JP2012161145A - Wireless power transmission system, power reception device, power transmission device, and wireless power transmission supporting method - Google Patents

Abstract

Communication is performed between a power transmission device that wirelessly supplies power and a power receiving device mounted on a power-driven moving body, and power is supplied to the moving body wirelessly.
A power transmission device that transmits power wirelessly and a power receiving device that is mounted on a mobile body that is driven by the power stored in the storage battery and that can receive power transmitted wirelessly from the power transmission device and can be stored in the storage battery. A wireless power transmission system including a device, a condition determination unit that determines whether or not a predetermined condition for preparing to start wireless power transmission is satisfied, and power transmission when the predetermined condition is satisfied Based on the acquisition unit that establishes communication between the device and the power receiving device and acquires information about the power transmitting device and information about the power receiving device, and between the power transmitting device and the power receiving device based on the information about the power transmitting device and the information about the power receiving device And a power supply determination unit that determines whether or not power supply is possible.
[Selection] Figure 3

Description

  The present invention relates to a technique for supplying power to a battery mounted on a moving body.

  In the field of land transportation, research and development of automobiles that run on electric power has been actively conducted due to concerns about air pollution and depletion of fossil fuels. As a technique for supplying electric power to such an electric vehicle, conventionally, an electrode installed in a station and an electrode installed in the front or rear of the vehicle are brought into contact with each other, and through the contact of the electrode, that is, a charging cable. There is a technique for performing charging using (see Patent Document 1).

JP 2000-50508 A

  However, a method in which the vehicle is charged by a wired connection to the power supply source, and a method in which the vehicle and the power supply source are charged without being connected by a charging cable, that is, wireless charging is not considered. . For example, when charging an electric vehicle wirelessly at the time of parking, it may be necessary to perform control content adjustment processing, power transmission start or end processing, etc. due to individual differences in electric vehicles or individual differences in power transmission equipment, etc. However, the appropriate method has not been established. Individual differences among electric vehicles include, for example, the corresponding charging method, the type of charging device, the amount of electricity stored, the mounting position of the power receiving device, the parts used for the power receiving device, etc. Whether there is a contract with a company). In addition, the individual difference between the power transmission facilities is, for example, the corresponding charging method, the type of the power transmission device, the installation position of the power transmission device, and the like, and further the power transmission facility type (for example, power transmission facility holding company data).

  In view of the above-described problems, the present invention performs communication between a power transmission device that wirelessly supplies power and a power reception device mounted on a power-driven moving body, and power feeding for wirelessly feeding the moving body The problem is to provide a system.

  In order to solve the above problems, the present invention includes the following means in a wireless power transmission system. That is, one of the aspects of the present invention is mounted on a power transmission device that wirelessly transmits power and a mobile body that is driven by the power stored in the storage battery, and receives power transmitted wirelessly from the power transmission device. A power reception system capable of storing electricity in a storage battery, a condition determination unit for determining whether or not a predetermined condition capable of preparing for start of wireless power transmission is satisfied, and the predetermined condition is If satisfied, establish communication between the power transmitting device and the power receiving device, acquire the information regarding the power transmitting device and the information regarding the power receiving device, and transmit power based on the information regarding the power transmitting device and the information regarding the power receiving device. And a power supply determination unit that determines whether power can be supplied between the device and the power receiving device.

  When a predetermined condition that can prepare for the start of wireless power transmission is satisfied, information about the power transmission device and information about the power reception device can be acquired, and power can be supplied between the power transmission device and the power reception device based on these information By determining whether or not, it is possible to appropriately transmit power to the power-driven moving body on which the power receiving device is mounted by wireless power transmission.

  Further, in the present invention, the information regarding the power transmission device is the specification information of the power transmission device, the information regarding the power reception device is the specification information of the power reception device, and the power supply determination unit is configured to supply the power transmission device specification and the power reception device specification. It is determined whether or not power can be supplied between the power transmitting device and the power receiving device by determining whether or not they are suitable. Information about hardware is, for example, a standard of a wireless power transmission method, a standard of parts used, or the like.

  One embodiment of the present invention is a power transmission device that wirelessly transmits power, and a mobile body that is mounted on a mobile body that is driven by the power stored in the storage battery, and that receives the power transmitted wirelessly from the power transmission device and stores the storage battery. A condition determination unit that determines whether or not a predetermined condition for preparing to start wireless power transmission is satisfied, and the predetermined condition is satisfied The communication unit establishes communication between the power transmission device and the power reception device, acquires the information about the power transmission device and the information about the power reception device, and the power transmission device based on the information about the power transmission device and the information about the power reception device. The wireless power transmission system includes an operation setting unit that sets an operation condition of the power receiving device.

  In addition, one aspect of the present invention is a power receiving device that is mounted on a mobile body that is driven by power stored in a storage battery and that can receive power transmitted wirelessly from the power transmission device and store the power in the storage battery. A condition determination unit that determines whether or not a predetermined condition capable of preparing to start wireless power transmission is satisfied, and a transmission request is transmitted to the power transmission apparatus when the predetermined condition is satisfied A power receiving unit including: an acquisition unit that establishes communication and acquires information about the power transmission device; and a power reception determination unit that determines whether or not power can be received from the power transmission device based on the information about the power transmission device and the information about the power reception device Device.

  In addition, one aspect of the present invention is a power receiving device that is mounted on a mobile body that is driven by power stored in a storage battery and that can receive power transmitted wirelessly from the power transmission device and store the power in the storage battery. Receiving a communication request from the power transmission device when a predetermined condition capable of preparing to start wireless power transmission is satisfied, and establishing an communication with the power transmission device and acquiring information about the power transmission device; And a power reception determination unit that determines whether or not power can be received from the power transmission device based on information regarding the power transmission device and information regarding the power reception device.

  One of the aspects of the present invention is a power receiving device that is mounted on a mobile body that is driven by the power stored in the storage battery, and that can receive the power transmitted wirelessly from the power transmission device and store the power in the storage battery. A condition determination unit that determines whether or not a predetermined condition that can prepare for start of wireless power transmission is satisfied, and communication with the power transmission apparatus by transmitting a communication request to the power transmission apparatus when the predetermined condition is satisfied And an operation setting unit that sets operating conditions of the power transmission device and the power reception device based on the information about the power transmission device and the information about the power reception device. is there.

  One of the aspects of the present invention is a power receiving device that is mounted on a mobile body that is driven by the power stored in the storage battery, and that can receive the power transmitted wirelessly from the power transmission device and store the power in the storage battery. An acquisition unit that establishes communication with the power transmission device and receives information about the power transmission device by receiving a communication request from the power transmission device when a predetermined condition capable of preparing to start wireless power transmission is satisfied; The power receiving device includes a power transmission device and an operation setting unit that sets an operation condition of the power receiving device based on information on the device and information on the power receiving device.

One of the aspects of the present invention is that a power receiving device that is mounted on a mobile body driven by power stored in a storage battery and receives power transmitted wirelessly and can be stored in the storage battery wirelessly. A communication device that receives a communication request from the power receiving device when a predetermined condition that can prepare for starting wireless power transmission is satisfied, and establishes communication with the power receiving device, and relates to the power receiving device The power transmission device includes an acquisition unit that acquires information, and a power supply determination unit that determines whether or not power can be supplied to the power receiving device based on the information about the power transmission device and the information about the power reception device.

  One of the aspects of the present invention is that a power receiving device that is mounted on a mobile body driven by power stored in a storage battery and receives power transmitted wirelessly and can be stored in the storage battery wirelessly. A condition determination unit that determines whether or not a predetermined condition that can prepare for start of wireless power transmission is satisfied, and a communication request to the power receiving apparatus when the predetermined condition is satisfied By transmitting, the communication unit establishes communication with the power receiving device, and determines whether power can be supplied to the power receiving device based on an acquisition unit that acquires information about the power receiving device, information about the power transmitting device, and information about the power receiving device. A power transmission determining unit.

  One of the aspects of the present invention is that a power receiving device that is mounted on a mobile body driven by power stored in a storage battery and receives power transmitted wirelessly and can be stored in the storage battery wirelessly. A communication device that receives a communication request from the power receiving device when a predetermined condition that can prepare for starting wireless power transmission is satisfied, and establishes communication with the power receiving device, and relates to the power receiving device The power transmission device includes an acquisition unit that acquires information, and an operation setting unit that sets operating conditions of the power transmission device and the power reception device based on information about the power transmission device and information about the power reception device.

  One of the aspects of the present invention is that a power receiving device that is mounted on a mobile body driven by power stored in a storage battery and receives power transmitted wirelessly and can be stored in the storage battery wirelessly. A condition determination unit that determines whether or not a predetermined condition that can prepare for start of wireless power transmission is satisfied, and a communication request to the power receiving apparatus when the predetermined condition is satisfied By establishing the communication with the power receiving device by transmitting, the operating unit of the power transmitting device and the power receiving device is set based on the acquisition unit that acquires information about the power receiving device, the information about the power transmitting device, and the information about the power receiving device. And an operation setting unit.

  Furthermore, the present invention can be grasped as a method or a program executed by a computer. Further, the present invention may be a program in which such a program is recorded on a recording medium readable by a computer, other devices, machines, or the like. Here, a computer-readable recording medium is a recording medium that stores information such as data and programs by electrical, magnetic, optical, mechanical, or chemical action and can be read from a computer or the like. Say.

