Power supply management system and power supply management method

Abstract

To provide a power transmission and reception system that makes it possible to increase the willingness of users of EVs and other mobile bodies including batteries to participate in VPPs.SOLUTION: A power supply system (1) includes a charge level recognition unit (32) that recognizes the charge level of a battery (7) installed on a mobile body (5). The power supply system (1) determines a power supply target to which power supply from the battery (7) is to be implemented on the basis of the charge level of the battery (7) and the current time when the mobile body (5) is in a state capable of supplying power from the battery (7) to a charging and discharging device (13).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power supply management system and a power supply management method. [Background technology]

[0002] In recent years, research and development has been conducted on virtual power plants (VPPs) that contribute to energy efficiency in order to ensure that more people have access to affordable, reliable, sustainable, and advanced energy. Among these, technologies such as V2X (Vehicle to X) that utilize electric vehicles (EVs) and the like have been developed to enable efficient energy use by timely discharging electricity stored in EV batteries and other devices (see Patent Document 1). In addition, rather than completing such energy management within a single customer's behind-the-meter (BTM), consideration is also being given to a retail electricity business that builds a network and controls multiple customers' resources to charge and discharge electricity in a timely manner. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-191044 Summary of the Invention [Problem to be solved by the invention]

[0004] In the system described in Patent Document 1, the charge priority and discharge priority of each EV are determined by comparing the difference or ratio between the current SOC (State of Charge) of the EV's battery and the required SOC based on the EV's planned use. EVs with higher discharge priority are then assigned power to other EVs and building facilities. As described above, when the discharge destination of an EV battery is determined based on the battery's current SOC and the required charging SOC, the power supply to the determined discharge destination may not necessarily be advantageous to the EV user. When this occurs, there is a problem that EV users may be less willing to participate in a VPP, hindering energy efficiency improvements that utilize a VPP. To address this problem, the present application aims to provide a power supply management system that can increase the willingness of users of mobile vehicles equipped with batteries, such as EVs, to participate in a VPP. [Means for solving the problem]

[0005] A first aspect for achieving the above object is a power supply management system that includes a charge amount recognition unit that recognizes the charge amount of a battery mounted on a mobile body, and when the mobile body is in a state where it is possible to supply power from the battery to a charging / discharging device, determines the power supply target to which power will be supplied from the battery based on the charge amount of the battery and the current time.

[0006] The above-mentioned power supply management system may include a power supply management system comprising: a charge amount recognition unit that recognizes the charge amount of a battery mounted on a mobile body; a planned use date and time recognition unit that recognizes the next planned date and time of use of the mobile body; an object attribute information recognition unit that acquires object attribute information indicating the attributes of multiple objects to which power can be supplied from the battery via a charging / discharging device; and a power supply object determination unit that, when the mobile body is in a state where power can be supplied from the battery to the charging / discharging device, determines from the multiple objects to which power will be supplied from the battery via the charging / discharging device based on the charge amount of the battery, the current time, the next planned date and time of use of the mobile body, and the object attribute information.

[0007] In the above-mentioned power supply management system, the power supply object determination unit may be configured to determine, based on the object attribute information, as the power supply object, one of the plurality of objects that is recognized as an object used by a user of the mobile object when the time from the determination of the power supply object to the next scheduled date and time of use of the mobile object is equal to or greater than a first predetermined time and the charge amount of the battery is equal to or greater than a first predetermined amount.

[0008] In the above-mentioned power supply management system, the power supply object determination unit may be configured to determine, based on the object attribute information, as the power supply object, one of the plurality of objects that is recognized as not being used by the user of the mobile object when the time from the determination of the power supply object to the next scheduled date and time of use of the mobile object is equal to or longer than the first predetermined time and the charge amount of the battery is equal to or longer than a second predetermined amount that is greater than the first predetermined amount.

[0009] In the above power supply system, the power supply object determination unit may be configured to, when the time from the determination of the power supply object to the next scheduled date and time of use of the mobile body is equal to or longer than a second predetermined time and the charge amount of the battery is equal to or greater than a third predetermined amount, determine, based on the object attribute information, as the power supply object an object among the plurality of objects that is recognized to be located at a point that is a predetermined distance or less from the charging / discharging device, in priority to an object that is located at a point that is more than the predetermined distance from the charging / discharging device.

