Wireless power supply system and wireless power supply method

Abstract

To reduce the load on the power transmission when operating multiple electronic devices. [Solution] One aspect of the present disclosure is a wireless power supply system comprising a power transmitter and a plurality of power receivers, wherein one or more electronic devices are connected to each of the plurality of power receivers, wherein the power transmitter sequentially supplies power to each of the plurality of power receivers based on schedule information including information indicating the power supply order of the plurality of power receivers and the power supply period for each of the plurality of power receivers, and each of the plurality of power receivers operates the electronic devices connected to its device during the period in which power is supplied by the power transmitter.

Description

[Technical Field]

[0001] The present invention relates to a wireless power feeding system and a wireless power feeding method. [Background Art]

[0002] Conventionally, a technique for supplying power from a wireless power transmitter to a power receiver via wireless power feeding is known. For example, Patent Document 1 describes a wireless rechargeable battery, and discloses a configuration in which an antenna is provided on a housing of the wireless rechargeable battery. This enables the power receiver to be charged wirelessly. The charging device described in Patent Document 2 acquires charging target information including at least identification information of a charging target device when the charging target device is connected to a charging unit, and generates charging information including a charging priority for charging the charging target device based on information of a remaining power value of a battery provided in an electronic device, electronic device information, and the identification information included in the charging target information. [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent No. 7516443 [Patent Document 2] International Publication No. 2024 / 171853 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] When supplying power to multiple electronic devices located in different locations, one transmitter is required to power multiple receivers. For example, when multiple UHF reader / writers read information from multiple UHF tags, the processing load per UHF reader / writer is high, such as when multiple UHF reader / writers read information from multiple UHF tags. In such cases, the load on a single transmitter to power multiple UHF reader / writers becomes high. Note that while the reader / writer is a UHF reader / writer, other types of reader / writers, such as RFID reader / writers, may also be used. For example, if a power transmitter constantly transmits power to multiple receivers by applying a technology that continuously transmits beacon signals, as described in Patent Document 1, the load on the power transmitter will increase.

[0005] This disclosure is made in view of these circumstances and aims to provide a wireless power supply system and a wireless power supply method that can suppress the load on a power transmitter when operating multiple electronic devices. [Means for solving the problem]

[0006] This disclosure has been made to solve the above-mentioned problems, and one aspect of this disclosure is a wireless power supply system comprising a power transmitter and a plurality of power receivers, each of the plurality of power receivers having one or more electronic devices connected to it, wherein the power transmitter sequentially supplies power to each of the plurality of power receivers based on schedule information including information indicating the power supply order of the plurality of power receivers and the power supply period for each of the plurality of power receivers, and each of the plurality of power receivers operates the electronic devices connected to it during the period in which power is being supplied by the power transmitter.

[0007] Another aspect of the present disclosure is a wireless power supply method for a wireless power supply system comprising a power transmitter and a plurality of power receivers, each of which has one or more electronic devices connected, the wireless power supply method comprising: the steps of: the power transmitter sequentially supplying power to each of the plurality of power receivers based on schedule information including information indicating the power supply order of the plurality of power receivers and the power supply period for each of the power receivers; and each of the plurality of power receivers operating the electronic devices connected to its device during the period in which power is being supplied by the power transmitter. [Effects of the Invention]

[0008] According to one aspect of the present invention, the load on the power transmitter can be suppressed when operating multiple electronic devices. [Brief explanation of the drawing]

[0009] [Figure 1] This is a top view showing an example of the arrangement of each part in the wireless power supply system 1 according to the embodiment. [Figure 2] This is a top view showing an example of the arrangement of each part in the wireless power supply system 1 according to the embodiment. [Figure 3] This is a sequence diagram showing an example of the processing of the wireless power supply system 1 in the embodiment. [Figure 4] This figure shows an example of list information in the embodiment. [Figure 5] This is a diagram illustrating the power transmission operation by the power transmitter 100 in the embodiment. [Figure 6] This is a sequence diagram showing an example of the operation of the wireless power supply system 1 in the embodiment. [Figure 7] This is a block diagram showing another example of the power transmission unit 100 in the embodiment. [Figure 8] This figure shows another example of list information in the embodiment. [Figure 9] This is a diagram illustrating other power transmission operations performed by the power transmitter 100 in this embodiment. [Modes for carrying out the invention]

[0010] Hereinafter, a wireless power supply system and a wireless power supply method to which the present invention is applied will be described with reference to the drawings.