  For example, one aspect of the present invention is mounted on a power transmission device that wirelessly transmits power and a mobile body that is driven by the power stored in the storage battery, and receives power transmitted wirelessly from the power transmission device. A wireless power transmission support method executed in a wireless power transmission system including a power receiving device capable of storing electricity in a storage battery, and determining whether or not a predetermined condition for preparing to start wireless power transmission is satisfied Establishing a communication between the power transmission device and the power receiving device when a predetermined condition is satisfied, obtaining information regarding the power transmission device and information regarding the power reception device, information regarding the power transmission device and information regarding the power reception device And determining whether power can be supplied between the power transmitting device and the power receiving device based on the wireless power transmission support method.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the suitable electric power feeding system for electrically feeding electric power driven mobile body wirelessly.

It is a figure which shows the structural example of the electric power feeding system in 1st Embodiment. It is a figure which shows the example of the outline of a structure of a vehicle equipment. It is a figure which shows the example of a structure of a wireless power transmission system. It is a figure which shows the example of a function structure of a receiving controller. It is a figure which shows the example of a function structure of a power transmission controller. It is an example of the flowchart of a communication establishment process. It is an example of the flowchart of an electric power feeding start preparation process. It is an example of the flowchart of the communication establishment process and power supply start preparation process in 2nd Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings. The configuration of the following embodiment is an exemplification, and the present invention is not limited to the configuration of the embodiment.

<First Embodiment>
The first embodiment is an example of a power feeding system that feeds power to a vehicle-mounted battery by wireless power transmission using magnetic field resonance. Hereinafter, a power transmission device that wirelessly transmits power and power reception that can receive the wirelessly transmitted power A communication establishment process and a power supply start preparation process before starting the power supply with the apparatus will be described in detail. The communication establishment process and the power supply start preparation process in the first embodiment are various wireless power transmission methods other than the magnetic field resonance method in the first embodiment, for example, a method using electromagnetic induction between coils, a microwave transmission method, etc. The present invention can also be applied to a power feeding system employing various transmission methods.

(Configuration of the entire power supply system)
FIG. 1 is a diagram illustrating a configuration example of a power feeding system according to the first embodiment. The power feeding system includes a power receiving side system 100 that is mounted on a vehicle and performs power receiving related operations, a power feeding side system 300 that is installed in a parking lot and performs power feeding related operations, a power receiving side system 100 of each vehicle, and a power feeding side that is installed in various places. A VICS (VICS) that has a system 300 and a center system 200 that exchanges and processes various types of information as a basic configuration, and that provides various types of vehicle-related information useful for vehicles such as traffic information to the power receiving side system 100. A real-time road information distribution system 400 such as a Vehicle Information and Communication System) is provided as an expansion configuration for function expansion. Then, the power receiving system 100, the center system 200, the power feeding side system 300, and the real-time road information distribution system 400 are connected to each other via a network to constitute a power feeding system.

As the network, for example, a network in which the Internet, a mobile phone network, a dedicated line, a private network, an intranet, and the like are connected to each other can be used. As a specific network, a network suitable for the information center server 2 of the center system 200, the power supply facility management server 3 of the power supply side system 300, the vehicle-mounted device 1 of the power reception side system 100, and the like to communicate with each other is adopted. It is preferable. For example, in 1st Embodiment, the vehicle equipment 1 transmits / receives information between the information center server 2 or the electric power feeding equipment management server 3 using a mobile telephone network via a user's mobile telephone 5. FIG. However, for information transmission and reception, satellite communications and mobile WiMAX (Worldwide Interoperability for Microwave
Other communication methods such as “Access” are also applicable.

The vehicle-mounted device 1 can be implemented as a so-called car navigation system. At this time, a part of the car navigation system that performs processing, which provides an interface for the user (an operation unit such as operation switches, a display panel, etc.) Other than a display unit, a sound output unit such as a speaker, etc.) and a part for acquiring information related to the vehicle, it is not necessarily installed in the vehicle. Necessary input is transmitted to the navigation device main body or server device installed outside, and necessary navigation-related processing (for example, route search processing, map image generation processing, etc.) is performed in the main body or server device, and the processing result is sent to the vehicle-mounted device 1. A method may be employed in which the information is transmitted and displayed.

  The center system 200 has various information about each power supply system such as parking lot information, charging information for power supply by the power supply facility, etc., and an information center server 2 that performs information storage and information processing in a data center that performs various information processing. Have The center system 200 receives information provided from the power receiving side system 100 (vehicle equipment 1) and the power feeding side system 300 (power feeding facility management server 3) via the network, stores the information, accepts an information request, and receives the information request. Necessary information is provided to the system 100 (the vehicle-mounted device 1) and the power supply side system 300 (the power supply facility management server 3). Here, the parking lot information includes parking lot availability information, reservation information, and service information (power supply equipment information: presence / absence of power supply equipment, specifications, availability information, etc.). A system that provides road information from the center system 200 to the power receiving system 100 (the vehicle-mounted device 1) can also be realized. In this case, the road information can be realized by accumulating information distributed from the real-time road information distribution system 400 such as VICS. The road information includes traffic jam information, construction information, sightseeing spot information, and the like.

  The power supply side system 300 includes a power supply facility management server 3 as a system control device. The power supply facility management server 3 is, for example, a server that manages each power supply facility provided in each parking area of a parking lot, and provides information for controlling the operation of each power supply facility to each power supply facility. Information such as the operation status is obtained and stored from the power supply equipment, and the information is processed. In addition, the power supply facility management server 3 exchanges various information with the in-vehicle device 1 and the power transmission device 110 via the network, stores and processes these information, and performs operations of the in-vehicle device 1 and the power transmission device 110 and each power supply facility. Provide necessary information. Information handled by the power supply facility management server 3 includes the power supply method, standard, power supply capability (rapid chargeability, etc.) of the power supply facility, facility availability information, reservation information (information regarding charging conditions such as reservation time and charge amount, etc. Information on reserved vehicles such as standard information of power receiving facilities in reserved vehicles).

(Configuration of in-vehicle device)
FIG. 2 is a diagram illustrating a schematic example of the configuration of the in-vehicle device 1. The in-vehicle device 1 includes an input / output device 8 including a central processing unit (CPU) 13, a random access memory (RAM) 10, a read only memory (ROM) 11, a hard disk drive (HDD) 12, a touch panel display, a push button switch, and the like. , An information processing apparatus in which a CD / DVD deck 14, a TV / AM / FM tuner 15, a communication interface 9 and the like are electrically connected. In-vehicle device 1 is connected to power amplifier 16, speaker 17, GPS receiver 18, vehicle speed sensor 19, and charge / discharge control device 131 for in-vehicle battery 133.

  The CPU 13 is a central processing unit, and controls the RAM 10, HDD 12, input / output device 8, and the like by processing instructions and data expanded in the RAM 10 and the like. The RAM 10 is a main storage device and is controlled by the CPU 13 to write and read various commands and data. The HDD 12 is an auxiliary storage device, and information to be retained is mainly written and read even when the power of the vehicle-mounted device 1 is turned off. The input / output device 8 includes a touch panel display, various push button switches, and the like. The input / output device 8 is controlled by the CPU 13 to display the output display data and accept an operation by the user. The contents input from the input / output device 8 are recorded in the RAM 10 and processed by the CPU 13.

  In the in-vehicle device 1, an input / output device including a touch panel display and a push button switch is used as the input / output device 8, and mainly provides information through the user's vision, through a touch operation or a button switch pressing operation by the user. Accepts user input. As the user interface, for example, in addition to input / output via a touch panel display or the like, input / output by voice, input by image recognition using a camera, or the like may be used.

  The HDD 12 stores various data used by the in-vehicle device 1 in addition to various programs loaded into the RAM 10. Specifically, the HDD 12 stores a point information database necessary for vehicle navigation, and stores map data and the like. The vehicle-mounted device 1 performs vehicle navigation based on signals from the GPS receiver 18 and the vehicle speed sensor 19, point information, map data, and the like stored in the HDD 12.

  The point information database is a database in which the point information is stored so as to be searchable. In the point information, in addition to the name, address, position information, attribute information (facility type, etc.) of each point, information related to the power supply equipment ( Power supply facility information).

  The communication interface 9 is an interface for the in-vehicle device 1 to communicate with the power receiving unit 120. The communication interface 9 is realized by a LAN (Local Area Network) interface board, for example, and is connected to the in-vehicle device 1 by a communication (LAN) cable. Note that a wireless communication method can be applied to the communication interface 9, and for example, a wireless LAN, Bluetooth (registered trademark), or the like can be applied. Further, the communication interface 9 may be configured to connect a serial or parallel communication cable using a connector without using a LAN, using a serial or parallel communication interface.

(Configuration of wireless power transmission device)
FIG. 3 is a diagram illustrating an example of the configuration of the wireless power transmission system. In the first embodiment, wireless power transmission is used as a power feeding method for the in-vehicle battery 133. The wireless power transmission system roughly includes a power transmission unit 110 (corresponding to “power transmission device”) and a power reception unit 120 (corresponding to “power reception device”). The power transmission unit 110 is provided, for example, on the ground side where the vehicle stops, such as a parking space, and is connected to the power supply facility management server 3. The power receiving unit 120 is mounted on a device side that needs to be charged, for example, a vehicle. In FIG. 3, the signal flow of the control system is indicated by a dotted line. In FIG. 3, the signal flow of the power supply system is indicated by a solid line.

