JP7324569B2 - Wireless power supply system - Google Patents

Description

The present invention relates to a wireless power supply device and a wireless power supply system.

For example, there is known a technique for managing received power based on identification information on the power receiving side and identification information on the power feeding side.

Patent No. 6234526

Patent Literature 1 described above discloses a device capable of accumulating a history of power transactions using transaction information in which power supply side identification information, power receiving side identification information, and power supply information are associated with each other. According to this device, it is possible to collectively manage from intermediation of power transactions to settlement. However, since this device cannot recognize the positional relationship between the power transmitting device and the power receiving device, there is a possibility that the timing of power transmission cannot be grasped and efficient power feeding can be realized.

The main invention for solving the above-mentioned problems is a wireless power supply device, a power receiving device wirelessly powered by the wireless power feeding device, and at a predetermined time, the wireless power feeding device approves wireless power feeding to the power receiving device. An approval device that transmits an approval signal, and a settlement device that settles an electricity bill, wherein the power receiving device includes: a location information transmission unit that transmits location information indicating a current location via a blockchain network; a power amount information transmitting unit that transmits power amount information indicating the amount of power to be supplied via a blockchain network; and a power receiving circuit that receives power wirelessly from the wireless power supply apparatus upon receiving the approval signal from the approval apparatus. , wherein the wireless power supply device includes a power transmission circuit that wirelessly supplies power to a power receiving circuit of the power receiving device based on the power amount information, and acquires location information indicating the location of the power receiving device via the blockchain network. a power supply determination unit that determines whether wireless power supply from the power transmission circuit to the power reception circuit is possible based on the position information; and the power supply determination unit determines that wireless power supply is possible. a distance calculation unit that calculates the distance between the power receiving circuit and the power transmission circuit; a power transmission frequency adjustment unit that specifies a resonance frequency and adjusts a first variable element of the power transmission circuit so that the power transmission circuit indicates the resonance frequency, and the approval device is configured to perform the authentication via the blockchain network. a second acquisition unit configured to acquire reservation information indicating a reservation for power reception at the predetermined time from the power receiving device, and based on the reservation information, the power receiving device can wirelessly receive power from the wireless power supply device at the predetermined time. a reservation determining unit that determines whether or not the power receiving device is in a state of being in a state, and if the reservation determining unit determines that the power receiving device is capable of receiving power wirelessly at the predetermined time, the wireless power feeding device transmits wireless power to the power receiving device. an approval unit that transmits the approval signal for approval of power supply to the power receiving device, and the settlement device settles an electricity fee according to the amount of power supplied to the power receiving device using virtual currency. The present invention relates to a wireless power supply system characterized by:
Other features of the present invention will become apparent from the accompanying drawings and the description herein.

According to the present invention, power can be efficiently supplied from the power transmission circuit to the power reception circuit by acquiring the position information.

It is a block diagram which shows an example of a wireless electric power feeding system. FIG. 2 is a diagram illustrating an example of a hardware configuration of a power receiving device; FIG. It is a table|surface which shows an example of a movement plan table. FIG. 2 is a diagram illustrating an example of a software configuration of a power receiving device; FIG. It is a figure which shows an example of the hardware constitutions of an approval apparatus. It is a table showing an example of an approval table. It is a figure which shows an example of the software configuration of an approval apparatus. It is a figure which shows an example of the hardware constitutions of a wireless electric power feeder. It is a table showing an example of a frequency table. It is a block diagram which shows an example of the power transmission circuit of a wireless electric power feeder. It is a figure which shows an example of the software configuration of a wireless electric power feeder. 4 is a flow chart showing an example of a processing procedure of the wireless power supply system;

At least the following matters will become apparent from the description of the present specification and the accompanying drawings. 1 to 12, the same reference numerals are used for the same parts.

===Configuration of Wireless Power Supply System 1===
The configuration of the wireless power supply system 1 will be described with reference to FIGS. 1 to 11. FIG.