[0010] In the above-mentioned power supply system, the power supply object determination unit may be configured to prohibit power supply from the battery to the object via the charging / discharging device if the time from the time of determination of the power supply object to the next scheduled date and time of use of the mobile object is less than a predetermined lower limit time.

[0011] In the above power supply system, the power supply object determination unit may be configured to charge the battery with power supplied from a power grid to the charging / discharging device when the charge amount of the battery is less than a predetermined lower limit charge amount.

[0012] A second aspect for achieving the above object is a power supply management method executed by a computer, the power supply management method including: a charge amount recognition step for recognizing the charge amount of a battery mounted on a mobile body; and a power supply object determination step for determining, when the mobile body is in a state where the battery can supply power to a charging / discharging device, a power supply object to which power is to be supplied from the battery via the charging / discharging device, based on the charge amount of the battery and the current time. [Effects of the Invention]

[0013] According to the power supply management system of the present disclosure, it is possible to increase the willingness of users of mobile objects equipped with batteries, such as EVs, to participate in VPPs. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a block diagram illustrating an aspect of a power supply management system according to an embodiment of the present invention. [Figure 2] 1 is a first flowchart showing processing in a power supply management system. [Figure 3] 10 is a second flowchart showing the processing in the power supply management system. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0016] [1. Configuration of the power management system] 1 is a block diagram showing an electricity supply and demand configuration 200 including an electricity supply management system 1 according to this embodiment. The electricity supply and demand configuration 200 includes a power plant 39 that supplies electricity, an electricity grid 100, an EV (mobile object) 5 (described later), home equipment A of a user of the EV 5, an object B to be supplied with electricity that exists in an area B close to A, and an object C to be supplied with electricity that exists in an area C far from A. The EV 5 may be a so-called automobile or a saddle-type vehicle. The power supply management system 1 performs charge and discharge management for the battery 32 of the EV 5 used by the user U. By this charge and discharge management, the power supply management system 1 32 acts as a VPP, 32 The power supply is supplied to the electrical appliances in the house A and other facilities via the power grid 100.

[0017] The smart meter 35 is connected to the electricity retail system 37 and the electricity supply management system 1 by wireless communication via the communication network N. Of course, the connection to the communication network N may be made by wired communication.

[0018] The power supply management system 1 is a server, and more specifically, a computer system having a processor 10 such as a CPU (Central Processing Unit). The power supply management system 1 includes the processor 10 that performs various calculations, a storage device 20 that stores programs and the like, and a communication unit 30 that communicates with a communication network N. The power supply management system 1 controls the power supply by the VPP for the battery 32 installed in the EV 5. The following describes a case where the charging and discharging of power by the VPP is controlled for the EV 5 and the like. The power supply management system 1 also controls the battery 32 of another EV, for example, an EV used by a VPP participant (VPP usage contractor) B near the home of the user U, in a similar manner.

[0019] The storage device 20 includes storage media such as a ROM (Read Only Memory) in which a program is written, a RAM (Random Access Memory) for temporary data storage, an HDD (Hard Disk Drive), or an SSD (Solid State Drive), and includes a control program storage area 21 for storing a control program, an object data storage area 22 for storing data related to an object to be powered, and a predetermined amount storage area 23 for storing thresholds for various controls, etc. The processor 10 executes the control program using the data stored in the storage device 20 to realize various functions.

[0020] Processor 10 is a battery mounted on the EV5. 32 Specifically, the smart meter 35 acquires information from the ECU 7 that controls the battery 32 of the EV 5, and the power supply management system 1 recognizes the charge amount of the battery 32 via the communication network N and the communication unit 30.

[0021] The battery 32 of the EV 5 is virtually divided into a first area 31, which is a user area where the user U can decide to charge or discharge, and a second area 33, which is an area that corresponds to power supply by the VPP.

[0022] The processor 10 realizes the function of the power supply object determination unit 13 that compares various predetermined amounts stored in the predetermined amount storage area 23 with a measured amount, such as a charge amount, acquired and recognized by the processor 10. The power supply object determination unit 13 determines a power supply object, which is an object to which power is supplied from the battery 32 via the charge / discharge device 9.