[0011] Figure 1 is a top view showing an example of the arrangement of each part in the wireless power supply system 1 according to the embodiment. The wireless power supply system 1 comprises, for example, one transmitter 100, an access point 200, a plurality of receivers 300, and a plurality of storage shelves 500. The wireless power supply system 1 comprises the transmitter 100 and the plurality of receivers 300, and one or more electronic devices are connected to each of the plurality of receivers 300. One or more electronic devices are, for example, items stored in the storage shelves 500. The power transmitter 100 and the multiple power receivers 300 are, for example, stationary devices. The power transmitter 100 and the power receivers 300 are installed within the power transmission range of the power transmitter 100. Each of the multiple power receivers 300 is associated one-to-one with each of the multiple storage shelves 500. Each of the multiple power receivers 300 is positioned at a distance from each of the storage shelves 500 that allows it to transmit radio waves and receive radio waves from each of the storage shelves 500. However, this is not limited to this configuration, and a single power receiver 300 may transmit radio waves to multiple storage shelves 500. The wireless power supply system 1 consists of a single transmitter 100 that transmits power to multiple receivers 300, each of which receives power to a reader / writer (not shown in Figure 1) as an electronic device to operate the respective electronic device, and each of the reader / writers reads the tag information of the inventory stored in the inventory shelves 500 corresponding to each of the multiple receivers 300.

[0012] Figure 2 is a block diagram showing an example of the configuration of the wireless power supply system 1 in the embodiment. The wireless power supply system 1 includes, for example, a power transmitter 100, an access point 200, a plurality of power receivers 300A, 300B, an edge processing unit 310, a plurality of antenna units 420A, 420B, a plurality of inventory shelves 500A, 500B, a power transmission control system 600, and an inventory management system 700. The power receiver 300A includes, for example, a power receiving unit 302A, and a reader / writer 410A wired-connected to the power receiving unit 302A. An antenna unit 420A is connected to the reader / writer 410A. The power receiver 300B includes, for example, a power receiving unit 302B, and a reader / writer 410B wired-connected to the power receiving unit 302B. An antenna unit 420B is connected to the reader / writer 410B. In the following description, when collectively referring to power receiver 300A and power receiver 300B, they are simply described as "power receiver 300"; when collectively referring to antenna unit 420A and antenna unit 420B, they are simply described as "antenna unit 420"; when collectively referring to inventory shelf 500A and inventory shelf 500B, they are simply described as "inventory shelf 500"; when collectively referring to power receiving unit 302A and 302B, they are simply described as "power receiving unit 302"; when collectively referring to reader / writer 410A and 410B, they are simply described as "reader / writer 410"; and when collectively referring to antenna unit 420A and 420B, they are simply described as "antenna unit 420".

[0013] The power transmitter 100 sequentially transmits power to each of the plurality of power receivers based on schedule information. The schedule information is information including information indicating the power transmission order of the plurality of power receivers 300 and the power transmission period of each of the power receivers 300. The power transmission period with the power receiver 300 may include a period required for completing the operations of the plurality of reader / writers 410 and UHF tags corresponding to the power receiver 300, and a period required for transmitting operation information of the plurality of reader / writers 410 and UHF tags to the power transmission control system 600. The schedule information is transmitted from, for example, the power transmission control system 600 or the power transmission control system 600. The schedule information may be created by a terminal of a user who manages the wireless power feeding system 1. Further, the schedule information may be automatically set by the power transmission control system 600 or the power transmission control system 600. For example, for each power transmitter 100, the schedule information only needs to be created such that the power transmitter 100 sequentially supplies power to the power receivers 300 based on the correspondence among the power transmitter 100, the plurality of power receivers 300, and the inventory shelves 500.