The wireless power feeding system 1 is a system for appropriately charging the power receiving device 10 at a predetermined time at a predetermined place without delay while ensuring information security. FIG. 1 is a configuration diagram showing an example of a wireless power feeding system 1. As shown in FIG. As shown in FIG. 1, the wireless power feeding system 1 includes, for example, a power receiving device 10 on the user side, an approval device 20 in the electric power company, and an electric power company installed on-site, which are connected to each other via the Internet 200. and a wireless power supply device 30 . Although FIG. 1 shows that each of the power receiving device 10 and the wireless power feeding device 30 is composed of one unit, each of the power receiving device 10 and the wireless power feeding device 30 is composed of a plurality of units. good too. 1 shows that the approval device 20 is installed in the power company, the approval device 20 may be installed near the place where the wireless power supply device 30 is installed, and the installation The location is not limited.

The wireless power supply system 1 ensures the security of information communicated among the power receiving device 10, the approval device 20, and the wireless power supply device 30 using a blockchain network. As a result, it is possible not only to communicate information for supplying power to the power receiving device 10, but also to settle the electricity charges related to power reception using virtual currency. Further, the wireless power feeding system 1 can grasp when to receive power by transmitting the movement plan information of the power receiving device 10 to the wireless power feeding device 30 . Accordingly, it is possible to prevent a plurality of power receiving devices 10 from visiting the same wireless power supply device 30 to receive power during the same time period. Further, the wireless power supply system 1 can adjust the power transmission circuit 39 to have a resonance frequency by adjusting the variable capacitor 39c of the power transmission circuit 39 of the wireless power supply device 30 . As a result, power can be efficiently supplied from the wireless power supply device 30 to the power transmission device. The devices that constitute the wireless power supply system 1 will be described below.

The power receiving device 10 is a device to which power is supplied from the wireless power supply device 30 . The power receiving device 10 is, for example, an electric vehicle, a drone, a smartphone, or the like, and may be a device having the following hardware configuration. The hardware configuration and software configuration of the power receiving device 10 will be described below.

FIG. 2 is a diagram illustrating an example of a hardware configuration of the power receiving device 10. As illustrated in FIG. As shown in FIG. 2, the hardware configuration of the power receiving device 10 includes a processor 11, a memory 12, a storage device 13, an input device 14, an output device 15, a clock device 16, and a second communication unit 17. , a beacon communication unit 18 and a power receiving circuit 19 . The processor 11 is, for example, an MPU, a CPU, or the like. The memory 12 is, for example, RAM, ROM, NVRAM, or the like. The storage device 13 is, for example, RAM, ROM, NVRAM, or the like. The input device 14 is a user interface that receives an operation input from a user, and is, for example, an operation input device (keyboard, mouse, touch panel, etc.), a voice input device (microphone, etc.), or the like. The output device 15 is a user interface that provides various information to the user, and includes, for example, a display device (such as a liquid crystal monitor) and an audio output device (such as a speaker). The clock device 16 is a device that receives time information. The communication unit 17 is an interface for connecting to the network 200, and is, for example, a wireless LAN adapter, NIC (Network Interface Card), or the like. The beacon communication unit 18 is a device that communicates a beacon signal for generating position information with the beacon communication unit 38 of the wireless power supply device 30 .

The storage device 13 stores a migration plan table 10f illustrated in FIG. As exemplified in the figure, the movement plan table 10f includes a scheduled time when power supply is scheduled, a power transmission device ID that identifies the wireless power supply device 30, a power reception device ID that identifies the power reception device 10, a wireless power supply device ID, and a wireless power supply device ID. The power amount indicating the amount of power supplied from the power receiving apparatus 10 to the power receiving apparatus 10 and the current location indicating the position information transmitted from the power receiving apparatus 10 are associated with each other. Note that the power transmission device ID may be an identifier that identifies the power transmission device itself, or an identifier that identifies a device mounted on the power transmission device. The power receiving device ID may be an identifier that identifies the power receiving device 10 itself, or an identifier that identifies a device mounted on the power receiving device 10 .