[0023] Processor 10 also realizes the function of planned use date and time recognition unit 12, which recognizes the next planned use date and time of EV 5. Planned use date and time recognition unit 12 has a function to determine whether the planned use date and time is included in a predetermined period stored in predetermined amount storage area 23. Planned use date and time recognition unit 12 also has a function to obtain the period from the current time (the time when the process for determining the power supply object is performed) to the next planned use date and time. The processor 10 also realizes the function of an object attribute information recognition unit 14 that acquires object attribute information indicating the attributes of multiple objects to which power can be supplied from the battery 32 via the charging / discharging device 9. Here, the object attribute information includes information on the user of the object (owner, renter, etc.) and information on the distance from the charging / discharging device 9 to the object (wheeling fee information). In this specification, wheeling fee refers to the fee set by a general electricity transmission and distribution company as a usage fee for the electricity transmission and distribution network used by retail electricity companies when transmitting electricity.

[0024] The communication unit 30 has an interface circuit that connects the power supply management system 1 and the communication network N.

[0025] Instead of or in addition to the processor 10 and storage device 20 of the power supply management system 1, all or part of the power supply management system 1 can be configured using hardware each including one or more electronic circuit components.

[0026] The EV 5 includes a battery 32 that stores power. The battery 32 virtually includes a first area 31 in which the user of the EV 5 can decide how the power will be used, and a second area 33 in which the user cannot decide how the power will be used. The power supply management system 1 may control charging and discharging in the first area 31 and the second area 33. The battery 32 is connected to a charging / discharging device 9 via a connection cable, and the charging / discharging device 9 is connected to the power grid 100 and the electrical wiring of the house A via a smart meter 35. While the present embodiment illustrates a configuration in which the battery 32 is virtually divided into the first area and the second area, such a virtual division may not be performed.

[0027] In Figure 1, in addition to user U, who is the user of EV 5, the battery of an EV located in area B near house A, which is user U's home, is also used as a VPP. Furthermore, the EVs in area B and equipment located in area C, which is far from user U's home equipment A, are also targets for power supply by the VPP.

[0028] [2. Processing by the power management system] FIG. 2 is a flowchart illustrating the process in the power supply management system 1. Consider a situation in which an EV 5 is connected to a charging / discharging device 9 via a connection cable. The charge amount recognition unit 11 receives SOC data from the EV 5 and recognizes the charge amount of the battery 32 (step S1). The planned use date and time recognition unit 12 recognizes the next planned date and time of the EV 5 by the user U (step S2). Specifically, for example, a schedule app on the user U's smartphone 70 and a TCU (Telematics Control Unit) (not shown) of the EV 5 cooperate to enable the planned use date and time recognition unit 12 to recognize the next planned date and time of the EV 5 through the smart meter 35. Next, the power supply object determination unit 13 determines whether the time until the planned use date and time is shorter than a first predetermined time RT_L (step S3). If the time until the planned use date and time is equal to or longer than the first predetermined time RT_L (step S3: NO), the power supply object determination unit 13 determines whether the charge amount in the second region 33 of the battery 32 is less than a lower limit charge amount CR_L (step S4). If the charge amount in the second region 33 of the battery 32 is equal to or greater than the lower limit charge amount CR_L (step S4: NO), the power supply object determination unit 13 determines whether the charge amount in the second region 33 of the battery 32 is equal to or greater than a second predetermined amount (step S5). If the charge amount in the second region 33 is equal to or greater than the second predetermined amount (step S5: YES), the object attribute information recognition unit 14 refers to the object data and determines the home facility A of the user U and objects other than the home facility A as power supply objects. Here, for objects other than the home facility A, the power supply object determination unit 13 preferentially selects objects that are closer to the charging / discharging device 9 as power supply objects (step S6).

[0029] Specifically, in order to take into account the power line usage fee, the power supply object determination unit 13 determines the power supply object by recognizing information about the distance from user U's charging / discharging device 9 to the power supply object of another VPP participant and the wheeling fee using the object attribute information recognition unit 13. For example, when comparing the distances from the charging / discharging device 9, the wheeling fee required to supply power to VPP participant B near user U's home facility A is lower than the wheeling fee required to supply power to VPP participant C located farther away from user U's home facility A. Therefore, it is desirable for the power supply object determination unit 13 to determine the power supply to VPP participant B near user U's home facility A. The power supply object determination unit 13 may prioritize the power supply objects, giving user U's EV 5 or user U's home facility A the highest priority, and may determine the priority of power supply among the power supply objects based on the information acquired by the object attribute information recognition unit 14.

