. Consequently, the determination unit 550 of each supply device 5 in the left lane 41 and right lane 42 determines that vehicle 3 is traveling in the left lane 41 based on the vehicle identification information of vehicle 3 obtained by the supply device 5 in the left lane 41, which is shared by the information sharing unit 540. The supply device 5 in the left lane 41, having determined that vehicle 3 is traveling, then authenticates the vehicle identification information of vehicle 3, pairs the primary device 13 of the supply device 5 in the left lane 41 with the secondary device 22 of vehicle 3, and initiates power transmission.

[0168] Figure 10 3 is a diagram showing a state in which the direction indicator 370R on the right side in the traveling direction of the vehicle 3 is turned on.

[0169] like Figure 10As shown, when vehicle 3 changes lanes from left lane 41 to right lane 42, it turns on (flashes) direction indicator 370R to the right of vehicle 3's direction of travel (direction indicated by arrow B). Consequently, information regarding the operation (on) of direction indicator 370R is transmitted from vehicle 3 via narrowband wireless communication along with vehicle identification information of vehicle 3 and received by supply device 5 in left lane 41. Consequently, information sharing unit 540, included in each supply device 5 in left lane 41 and right lane 42, shares the information regarding the operation (on) of direction indicator 370R, etc., received by supply device 5 in left lane 41, with supply device 5 in right lane 42 via wide-area wireless communication via network 40. Consequently, supply device 5 in left lane 41, where vehicle 3 is traveling, suspends vehicle identification information authentication and power transmission. Furthermore, supply device 5 in right lane 42, located at the lane change destination (in the direction indicated by direction indicator 370R), prepares to authenticate vehicle identification information of vehicle 3.

[0170] Figure 11 This diagram shows a situation in which the vehicle identification information of the same vehicle 3 is acquired by each supply device 5 in the left lane 41 and the right lane 42 through narrowband wireless communication during a lane change.

[0171] like Figure 11 As shown, during a lane change, vehicle 3 is located between left lane 41 and right lane 42. Through narrowband wireless communication from the fourth communication device 350 installed in vehicle 3, the supply devices 5 in left lane 41 and right lane 42 may obtain the same vehicle identification information of vehicle 3. In this case, the information sharing unit 540 of each supply device 5 in left lane 41 and right lane 42 shares the mutually obtained vehicle identification information of vehicle 3. Consequently, the determination unit 550 of each supply device 5 in left lane 41 and right lane 42 determines that vehicle 3 is traveling between left lane 41 and right lane 42 based on the same vehicle identification information of vehicle 3 shared by the information sharing unit 540. Furthermore, based on the determination result of the determination unit 550, each supply device 5 in left lane 41 and right lane 42 does not authenticate the vehicle identification information of vehicle 3.

[0172] Figure 12 This diagram shows a situation where the supply device 5 passing only through the right lane 42 at the lane change destination acquires the vehicle identification information of the vehicle 3 through narrowband wireless communication.

[0173] like Figure 12As shown, only the supply device 5 in the right lane 42, the lane change destination, acquires the vehicle identification information of the vehicle 3 via narrowband wireless communication. Furthermore, the information sharing unit 540 included in each of the supply devices 5 in the left lane 41 and the right lane 42 shares the vehicle identification information of the vehicle 3 acquired by the supply device 5 in the right lane 42 with the supply device 5 in the left lane 41 via wide-area wireless communication via the network 40. Consequently, the determination unit 550 included in each of the supply devices 5 in the left lane 41 and the right lane 42 determines that the vehicle 3 is traveling in the right lane 42 based on the vehicle identification information of the vehicle 3 acquired by the supply device 5 in the right lane 42, shared by the information sharing unit 540. The supply device 5 in the right lane 42, having determined that the vehicle 3 is traveling, then authenticates the acquired vehicle identification information of the vehicle 3, pairs the primary device 13 of the supply device 5 in the right lane 42 with the secondary device 22 of the vehicle 3, and initiates power transmission.

[0174] As described above, in the wireless power transmission system 1 of the embodiment, the information sharing unit 540 of the supply devices 5 located in multiple lanes allows each supply device 5 to share information related to the vehicle 3 acquired by the other. Furthermore, the determination unit 550 of each supply device 5 determines the lane in which the vehicle 3 is traveling based on the information related to the vehicle 3 shared by the information sharing unit 540 of each supply device 5. Thus, in the wireless power transmission system 1 of the embodiment, when a lane change is being performed, for example, the supply device 5 in the lane in which the vehicle 3 is traveling is selected as the target for authentication of the vehicle identification information of the vehicle 3. This improves the pairing accuracy between the primary device 13 of the supply device 5 and the secondary device 22 of the vehicle 3.