[0014] The power receiver 300 receives power via radio waves transmitted from the power transmitter 100, and supplies the received power to an electronic device. In the embodiment, the power transmitter 100 and the power receiver 300 transmit power using an existing wireless communication system such as a microwave system, for example. In addition, the power receiver 300 and the electronic device may exchange information with each other using existing wireless communication technologies such as WiFi (registered trademark), BLE (Bluetooth Low Energy), and LPWA (Low Power Wide Area), and the power transmitter 100 and the power receiver 300 may exchange information with each other using existing wireless communication technologies such as WiFi (registered trademark).

[0015] Each of the plurality of power receivers 300 operates an electronic device connected to the power receiver 300 during a period in which power is transmitted by the power transmitter 100. Although the electronic devices in the embodiment are a reader / writer 410 and an antenna unit 420, the present invention is not limited thereto. A power receiving unit 302 receives radio waves from the power transmitter 100 and supplies power to the reader / writer 410. The reader / writer 410 performs processing for performing wireless communication in, for example, UHF (Ultra High Frequency). The reader / writer 410 causes the antenna unit 420 to transmit UHF-band radio waves, and receives UHF-band radio waves returned from the UHF tag 502 via the antenna unit 420.

[0016] An edge processing unit 310 is a communication device that is, for example, wiredly connected to a plurality of power receivers 300 and communicatively connected to an access point 200. The edge processing unit 310 transmits information acquired from the reader / writer 410 to the access point 200 via wireless communication.

[0017] An inventory shelf 500 is a shelf that stores target articles whose inventory is managed by an inventory management system 700. A UHF tag 502 is attached to each of the target articles. In response to receiving radio waves from the antenna unit 420, the UHF tag 502 returns radio waves including tag ID and tag information indicating information related to the inventory shelf 500 or the target article.

[0018] The access point 200 is a communication device that is wirelessly connected to the power transmitter 100 and the edge processing unit 310, and communicates with the power transmission control system 600 and the inventory management system 700 via a communication network such as the Internet.

[0019] The power transmission control system 600 includes, for example, a server device for controlling the operation of the access point 200 and the power transmitter 100, and functions as a power transmission management device that manages the power transmission of the power transmitter 100. The power transmission control system 600 communicates with the power transmitter 100 and the server device via the access point 200 and controls the power transmission of the power transmitter 100. In this embodiment, the access point 200 and the power transmission control system 600 function as a power transmission system that controls the power transmission of the power transmitter 100.

[0020] The inventory management system 700 is a server device that manages the inventory of target items in the inventory shelves 500. The inventory management system 700 acquires tag information returned by the UHF tag 502 via the power transmission control system 600 and performs management processing such as registering, updating, or deleting the tag information. In addition, the inventory management system 700, upon acquiring tag information for target items based on schedule information, compares the registered tag information with the acquired tag information and performs a clearing process for the registered tag information. The inventory management system 700 transmits inventory information based on the tag information to, for example, the terminal device of a user who manages the inventory shelves 500.

[0021] Figure 3 is a block diagram showing an example of a power transmission device 100 in an embodiment. The power transmitter 100 includes, for example, a power transmission unit 102, a power acquisition unit 104, a control unit 106, and a storage unit 108. The power transmission unit 102 is, for example, a communication circuit equipped with a power transmission antenna and an analog circuit that supplies power to the power transmission antenna. The power transmission unit 102 transmits radio waves for power supply using power from the commercial power source. The acquisition unit 104 acquires schedule information from the access point 200. The acquired schedule information is stored in the storage unit 108. The control unit 106 is an integrated circuit or the like that operates according to a pre-set program or the like.