  The power transmission unit 110 includes a power transmission controller 117, a converter 113, a power transmission amplifier 114, a power transmission coil 115, a resonance control unit 116, an oscillation circuit 118, a communication interface 119, an antenna 111, and a data transmission / reception unit 112. The power transmission coil 115 is preferably provided at a position where the vehicle can be easily aligned when the vehicle is stopped, such as a predetermined position based on the parking stop of the parking space. That is, the power transmission coil 115 is a power reception unit 120 provided on the bottom surface of the vehicle when the vehicle tire is stopped in a state where the vehicle tire is in contact with the vehicle stop (the power reception coil 125 is installed at a predetermined position with respect to the vehicle tire). It is preferable to be provided so as to face the power receiving coil 125 included in the above.

The data transmission / reception unit 112 (shown as “transmission / reception unit” in FIG. 3) is a communication interface for wireless communication connected to the antenna 111. The data transmission / reception unit 112 communicates with the data transmission / reception unit 122 of the power reception unit 120 via the antenna 111. Data received by the data transmission / reception unit 112 is output to the power transmission controller 117. As a communication method between the data transmission / reception unit 112 of the power transmission unit 110 and the data transmission / reception unit 122 of the power reception unit 120, for example, short-range wireless communication such as DARC (Dedicated Short Range Communication), infrared communication, Bluetooth (registered trademark), or the like is used. Is preferred. The data transmission / reception unit 112 includes a decoder, an encoder, a modulation circuit, a demodulation circuit, a tuning circuit, an amplification circuit, and the like corresponding to the communication method.

Converter 113 converts AC or DC power supplied from an external power source into DC power having a predetermined voltage and supplies the power to power transmission amplifier 114. The output voltage of converter 113 is controlled by power transmission controller 117.

  The oscillation circuit 118 outputs a signal having an oscillation frequency specified by the instruction signal from the power transmission controller 117 to the power transmission amplifier 114. Further, the oscillation circuit 118 changes the oscillation frequency in accordance with the instruction signal from the power transmission controller 117 and outputs it to the power transmission amplifier 114.

  The power transmission amplifier 114 modulates the direct current power supplied from the converter 113 with a signal of the oscillation frequency given from the oscillation circuit 118 to make an alternating current power, and outputs it to the power transmission coil 115. That is, the power transmission coil 115 is supplied with AC power whose voltage and frequency are appropriately controlled. Further, the AC power supplied to the power transmission coil 115 is controlled by the oscillation frequency output from the oscillation circuit 118 so that the frequency matches the resonance frequency. The power transmission amplifier 114 monitors the amount of power output to the power transmission coil 115 and outputs the transmission power monitor result to the power transmission controller 117.

  The resonance control unit 116 receives the resonance frequency of the power transmission unit 110 in accordance with an instruction signal from the power transmission controller 117 by, for example, controlling the capacity of a resonance frequency variable capacitor (capacitor) connected to the power transmission coil 115. Control is performed so as to match the resonance frequency of the unit 120. That is, the power transmission controller 117 controls the resonance frequency of the power transmission unit 110 to coincide with the resonance frequency of the power reception unit 120, and controls the power transmission electromagnetic wave to output the power transmission electromagnetic wave at this resonance frequency, so Enable transmission.

  The communication interface 119 is configured by, for example, a LAN or a WAN (Wide Area Network) interface board according to the distance from the power supply facility management server 3 and the like, and communicates with the power supply facility management server 3. The power transmission unit 110 communicates with the power supply facility management server 3 through the communication interface 119, and acquires various information, control command signals, and the like. Data input to the communication interface 119 is output to the power transmission controller 117. The power transmission controller 117 is, for example, a microcomputer equipped with a microprocessor. The power transmission controller 117 obtains the data received from the power receiving unit 120 from the data transmission / reception unit 112 and the transmission power monitor result from the power transmission amplifier 114. The power transmission controller 117 sets the oscillation frequency to be instructed to the oscillation circuit 118 and the resonance to be instructed to the resonance control unit 116 based on the preset power transmission settings, the data transmission / reception result with the power receiving unit 120, and the transmission power monitor result. The capacitance of the frequency variable capacitor and the output voltage to be instructed to the converter 113 are determined, and an instruction signal is output to each of them. In addition, the power transmission controller 117 controls communication establishment processing and power supply start preparation processing with the power receiving unit 120 via the data transmission / reception unit 112.

  The power reception unit 120 includes a power reception controller 127, a power reception coil 125, a resonance control unit 126, a rectifier circuit 128, a DC / DC converter 129, a communication interface 130, an antenna 121, and a data transmission / reception unit 122. Here, the power receiving coil 125 is preferably provided at a predetermined position on the vehicle bottom surface with respect to the vehicle tire so as to face the power transmission unit 110 installed on the ground. The power receiving unit 120 is connected to the in-vehicle battery 133 and the motor 132 via the in-vehicle charge / discharge control device 131. The charge / discharge control device 131 discharges the vehicle driving power from the in-vehicle battery 133 in response to the accelerator operation, and when the deceleration operation is performed, the regenerative power generated by the motor 132 is in-vehicle. Control is performed so that the battery 133 is charged.

The data transmission / reception unit 122 is a communication interface connected to the antenna 121 for wireless communication. The data transmission / reception unit 122 communicates with the data transmission / reception unit 112 of the power transmission unit 110 via the antenna 121. Data transmission / reception unit 1
22 preferably communicates with the data transmission / reception unit 112 of the power transmission unit 110 via the antenna 121 using, for example, DARC, infrared communication, Bluetooth (registered trademark), or the like. The data transmission / reception unit 122 includes a decoder, an encoder, a modulation circuit, a demodulation circuit, a tuning circuit, an amplification circuit, and the like corresponding to the communication method. Data received by the data transmission / reception unit 122 is output to the power receiving controller 127.

  In the power receiving coil 125, magnetic field resonance occurs due to the electromagnetic wave output from the power transmitting coil 115, and current is generated. The rectifier circuit 128 (AC / DC converter) converts AC power generated in the power receiving coil 125 into DC power and outputs the DC power to the DC / DC converter 129. The rectifier circuit 128 monitors the amount of power generated in the power receiving coil 125 and outputs the received power monitor result to the power receiving controller 127.

  The DC / DC converter 129 stabilizes the voltage of the DC power output from the rectifier circuit 128 at a predetermined value. The voltage of the DC power is controlled by the power reception controller 127. DC power of a predetermined voltage output from the DC / DC converter 129 is stored in the battery 133 via the charge / discharge control device 131.

  The resonance control unit 126 transmits the resonance frequency of the power reception unit 120 in accordance with an instruction signal from the power reception controller 127 by, for example, controlling the capacitance of a capacitor for changing the resonance frequency connected to the power reception coil 125 (capacitor). Control is performed so as to match the resonance frequency of the unit 110.

  The communication interface 130 is configured by, for example, a LAN interface card, and communicates with the in-vehicle device 1 and the charge / discharge control device 131. In addition to the wired communication interface by LAN, for example, an interface of a serial or parallel wired communication system or a wireless communication system such as a wireless LAN can be applied. The power receiving unit 120 communicates with the in-vehicle device 1 through the communication interface 130 and acquires various information, control command signals, and the like from the in-vehicle device 1. In addition, the power receiving unit 120 acquires the remaining battery level of the in-vehicle battery 133 from the charge / discharge control device 131 through the communication interface 130. Data received by the communication interface 130 is output to the power receiving controller 127.

  The power receiving controller 127 is, for example, a microcomputer equipped with a microprocessor. The power reception controller 127 acquires the data transmission / reception result from the data transmission / reception unit 122 and the reception power monitor result from the rectifier circuit 128. The power reception controller 127 controls the resonance control unit 126 and the DC / DC converter 129 based on preset settings for power reception, a data transmission / reception result with the power transmission unit 110, and a received power monitor result. Specifically, the power reception controller 127 outputs an instruction signal that instructs the resonance control unit 126 to specify the capacitance of the capacitor for changing the resonance frequency. The power receiving controller 127 controls the DC / DC converter 129 to control the DC power voltage for stabilizing the DC power output from the rectifier circuit 128 at a predetermined value. In addition, the power reception controller 127 controls communication establishment processing and power supply start preparation processing with the power transmission unit 110 via the data transmission / reception unit 122.

  FIG. 4 is a diagram illustrating an example of a functional configuration of the power reception controller 127 of the power reception unit 120. FIG. 4 shows the connection of the control signal system, and the connection of the power system (charging power transmission line) is omitted. The power supply control unit includes, for example, a DC / DC converter 129 and the like. The power reception controller 127 executes a communication establishment program stored in a memory (not shown) provided in the power reception unit 120, thereby obtaining a remaining battery level acquisition unit 21, a determination unit 22, a power reception side information generation unit 23, and It operates as the power reception control unit 24.

  The battery remaining amount acquisition unit 21 acquires the battery remaining amount of the in-vehicle battery 133 mounted on the vehicle from the charge / discharge control device 131 through the communication interface 130 periodically (for example, every second), for example. The battery remaining amount acquisition unit 21 notifies the power reception control unit 24 of the acquired battery remaining amount.

  The power reception control unit 24 controls communication establishment processing and power supply start preparation processing. The communication establishment process is a process for establishing communication with the power transmission unit 110. The power supply start preparation process is a process for setting a power reception state from the power transmission unit 110.