The power receiving circuit 19 is a circuit to which power is supplied from the power transmitting circuit 39 of the wireless power supply device 30 . The power receiving circuit 19 includes a power receiving coil 19a and a variable capacitor 19b, as shown in FIG. The power receiving coil 19a is a coil to which an alternating current is applied to generate a magnetic field. The variable capacitor 19b adjusts the capacitance, for example, in order to efficiently supply power from the power transmission circuit 39 to the power reception circuit 19 . As a result, when the resonance frequency of the power transmission circuit 39 and the resonance frequency of the power reception circuit 19 resonate at the same frequency, in the power reception circuit 19, the inductive reactance (the power reception coil 19a) and the capacitive reactance (the variable capacitor 19b) cancel each other out. Since the inductive reactance no longer suppresses the output current, the efficiency of the power supply is improved. The variable capacitor 19b is configured, for example, by providing a dielectric so as to be sandwiched between a rotating electrode and a fixed electrode. The variable capacitor 19b can adjust the capacitance value by, for example, the facing area of the rotating electrode and the fixed electrode.

FIG. 4 is a diagram illustrating an example of the software configuration of the power receiving device 10. As illustrated in FIG. As shown in FIG. 4, the software configuration of the power receiving device 10 includes functions of an acquisition unit 10a, a position information creation unit, a power amount information transmission unit 10c, a movement plan creation unit 10d, and a power reception frequency adjustment unit 10e. have These functions are realized, for example, by the processor 11 of the power receiving device 10 reading and executing a program stored in the memory 12 . Note that these functions may be realized by hardware such as ASIC, for example. Alternatively, the processor 11 may read and execute a program stored in an external storage medium.

The acquisition unit 10 a has a function of acquiring various types of information from the wireless power supply device 30 . The various information includes distance information, movement plan information, and the like.

The location information transmission unit 10b has a function of generating the current location of the power receiving device 10 as location information based on information output from at least one of a GPS satellite (not shown) and the beacon communication unit 18 of the power receiving device 10.

The power amount information transmission unit 10c has a function of generating power amount information indicating the amount of power supplied to the power receiving device 10 via the blockchain network.

The movement plan creation unit 10d has a function of creating a movement plan table 10f. The movement plan creating unit 10d stores the position information of the power receiving device 10 in the movement plan table 10f at predetermined time intervals. As a result, the wireless power supply device 30 can check the position of the power receiving device 10 at predetermined time intervals, and can also check the scheduled power feeding time and the amount of power to be fed. The movement plan creation unit 10d generates information described in the movement plan table 10f as movement plan information.

The power reception frequency adjustment unit 10 e has a function of adjusting the variable capacitor 19 b of the power reception circuit 19 based on the distance between the power reception coil 19 a of the power reception circuit 19 and the power transmission coil 39 e of the power transmission circuit 39 . As a result, the resonance frequency of the power receiving circuit 19 can be adjusted, so power is supplied efficiently.

The approval device 20 is a device that approves wireless power supply from the wireless power supply device 30 to the power receiving device 10 at a predetermined time. The hardware configuration and software configuration of the approval device 20 will be described below.

FIG. 5 is a diagram showing an example of the hardware configuration of the approval device 20. As shown in FIG. As shown in FIG. 5, the hardware configuration of the approval device 20 includes a processor 21, a memory 22, a storage device 23, an input device 24, an output device 25, a clock device 26, and a communication unit 27. is composed of Since each component is the same as the component of the power receiving device 10, only different components will be described below. As shown in FIG. 6 , the storage device 23 stores time, a power transmission device ID that identifies the power transmission device, and whether or not it is confirmed that the wireless power supply device 30 will supply power to the predetermined power reception device 10 at that time. is stored in an approval table 20d that associates the approval status indicating . For example, the approved state is indicated by "1", and the unapproved state is indicated by "0".