[0022] The control unit 106 transmits power from the power transmission unit 102 to the power receiver 300 based on the schedule information stored in the memory unit 120. The control unit 106 may control at least one of the following: the transmission direction θ, transmission distance D, transmission power, and transmission frequency of the transmission radio waves to be transmitted to the power receiver 300. For example, the control unit 106 may select the frequency bands that power receivers 300A and 300B can handle, and transmit radio waves in the selected frequency bands from the power transmission unit 102, respectively. Alternatively, the control unit 106 may transmit radio waves in the transmission direction θ toward power receivers 300A and 300B by performing beamforming processing.

[0023] Figure 4 is a diagram showing an example of list information in the embodiment, and Figure 5 is a diagram illustrating the power transmission operation by the power transmitter 100 in the embodiment. The schedule information may include the list information shown in Figure 4. The list information is information that associates the following: power transmission information indicating each of the one or more power transmission units 100, power receiver information indicating each of the multiple power receivers 300, electronic equipment information indicating the UHF tags (electronic devices) connected to each of the multiple power receivers 300, and information indicating the power transmission order of the multiple power receivers 300 and the power transmission period for each power receiver 300. The power transmission information may be an equipment ID that uniquely identifies the power transmission unit 100. The power receiver information may be an equipment ID that uniquely identifies the power receiver 300. The electronic equipment information may be a tag ID that uniquely identifies the UHF tag.

[0024] As shown in Figure 5(a), the power transmitter 100 supplies power to the power receiver 1 during the power transmission period. The power transmission period includes the startup period of the reader / writer 410, the tag reading period, the tag information transmission period, and the shutdown period of the reader / writer 410. The startup period of the reader / writer 410 is the period from when the power transmitter 100 starts transmitting power until the power receiver 300 supplies the power received to the reader / writer 410 and the reader / writer 410 transmits UHF band radio waves. The tag reading period is the period from when the reader / writer 410 and antenna unit 420 transmit UHF band radio waves to the UHF tag and when radio waves from the UHF tag are received to obtain tag information. The tag information transmission period is the period required for the reader / writer 410 to transmit tag information. The shutdown period of the reader / writer 410 is the period from when the reader / writer 410 has finished transmitting tag information until the reader / writer 410 stops operating.

[0025] When the power transmission time T1 to the receiver 1 shown in Figure 5(a) has expired, the power transmission unit 100 transmits power to the receiver 2 during the power transmission time T2 shown in Figure 5(b). When the power transmission time T2 to the receiver 2 shown in Figure 5(b) has expired, the power transmission unit 100 transmits power to the receiver 3 during the power transmission time T3 shown in Figure 5(c). In this way, the power transmission unit 100 sequentially transmits power to each of the multiple receivers 300 based on the schedule information.

[0026] Figure 6 is a sequence diagram showing an example of the operation of the wireless power supply system 1 in the embodiment. First, the power transmission control system 600 and the inventory management system 700 transmit schedule information S100 to the access point 200, and the access point 200 transmits the schedule information S100 to the power transmitter 100. When the power transmitter 100 receives the schedule information S100, it stores the schedule information in the storage unit 108 (step ST100). When the power transmitter 100 determines, based on the schedule information, that the timing for transmitting power to the power receiver 300A has arrived, it starts transmitting a power transmission radio wave S102A to the power receiver 300A (step S102).

[0027] The power receiver 300 receives the transmission radio wave S102A and supplies the transmission power S104A to the reader / writer 410A. The reader / writer 410A starts up using the transmission power S104A (step ST104), reads the tag information of the UHF tag 502 (step ST106), and transmits the read tag information S106 to the access point 200 via the edge processing unit 310 (step S108). After transmitting the tag information S106, the reader / writer 410 stops operating (step ST110). The power transmitter 100 stops transmitting the transmission radio wave S102A after the power transmission period set by the schedule information.

