JP2020048246A - Charge management device - Google Patents

Abstract

To improve a user's convenience during a charging of one vehicle when an other vehicle is electrically connected to a charging facility.SOLUTION: A server 1 asks a user of a vehicle B whether or not to accept a first charging schedule in which a charging of a vehicle B is started after a charging of a vehicle A is completed when the vehicle B is electrically connected to a charging facility 2 during the charging of the vehicle A, and then sets one of second and third charging schedules when the user does not accept the first charging schedule. The second charging schedule is a schedule for starting the charging of the vehicle B by suspending the charging of the vehicle A. The third charging schedule is a schedule for charging both the vehicles A and B at the same time so that a total power of an electric power supplied from the charging facility 2 to the vehicle A and an electric power supplied from the charging facility 2 to the vehicle B does not exceed the maximum power Wmax.SELECTED DRAWING: Figure 7

Description

  The present disclosure relates to a charging management device, and more specifically, to a charging management device that manages a charging schedule in a charging facility that charges a vehicle equipped with a power storage device.

  2. Description of the Related Art In recent years, vehicles that can be charged with electric power supplied from a charging facility outside the vehicle (hereinafter, also referred to as external charging) have been developed. When a plurality of vehicles are connected to the charging facility, it is required to create and manage a charging schedule that defines how to charge the plurality of vehicles.

  For example, Japanese Unexamined Patent Application Publication No. 2006-59189 (Patent Document 1) discloses that when a plurality of vehicles are electrically connected to a charging facility, a predetermined charging permission condition (in Patent Literature 1, available power is limited to the charging facility). The vehicle is determined to satisfy the condition that the maximum output power of the vehicle does not exceed the maximum output power of the vehicle. It has been disclosed.

JP-A-2006-59189 JP 2012-249444 A

  With the spread of vehicles that can be externally charged, for example, in a home that has two vehicles, a situation may arise in which both vehicles become vehicles that can be externally charged. If one of the two vehicles is being charged while the other vehicle is electrically connected to the charging facility, a charging schedule may be created so that the two vehicles are charged simultaneously. However, if two vehicles are charged simultaneously as in the case where two vehicles are separately charged, the charging power of the two vehicles is the maximum power that can be supplied from the charging facility (for example, the power at which a home breaker operates). May be exceeded.

  In view of such circumstances, when one vehicle is electrically connected to the charging facility while the other vehicle is being charged, the power supplied from the charging facility may exceed the maximum power that can be supplied from the charging facility. In some cases, it is desirable for the user to be able to determine how to charge the two vehicles by a simple operation while preventing the power supplied from the charging facility from exceeding the maximum power.

  The present disclosure has been made in order to solve the above-described problems, and an object of the present disclosure is to provide a charging management apparatus that, when one vehicle is electrically connected to the charging facility while the other vehicle is being charged, the charging facility. Charging that does not exceed the maximum power supplied from the user by a method that is highly convenient for the user.

  A charge management device according to an aspect of the present disclosure manages a charge schedule in a charging facility configured to be able to charge first and second vehicles each having a power storage device mounted thereon. When charging the first and second vehicles separately, the charging facility charges the total power of the power supplied from the charging facility to the first vehicle and the power supplied from the charging facility to the second vehicle. It is configured to exceed the maximum power that can be supplied from the equipment. When the second vehicle is electrically connected to the charging facility while the first vehicle is being charged, the charge management device starts charging the second vehicle after the first vehicle is completely charged. The user of the second vehicle is inquired about whether or not to accept the charging schedule. When the user does not accept the first charging schedule, one of the second and third charging schedules is set. The second charging schedule is a schedule in which charging of the first vehicle is interrupted and charging of the second vehicle is started. The third charging schedule is configured so that the total power of the power supplied from the charging facility to the first vehicle and the power supplied from the charging facility to the second vehicle does not exceed the maximum power. Is a schedule for charging both vehicles at the same time.

  In the second charging schedule, the charging of the first vehicle is interrupted, so that the power supplied from the charging facility does not exceed the maximum power. On the other hand, in the third charging schedule, although both the first and second vehicles are charged at the same time, compared to the case where the first and second vehicles are separately charged, the charging equipment switches to the first vehicle. Since the supplied power and the power supplied from the charging facility to the second vehicle are suppressed, the power supplied from the charging facility does not exceed the maximum power. Further, first, the first charging schedule is presented to the user, and a second or third charging schedule is set as an alternative when the user does not accept the first charging schedule. Therefore, the user does not have to select any of the many charging schedule options or set a desired charging schedule from scratch, which is convenient for the user. Therefore, according to the above configuration, it is possible to realize charging such that the power supplied from the charging facility does not exceed the maximum power by a method with high user convenience.