[0030] The power supply object determination unit 13 sets power supply from the battery 32 to the home equipment A of the user U and power supply objects other than the home equipment A. Also, taking into consideration fluctuations in the power purchase price depending on the time of day, the unit determines the timing of power supply to the power supply objects (step S7).

[0031] If the time until the scheduled use date and time is less than the first predetermined time RT_L (step S3: YES), the power supply object determination unit 13 sets a virtual charge transfer from the second area 33 to the first area 31 of the battery 32 (proceed to A in FIG. 3 and execute step T1). The power supply object determination unit 13 determines whether the charge amount in the first area 31 of the battery 32 is insufficient (step T2). Specifically, the power supply object determination unit 13 compares the charge amount in the first area 31 with the fourth predetermined amount stored in the predetermined amount storage area 23. If the charge amount in the first area 31 of the battery 32 is not insufficient (step T2: NO), the process returns to C in FIG. 1 and ends. If the charge amount in the first area 31 of the battery 32 is insufficient (step T2: YES), the power supply object determination unit 13 sets a charge of the battery 32 using purchased power from the power grid 100 (step T3), and the process returns to C in FIG. 2 and ends.

[0032] 2, if the charge amount of the second region 33 is less than the second predetermined amount (step S5: NO), the power supply object determination unit 13 determines whether the charge amount of the second region 33 of the battery 32 is equal to or greater than the first predetermined amount CR1 (step S8). If the charge amount of the second region 33 of the battery 32 is equal to or greater than the first predetermined amount CR1 (step S8: YES), the power supply object determination unit 13 refers to the object data in the object data storage area 22 and determines the home facility A of the user U as the object to be supplied with power (step S9). Then, the power supply object determination unit 13 sets power supply from the battery 32 to the home facility A of the user U and determines the timing of the power supply taking into account fluctuations in the power purchase price depending on the time of day (step S10).

[0033] If the charge amount in the second region 33 of the battery 32 is less than the first predetermined amount CR1 (step S8: NO), the process moves to B in Fig. 3, where the power supply object determination unit 13 sets the battery to be charged with power purchased from the power grid 100 during a time period when the power purchase price is low. Furthermore, the power supply object determination unit 13 charges the first region 31 up to the minimum charge amount set by the user U. Here, the power supply object determination unit 13 sets the second region 33 to be fully charged (step U1).

[0034] Here, the relationship between the lower limit charge amount CR_L, the first predetermined amount CR1, and the second predetermined amount CR2 is as follows: <CR1<CR2である。

[0035] 3. Other Embodiments As a modified example of the above embodiment, for example, when the time from the time of determining the power supply object to the next scheduled date and time of use of EV5 is equal to or longer than a second predetermined time and the charge amount of battery 32 is equal to or greater than a third predetermined amount, power supply object determination unit 13 may determine, based on the object attribute information acquired by object attribute information recognition unit 14, an object that is recognized to be located at a point that is a predetermined distance or less from charging / discharging device 9 as the power supply object, in preference to objects that are located at a point that is greater than the predetermined distance from charging / discharging device 9.

[0036] In another modified embodiment, the power supply object determination unit 13 may prohibit the supply of power from the battery 32 to other power supply objects via the charging / discharging device 9 if the time from the time the power supply object is determined to the next scheduled date and time of use of the EV 5 is less than a predetermined lower limit time.

[0037] 4. Configurations supported by the above embodiments (Configuration 1) A power supply management system comprising a charge amount recognition unit that recognizes the charge amount of a battery mounted on a mobile body, and when the mobile body is in a state where the battery can supply power to a charging / discharging device, determines a power supply target to which power will be supplied from the battery based on the charge amount of the battery and the current time. This configuration will increase the willingness of users of battery-powered vehicles such as EVs to participate in VPPs, thereby ensuring that more people have access to affordable, reliable, sustainable, and advanced energy.

[0038] (Configuration 2) A power supply management system according to Configuration 1, comprising: a planned use date and time recognition unit that recognizes the next planned date and time of use of the mobile body; an object attribute information recognition unit that acquires object attribute information indicating attributes of multiple objects to which power can be supplied from the battery via a charging / discharging device; and a power supply object determination unit that, when the mobile body is in a state where power can be supplied from the battery to the charging / discharging device, determines from the multiple objects a power supply object to be supplied with power from the battery via the charging / discharging device based on the charge amount of the battery, the current time, the next planned date and time of use of the mobile body, and the object attribute information. The power supply management system of configuration 2 can determine the power supply object to which power is to be supplied from the battery via a charging / discharging device by taking into consideration the next scheduled date and time of use of the mobile object, the margin of power supply from the battery to the object that can be estimated based on the battery's charge level, and the attributes of the object. This can ease the resistance of mobile object users to using their mobile object's battery in a VPP and increase the willingness of mobile object users to participate in the VPP.