  When receiving the notification of the remaining battery level from the remaining battery level acquisition unit 21, the power reception control unit 24 determines whether or not the remaining battery level is equal to or higher than a predetermined threshold, and determines whether or not the in-vehicle battery 133 needs to be charged. When the remaining battery level is less than the predetermined threshold, the power reception control unit 24 activates the determination unit 22 and starts a communication establishment process. If the remaining battery level is equal to or greater than the predetermined threshold, the power reception control unit 24 determines that the in-vehicle battery 133 does not need to be charged and does not activate the determination unit 22. The predetermined threshold is set to a value of about 80% to 90% with respect to the full charge amount of the in-vehicle battery 133, for example.

  The determination unit 22 is activated when the remaining battery level is less than a predetermined threshold according to an instruction from the power reception control unit 24. The determination unit 22 determines whether a condition for outputting a communication request is satisfied. The condition for outputting a communication request is hereinafter referred to as a communication request output condition. The communication request output conditions include, for example, the following.

(1) The approach determination unit 22 of the vehicle on which the power receiving unit 120 is mounted to the power supply facility including the power transmission unit 110 is periodically periodically transmitted from the in-vehicle device 1 through the communication interface 130 (the vehicle on which the power receiving unit 120 is mounted). Get the position. For example, the determination unit 22 obtains vehicle position information from the in-vehicle device 1 every second. The in-vehicle device 1 can acquire vehicle position information from the GPS receiver 18 by using a GPS satellite. Moreover, the vehicle equipment 1 has map information in HDD12, for example, has the positional information of the electric power feeding side system 300 which comprises the power transmission unit 110, such as a parking lot. The determination unit 22 acquires in advance the position information of the power supply side system 300 including the power transmission unit 110 from the in-vehicle device 1, and the vehicle is determined from the position information of the vehicle and the position information of the power supply side system 300 including the power transmission unit 110. It is determined whether or not the power supply side system 300 is approached.

(2) Operation of switch for instructing start of charging by user The determination unit 22 detects that a switch for instructing to start charging of the in-vehicle battery 133 is turned on by the user, and the communication request output condition is satisfied. Is detected. The switch for instructing the start of charging is installed, for example, in the vicinity of the touch panel mounted on the vehicle-mounted device 1, the front surface of the vehicle-mounted device 1, or the front of the driver seat inside the vehicle.

(3) Predetermined operation by the user with respect to the remote controller of the parking facility (shutter, etc.) The determination unit 22 detects the predetermined operation by the user with respect to the remote controller of the parking facility, thereby satisfying the communication request output condition. Detect that. For example, a remote control device of a parking facility is a remote control device that opens and closes a shutter at a user's home, and the predetermined operation is an action of pressing a shutter opening instruction button provided in the remote control device. In this case, charging is started when the shutter at home is opened in order to store the vehicle in the garage when the user returns home. For example, the in-vehicle device 1 includes a receiving unit (not shown) that receives a signal output from the remote controller, and the determination unit 22 of the power receiving unit 120 is output from the remote controller through the in-vehicle device 1. By receiving the shutter opening instruction operation signal, it is detected that the communication request output condition is satisfied. Note that an operation signal for instructing to close the shutter may be detected. In this case, charging is started after the entry of the vehicle into the garage is completed.

(4) Retreat of vehicle The determination unit 22 detects that the communication request output condition is satisfied by detecting the retreat of the vehicle including the power receiving unit 120. When the user sets the shift lever provided in the vehicle to a position for instructing reverse, the vehicle is in a reverse state. When the in-vehicle device 1 can acquire the shift lever signal and detects that the shift lever is set to the position instructing the reverse, it notifies the power receiving unit 120.

(5) Predetermined state that suggests a stop state The determination unit 22 detects that the communication request output condition is satisfied by detecting that the vehicle including the power receiving unit 120 is in the predetermined state. . The predetermined state is, for example, a state in which a hazard lamp is lit, the speed is reduced, and a stop is suggested. The low speed is, for example, 25 km / h. The speed of the vehicle and the lighting of the light provided in the vehicle are detected by, for example, the in-vehicle device 1 and notified to the power receiving unit 120.

As the communication request output condition, any one of (1) to (5) may be actually used, or a plurality of communication request output conditions may be used. The communication request output condition is not limited to the above (1)-(5).
In the case of (3), (4), and (5) above, since there is a high possibility that the vehicle is parked, there is a high possibility that there is power transmission equipment in the vicinity of the vehicle. For this reason, in this case, power supply may be started immediately.

  The determination unit 22 notifies the power reception control unit 24 when detecting that the communication request output condition is satisfied.

  When receiving the notification that the communication request output condition is satisfied, the power reception control unit 24 transmits a power reception side information generation instruction to the power reception side information generation unit 23.

  When receiving the power receiving side information generation instruction from the power receiving control unit 24, the power receiving side information generating unit 23 generates power receiving side information from preset settings for power receiving. The power receiving side information includes, for example, an identifier of the power receiving unit 120. The power receiving side information generating unit 23 transmits the power receiving side information to the power receiving control unit 24. In addition to the identifier of the power receiving unit 120, the power receiving side information includes information about the power receiving unit 120 such as the wireless transmission method standard of the power receiving unit 120 and the specification information of the power receiving unit such as hardware information of each unit. May be.

  When receiving the power receiving side information from the power receiving side information generating unit 23, the power receiving control unit 24 includes the power receiving side information in the communication request and outputs it to the power transmitting unit 110 through the data transmission / reception unit 122. The communication request is output from the data transmission / reception unit 122 as a communication request signal. The power reception control unit 24 outputs a communication request at a predetermined time interval.

  At this time, if there is a power transmission unit 110 near the power receiving unit 120, the communication request signal is received by the power transmission unit 110, and a communication request response to the communication request is output from the power transmission unit 110. When receiving the communication request response, the power reception control unit 24 stops outputting the communication request.

  If there is no power supply facility such as the power transmission unit 110 facing the power reception unit 120, the power reception unit 120 cannot obtain any response to the communication request, and after a predetermined time has elapsed from the output of the communication request, the power reception control unit 24 Stops outputting communication requests.

  When the power reception control unit 24 receives a communication request response from the power transmission unit 110 in response to the communication request through the data transmission / reception unit 122, the communication establishment process ends. The power reception control unit 24 recognizes the presence of the power transmission unit 110 and establishment of communication with the power transmission unit 110 by receiving a communication request response from the power transmission unit 110. The power reception control unit 24 executes power supply start preparation processing when the communication request response indicates power supply permission. In the power supply start preparation process, information regarding power supply is exchanged between the power receiving unit 120 and the power transmission unit 110, and the power supply conditions (operating conditions) such as the power transmission amount and the billing conditions are balanced. When the communication request response indicates power supply rejection, the power reception control unit 24 ends the process without executing the power supply start preparation process.

In the power supply start preparation process, the power reception control unit 24 transmits a power supply request to the power transmission unit 110. The power supply request includes information related to power supply requested by the power receiving unit 120 to the power transmission unit 110, and includes, for example, a requested power transmission amount, a requested charging speed, whether the power receiving unit 120 can be charged, and the like. The requested amount of power transmission may be specified, for example, in watt hours (Wh) or in money. When the requested power transmission amount is designated by a monetary amount, the power amount for the designated monetary amount is transmitted. The charging speed may be specified at a level such as high speed or normal. In addition, the charging speed may be specified in such a manner as to fluctuate with the passage of time or the amount of stored electricity, for example. Information related to power supply such as the amount of power transmission and the charging speed requested by the power receiving unit 120 from the power transmission unit 110 is hereinafter referred to as a power supply condition request.

  In the first embodiment, power supply is started on the condition that the vehicle including the power receiving unit 120 is stopped or the engine is turned off. Therefore, the power reception control unit 24 outputs a stop state signal together with the power supply request. The stop state signal is a signal used to notify the power transmission unit 110 that the vehicle including the power reception unit 120 is stopped. Whether or not the vehicle is stopped is, for example, that the parking brake of the vehicle is applied, the ACC power to the vehicle-mounted device 1 is cut off (power is supplied only at the backup line), the vehicle Is detected by the vehicle-mounted device 1. The power reception control unit 24 of the power reception unit 120 receives a vehicle stop state notification from the in-vehicle device 1 and outputs a stop state signal.

  In the power supply start preparation process, for example, when charging the in-vehicle battery 133 of the vehicle in a pay parking lot, in addition to the power supply request, the charging conditions and the like are also exchanged with the power transmission unit 110.

  The power supply is started when the power transmission unit 120 and the power transmission unit 110 match the power transmission amount, the power transmission speed, the charging conditions, and the like by the power supply start preparation process. Details of the power supply start preparation process will be described later.

  FIG. 5 is a diagram illustrating an example of a functional configuration of the power transmission controller 117 of the power transmission unit 110. FIG. 5 shows the connection of the control signal system, and the connection of the power system (charging power transmission line) is omitted. The power transmission controller 117 operates as the determination unit 51, the power supply determination unit 52, and the power transmission control unit 53 by executing a communication establishment program stored in a memory (not shown) provided in the power transmission unit. Note that the determination unit 51 does not operate in the first embodiment. Therefore, the determination unit 51 will not be described here, but will be described in a second embodiment described later.

  The power feeding determination unit 52 receives the communication request output from the power receiving unit 120 through the data transmission / reception unit 112. When the power transmission unit 110 receives a communication request from the power reception unit 120, communication establishment processing is started in the power transmission unit 110.