  According to the present disclosure, when one vehicle is electrically connected to the charging facility while the other vehicle is being charged, charging such that the power supplied from the charging facility does not exceed the maximum power is convenient for the user. It can be realized by a high technique.

FIG. 1 is a diagram schematically illustrating an overall configuration of a charging system according to the present embodiment. FIG. 2 is a diagram for describing the configuration shown in FIG. 1 in more detail. It is a figure for explaining a charging schedule which charges two vehicles at the same time. FIG. 3 is a diagram illustrating an example of a first charging schedule. It is a figure showing an example of the 2nd charge schedule. It is a figure showing an example of the 3rd charge schedule. 5 is a flowchart illustrating an example of a charging schedule management process according to the present embodiment. 9 is a flowchart illustrating another example of the charging schedule management process in the present embodiment. 13 is a flowchart illustrating still another example of the charging schedule management process in the present embodiment.

  Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding portions have the same reference characters allotted, and description thereof will not be repeated.

[Embodiment]
<Overall configuration>
FIG. 1 is a diagram schematically showing an overall configuration of a charging system according to the present embodiment. Referring to FIG. 1, in the present embodiment, each of vehicles A and B is a vehicle configured to be able to be externally charged, and specifically is a plug-in hybrid vehicle, an electric vehicle, or a fuel cell vehicle. . The number of vehicles is not limited to two as long as it is plural, and may be three or more. Vehicles A and B are vehicles of a certain user, not shown. This user holds the smartphone C.

  The charging system 100 includes a server 1, a charging facility 2, and a system power supply 3. The server 1 is a microcomputer including a CPU (Central Processing Unit) and a memory (not shown), and manages a charging schedule for charging the vehicles A and B by the charging facility 2. Vehicles A and B are electrically connected to charging facility 2 by charging cable 4. The charging equipment 2 is, for example, a charging equipment installed in the home of the user, and supplies electric power from a system power supply (external power supply) 3 such as a commercial power supply to the vehicles A and B. Note that the server 1 corresponds to a “charging management device” according to the present disclosure.

  FIG. 2 is a diagram for describing the configuration shown in FIG. 1 in more detail. Since the configurations of the vehicles A and B are equivalent, the configuration of the vehicle A and the control related to the vehicle A will be representatively described below.

  The vehicle A includes an inlet 51, a power conversion device 52, a battery 53, a monitoring unit 54, and an electronic control unit (ECU: Electronic Control Unit) 55.

  The inlet 51 is configured such that a plug (not shown) of the charging cable 4 is connected thereto. By connecting the plug to the inlet 51, the vehicle A and the charging facility 2 are electrically connected, and it becomes possible to supply AC power from the charging facility 2 to the vehicle A.

  Power conversion device 52 includes, for example, a rectifier circuit that converts AC power from charging facility 2 into DC power, and a converter (both not shown) that boosts or drops DC power converted by the rectifier circuit. Be composed. The power stepped up or down to the desired voltage by the power converter 52 is supplied to the battery 53.

  The battery 53 is a power storage device configured to be chargeable and dischargeable. The battery 53 includes a secondary battery such as a lithium ion secondary battery or a nickel hydride battery. However, instead of the battery 53, a capacitor such as an electric double layer capacitor may be employed.

  Monitoring unit 54 includes a voltage sensor and a current sensor (neither is shown). Monitoring unit 54 detects voltage VB of battery 53 and current IB input / output to / from battery 53, and outputs the detection result to ECU 55.

  The ECU 55 has a built-in CPU and a memory (both not shown), and based on information stored in the memory or information from each sensor (not shown), the power conversion device 52 and each device (motor not shown). Drive inverter).

  The charging facility 2 includes a control unit 21, a storage unit 22, an operation display unit 23, and a communication unit 24.

  The control unit 21 is a microcomputer including a CPU and a memory (both not shown), and controls the vehicle A (the battery 53 mounted on the vehicle A) using electric power supplied from the system power supply 3 (see FIG. 1). Perform external charging. More specifically, the control unit 21 controls opening / closing of the relay 41 included in the charging cable 4, and transmits various kinds of information regarding external charging with the ECU 55 of the vehicle A via a communication line ( (Not shown).

  The storage unit 22 is, for example, a non-volatile memory, and stores information indicating the charging schedule of the vehicle A received by the charging facility 2 from the server 1.