Next, as shown in FIG. 7, the software configuration of the approval device 20 has the functions of an acquisition section 20a, a reservation determination section 20b, and an approval section 20c. These functions are implemented, for example, by the processor 21 of the approval device 20 reading and executing a program stored in the memory 22 . Note that these functions may be realized by hardware such as ASIC, for example. Alternatively, the processor 21 may read and execute a program stored in an external storage medium.

The acquisition unit 20a has a function of acquiring reservation information indicating a reservation request for power reception at a predetermined time from the power receiving device 10 via a blockchain network. The reservation information includes, for example, a power receiving device ID, a power transmitting device ID, and time information indicating a scheduled time to supply power.

The reservation determination unit 20b has a function of determining whether or not the power receiving device 10 can receive power wirelessly from the wireless power supply device 30 at a predetermined time based on the reservation information. The reservation determination unit 20b refers to the approval table 20d and determines whether or not there is a reservation for the wireless power supply device 30 to supply power to a power receiving device 10 different from the power receiving device 10 that has transmitted the reservation information at a predetermined time. do. Instead of the predetermined time, it may be determined whether or not the wireless power reception is possible over a predetermined period of time.

When the reservation determination unit 20b determines that the power receiving device 10 is ready to receive power wirelessly at a predetermined time, the approval unit 20c transmits an approval signal to approve wireless power supply from the wireless power supply device 30 to the power receiving device 10. It is a function. Further, when the reservation determination unit 20b determines that the power receiving device 10 cannot receive power wirelessly at a predetermined time, the approval unit 20c receives a disapproval signal that does not approve wireless power supply from the wireless power supply device 30 to the power receiving device 10. to send. This can prevent a plurality of different power receiving devices 10 from visiting a predetermined wireless power supply device 30 at the same time to receive power.

The wireless power supply device 30 is a device that wirelessly supplies power to the power receiving device 10 . The hardware configuration and software configuration of the wireless power supply device 30 will be described below.

FIG. 8 is a diagram illustrating an example of the hardware configuration of the wireless power supply device 30. As illustrated in FIG. As shown in FIG. 8, the hardware configuration of the wireless power supply device 30 includes a processor 31, a memory 32, a storage device 33, an input device 34, an output device 35, a clock device 36, a communication unit 37, It is configured including a beacon communication unit 38 and a power transmission circuit 39 . Since each component is the same as the component of the power receiving device 10, only different components will be described below.

The storage device 33 stores a movement plan table 30f (same as the movement plan table 10f illustrated in FIG. 3) and a frequency table 30g. The frequency table 30g associates the power receiving device ID, the power transmitting device ID, the distance between the power receiving circuit 19 and the power transmitting circuit 39, and the resonance frequency indicating the frequency with the highest power feeding efficiency.

The beacon communication unit 38 is a device that communicates beacon signals with the beacon communication unit 18 of the power receiving device 10 .

The power transmission circuit 39 is a circuit that supplies power to the power reception circuit 19 . As shown in FIG. 10, the power transmission circuit 39 includes a power supply 39a, a converter 39b, a variable capacitor 39c, a control section 39d, and a power transmission coil 39e.

The power supply 39a is, for example, a device that supplies electric power to the power transmission circuit 39 . The power supply 39a is a device that is electrically connected to a converter 39b, which will be described later, to supply AC power.

The converter 39b is, for example, a device that converts AC power into DC power. The converter 39b is, for example, electrically connected to the power supply 39a and electrically connected to the power transmission coil 39e on the side opposite to the power supply 39a.

The variable capacitor 39c is a capacitor whose capacitance can be arbitrarily adjusted in order to adjust the resonance frequency of the power transmission circuit 39, for example. The variable capacitor 39c is configured, for example, by providing a dielectric so as to be sandwiched between a rotating electrode and a fixed electrode. The variable capacitor 39c can adjust the capacitance by, for example, the facing area of the rotating electrode and the fixed electrode.