The power supply determination unit 52 determines whether power can be supplied to the power receiving unit 120 based on the power receiving side information included in the communication request. For example, the power feeding determination unit 52 determines whether the power receiving unit 120 is a member power receiving unit registered in the power feeding service based on the identifier of the power receiving unit 120 included in the power receiving side information, or the specification of the power receiving unit 120 is the power transmitting unit. It is determined whether or not it conforms to the specification of 110, and whether or not power supply is possible is determined. In the specification information of the power transmission unit 110 and the power reception unit 120, for example, when performing wireless transmission using a coil or a standard of a wireless power transmission method such as an electromagnetic induction method, a magnetic field resonance method, a microwave transmission method, There are information such as the installation position of the coil in the parking space, the movable range of the coil, the diameter of the coil, the resonance frequency, etc., or the information on the standards of the parts. For example, the power supply determination unit 52 acquires information on the power receiving unit 120 such as the specification information of the power receiving unit 120 from the power supply facility management server 3 through the communication interface 119 by using the identifier of the power receiving unit 120.

  For example, when the power receiving unit 120 is not registered in the power supply service, or when the specifications of the power receiving unit 120 and the specifications of the power transmitting unit 110 do not match, the power feeding determination unit 52 rejects power feeding to the power receiving unit 120. Determine. For example, when the power reception unit 120 is registered as a power supply target or when the standard of the power reception unit 120 and the standard of the power transmission unit 110 are compatible, the power supply determination unit 52 permits the power supply to the power reception unit 120. Determine. The power feeding determination unit 52 outputs a determination result on whether power can be supplied to the power receiving unit 120 to the power transmission control unit 53.

  The power transmission control unit 53 obtains, as an input, a determination result on whether power supply from the power supply determination unit 52 to the power receiving unit 120 is possible. When the determination result of whether or not power supply to the power receiving unit 120 is possible is power rejection, the power transmission control unit 53 outputs the power rejection to the power reception unit 120 as a communication request response. Alternatively, the power transmission control unit 53 may output a warning signal to the power receiving unit 120. Alternatively, the power transmission control unit 53 may ignore the communication request without transmitting the communication request response.

  When the determination result of whether or not power supply to the power receiving unit 120 is possible is power supply permission, the power transmission control unit 53 outputs the power supply permission to the power reception unit 120 through the data transmission / reception unit 112 as a communication request response. When the communication request response is transmitted, the power transmission unit 110 ends the communication establishment process.

  When the power transmission control unit 53 receives a power supply request from the power receiving unit through the data transmission / reception unit 112, the power transmission control unit 53 starts power supply start preparation processing in the power transmission unit 110. In the power supply start preparation process, the power transmission control unit 53 transmits the power transmission capability of the power transmission unit 110, charging information, and the like to the receiving unit through the data transmission / reception unit 112, and negotiates with the power receiving unit 120 on the power transmission amount, the transmission speed, the charging conditions, and the like. And set conditions (operation conditions) for starting power supply. When the power transmission unit 110 and the power receiving unit 120 match the power transmission amount, the power transmission speed, the charging conditions, and the like by the power supply start preparation process, the power transmission unit 110 starts power supply. Details of the power supply start preparation process will be described later.

(Details of communication establishment process and power supply start preparation process)
FIG. 6A is an example of a flowchart of communication establishment processing. FIG. 6B is an example of a flowchart of a power supply start preparation process performed after the communication establishment process. 6A and 6B, it is assumed that the vehicle including the power receiving unit 120 parks in a charged parking space where the power transmission unit 110 is installed and charges the in-vehicle battery 133. In the power receiving unit 120, the power receiving unit process shown in FIG. 6A is repeatedly executed while the power receiving unit 120 is operating. In the power transmission unit 110, while the power transmission unit 110 is operating, the power transmission unit process shown in FIG. 6A is repeatedly executed, and the power transmission controller 127 enters a state of waiting for reception of a communication request.

In OP <b> 1, the power reception controller 127 acquires the remaining battery level of the in-vehicle battery 133 mounted on the vehicle from the charge / discharge control device 131 periodically (for example, every second). Note that the remaining battery level acquired here can be acquired in the form of, for example, a ratio to full charge, a travelable time, a travelable distance, and the like. Thereafter, the process proceeds to OP2. The battery remaining amount acquiring unit 21 is realized by the processing of OP1.

  In OP2, the power receiving controller 127 determines whether or not the in-vehicle battery 133 needs to be charged by determining whether or not the remaining battery level is equal to or greater than a predetermined threshold. The power receiving controller 127 determines that charging is unnecessary when the remaining battery level is equal to or greater than a predetermined threshold. The power receiving controller 127 determines that charging is necessary when the remaining battery level is less than a predetermined threshold.

  When the power receiving controller 127 determines that the in-vehicle battery 133 is not required to be charged (OP2: NO), the process is finished. When the power receiving controller 127 determines that the in-vehicle battery 133 needs to be charged (OP2: YES), the communication establishment process in the power receiving unit 120 is started, and the process proceeds to OP3.

  In OP3, the power receiving controller 127 determines whether or not the communication request output condition is detected. For example, when a vehicle including the power reception unit 120 enters a parking space where the power transmission unit 110 is installed, and any of the communication request output conditions (1) to (5) is satisfied, the power reception controller. 127 detects that the communication request output condition is satisfied (OP3: YES), and the process proceeds to OP4. If the communication request output condition is not satisfied (OP3: NO), the process ends. The determination unit 22 is realized by the process of OP3.

  In OP4, the power receiving controller 127 generates power receiving side information from preset power receiving settings and the like, and the process proceeds to OP5. The power receiving side information generation unit 23 is realized by the process of OP4.

  In OP5, the power receiving controller 127 includes the generated power receiving side information in the communication request and outputs the communication request through the data transmission / reception unit 122. Thereafter, the process proceeds to OP10.

  In OP6, the power transmission controller 117 determines whether a communication request is received from the power receiving unit 120 through the data transmission / reception unit 112. When receiving the communication request (OP6: YES), the power transmission controller 117 proceeds to the process of OP7 to start the communication establishment process in the power transmission unit 110. If a communication request has not been received (OP6: NO), the process ends.

  In OP7, the power transmission controller 117 determines whether power can be supplied to the power receiving unit 120 based on the power receiving side information included in the communication request. For example, the power transmission controller 117 acquires the standard of the power receiving unit 120 from the information center server 2 based on the identifier of the power receiving unit 120 included in the power receiving side information, determines whether or not it conforms to the standard of the power transmission unit 110, and Determine whether or not. The power feeding determination unit 52 is realized by the processing of OP7.

  If the result of determining whether or not power can be supplied to the power receiving unit 120 is power supply permission (OP7: YES), the process proceeds to OP8. If the result of determining whether power can be supplied to the power receiving unit 120 is not possible (OP7: NO), the process proceeds to OP9.

In OP8, the power transmission controller 117 transmits the power supply permission to the power receiving unit 120 as a communication request response through the data transmission / reception unit 112. When the power transmission controller 117 transmits a communication request response, the communication establishment process in the power transmission unit 110 ends. The power transmission controller 117 waits for a power supply request from the power receiving unit 120, and the process is OP1.
Proceed to step 3.

  In OP9, the power transmission controller 117 transmits the power rejection as a communication request response to the power receiving unit 120 through the data transmission / reception unit 112, and ends the process.

  In OP <b> 10, the power receiving controller 127 of the power receiving unit 120 receives the communication request response from the power transmitting unit 110 through the data transmission / reception unit 122. When the communication request response is received, the communication establishment process in the power receiving unit 120 ends, and the process proceeds to OP11.

  In OP11, the power receiving controller 127 determines whether power can be supplied based on the communication request response. When the communication request response is power supply permission (OP11: YES), power supply start preparation processing in the power receiving unit 120 is started, and the process proceeds to OP12. If the communication request response is power supply rejection (OP11: NO), power supply is not performed, and the process of the power reception unit 120 ends.

  In OP12, the power reception controller 127 transmits a power supply request to the power transmission unit 110. For example, the power supply request includes a power supply condition request (requested power transmission amount, charging speed, etc.), whether the power receiving unit 120 can be charged, and the like. The power receiving controller 127 is notified from the vehicle-mounted device 1 that the vehicle is in a stopped state, and outputs a stopped state signal from the data transmission / reception unit 122. Thereafter, the power receiving controller 127 enters a power receiving request response waiting state, and the process proceeds to OP15.

  In OP <b> 13, the power transmission controller 117 of the power transmission unit 110 receives the power supply request through the data transmission / reception unit 112. When the power supply request is received, a power supply start preparation process in the power transmission unit 110 is disclosed. Moreover, the power transmission controller 117 confirms that the stop state signal transmitted with the power supply request is received. Thereafter, the process proceeds to OP14.

  In OP14, the power transmission controller 117 includes a power transmission request including the power transmission capability of the power transmission unit 110, whether or not a power supply condition request such as a power transmission amount and a charging speed included in the power supply request, and whether or not the power transmission unit 110 can be charged. The response is output to the power receiving unit 120. Whether or not the power supply condition request requested by the power supply request is acceptable is determined based on, for example, the power transmission capability of the power transmission unit 110. Whether or not charging is possible is determined based on the state of the power transmission unit 110, for example. For example, refusal of charging is determined due to a failure of a component provided in the power transmission unit 110 or the like. Whether or not charging is possible may be determined based on whether or not a stop state signal transmitted together with the power supply request is received. For example, when the power transmission controller 117 does not receive the stop state signal, the power transmission controller 117 determines to reject charging. Thereafter, the process proceeds to OP16.