  The operation display unit 23 includes, for example, a display with a touch panel. The operation display unit 23 displays and presents the charging schedule of the vehicle A to the user, and receives various operations by the user for setting the charging schedule of the vehicle A. Note that, instead of the operation display unit 23, the operation unit and the display unit may be separately configured.

  The communication unit 24 is configured to perform two-way communication between the server 1 and the charging facility 2. The operation content of the operation display unit 23 by the user is transmitted to the server 1 via the communication unit 24. Further, the charging schedule set by the server 1 is transmitted to the charging facility 2 via the communication unit 24 and stored in the storage unit 22.

  Similar to the operation display unit 23, the user's smartphone C displays and presents the charging schedule of the vehicle A to the user, and receives a user operation for setting the charging schedule of the vehicle A.

<Charging schedule management>
In the charging system configured as described above, the server 1 is required to appropriately create and manage charging schedules for the two vehicles A and B. When one vehicle A of the two vehicles is electrically connected to the charging facility 2 by the charging cable 4 while the other vehicle B is being charged, the server 1 executes the two vehicles B as described below. It is also conceivable to create a charging schedule for charging vehicles A and B at the same time.

  FIG. 3 is a diagram for explaining a charging schedule for charging two vehicles A and B at the same time. In FIG. 3 and FIGS. 4 to 6 described later, the horizontal axis represents the elapsed time. The time (current time) when the vehicle B is electrically connected to the charging facility 2 by the charging cable 4 while the vehicle A is being charged is defined as time 0. The vertical axis represents the power supplied from the charging facility 2 to the vehicles A and B (one or both of them). The electric power that can be supplied from charging facility 2 has an upper limit based on, for example, a contract current (current value at which the breaker operates) between the user (at home) and the power company. This upper limit power is described as the maximum power Wmax.

  As shown in FIG. 3, when vehicles A and B are simultaneously charged in the same manner as when two vehicles A and B are separately charged, electric power supplied to vehicle A from charging facility 2 and vehicle B from charging facility 2 May exceed the maximum power Wmax. Therefore, when the vehicle B is electrically connected to the charging facility 2 while the vehicle A is being charged, how the vehicles A and B are charged is determined by the power supplied from the charging facility 2 being equal to the maximum power Wmax. It is desirable for the user to be able to determine with a simple operation while preventing the overrun.

  Therefore, the server 1 according to the present embodiment executes a “charging schedule management process” as described below. In the charging schedule management process according to the present embodiment, first, the first charging schedule is presented to the user, and depending on the operation of the user, at least one of the second and third charging schedules is further presented to the user. Is done. Hereinafter, each charging schedule will be described in order. In the example described below, the vehicle A corresponds to the “first vehicle” according to the present disclosure, and the vehicle B corresponds to the “second vehicle” according to the present disclosure.

  FIG. 4 is a diagram illustrating an example of the first charging schedule. The first charging schedule is a charging schedule that gives priority to continuing charging of the vehicle A rather than starting charging of the vehicle B newly. In the example shown in FIG. 4, vehicle A is charged during a period from time 0 to time t1. When the charging of the vehicle A is completed at the time t1, the charging of the vehicle B is performed until the time t2.

  When vehicle B is electrically connected to charging facility 2 by charging cable 4 while vehicle A is being charged, server 1 first presents a first charging schedule to the user and inquires whether or not to accept the first charging schedule. . When the user accepts the first charging schedule, vehicles A and B are charged according to the first charging schedule. On the other hand, when the user does not accept the first charging schedule, the server 1 presents at least one of the second and third charging schedules to the user as an alternative to the first charging schedule.

  FIG. 5 is a diagram illustrating an example of the second charging schedule. Referring to FIG. 5, the second charging schedule is a charging schedule that gives priority to starting charging of vehicle B over continuing charging of vehicle A. More specifically, when the user does not accept the first charging schedule, charging of vehicle A is interrupted at time 0, and charging of vehicle B is started instead of charging of vehicle A. When the charging of the vehicle B is completed at the time t3, the charging of the vehicle A, which has been suspended, is restarted, and the charging of the vehicle A is performed during a period from the time t3 to the time t4.