[0175] Furthermore, during a lane change, if the same vehicle identification information of vehicle 3 is obtained by the supply devices 5 in left lane 41 and right lane 42, the supply device 5 in right lane 42, the lane change destination, can initiate the authentication of vehicle 3's vehicle identification information. Furthermore, in this case, the authentication of vehicle 3's vehicle identification information by the supply device 5 in left lane 41, which is not the lane change destination, is not performed. This improves the pairing accuracy between the primary device 13 of the supply device 5 in right lane 42, the lane change destination, and the secondary device 22 of vehicle 3, allowing for faster completion of pairing and the initiation of power transmission.

[0176] Furthermore, the determination of the lane change maneuver of vehicle 3 and the lane of the lane change destination by the determination unit 550 is not limited to information related to the operation (on) of the direction indicators 370L, 370R provided on vehicle 3. For example, the determination unit 550 may determine the lane change maneuver of vehicle 3 and the lane of the lane change destination based on the steering angle of the steering wheel provided on vehicle 3. In other words, the information related to vehicle 3 transmitted from vehicle 3 to the supply device 5 via narrowband wireless communication may include information related to the steering angle of the steering wheel, along with the vehicle identification information of vehicle 3. Furthermore, the determination unit 550 may determine the lane change maneuver of vehicle 3 and the lane of the lane change destination based on information related to the operation (on) of the direction indicators 370L, 370R provided on vehicle 3 and information related to the steering angle of the steering wheel provided on vehicle 3.

[0177] Figure 13 This is a flowchart showing an example of control when the vehicle 3 changes lanes in the wireless power transmission system 1 according to the embodiment. Figures 9 to 12 As shown, supply devices 5 are provided in the left lane 41 and the right lane 42 of the road 4 , respectively, and a series of controls are started from the time when the vehicle 3 travels in the left lane 41 .

[0178] First, the supply device 5 in the left lane 41 obtains the vehicle identification information of the vehicle 3 via narrowband wireless communication (step S41). Next, the information sharing unit 540 in each of the supply devices 5 in the left lane 41 and the right lane 42 shares the vehicle identification information of the vehicle 3 obtained by the supply device 5 in the left lane 41 with the supply device 5 in the left lane 41 via wide-area wireless communication via the network 40 (step S42). Next, the determination unit 550 in each of the supply devices 5 in the left lane 41 and the right lane 42 determines that the vehicle 3 is traveling in the left lane 41 based on the vehicle identification information of the vehicle 3 shared by the information sharing unit 540 (step S43). The supply device 5 in the left lane 41, having determined that the vehicle 3 is traveling, then authenticates the vehicle identification information of the vehicle 3 and pairs the primary device 13 of the supply device 5 in the left lane 41 with the secondary device 22 of the vehicle 3 (step S44). The supply device 5 in the left lane 41 then begins power transmission to the vehicle 3 (step S45). Next, the supply device 5 in the left lane 41 determines whether the direction indicator 370R of the vehicle 3 is on based on the information about the vehicle 3 obtained via narrowband wireless communication (step S46). If the supply device 5 in the left lane 41 determines that the direction indicator 370R of the vehicle 3 is on ("Yes" in step S46), the process proceeds to step S48. On the other hand, if the supply device 5 in the left lane 41 determines that the direction indicator 370R is off ("No" in step S46), the supply device 5 in the left lane 41 determines whether the steering angle of the steering wheel (handle) of the vehicle 3 is greater than or equal to a predetermined value θ (steering angle ≧ predetermined value θ) based on the information about the vehicle 3 obtained via narrowband wireless communication (step S47). If the supply device 5 in the left lane 41 determines that the steering angle is greater than or equal to the predetermined value θ ("Yes" in step S47), the process proceeds to step S48. On the other hand, when the supply device 5 of the left lane 41 determines that the steering angle is lower than the predetermined value θ (No in step S47 ), the process returns to step S46 .