  In OP15, the power reception controller 127 of the power reception unit 120 receives the power supply request response output from the power transmission unit 110. In the case where permission for the power supply condition request included in the power supply request response is permitted, the power receiving controller 127 holds the requested power supply condition. When the power supply condition request included in the power supply request response is rejected, the power receiving controller 127 holds the power transmission capability of the power transmission unit 110 included in the power supply request response as the power supply condition. Further, when charging rejection is included in the power supply request response, the power supply start preparation process in the power receiving unit 120 ends.

In OP13, when it is not confirmed that the stop state signal is transmitted from the power receiving unit 120, the power transmission controller 117 may not transmit a power supply request response in OP14, for example. When the power supply request response is not transmitted from the power transmission unit 110 (when the power reception controller 127 cannot receive the power supply request response), the power reception controller 127 finishes the power supply start preparation process after a predetermined time has elapsed from the transmission of the power supply request. At the same time, the processing in the power receiving unit 110 ends. When the power receiving controller 127 is not notified from the in-vehicle device 1 that the vehicle is in a stopped state, the power supply request may not be transmitted in OP12.

In OP <b> 16, the power transmission controller 117 of the power transmission unit 110 transmits the charging condition to the power receiving unit 120 when transmitting a power supply request response in OP <b> 14. The charging condition is, for example, a charge per 1 kilowatt hour (kWh) of transmitted power, and is one of the settings for power transmission set in the power transmission unit 110 in advance. When transmitting the charging condition, the power transmission controller 117 enters a condition waiting state for receiving a condition acknowledgment response, and the process proceeds to OP19.

  In OP17, the power receiving controller 127 of the power receiving unit 120 receives the charging condition from the power transmitting unit 110. For example, the power receiving controller 127 transmits the charging condition to the in-vehicle device 1, and the in-vehicle device 1 displays the charging condition on the input / output device 8 (touch panel display). When the user of the vehicle-mounted device 1 visually recognizes the charging condition and approves the charging condition by, for example, pressing an OK button on the touch panel display, the vehicle-mounted device 1 transmits a signal indicating the charging condition approval to the power receiving controller 127.

  In OP <b> 18, the power reception controller 127 transmits a charging condition approval to the power transmission unit 110. For example, when the user of the vehicle including the power receiving unit 120 has selected to pay with a credit card, the user's registration information and the like are included in the accounting condition approval. The user registration information includes a user identifier, a vehicle identifier, and the like. This user registration information is transmitted to the power transmission unit 110 together with the approval of the charging condition, and is transmitted from the power transmission unit 110 to the power supply equipment system 300 or the center system 200 together with the identifier of the power transmission unit 110 and the like. The power supply facility management server 3 or the information center server 2 holds information such as a user identifier and a credit card number used for payment. When the user registration information is received from the power transmission unit 110, the user registration information is displayed. Based on this, billing information (such as a power supply fee) for the user is generated. The power supply fee will be settled later by the user's credit card.

  In addition, when the user of the vehicle including the power receiving unit 120 has selected to pay with a prepaid card, for example, at OP18, the power receiving controller 127 transmits an accounting condition approval and sets the identification number of the prepaid card. You may send it. In this case, the power transmission controller 117 of the power transmission unit 110 acquires the balance of the prepaid card from the power supply facility management server 3 or the information center server 2. Thereafter, power feeding is started. In this case, the power transmission unit 110 does not supply power beyond the balance of the prepaid card.

  When the power receiving controller 127 transmits the charging condition approval to the power transmission unit 110, the power receiving controller 127 enters a power receiving enabled state, and the power supply start preparation process in the power receiving unit 120 ends.

  In OP <b> 19, the power transmission controller 117 of the power transmission unit 110 receives the charging condition approval from the power receiving unit 120. In OP20, the power transmission controller 117 outputs a power feeding start instruction signal to the converter 113, the resonance control unit 116, and the oscillation circuit 118, and starts power feeding. When the power supply is started, the power supply start preparation process in the power transmission unit 110 ends.

  In OP <b> 21, the power reception controller 127 of the power reception unit 120 starts to receive power when the power transmission unit 110 starts to supply power.

  In OP22, the power transmission controller 117 of the power transmission unit 110 ends power transmission when the amount of transmitted power reaches the amount requested by the power supply request. The power transmission controller 110 outputs the power transmission end of the power receiving unit 120. Thereby, the process in the power transmission unit 110 is completed.

  In OP23, when the power reception controller 127 of the power reception unit 120 receives the power transmission end transmitted from the power transmission unit 110, the power reception controller 127 ends the power reception. Thereby, the process in the power receiving unit 120 is completed. In each reception waiting state (including response waiting), a retransmission request may be made every predetermined time until reception, and the processing may be terminated when a timeout time elapses.

  The power reception control unit 24 is realized by the processing of OP2, OP5, OP10, OP11, OP12, OP15, OP17, OP18, OP21, and OP23. The power transmission control unit 53 is realized by the processing of OP6, OP8, OP9, OP13, OP14, OP16, OP19, OP20, and OP22.

  As described above, in the first embodiment, when it is detected that the communication request output condition such as the vehicle including the power receiving unit 120 approaches the power supply facility including the power transmitting unit 110 is satisfied, Between the unit 120 and the power transmission unit 110, communication establishment processing and power supply start preparation processing for power supply start by the wireless power transmission method are performed, and various pieces of information are exchanged. In the communication establishment process, communication between the power transmission unit 110 and the power reception unit 120 is established, and the power transmission unit 110 determines whether power can be supplied to the power reception unit 120 according to the standard of the power reception unit 120 or the like. In the power supply start preparation process, a condition (operation condition) for starting power supply is set by exchanging the requested power transmission amount and charging conditions. Accordingly, wireless communication can be performed between the power transmission unit 110 and the power reception unit 120, and the vehicle including the power reception unit 120 can be charged using the wireless power transmission method.

(Modification of the first embodiment)
In the first embodiment, the power receiving unit 120 includes the determination unit 22 and determines whether the communication request output condition is satisfied. Instead of this, the in-vehicle device 1 may include the determination unit 22 and determine whether or not the communication request output condition is satisfied. In this case, the in-vehicle device 1 operates as the determination unit 22 when the CPU 13 executes a communication establishment program stored in the ROM 11 or the HDD 12. When the determination unit 22 detects that the communication request output condition is satisfied, the in-vehicle device 1 notifies the power receiving unit 120 through the communication interface 9 that the communication request output condition is satisfied. Thereafter, as described in the first embodiment, the power receiving unit 120 generates power receiving side information and outputs a communication request including the power receiving side information.

  In the first embodiment, the power transmission unit 110 includes the power supply determination unit 52 and determines whether power can be supplied to the power supply unit 120. Instead, the power receiving unit 120 may include the power supply determination unit 52 and determine whether or not power can be received from the power transmission unit 110. In this case, the power reception control unit 24 of the power reception unit 120 outputs a communication request including a transmission request for information on the power transmission unit 110 such as a standard instead of the power reception side information. The power transmission control unit 53 of the power transmission unit 110 transmits a communication request response including information regarding the power transmission unit 110 such as a standard to the reception unit 120. In this way, the power receiving unit 120 acquires information related to the power transmission unit 110, and determines whether or not power can be received from the power transmission unit 110 by the power supply determination unit 52. When it is determined that power can be received, the power supply start preparation process described in the first embodiment is executed.

  In the first embodiment, communication in the communication establishment process and the power supply start preparation process is performed by communication between the data transmission / reception unit 112 of the power transmission unit 110 and the data transmission / reception unit 122 of the power reception unit 120. Instead, the communication in the communication establishment process and the power supply start preparation process is performed between the power supply facility management server 3 or the information center server 2 connected to the power transmission unit 110 and the vehicle-mounted device 1 mounted on the vehicle including the power reception unit 120. It may be performed by communication. In this case, the power transmission unit 110 receives a communication request or the like from the power receiving unit 120 from the power supply facility management server 3 or the information center server 2 through the communication interface 119. The power receiving unit 120 receives a communication request response from the power transmitting unit 110 from the in-vehicle device 1 through the communication interface.

  Communication in the communication establishment process and the power supply start preparation process is performed by communication between the power supply facility management server 3 or the information center server 2 connected to the power transmission unit 110 and the in-vehicle device 1 mounted on the vehicle including the power reception unit 120. In such a case, the in-vehicle device 1 may be provided with a battery remaining amount acquisition unit 21, a determination unit 22, a power reception side information generation unit 23, and a power reception control unit 24. In this case, the in-vehicle device 1 causes the CPU 13 to execute a communication establishment program stored in the ROM 11 or the HDD 12, whereby the battery remaining amount acquisition unit 21, the determination unit 22, and the power receiving side described in the first embodiment. The processing of the information generation unit 23 and the power reception control unit 24 is executed. When the communication establishment process and the power supply start preparation process are completed, the in-vehicle device 1 instructs the power receiving unit 120 to enter the power receiving state.

Second Embodiment
In the first embodiment, the power reception unit 120 transmits a communication request to the power transmission unit 110. In the second embodiment, the power transmission unit 110 transmits a communication request to the power reception unit 120. In the second embodiment, the description common to the first embodiment is omitted.