The controller 39d is, for example, a device that adjusts the capacitance of the variable capacitor 39c based on the distance information. Note that it is preferable that the power receiving circuit 19 is also provided with a component similar to the control unit 39d.

式（１）において、ｆ０は、周波数を示し、送電コイル３９ｅのインダクタンス値と可変コンデンサ３９ｃの静電容量とに依存する。つまり、共振周波数は、可変コンデンサ３９ｃの静電容量を調整することにより変更される。又、ｋは、結合係数を示す。結合係数は、送電コイル３９ｅで発生する磁界が受電コイル１９ａに影響を及ぼす度合いを示す係数である。結合係数は、送電コイル３９ｅと受電コイル１９ａとの間の距離に依存する。つまり、距離情報に基づいて、可変コンデンサ３９ｃの静電容量を調整することにより、最も効率的な給電が可能となる。 The resonance frequency (f1) in the power transmission circuit 39 described above is represented by the following equation (1).

In Equation (1), f0 indicates the frequency and depends on the inductance value of the power transmission coil 39e and the capacitance of the variable capacitor 39c. That is, the resonance frequency is changed by adjusting the capacitance of the variable capacitor 39c. Also, k indicates a coupling coefficient. The coupling coefficient is a coefficient that indicates the degree to which the magnetic field generated by the power transmission coil 39e affects the power reception coil 19a. The coupling coefficient depends on the distance between the power transmitting coil 39e and the power receiving coil 19a. That is, by adjusting the capacitance of the variable capacitor 39c based on the distance information, the most efficient power supply becomes possible.

FIG. 11 is a diagram showing an example of the software configuration of the wireless power supply device 30. As shown in FIG. As shown in FIG. 11, the software configuration of the wireless power supply device 30 has functions of an acquisition unit 30a, a reservation registration unit 30b, a power supply determination unit 30c, a distance calculation unit 30d, and a power transmission frequency adjustment unit 30e. . These functions are realized, for example, by reading and executing a program stored in the memory 32 by the processor 31 of the wireless power supply device 30 . Note that these functions may be realized by hardware such as ASIC, for example. Alternatively, the processor 31 may read and execute a program stored in an external storage medium.

Although FIG. 11 shows that the wireless power supply device 30 implements each function by one information processing device (computer), the present invention is not limited to this. For example, each function described above may be configured to be distributed and realized by two or more information processing apparatuses. In the following, as an example, it is assumed that each function is realized by one information processing apparatus.

The acquisition unit 30a has a function of acquiring movement plan information transmitted from the power receiving device 10 via the blockchain network. Further, the acquisition unit 30 a acquires reservation information from the power receiving device 10 or the approval device 20 .

The reservation registration unit 30b has a function of registering reservation information when the approval device 20 determines that the power receiving device 10 can receive power wirelessly from the wireless power supply device 30 at a predetermined time. The reservation information is temporarily stored, for example, in a storage device or memory.

The power supply determination unit 30c has a function of determining whether wireless power supply from the power transmission circuit 39 to the power reception circuit 19 is possible based on the position information. Specifically, the power supply determination unit 30c determines that the power receiving apparatus 10 has entered within a predetermined range of the predetermined installation position of the wireless power supply apparatus 30 based on the position information included in the movement plan information. Then, it is determined that wireless power supply is possible.