  FIG. 6 is a diagram illustrating an example of the third charging schedule. As can be seen by comparing FIG. 6 with FIG. 3, the power supplied from charging facility 2 to vehicle A in the third charging schedule is the same as the power supplied from charging facility 2 to vehicle A when vehicles A and B are separately charged. It is set smaller than the power. Similarly, the power supplied from charging facility 2 to vehicle B in the third charging schedule is set smaller than the power supplied from charging facility 2 to vehicle B when vehicles A and B are separately charged. Thus, during the period from time 0 to time t5, the vehicle is controlled so that the total power of the power supplied from charging facility 2 to vehicle A and the power supplied from charging facility 2 to vehicle B does not exceed maximum power Wmax. Both A and B are charged simultaneously. The power supplied from charging facility 2 to vehicle A may be equal to the power supplied from charging facility 2 to vehicle B. In the example shown in FIG. 6, charging of vehicle A is completed at time t5, and charging of vehicle B is performed independently during a period from time t5 to time t6.

  As described above, in the second charging schedule (see FIG. 5), charging of vehicle A is interrupted, and only charging of vehicle B is performed, so that the power supplied from charging facility 2 is prevented from exceeding maximum power Wmax. Is done. On the other hand, in the third charging schedule (see FIG. 6), although both vehicles A and B are charged at the same time, compared to the case where vehicles A and B are charged separately (see FIG. 3), charging facility 2 makes a difference. Since both the power supplied to the vehicle A and the power supplied from the charging facility 2 to the vehicle B are set to be small, the power supplied from the charging facility 2 (total power) is prevented from exceeding the maximum power Wmax. .

  Further, the user is first presented with a first charging schedule and, as an alternative to the first charging schedule, when the user does not accept the first charging schedule, the second and third charging schedules One or both are presented. Therefore, the user does not have to select any charging schedule from among a large number (three in this example) of charging schedule options, and the charging schedule is sequentially proposed from the server 1, so that the user cannot make a determination. Easy. In addition, the user does not need to manually set a desired charging schedule, and the user operation is simplified. Thus, according to the present embodiment, charging of vehicles A and B such that the power supplied from charging facility 2 does not exceed maximum power Wmax can be realized by a method that is highly convenient for the user.

<Processing flow>
In the present embodiment, any one of the charging schedule management processes shown in the flowcharts of FIGS. 7 to 9 below is executed.

  FIG. 7 is a flowchart illustrating an example (first example) of the charging schedule management process according to the present embodiment. The flowcharts shown in FIG. 7 and FIGS. 8 and 9 to be described later show a main routine (not shown) at a predetermined cycle, for example, during charging of the first vehicle (vehicle A in the example of FIGS. 4 to 6). Called from and executed. Each step (hereinafter, abbreviated as “S”) included in these flowcharts is basically realized by software processing by the server 1, and a part (or all) of the hardware ( (Electronic circuit).

  Referring to FIG. 7, in S101, server 1 determines whether or not a second vehicle (vehicle B in the example of FIGS. 4 to 6) is electrically connected to charging facility 2 by charging cable 4. I do. When the charging facility 2 detects that the vehicle B is electrically connected to the charging facility 2 through communication via the charging cable 4, the charging facility 2 transmits information indicating the fact to the server 1. The server 1 can determine whether or not the vehicle B is electrically connected to the charging facility 2 based on whether or not this information is received.

  If the second vehicle (vehicle B) is not electrically connected to charging facility 2 (NO in S101), the subsequent processing is skipped, and the processing returns to the main routine. In this case, charging of the first vehicle (vehicle A) is continued. On the other hand, when vehicle B is electrically connected to charging facility 2 (YES in S101), server 1 advances the processing to S102.

  In S102, the server 1 acquires the charging schedule of each of the vehicles A and B (the charging schedule when the vehicles A and B do not consider each other's existence). Describing in more detail, the charging schedule of the vehicle A already being charged is known to the server 1. Based on the SOC (State Of Charge) of battery 53 of vehicle B, server 1 determines the charging time required for the current SOC of battery 53 to recover to an SOC indicating a fully charged state (eg, SOC = 100%). calculate. Then, the server 1 creates a charging schedule for the vehicle B according to the calculation result of the charging time.

  In S103, the server 1 determines whether the total power of the power supplied from the charging facility 2 to the vehicle A and the power supplied from the charging facility 2 to the vehicle B exceeds the maximum power Wmax. For example, since information on a contract current (a current value at which a breaker operates) between a user's home and a power company is registered in the server 1 in advance, the value of the maximum power Wmax corresponding to the contract current is known to the server 1. It is. Therefore, as shown in FIG. 3, server 1 supplies electric power from charging facility 2 (total electric power supplied to two vehicles A and B) and maximum electric power when vehicles A and B are separately charged. By comparing with Wmax, it can be determined whether or not the total power exceeds the maximum power Wmax.

  If the total power is lower than the maximum power Wmax (NO in S103), server 1 returns the process to the main routine. In this case, although not shown, charging of the vehicle A is continued as it is according to the charging schedule of the vehicle A, and charging of the vehicle B is performed according to the charging schedule of the vehicle B.