[0028] The access point 200 receives the tag information S106 and relays it to the power transmission control system 600 and the inventory management system 700. The inventory management system 700 acquires the tag information S106 as operation information based on the operation of the reader / writer 410, and based on the acquisition of the tag information S106, performs a clearing process for the tag information (electronic device information) included in the list information and stores the processing result of the clearing process (step ST120).

[0029] Subsequently, when the power transmitter 100 determines, based on the schedule information, that the timing for transmitting power to the power receiver 300B has arrived, it starts transmitting a power transmission radio wave S102B to the power receiver 300B (step S130). The power receiver 300B receives the power transmission radio wave S102B and supplies power transmission S104B to the reader / writer 410B. In this way, the power transmitter 100, power receiver 300, reader / writer 410, access point 200, power transmission control system 600, and inventory management system 700 process each power receiver 300 sequentially.

[0030] The inventory management system 700 may send a completion notification S200 when it has received all the tag information included in the schedule information by operating all the transmitters 100 and receivers 300 included in the schedule information, and the access point 200 may send a completion notification S202 to the transmitter 100.

[0031] The inventory management system 700 and the power transmission control system 600 send a completion notification including a stop request to the power transmitter 100 based on the processing result of the clearing process. The power transmitter 100 may stop supplying power to the power receiver 300 in response to the stop request included in the completion notification and start supplying power to other power receivers 300 based on information indicating the power transmission order in the schedule information.

[0032] Figure 7 is a block diagram showing another example of the power transmission 100 in the embodiment. The power transmitter 100 is equipped with a beacon unit 110, and the power receivers 300A and 300B may be equipped with a beacon unit 304. The beacon unit 110 outputs a beacon signal, and the beacon unit 304 sends back a beacon signal upon receiving a beacon signal. The control unit 106 acquires the location information of the power receiver 300 based on the beacon signal received from the power receiver 300 by the beacon unit 110. The power transmitter 100 transmits power to each of the power receivers 300 using the location information of each of the power receivers 300.

[0033] Figure 8 shows another example of list information in the embodiment. The schedule information includes a list of information that includes the power transmission sequence in which power is transmitted to the first power receiver (receiver 1, 300A) and the second power receiver (receiver 2, 300B), the period for acquiring the location information A of the first power receiver before the start of the power transmission period of the first power receiver, the power transmission period of the first power receiver and the power transmission period of the second power receiver, and the period for acquiring the location information B of the second power receiver during the power transmission period of the first power receiver.

[0034] Figure 9 is a diagram illustrating other power transmission operations performed by the power transmitter 100 in this embodiment. As shown in Figure 9(a), before transmitting power to the receiver 1 during the power transmission period, the power transmitter 100 transmits a beacon signal from the beacon unit 110 during the position acquisition period shown in Figure 9(b), and acquires the position information of the receiver 1 based on the beacon signal returned from the receiver 1. The control unit 106 compares the position information of the receiver 1 included in the schedule information with the position information acquired during the position acquisition period, and starts transmitting power to the receiver 1 if the two position information matches within a certain range. Before the power transmission time T1 to the power receiver 1 expires, the power transmitter 100 sends a beacon signal to the power receiver 2 and obtains the location information of the power receiver 2 based on the beacon signal returned from the power receiver 2. The control unit 106 compares the location information of the power receiver 2 included in the schedule information with the location information obtained during the location acquisition period, and if the two location information matches within a range, it starts power transmission to the power receiver 2 after the power transmission time T1 of the power receiver 1 has expired. Similarly, before the power transmission time T2 to the power receiver 2 expires, the power transmitter 100 sends a beacon signal to the power receiver 3 and obtains the location information of the power receiver 3 based on the beacon signal returned from the power receiver 3. The control unit 106 compares the location information of the power receiver 3 included in the schedule information with the location information obtained during the location acquisition period, and if the two location information matches within a range, it starts power transmission to the power receiver 3 after the power transmission time T2 of the power receiver 2 has expired.