  The determination unit 51 (see FIG. 5) of the power transmission unit 110 detects that the communication request output condition is satisfied. Examples of communication request output conditions in the second embodiment include the following.

(A) It detects that the vehicle carrying the power receiving unit 120 has entered the parking space provided with the power transmission unit 110.
For detection of entry of the vehicle into the parking space, for example, DSRC entry detection may be used, or a sensor installed in the parking space may be used. The determination unit 51 receives a notification of vehicle entry detection from a device that detects entry of the vehicle into the parking space, and detects that the communication request output condition is satisfied.

(B) An operation by the user is detected.
For example, the determination is made by detecting an operation such as turning on a charging start switch installed in a parking space where the power transmission unit 110 is installed or inserting a parking ticket into a device installed in the parking space. The unit 51 detects that the communication request output condition is satisfied. The detection of these operations is performed by, for example, a switch or device installed in a parking space and notified to the power transmission unit 110.

(C) The operation of the parking facility (shutter) is detected.
For example, the determination unit 51 monitors the operation of a parking facility such as a shutter, and detects that the communication request output condition is satisfied by detecting an operation such as opening the shutter. In this case, for example, when the reception unit provided in the shutter receives a signal output from the remote controller, the control unit provided in the shutter opens the shutter and notifies the power transmission unit 110 of the shutter opening operation. The control unit provided in the shutter may close the shutter and notify the power transmission unit 110 of the shutter closing operation.

(D) Detecting the activation and release of a security system installed in a building including a parking space.
For example, when the vehicle including the power receiving unit 120 is parked in the parking space of the user's home, the determination unit 51 outputs a communication request by detecting the operation and release of the security system installed at home. Detect that the condition is met. In this case, for example, when the power transmission unit 110 and the security system are connected and the security system is activated and canceled, the security system notifies the power transmission unit 110 of activation and cancellation, and thereby the determination unit 51. Detects the activation and release of the security system.

  As the communication request output condition, one of the above (A)-(D) may be adopted, or a plurality may be adopted. The communication request output condition is not limited to the above (A)-(D).

  When determining that the communication request output condition is satisfied, the determination unit 51 transmits a notification to that effect to the power transmission control unit 53.

  When receiving a notification that the communication request output condition is satisfied from the determination unit 51, the power transmission control unit 53 outputs a communication request through the data transmission / reception unit 112. The power transmission control unit 53 outputs the communication request including, for example, a transmission request for the identifier of the power receiving unit. In addition to the identifier of the power receiving unit, the communication request may include a transmission request such as a standard of the wireless power transmission method of the power receiving unit and a hardware standard of parts.

  When the power supply determination unit 52 receives a communication request response from the power reception unit 120 through the data transmission / reception unit 112, the power supply determination unit 52 determines whether power supply is possible based on the identifier of the power reception unit 120 included in the communication request response. The determination as to whether power supply is possible is the same as the method described in the first embodiment. The power feeding determination unit 52 outputs a determination result on whether power can be supplied to the power receiving unit 120 to the power transmission control unit 53. The power transmission control unit 53 outputs the result of determining whether power can be supplied to the power receiving unit 120 to the power receiving unit 120 through the data transmission / reception unit 112.

  The power reception control unit 24 of the power reception unit 120 outputs a communication request response when receiving a communication request from the power transmission unit 110 when determining that power supply is necessary. The communication request includes a transmission request for the identifier of the power receiving unit 120, and the power reception control unit 24 transmits the communication request response including the identifier of the power receiving unit 120 in order to respond to the request.

  FIG. 7 is a diagram illustrating an example of a flowchart of a communication establishment process and a power supply start preparation process in the second embodiment. In FIG. 7, similarly to FIGS. 6A and 6B, it is assumed that the vehicle including the power receiving unit 120 parks in a charged parking space where the power transmission unit 110 is installed and charges the in-vehicle battery 133. . In the power receiving unit 120, the power receiving unit process shown in FIG. 7 is repeatedly executed while the power receiving unit 120 is operating. In the power transmission unit 110, the power transmission unit process shown in FIG. 7 is repeatedly executed while the power transmission unit 110 is operating.

  In OP31, the power reception controller 127 acquires the remaining battery level from the charge / discharge control device 131 of the in-vehicle battery 133 mounted on the vehicle. The battery remaining amount acquiring unit 21 is realized by the processing of OP31.

In OP32, the power reception controller 127 determines whether or not the in-vehicle battery 133 needs to be charged by determining whether or not the remaining battery level is equal to or greater than a predetermined threshold. The power receiving controller 127 determines that charging is unnecessary when the remaining battery level is equal to or greater than a predetermined threshold. Power reception control unit 24
Determines that charging is required when the remaining battery level is less than a predetermined threshold.

  When the power receiving controller 127 determines that the in-vehicle battery 133 is not required to be charged (OP32: NO), the process ends. If the power receiving controller 127 determines that the in-vehicle battery 133 needs to be powered (OP32: YES), the process proceeds to OP35, the power receiving controller 127 enters a standby state for receiving a communication request, and communication is established in the power receiving unit 120. Processing begins.

  In OP33, the power transmission controller 117 determines whether or not the communication request output condition is detected. For example, when the vehicle including the power receiving unit 120 enters a parking space where the power transmission unit 110 is installed, and any of the above communication request output conditions (A) to (D) is satisfied, the power transmission unit 110 of the power transmission controller 117 detects that the communication request output condition is satisfied. When it is detected that the communication request output condition is satisfied (OP33: YES), the process proceeds to OP34, and the communication establishment process in the power transmission unit 110 is started. If the communication request output condition is not satisfied (OP33: NO), the process is terminated. The determination part 51 is implement | achieved by the process of OP33.

  In OP34, the power transmission controller 117 includes the transmission request for the identifier of the power receiving unit in the communication request, and transmits the communication request through the data transmission / reception unit 112.

  In OP <b> 35, the power reception controller 127 of the power reception unit 120 determines whether a communication request is received from the power transmission unit 110 through the data transmission / reception unit 122. When the power reception controller 127 receives a communication request from the power transmission unit 110 (OP35: YES), the power reception controller 127 proceeds to the process of OP36. If a communication request has not been received (OP35: NO), the process ends. In OP36, the power reception controller 127 transmits a communication request response including the identifier of the power reception unit 120 to the power transmission unit 110.

  In OP37, the power transmission controller 117 of the power transmission unit 110 receives a communication request response from the power reception unit 120 through the data transmission / reception unit 112. In OP38, for example, the power transmission controller 117 of the power transmission unit 110 acquires the standard of the power reception unit 120 by the identifier of the power reception unit 120 included in the power reception side information, and determines whether or not it conforms to the standard of the power transmission unit 110. The power supply is determined.

  As a result of determining whether power can be supplied to the power receiving unit 120, if the power supply is permitted (OP38: YES), the process proceeds to OP39. As a result of determining whether or not power can be supplied to the power receiving unit 120, if power supply is not possible (OP38: NO), the process proceeds to OP40.

  In OP39, the power transmission controller 117 transmits a power feeding permission notification to the power receiving unit 120 through the data transmission / reception unit 112.

  In OP <b> 40, the power transmission controller 117 transmits a power supply rejection notification to the power reception unit 120 through the data transmission / reception unit 112. When the power supply permission notification or the power supply rejection notification is transmitted, the communication establishment process in the power transmission unit 110 ends, and the process in the power transmission unit ends.

  In OP <b> 41, the power reception controller 127 of the power reception unit 120 receives the power supply permission notification or the power supply rejection notification through the data transmission / reception unit 122. When the power supply permission notification or the power supply rejection notification is received, the communication establishment process in the power receiving unit 120 ends.

In OP42, when the power receiving unit 120 receives the communication request, the power receiving controller 127 of the power receiving unit 120 determines whether power can be supplied based on the communication request response. If the communication request response is power supply rejection (OP42: NO), power supply is not performed, and thus the processing in the power receiving unit 120 ends.

  When the communication request response is power supply permission (OP42: YES), the power reception controller 127 starts power supply start preparation processing. The subsequent power supply start preparation process is the same as the process described in FIG. 6B.

  In each reception waiting state (including response waiting), a retransmission request may be made every predetermined time until reception, and the processing may be terminated when a timeout time elapses.

  The power reception control unit 24 is realized by the processing of OP32, OP35, OP36, OP41, and OP42. The power transmission control unit 53 is realized by the processing of OP34, OP37, OP38, OP39, and OP40.

  As described above, the power transmission unit 110 may include a determination unit, detect that the communication request output condition is satisfied, and transmit a communication request to the power reception unit 120.

(Modification of the second embodiment)
In the second embodiment, the power transmission unit 110 includes the power supply determination unit 52 and determines whether power can be supplied to the power supply unit 120. Instead, the power receiving unit 120 may include the power supply determination unit 52 and determine whether or not power can be received from the power transmission unit 110. In this case, the power transmission control unit 53 of the power transmission unit 110 outputs information related to the power transmission unit 110 such as the standard of the power transmission unit 110 in the communication request. Thereby, the power receiving unit 120 acquires information about the power transmission unit 110, and determines whether or not power can be received from the power transmission unit 110 by the power supply determination unit 52 (provided in the power reception unit 120). When it is determined that power can be received, the power supply start preparation process described in the first embodiment is executed.