[0179] Next, in step S48, the information sharing unit 540 of each supply device 5 in the left lane 41 and the right lane 42 shares information related to vehicle 3's lane change with each supply device 5 in the left lane 41 and the right lane 42 via wide-area wireless communication via the network 40 (step S48). The information related to vehicle 3's lane change (information related to vehicle 3's lane movement intention) includes information related to the operation of the turn signal indicator 370R (turn signal indicator 370R is on) or information related to the steering angle (steering angle ≥ predetermined value θ). Next, the supply device 5 in the left lane 41 suspends the authentication of vehicle 3's vehicle identification information and power transmission based on the shared information related to vehicle 3's lane change (step S49). Next, the supply device 5 in the right lane 42 prepares to authenticate vehicle 3's vehicle identification information based on the shared information related to vehicle 3's lane change (step S50). Next, the supply device 5 in the right lane 42 obtains vehicle 3's vehicle identification information via narrowband wireless communication (step S51). Next, the information sharing unit 540 of each supply device 5 in the left lane 41 and right lane 42 shares the vehicle identification information of the vehicle 3 obtained by the supply device 5 in the right lane 42 with the supply device 5 in the left lane 41 via wide-area wireless communication via the network 40 (step S52). Next, the determination unit 550 of each supply device 5 in the left lane 41 and right lane 42 determines that the vehicle 3 is traveling in the right lane 42 based on the vehicle identification information of the vehicle 3 shared by the information sharing unit 540 (step S53). Next, the supply device 5 in the right lane 42, having determined that the vehicle 3 is traveling, authenticates the vehicle identification information of the vehicle 3 and pairs the primary device 13 of the supply device 5 in the right lane 42 with the secondary device 22 of the vehicle 3 (step S54). Next, the supply device 5 in the right lane 42 begins power transmission to the vehicle 3 (step S55). The series of controls for each supply device 5 in the left lane 41 and right lane 42 ends.

[0180] Figure 14 This is a diagram showing a situation where a communication area 380 of narrowband wireless communication from a fourth communication device 350 installed in a vehicle 3 is wide.

[0181] like Figure 14As shown, for example, there is a case where the communication area 380 of the narrowband wireless communication from the fourth communication device 350 installed in the vehicle 3 is wide, and even if the vehicle 3 is traveling in the left lane 41, the vehicle identification information of the vehicle 3 is obtained through the respective supply devices 5 in the left lane 41 and the right lane 42. In this case, in each supply device 5 in the left lane 41 and the right lane 42, the number of segments 7 of the second communication device 130 that has obtained the vehicle identification information of the vehicle 3 through narrowband wireless communication is calculated. Moreover, the information sharing unit 540 possessed by each supply device 5 in the left lane 41 and the right lane 42 shares the number of segments 7 possessed by the second communication device 130 that has obtained the vehicle identification information, which is calculated by each supply device 5 in the left lane 41 and the right lane 42 respectively via the network 40 through wide area wireless communication. The determination unit 550 possessed by each supply device 5 in the left lane 41 and the right lane 42 determines that the lane having the larger number of the shared segments 7 is the lane in which the vehicle 3 is traveling. In Figure 14 In the example, the number of segments 7 in the supply device 5 in the left lane 41 that have the second communication device 130 that has acquired the vehicle identification information of the vehicle 3 is six, and the number of segments 7 in the supply device 5 in the right lane 42 that have the second communication device 130 that has acquired the vehicle identification information of the vehicle 3 is one. Therefore, the determination unit 550 in each of the supply devices 5 in the left lane 41 and the right lane 42 determines that the vehicle 3 is traveling in the left lane 41. Furthermore, the supply device 5 in the left lane 41, having determined that the vehicle 3 is traveling, authenticates the vehicle identification information of the vehicle 3, pairs the primary device 13 of the supply device 5 in the left lane 41 with the secondary device 22 of the vehicle 3, and initiates power transmission.

[0182] Furthermore, for example, when vehicle 3 changes lanes from left lane 41 to right lane 42, data from the power transmission can be temporarily stored in supply device 5 in left lane 41. Consequently, after changing lanes from left lane 41 to right lane 42, when vehicle 3 returns from right lane 42 to left lane 41, the previously stored data can be used to simplify the authentication of vehicle identification information of vehicle 3 by supply device 5 in left lane 41.

[0183] Furthermore, in the wireless power transmission system 1 of the embodiment, the information related to the vehicle 3 acquired by the supply devices 5 in the adjacent left lane 41 and right lane 42 on the road 4 is not limited to being shared with each other via wide-area wireless communication via the network 40. For example, information related to the vehicle 3 may be shared with the supply devices 5 located in a lane of a road different from the road 4 via wide-area wireless communication via the network 40. In this way, if the same vehicle identification information of the vehicle 3 is acquired by the supply devices 5 at the same time on a road different from the road 4, it is possible to detect improper use of the vehicle identification information by either party.