[0035] According to the wireless power supply system 1 described above, the transmitter 100 sequentially supplies power to each of the multiple power receivers 300 based on schedule information that includes information indicating the power supply order of the multiple power receivers 300 and the power supply period for each power receiver 300. Each of the multiple power receivers 300 can operate the electronic equipment connected to its device during the period in which power is being supplied by the transmitter 100. This wireless power supply system 1 can reduce the load on the transmitter 100 when operating multiple electronic devices. In other words, by using schedule information, the transmitter 100 and power receivers 300 can automatically and unattended read tag information, thereby reducing the processing load compared to simultaneously supplying power to multiple power receivers 300.

[0036] According to the wireless power supply system 1, the power transmission period for each power receiver 300 may include the period necessary for the operation of multiple electronic devices corresponding to the power receiver 300 to be completed, and the period necessary to transmit the operation information of the multiple electronic devices to the power transmission management device. As a result, the wireless power supply system 1 can allocate the necessary power transmission time to each power receiver 300 even if the number of electronic devices connected to the power receiver 300 differs.

[0037] According to the wireless power supply system 1, the transmitter 100 transmits power to each of the receivers 300 using the location information of each receiver, and the schedule information includes a power transmission sequence in which power is transmitted to the first receiver and then to the second receiver, a period for acquiring the location information of the first receiver before the start of the power transmission period for the first receiver, the power transmission period for the first receiver and the power transmission period for the second receiver, and a period for acquiring the location information of the second receiver during the power transmission period for the first receiver. Thus, according to the wireless power supply system 1, the transmitter 100 can authenticate the location information of the receivers 300 and transmit power to the receivers 300.

[0038] According to the wireless power supply system 1, a power transmission control system 600 and an inventory management system 700 are connected to one or more power transmitters 100. The system transmits schedule information to one or more power transmitters 100, and the schedule information is a list information that associates power transmitter information indicating each of the one or more power transmitters 100, power receiver information indicating each of the multiple power receivers 300, electronic equipment information indicating the electronic equipment connected to each of the multiple power receivers 300, and information indicating the power transmission order of the multiple power receivers 300 and the power transmission period for each of the power receivers 300. As a result, according to the wireless power supply system 1, the power transmitters 100 can sequentially transmit power to the power receivers 300 according to the list information.

[0039] According to the wireless power supply system 1, the power transmission control system 600 and the inventory management system 700 can acquire operation information based on the operation of electronic devices, perform a clearing process for the electronic device information included in the list information based on the acquisition of operation information, and store the processing result of the clearing process. As a result, the power transmission control system 600 and the inventory management system 700 can manage electronic devices by sequentially acquiring and clearing electronic device information as power is sequentially transmitted from the power transmitter 100 to the power receiver 300.

[0040] According to the wireless power supply system 1, the power transmission control system 600 and the inventory management system 700 send a stop request to the power transmitter 100 based on the processing result of the clearing process, and the power transmitter 100 can stop supplying power to the power receiver 300 in response to the stop request and start supplying power to the other power receivers 300 based on the information indicating the power supply order in the schedule information, and sequentially supply power to the power receivers 300 while confirming that the clearing process is completed.

[0041] The functions of the power transmitter 100 in the above-described embodiment may be implemented using a computer. In that case, the functions may be implemented by recording a program for implementing these functions on a computer-readable recording medium, loading the program recorded on this recording medium into a computer system, and executing it. Here, "computer system" includes hardware such as an OS and peripheral devices. Furthermore, "computer-readable recording medium" refers to portable media such as flexible disks, magneto-optical disks, ROMs, CD-ROMs, and storage devices such as hard disks built into a computer system. Moreover, "computer-readable recording medium" may also include those that dynamically hold programs for a short period of time, such as communication lines used when transmitting programs via networks such as the Internet or communication lines such as telephone lines, and those that hold programs for a certain period of time, such as volatile memory inside a computer system that acts as a server or client in such cases. Furthermore, the above-mentioned program may be for implementing a part of the functions described above, or it may be a program that can implement the above-mentioned functions in combination with a program already recorded in the computer system, or it may be implemented using a programmable logic device such as an FPGA (Field Programmable Gate Array).