[0039] (Configuration 3) The power supply management system described in Configuration 2, wherein the power supply object determination unit determines, based on the object attribute information, one of the plurality of objects that is recognized as an object used by a user of the mobile body as the power supply object when the time from the determination of the power supply object to the next scheduled date and time of use of the mobile body is equal to or greater than a first predetermined time and the charge amount of the battery is equal to or greater than a first predetermined amount. According to the power supply management system of configuration 3, when there is a surplus of power to be taken from the battery for the user's planned use of the mobile object, the object used by the user of the mobile object is determined as the object to be powered. This makes it possible to proactively supply power from the battery to the object used by the user for which it is assumed that the user will have little resistance to taking power from the battery.

[0040] (Configuration 4) The power supply management system described in Configuration 3, wherein the power supply object determination unit determines, based on the object attribute information, as the power supply object, an object among the plurality of objects that is recognized as not being used by the user of the mobile object when the time from the determination of the power supply object to the next scheduled date and time of use of the mobile object is equal to or longer than the first predetermined time and the charge amount of the battery is equal to or longer than a second predetermined amount that is greater than the first predetermined amount. According to the power supply management system of configuration 4, when there is a surplus of power to be taken out from the battery for the user's planned use of the mobile object, an object other than the object being used by the user is determined as an object to be powered. This makes it possible to supply power from the battery to an object other than the object being used by the user only when there is a sufficient surplus of power to be taken out from the battery.

[0041] (Configuration 5) The power supply management system according to Configuration 2, wherein the power supply object determination unit, when the time from the determination of the power supply object to the next scheduled date and time of use of the mobile body is equal to or longer than a second predetermined time and the charge amount of the battery is equal to or greater than a third predetermined amount, determines, based on the object attribute information, as the power supply object, an object among the plurality of objects that is recognized to be located at a point that is a predetermined distance or less from the charging / discharging device, in priority to an object that is located at a point that is a distance from the charging / discharging device that is greater than the predetermined distance. According to the power supply management system of configuration 5, an object that is close to the charging / discharging device and is expected to have a small wheeling charge required for power supply can be preferentially determined as an object to be supplied with power.

[0042] (Configuration 6) A power supply management system according to any one of configurations 2 to 5, wherein the power supply object determination unit prohibits power supply from the battery to the power supply object via the charging / discharging device when the time from the determination of the power supply object to the next scheduled date and time of use of the mobile body is less than a predetermined lower limit time. According to the power supply management system of configuration 6, when there is little time left until the next scheduled date and time of use of the mobile object, it is possible to prohibit the battery from supplying power to the object via the charging / discharging device, thereby preventing any problems from occurring when the user next uses the mobile object.

[0043] (Configuration 7) A power supply management system according to any one of configurations 2 to 5, wherein the power supply object determination unit charges the battery with power supplied from a power grid to the charging / discharging device when the charge level of the battery is less than a predetermined lower limit charge level. According to the power supply management system of configuration 7, when the charge level of the battery falls below the lower limit charge level, the battery is charged, and the charge level of the battery can be maintained above a certain level.

[0044] (Configuration 8) A power supply management method executed by a computer, comprising: a charge amount recognition step of recognizing the charge amount of a battery mounted on a mobile body; and a power supply object determination step of determining, when the mobile body is in a state where the battery can supply power to a charging / discharging device, a power supply object to which power will be supplied from the battery via the charging / discharging device based on the charge amount of the battery and the current time. By executing the power supply management method of the eighth aspect by a computer, the same effects as those of the power supply management system of the first aspect can be obtained.