The distance calculation unit 30d has a function of calculating the distance between the power receiving circuit 19 and the power transmission circuit 39 when the power supply determining unit 30c determines that power can be supplied. The distance calculation unit 30 d calculates the distance between the power receiving circuit 19 and the power transmitting circuit 39 by referring to a predetermined database based on the beacon signal exchanged with the beacon communication unit 18 of the power receiving device 10 . Note that the beacon communication unit 18 of the power receiving device 10 receives the beacon signal transmitted from the beacon communication unit 38 of the wireless power supply device 30, and refers to the database based on the received beacon signal. A distance to the power transmission circuit 39 may be calculated. In this case, the power receiving device 10 transmits the distance information to the wireless power feeding device 30 . Note that the distance information indicating the distance between the power receiving circuit 19 and the power transmitting circuit 39 is not limited to one-dimensional information. may be

The power transmission frequency adjustment unit 30e refers to the frequency table 30g based on the distance information indicating the distance calculated by the distance calculation unit 30d, and specifies the optimum frequency when the power transmission circuit 39 wirelessly powers the power reception circuit 19. It is a function to Then, the power transmission frequency adjustment unit 30e outputs a control signal for adjusting the variable capacitor 39c of the power transmission circuit 39 to the control unit 39d. The controller 39d adjusts the inductance value of the variable capacitor 39c to a predetermined value based on the control signal. This allows the resonance frequency of the power transmission circuit 39 to match the resonance frequency of the power reception circuit 19 .

Various data handled by the wireless power supply system 1 may be added to the virtual currency on the blockchain network. As a result, various types of data can be transmitted and received between the devices, and the electricity bill corresponding to the amount of power supplied by the settlement device 100 can be settled in the virtual currency. The settlement device 100 is connected to the approval device 20 via the intranet 300 .

In the above description, the wireless power feeding system 1 includes the approval device 20 , but the approval device 20 does not have to be included. In this case, the wireless power supply device 30 may have the function of the approval device 20 .

===Processing Procedure of Wireless Power Supply System 1===
A processing procedure of the wireless power supply system 1 will be described with reference to FIG. 12 .

First, processing is started with the acquisition of the start signal by the power receiving device 10 as a trigger. The operator of the power receiving device 10 operates the power receiving device 10 to transmit the reservation information to the approval device 20 via the blockchain network (S10).

Approval devices 20 participating in the blockchain network then receive the reservation information. Upon receiving the reservation information, the approval device 20 refers to the approval table 20d and determines whether or not the wireless power supply device 30 has a reservation at the scheduled power supply time (S11).

If it is determined that there is a reservation (S11: NO), the approval device 20 transmits a non-approval signal indicating that the reservation cannot be accepted to the power receiving device 10 (S12). The power receiving device 10 changes the scheduled power feeding time or the wireless power feeding device 30 to receive power as necessary, and repeats the process again.

If it is determined that there is no reservation (S11: YES), the approval device 20 transmits reservation information to the wireless power supply device 30 via the blockchain network. The wireless power supply device 30 participating in the blockchain network registers the reservation information in its memory (S13). The wireless power supply device 30 transmits a reservation completion signal indicating that the reservation is completed to the approval device 20 (S14).

Next, upon receiving the reservation completion signal, the approval device 20 transmits an approval signal indicating that power supply is possible to the power receiving device 10 (S15).

Next, upon receiving the approval signal, the power receiving device 10 generates movement plan information including position information indicating the current location and power amount information indicating the power supply amount (S16). The power receiving device 10 transmits the movement plan information to the wireless power feeding device 30 via the blockchain network.

Next, the wireless power supply device 30 determines whether or not the wireless power supply device 30 exists at a position where the power receiving device 10 can be wirelessly powered based on the movement plan information (referring to the contents of the movement plan table 30f). (S17). When it is determined that the power receiving device 10 is not at a position where wireless power can be supplied (S17: NO), the wireless power feeding device 30 requests the power receiving device 10 to transmit movement plan information with updated position information. When it is determined that the power receiving device 10 exists at a position where wireless power can be supplied (S17: YES), the wireless power feeding device 30 connects the power transmitting circuit 39 and the power receiving circuit 19 based on the transmitted position information of the power receiving circuit 19 or the beacon signal. is calculated (S18).