[0184] Industrial applicability

[0185] The present invention can provide a non-contact power supply system, a power supply device, and a power receiving device during driving, which can improve the pairing accuracy between the road-side power supply device and the vehicle-side power receiving device.

[0186] Description of labels

[0187] 1 Wireless Power Transmission System

[0188] 2 Supply equipment

[0189] 3 vehicles

[0190] 4 Road

[0191] 5 Supply device

[0192] 6 AC power supply

[0193] 7 sections

[0194] 10 Power transmission device

[0195] 11 Primary coil

[0196] 13 Primary Device

[0197] 20 Power receiving device

[0198] 21 Secondary coil

[0199] 22 Secondary Devices

[0200] 40 Network

[0201] 41 Left Lane

[0202] 42 Right Lane

[0203] 370L, 370R direction indicators

[0204] 380 communication area

[0205] 540 Information Sharing Department

[0206] 550 Judgment Department.

Claims

1. A non-contact power supply system for a moving vehicle equipped with a vehicle-side power receiving device, wherein the vehicle-side power receiving device is paired with a road-side power supply device, and power is supplied non-contactly from the road-side power supply device, wherein the non-contact power supply system for a moving vehicle is characterized by: The road-side power supply devices are respectively arranged on multiple lanes of the road. The road-side power supply device includes a first communication device for performing wide-area wireless communication with the vehicle-side power receiving device, and a second communication device for performing narrowband wireless communication with the vehicle-side power receiving device. The vehicle-side power receiving device includes a third communication device for performing wide-area wireless communication with the road-side power feeding device, and a fourth communication device for performing narrowband wireless communication with the road-side power feeding device. Each road-side power supply device provided on each of the plurality of lanes includes: a sharing unit capable of sharing the information related to the vehicle acquired by the second communication device from the fourth communication device; and a determination unit that determines the lane in which the vehicle is traveling based on the information related to the vehicle shared by the sharing unit, The road-side power feeding device, which is provided in the lane determined to be the lane where the vehicle is traveling among the plurality of lanes, is paired with the vehicle-side power receiving device.

2. The non-contact power supply system during driving according to claim 1, When the second communication device acquires information related to the vehicle from the fourth communication device in each of the plurality of lanes, The road-side power supply devices installed in the plurality of lanes are not paired with the vehicle-side power receiving devices.

3. The non-contact power supply system during driving according to claim 1, The road-side power supply device includes a plurality of the second communication devices. When the second communication device acquires information related to the vehicle from the fourth communication device in each of the plurality of lanes, The determination unit determines that the vehicle is traveling in a lane having the largest number of second communication devices that have acquired information related to the vehicle among the plurality of lanes.

4. The non-contact power supply system during driving according to claim 1, Information on the vehicle's lane change intention is transmitted from the vehicle-side power receiving device to the road-side power supply device via the narrowband wireless communication. The road-side power supply device is re-paired with the vehicle-side power receiving device based on the lane change intention information.

5. A power supply device, installed in each of a plurality of lanes of a road on which a vehicle is traveling, and paired with a vehicle-side power receiving device mounted on the vehicle to supply power to the traveling vehicle in a contactless manner, wherein: Each power supply device provided in the plurality of lanes has: a first communication device for performing wide area wireless communication with a third communication device of the vehicle-side power receiving device; a second communication device for performing narrowband wireless communication with a fourth communication device of the vehicle-side power receiving device; a sharing unit, wherein each power supply device can share the information related to the vehicle obtained by the second communication device from the fourth communication device; as well as a determination unit that determines the lane in which the vehicle is traveling based on the information related to the vehicle shared by the sharing unit, The power supply device installed in the lane determined to be the lane where the vehicle is traveling among the plurality of lanes is paired with the vehicle-side power receiving device.

6. A power receiving device mounted on a vehicle and paired with a roadside power supply device provided on a road on which the vehicle is traveling, and receiving power supplied from the roadside power supply device in a contactless manner while the vehicle is traveling, wherein: comprising: 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-band wireless communication with the second communication device of the road-side power supply device, The shared unit and the determination unit of the plurality of road-side power supply devices respectively provided in the plurality of lanes of the road are paired with the road-side power supply device provided in the lane determined to be the lane where the vehicle is traveling, The sharing unit enables each road-side power supply device to share the information related to the vehicle obtained by the second communication device from the fourth communication device. The determination unit determines the lane in which the vehicle is traveling based on the information about the vehicle shared by the sharing unit.

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