[0045] The power supply management system of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. [Explanation of symbols]

[0046] 1. Power supply management system 5 EV (mobile vehicle) 7 ECU 9 Charge / discharge device 10 processors 11 Charge amount recognition section 12 Planned use date and time recognition section 13 Power supply object determination unit 14 Object attribute information recognition unit 20 Storage device 21 Control program storage area 22 Object data storage area 23 Predetermined amount storage area 30 Communications Department 31 First area 32 Battery 33 Second area 35 Smart Meter 37 Electricity Retail System 39 Power Plant 70 Smartphones 100 power 200 Electricity supply and demand composition A. User U's home equipment B VPP participating area near user U's home equipment C. A VPP participating area located far from user U's home equipment N Communication Network

Claims

1. a charge amount recognition unit that recognizes the charge amount of a battery mounted on the mobile object; a power supply object determination unit that determines a power supply object to which power is to be supplied from the battery based on a charge amount of the battery and a current time when the mobile body is in a state where power can be supplied from the battery to a charging / discharging device; a scheduled use date and time recognition unit that recognizes the next scheduled use date and time of the moving object; an object attribute information recognition unit that acquires object attribute information indicating attributes of a plurality of objects to which power can be supplied from the battery via a charging / discharging device; the power supply object determination unit, when the mobile object is in a state in which power can be supplied from the battery to the charging / discharging device, determines, from among the plurality of objects, a power supply object to which power is to be supplied from the battery via the charging / discharging device, based on the amount of charge of the battery, the current time, the next scheduled date and time of use of the mobile object, and the object attribute information; When the time from the determination of the power supply object to the next scheduled date and time of use of the mobile body is equal to or longer than a second predetermined time and the charge amount of the battery is equal to or longer than a third predetermined amount, the power supply object determination unit determines, based on the object attribute information, as the power supply object, an object among the plurality of objects that is recognized to be located at a point that is a predetermined distance or less from the charging / discharging device, in preference to an object that is located at a point that is a distance from the charging / discharging device that is greater than the predetermined distance. A power supply management system characterized by:

2. When the time from the determination of the power supply object to the next scheduled date and time of use of the mobile object is equal to or longer than a first predetermined time and the charge amount of the battery is equal to or longer than a first predetermined amount, the power supply object determination unit determines, based on the object attribute information, one of the plurality of objects that is recognized as an object used by a user of the mobile object as the power supply object. The power supply management system according to claim 1 .

3. When the time from the determination of the power supply object to the next scheduled date and time of use of the mobile object is equal to or longer than the first predetermined time and the charge amount of the battery is equal to or longer than a second predetermined amount that is greater than the first predetermined amount, the power supply object determination unit determines, based on the object attribute information, one of the plurality of objects that is recognized as not being an object used by the user of the mobile object, as the power supply object. The power supply management system according to claim 2 .

4. The power supply object determination unit prohibits power supply from the battery to the power supply object via the charging / discharging device when the time from the determination of the power supply object to the next scheduled date and time of use of the mobile object is less than a predetermined lower limit time. The power supply management system according to any one of claims 1 to 3.

5. The power supply object determination unit charges the battery with power supplied from a power grid to the charging / discharging device when the charge amount of the battery is less than a predetermined lower limit charge amount. The power supply management system according to any one of claims 1 to 3.

6. 1. A computer-implemented method for managing a power supply, comprising: a charge amount recognition step of recognizing a charge amount of a battery mounted on the mobile object; a power supply object determination step of determining a power supply object to which power is to be supplied from the battery via the charging / discharging device based on the charge amount of the battery and the current time when the mobile body is in a state where power can be supplied from the battery to the charging / discharging device; a scheduled use date and time recognition step of recognizing a next scheduled use date and time of the mobile object; an object attribute information recognition step of acquiring object attribute information indicating attributes of a plurality of objects to which power can be supplied from the battery via the charging / discharging device, the power supply object determination step, when the mobile body is in a state where power can be supplied from the battery to the charging / discharging device, determines, from among the plurality of objects, a power supply object to which power is to be supplied from the battery via the charging / discharging device, based on the charge amount of the battery, the current time, the next scheduled date and time of use of the mobile body, and the object attribute information; In the power supply object determination step, when the time from the determination point of the power supply object to the next scheduled date and time of use of the mobile body is equal to or longer than a second predetermined time and the charge amount of the battery is equal to or longer than a third predetermined amount, based on the object attribute information, one of the plurality of objects that is recognized to be located at a point that is a predetermined distance or less from the charging / discharging device is determined as the power supply object, in preference to one that is located at a point that is a distance from the charging / discharging device that is greater than the predetermined distance. Power supply management method.

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