Next, the wireless power supply device 30 refers to the frequency table 30g to identify the resonance frequency corresponding to the distance between the power transmission circuit 39 and the power reception circuit 19 . The wireless power supply device 30 adjusts the variable capacitor 39c so that the power transmission circuit 39 produces the specified resonance frequency (S19). As a result, power can be efficiently supplied from the power transmission circuit 39 to the power reception circuit 19 (S20, S21).

Note that instead of adjusting the resonance frequency by adjusting the variable capacitor 39c of the power transmission circuit 39 of the wireless power supply device 30, the variable capacitor 39c of the power reception circuit 19 of the power reception device 10 is adjusted to adjust the resonance frequency of the power reception circuit 19. By adjusting the power supply efficiency may be improved.

===Summary===
As described above, the wireless power supply device 30 according to the present embodiment acquires position information indicating the position of the power reception device 10 via the power transmission circuit 39 that wirelessly powers the power reception circuit 19 of the power reception device 10 and the blockchain network. a power supply determination unit 30c that determines whether wireless power supply from the power transmission circuit 39 to the power reception circuit 19 is possible based on the position information; and when the power supply determination unit 30c determines that wireless power supply is possible a distance calculation unit 30d for calculating the distance between the power receiving circuit 19 and the power transmitting circuit 39; and distance information indicating the distance calculated by the distance calculating unit 30d. and a power transmission frequency adjustment unit 30e that specifies the resonance frequency and adjusts the variable capacitor 39c of the power transmission circuit 39 so that the power transmission circuit 39 indicates the resonance frequency. According to the present embodiment, since the position information is not falsified, accurate position information can be acquired, and power can be efficiently supplied from the power transmission circuit 39 to the power reception circuit 19 .

Further, the wireless power supply device 30 according to the present embodiment acquires power amount information indicating the amount of power to be supplied to the power receiving device 10 via the blockchain network, and when the power supply determination unit 30c determines that power can be supplied, Power is supplied to the power receiving device 10 based on the power amount information. According to the present embodiment, it is possible to transmit power amount information while ensuring security, and to grasp the amount of power to be supplied by the wireless power supply device 30, thereby facilitating power amount management by the power company.

Further, the wireless power feeding system 1 according to the present embodiment includes a wireless power feeding device 30 and an approval device 20 that approves wireless power feeding from the wireless power feeding device 30 to the power receiving device 10 at a predetermined time. 20 includes an acquisition unit 20a that acquires reservation information indicating a reservation for power reception at a predetermined time from the power receiving device 10 via a blockchain network, and a wireless power supply device 30 that the power receiving device 10 at a predetermined time based on the reservation information. and when the reservation determination unit 20b determines that the power receiving apparatus 10 can receive power wirelessly at a predetermined time, the power receiving apparatus 30 receives power from the wireless power supply apparatus 30. and an approval unit 20c that transmits to the power receiving device 10 an approval signal that approves wireless power supply to the device 10 . According to this embodiment, since the reservation information is not tampered with in communication between the power receiving device 10 and the approval device 20, it is possible to accurately determine whether the wireless power feeding device 30 is in a state where wireless power can be supplied. It is possible to prevent duplication of reservations in a predetermined wireless power supply device 30 .

The wireless power feeding system 1 according to the present embodiment further includes a power receiving device 10 to which power is wirelessly fed from the wireless power feeding device 30, and the power receiving device 10 is a power receiving circuit 19 to which power is wirelessly fed from the power transmitting circuit 39 of the wireless power feeding device 30. and a location information transmitting unit 10b that transmits location information indicating the current location via a blockchain network. According to the present embodiment, the wireless power supply system 1 can be configured with the specific power receiving device 10 and the specific wireless power supply device 30, which facilitates system design.