  In the second embodiment, the communication in the communication establishment process and the power supply start preparation process is performed by communication between the data transmission / reception unit 112 of the power transmission unit 110 and the data transmission / reception unit 122 of the power reception unit 120. Instead of this, the communication in the communication establishment process and the power supply start preparation process is carried out by the power supply facility management server 3 or the information center server 2 connected to the power transmission unit 110 and the vehicle-mounted device 1 mounted on the vehicle provided with the power reception unit 120. It may be performed by communication. In this case, the power transmission unit 110 receives a communication request or the like from the power receiving unit 120 from the power supply facility management server 3 or the information center server 2 through the communication interface 119. The power receiving unit 120 receives a communication request response from the power transmitting unit 110 from the in-vehicle device 1 through the communication interface.

Further, communication in the communication establishment process and the power supply start preparation process is performed by communication between the power supply facility management server 3 or the information center server 2 connected to the power transmission unit 110 and the vehicle-mounted device 1 mounted on the vehicle including the power reception unit 120. When performed, the information processing apparatus connected to the power transmission unit 110 may include a determination unit 51, a power supply determination unit 52, and a power transmission control unit 53. The information processing apparatus has, for example, a hardware configuration that is almost the same as that of the in-vehicle device 1. In this case, the information processing apparatus executes the communication establishment program stored in the ROM or the HDD by the CPU, whereby the determination unit 51 and the power supply determination unit 52 described in the first and second embodiments. Then, the process of the power transmission control unit 53 is executed. When the communication establishment process and the power supply start preparation process are completed, the information processing apparatus instructs the power transmission unit 110 to start power supply. The information processing apparatus acquires information about the power transmission unit 110 from the power transmission unit 110 through the communication interface.
Note that the power transmission unit side does not need to worry about power consumption for establishing communication (because there is no battery exhaustion or the like). For this reason, the communication request may be output at predetermined time intervals, assuming that the elapsed time from the previous communication request output is a predetermined time or more as the condition of OP33. Further, OP33 may be eliminated and the processing start may be set at a predetermined time interval.

DESCRIPTION OF SYMBOLS 1 Vehicle equipment 21 Battery remaining charge acquisition part 22 Determination part 23 Power receiving side information generation part 24 Power reception control part 51 Determination part 52 Power feeding determination part 53 Power transmission control part 110 Power transmission unit 120 Power reception unit

Claims (13)

A power transmission device that wirelessly transmits power, a power receiving device that is mounted on a mobile body that is driven by the power stored in the storage battery, and that can receive power transmitted wirelessly from the power transmission device and can be stored in the storage battery, A wireless power transmission system comprising:
A condition determination unit for determining whether or not a predetermined condition capable of performing preparation for starting wireless power transmission is satisfied;
An acquisition unit that establishes communication between the power transmission device and the power reception device when the predetermined condition is satisfied, and acquires information about the power transmission device and information about the power reception device;
A power supply determination unit that determines whether power can be supplied between the power transmission device and the power reception device based on the information about the power transmission device and the information about the power reception device;
Including wireless power transmission system. A power transmission device that wirelessly transmits power; and a power reception device that is mounted on a mobile body that is driven by the power stored in the storage battery and that can receive power transmitted wirelessly from the power transmission device and store the power in the storage battery. A wireless power transmission system,
A condition determination unit that determines whether or not a predetermined condition that can prepare for the start of wireless power transmission is satisfied;
An acquisition unit that establishes communication between the power transmission device and the power reception device when the predetermined condition is satisfied, and acquires information about the power transmission device and information about the power reception device;
Based on the information on the power transmission device and the information on the power reception device, an operation setting unit that sets operation conditions of the power transmission device and the power reception device;
Including wireless power transmission system. A power receiving device mounted on a mobile body driven by power stored in a storage battery, receiving power transmitted wirelessly from the power transmission device, and storing power in the storage battery,
A condition determination unit for determining whether or not a predetermined condition capable of performing preparation for starting wireless power transmission is satisfied;
An acquisition unit that establishes communication with the power transmission device by transmitting a communication request to the power transmission device when the predetermined condition is satisfied, and acquires information about the power transmission device;
Based on the information on the power transmission device and the information on the power reception device, a power reception determination unit that determines whether power can be received from the power transmission device;
Including a power receiving device. A power receiving device mounted on a mobile body driven by power stored in a storage battery, receiving power transmitted wirelessly from the power transmission device, and storing power in the storage battery,
An acquisition unit that establishes communication with the power transmission device and acquires information about the power transmission device by receiving a communication request from the power transmission device when a predetermined condition capable of preparing to start wireless power transmission is satisfied When,
Based on the information on the power transmission device and the information on the power reception device, a power reception determination unit that determines whether power can be received from the power transmission device;
Including a power receiving device. A power receiving device that is mounted on a mobile body that is driven by power stored in a storage battery, can receive power transmitted wirelessly from the power transmission device, and can be stored in the storage battery,
A condition determination unit that determines whether or not a predetermined condition that can prepare for the start of wireless power transmission is satisfied;
An acquisition unit that establishes communication with the power transmission device by transmitting a communication request to the power transmission device when the predetermined condition is satisfied, and acquires information about the power transmission device;
Based on the information on the power transmission device and the information on the power reception device, an operation setting unit that sets operation conditions of the power transmission device and the power reception device;
Including a power receiving device. A power receiving device that is mounted on a mobile body that is driven by power stored in a storage battery, can receive power transmitted wirelessly from the power transmission device, and can be stored in the storage battery,
An acquisition unit that establishes communication with the power transmission device and acquires information about the power transmission device by receiving a communication request from the power transmission device when a predetermined condition capable of preparing to start wireless power transmission is satisfied When,
Based on the information on the power transmission device and the information on the power reception device, an operation setting unit that sets operation conditions of the power transmission device and the power reception device;
Including a power receiving device. A power transmission device that is mounted on a mobile body that is driven by power stored in a storage battery, that receives power transmitted wirelessly and that can be stored in a storage battery, and that transmits power wirelessly,
An acquisition unit that establishes communication with the power receiving device and acquires information about the power receiving device by receiving a communication request from the power receiving device when a predetermined condition for preparing to start wireless power transmission is satisfied When,
A power supply determination unit that determines whether or not power can be supplied to the power receiving device based on the information about the power transmitting device and the information about the power receiving device;
Including power transmission equipment. A power transmission device that is mounted on a mobile body that is driven by power stored in a storage battery, that receives power transmitted wirelessly and that can be stored in a storage battery, and that transmits power wirelessly,
A condition determination unit that determines whether or not a predetermined condition that can prepare for the start of wireless power transmission is satisfied;
An acquisition unit that establishes communication with the power receiving device by acquiring a communication request to the power receiving device when the predetermined condition is satisfied, and acquires information about the power receiving device;
A power supply determination unit that determines whether or not power can be supplied to the power receiving device based on the information about the power transmitting device and the information about the power receiving device;
Including power transmission equipment. A power transmission device that is mounted on a mobile body that is driven by power stored in a storage battery, that receives power transmitted wirelessly and that can be stored in a storage battery, and that transmits power wirelessly,
An acquisition unit that establishes communication with the power receiving device and acquires information about the power receiving device by receiving a communication request from the power receiving device when a predetermined condition for preparing to start wireless power transmission is satisfied When,
Based on the information on the power transmission device and the information on the power reception device, an operation setting unit that sets operation conditions of the power transmission device and the power reception device;
Including power transmission equipment. A power transmission device that is mounted on a mobile body that is driven by power stored in a storage battery, that receives power transmitted wirelessly and that can be stored in a storage battery, and that transmits power wirelessly,
A condition determination unit that determines whether or not a predetermined condition that can prepare for the start of wireless power transmission is satisfied;
An acquisition unit that establishes communication with the power receiving device by acquiring a communication request to the power receiving device when the predetermined condition is satisfied, and acquires information about the power receiving device;
Based on the information on the power transmission device and the information on the power reception device, an operation setting unit that sets operation conditions of the power transmission device and the power reception device;
Including power transmission equipment. A power transmission device that wirelessly transmits power, a power receiving device that is mounted on a mobile body that is driven by the power stored in the storage battery, and that can receive power transmitted wirelessly from the power transmission device and can be stored in the storage battery, A wireless power transmission support method executed in a wireless power transmission system including:
Determining whether a predetermined condition capable of preparing to start wireless power transmission is satisfied;
Establishing communication between the power transmission device and the power receiving device when the predetermined condition is satisfied, obtaining information about the power transmission device and information about the power reception device;
Determining whether power can be supplied between the power transmitting device and the power receiving device based on the information regarding the power transmitting device and the information regarding the power receiving device;
A wireless power transmission support method including: A power transmission device that wirelessly transmits power; and a power reception device that is mounted on a mobile body that is driven by the power stored in the storage battery and that can receive power transmitted wirelessly from the power transmission device and store the power in the storage battery. A wireless power transmission support method executed in a wireless power transmission system,
Determining whether a predetermined condition that can prepare for starting wireless power transmission is satisfied; and
Establishing communication between the power transmission device and the power receiving device when the predetermined condition is satisfied, obtaining information about the power transmission device and information about the power reception device;
Based on information on the power transmission device and information on the power reception device, setting operating conditions of the power transmission device and the power reception device;
A wireless power transmission support method including: Information regarding the power transmission device is specification information of the power transmission device,
Information about the power receiving device is specification information of the power receiving device,
The power supply determination unit determines whether power can be supplied between the power transmission device and the power reception device by determining whether the specification of the power transmission device and the specification of the power reception device are suitable for power supply. The wireless power transmission system according to claim 1.

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