[0042] Although various embodiments and variations have been described, these are merely examples and are not limited to these. For example, one embodiment or variation, or a part of one embodiment or variation, may be combined with one or more other embodiments or variations to realize one aspect of the present invention. [Explanation of symbols]

[0043] 1. Wireless power supply system 100 Power Transmitters 102 Power Transmission Section 104 Acquisition Department 106 Control Unit 108 Storage section 110 Beacon Unit 120 Storage section 200 access points 300 Power receiver 302 Power receiving section 304 Beacon Unit 310 Edge Processing Unit 410 Reader / Writer 420 Antenna section 500 stock shelves 502 UHF tag 600 Power transmission control system 700 Inventory Management System

Claims

1. A wireless power supply system comprising a power transmitter and a plurality of power receivers, wherein one or more electronic devices are connected to each of the plurality of power receivers, The power transmission unit sequentially transmits power to each of the multiple power receiving units based on schedule information that includes information indicating the power transmission order of the multiple power receiving units and the power transmission period for each of the multiple power receiving units. Each of the aforementioned multiple power receivers operates the electronic equipment connected to its device during the period in which power is being transmitted by the power transmitter. Wireless power supply system.

2. The wireless power supply system according to claim 1, wherein the power transmission period for each power receiver includes the period necessary for the operation of the plurality of electronic devices corresponding to the power receiver to be completed, and the period necessary for transmitting the operation information of the plurality of electronic devices to the power transmission management device.

3. The power transmitter uses the location information of each of the power receivers to transmit power to each of the power receivers. The schedule information includes a power transmission sequence in which power is transmitted to the first power receiver and then to the second power receiver; a period for acquiring the location information of the first power receiver before the start of the power transmission period of the first power receiver; the power transmission period of the first power receiver and the power transmission period of the second power receiver; and a period for acquiring the location information of the second power receiver during the power transmission period of the first power receiver. The wireless power supply system according to claim 2.

4. A power transmission management device is provided, which is connected to one or more of the aforementioned power transmission machines. The power transmission management device transmits the schedule information to one or more power transmission units. The schedule information is a list information that associates the following: power transmission information indicating each of the one or more power transmission units; power receiver information indicating each of the multiple power receivers; electronic equipment information indicating the electronic equipment connected to each of the multiple power receivers; and information indicating the power transmission order of the multiple power receivers and the power transmission period for each of the power receivers. The wireless power supply system according to claim 1 or 2.

5. The aforementioned power transmission management device is The operation information based on the operation of the electronic device is acquired, Based on the acquisition of the aforementioned operation information, the system performs a deleting process for the electronic device information included in the list information and stores the processing result of the deleting process. The wireless power supply system according to claim 4.

6. The power transmission management device transmits a stop request to the power transmission unit based on the processing result of the extinguishing process. The power transmission unit stops supplying power to the power receiver in response to the stop request, and starts supplying power to other power receivers based on the information indicating the power supply order in the schedule information. The wireless power supply system according to claim 5.

7. A wireless power supply method for a wireless power supply system comprising a power transmitter and a plurality of power receivers, wherein one or more electronic devices are connected to each of the plurality of power receivers, The steps include: the power transmission unit sequentially supplying power to each of the plurality of power receivers based on schedule information including information indicating the power supply order of the plurality of power receivers and the power supply period for each of the plurality of power receivers; Each of the plurality of power receivers operates the electronic equipment connected to its device during the period in which power is being transmitted by the power transmitter. A wireless power supply method, including

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