Further, in the wireless power supply system 1 according to the present embodiment, the power receiving device 10 includes the acquisition unit 10a that acquires distance information indicating the distance calculated by the distance calculation unit 30d of the wireless power supply device 30, and based on the distance information, and a power reception frequency adjustment unit 10e that adjusts the variable capacitor 19b of the power reception circuit 19 so that the power reception circuit 19 exhibits the resonance frequency when the power reception circuit 19 is wirelessly powered from the power transmission circuit 39 . According to the present embodiment, the resonance frequency can also be adjusted in the power receiving device 10, so that power transmission efficiency can be further improved.

Further, in the wireless power feeding system 1 according to the present embodiment, the power receiving device 10 further includes a power amount information transmitting unit 10c that transmits power amount information indicating the amount of power to be fed via the blockchain network. According to the present embodiment, it is possible to acquire information on the amount of electric power to be supplied by the wireless power supply device 30, thereby facilitating the management of the amount of electric power by the electric power company.

It should be noted that the above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit and interpret the present invention. The present invention may be modified and improved without departing from its spirit, and the present invention also includes equivalents thereof.

1 Wireless power supply system 10 Power receiving device 10a Acquisition unit 10b Location information transmission unit 10c Power amount information transmission unit 10e Power reception frequency adjustment unit 19 Power reception circuit 20 Approval device 20a Acquisition unit 20b Reservation determination unit 20c Approval unit 30 Wireless power supply device 30a Acquisition unit 30c Power supply determination unit 30d Distance calculation unit 30e Power transmission frequency adjustment unit 39 Power transmission circuit

Claims (4)

a wireless power supply device;
a power receiving device wirelessly powered from the wireless power feeding device;
an approval device that, at a predetermined time, transmits an approval signal for approval of the wireless power feeding device to wirelessly power the power receiving device;
a settlement device for settlement of electricity charges;
with
The power receiving device
a location information transmission unit that transmits location information indicating the current location via a blockchain network;
a power amount information transmitting unit that transmits power amount information indicating the amount of power to be supplied via the blockchain network;
a power receiving circuit that receives power wirelessly from the wireless power supply device upon receiving the approval signal from the approval device;
has
The wireless power supply device
a power transmission circuit that wirelessly supplies power to a power receiving circuit of the power receiving device based on the power amount information;
a first acquisition unit that acquires position information indicating the position of the power receiving device via the blockchain network;
a power supply determination unit that determines whether wireless power supply from the power transmission circuit to the power reception circuit is possible based on the position information;
a distance calculation unit that calculates a distance between the power receiving circuit and the power transmission circuit when the power supply determination unit determines that wireless power supply is possible;
Based on the distance information indicating the distance calculated by the distance calculation unit, a resonance frequency is specified when the power transmission circuit wirelessly powers the power reception circuit, and the power transmission is performed so that the power transmission circuit indicates the resonance frequency. a transmission frequency adjustment unit that adjusts the first variable element of the circuit;
has
The approval device
a second acquisition unit that acquires reservation information indicating a reservation for power reception at the predetermined time from the power receiving device via the blockchain network;
a reservation determination unit that determines whether or not the power receiving device can receive power wirelessly from the wireless power supply device at the predetermined time based on the reservation information;
When the reservation determination unit determines that the power receiving device is ready to receive power wirelessly at the predetermined time, the approval signal for approval of wireless power supply from the wireless power feeding device to the power receiving device is sent to the power receiving device. an approval section that sends to
has
The wireless power supply system, wherein the payment device uses virtual currency to pay an electricity charge corresponding to the amount of power supplied to the power receiving device. The power receiving device
a third acquisition unit that acquires the distance information indicating the distance calculated by the distance calculation unit of the wireless power supply device;
a power reception frequency adjustment unit that adjusts a second variable element of the power reception circuit so that the power reception circuit indicates a resonance frequency when the power reception circuit is wirelessly powered from the power transmission circuit based on the distance information;
The wireless power supply system according to claim 1, comprising: The wireless power feeding system according to claim 1 or 2, wherein the power receiving device is an electric vehicle. The wireless power feeding system according to claim 1 or 2, wherein the power receiving device is a drone.

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