  On the other hand, when the total power exceeds the maximum power Wmax (YES in S103), server 1 advances the process to S104, and presents to the user a first charging schedule (see FIG. 4) that gives priority to continuing charging of vehicle A. I do. Specifically, the server 1 displays the first charging schedule on the operation display unit 23 of the charging facility 2 or displays the first charging schedule on the smartphone C of the user, thereby allowing the user to perform the first charging schedule. Inquires whether to accept the charging schedule. The user responds to the above inquiry by operating (the operation display unit 23 of) the charging facility 2 or the smartphone C. The server 1 acquires information indicating the user's answer from the charging facility 2 or the smartphone C.

  If the user has performed an operation to accept the first charging schedule (YES in S105), server 1 sets the first charging schedule as a charging schedule for charging vehicles A and B (S106). . Information indicating the first charging schedule is transmitted from server 1 to charging facility 2. Thereafter, the charging facility 2 executes charging of the vehicles A and B according to the first charging schedule (not shown).

  In contrast, when the user performs an operation not to accept the first charging schedule (NO in S105), server 1 presents the second charging schedule to the user (S107). Then, the server 1 sets a second charging schedule as a charging schedule for charging the vehicles A and B (S108). Information indicating the second charging schedule is transmitted from the server 1 to the charging facility 2, and the charging facility 2 executes charging of the vehicles A and B according to the second charging schedule.

  In the example illustrated in FIG. 7, it has been described that the second charging schedule is presented to the user when the user performs an operation not to accept the first charging schedule (NO in S105) (S107). However, a third charging schedule may be presented to the user instead of the second charging schedule. The flowchart in this case is basically the same as the flowchart shown in FIG. 7, and thus detailed description will not be repeated.

  FIG. 8 is a flowchart illustrating another example (second example) of the charging schedule management process according to the present embodiment. The processing of S201 to S206 is the same as the processing of S101 to S106 shown in FIG. 7, respectively, and therefore, description thereof will not be repeated.

  Referring to FIG. 8, when the user performs an operation not to accept the first charging schedule (NO in S205), server 1 presents both the second and third charging schedules to the user, The user is caused to select one of them (S207). Then, the server 1 acquires, from the charging facility 2 or the smartphone C, information indicating which of the second and third charging schedules the user has selected.

  When the user performs an operation of selecting the second charging schedule (YES in S208), server 1 sets a second charging schedule as a charging schedule for charging vehicles A and B (S209). The server 1 transmits information indicating the second charging schedule to the charging facility 2. Thereby, the charging facility 2 executes charging of the vehicles A and B according to the second charging schedule.

  On the other hand, when the user performs an operation of selecting the third charging schedule (NO in S208), server 1 sets the third charging schedule (S210). The server 1 transmits information indicating the third charging schedule to the charging facility 2. Thus, charging facility 2 executes charging of vehicles A and B according to the third charging schedule.

  As described above, when the user does not accept the first charging schedule, the server 1 presents both the second charging schedule and the third charging schedule to the user, and prompts the user to select one of them. You may.

  FIG. 9 is a flowchart illustrating still another example (third example) of the charging schedule management process according to the present embodiment. The processing of S301 to S306 is the same as the processing of S101 to S106 shown in FIG. 7, respectively, and thus the description will not be repeated.

  Referring to FIG. 9, when the user performs an operation not to accept the first charging schedule (NO in S305), server 1 presents the second charging schedule to the user (S307). Then, the server 1 acquires, from the charging facility 2 or the smartphone C, information indicating whether or not the user accepts the second charging schedule.

  If the user has performed an operation to accept the second charging schedule (YES in S308), server 1 sets the second charging schedule as a charging schedule for charging vehicles A and B (S309). . Then, information indicating the second charging schedule is transmitted from server 1 to charging facility 2. Thereby, the charging facility 2 executes charging of the vehicles A and B according to the second charging schedule.

  On the other hand, when the user performs an operation not to accept the second charging schedule (NO in S308), server 1 presents the third charging schedule to the user (S310), and sets the third charging schedule. (S311). The information indicating the third charging schedule is transmitted from the server 1 to the charging facility 2, and the charging of the vehicles A and B according to the third charging schedule is performed by the charging facility 2.

  As described above, the server 1 may present the user with the first charging schedule, the second charging schedule, and the third charging schedule in this order, and may inquire which charging schedule the user selects. However, the order of presentation to the user is not limited to this, and the user may be presented in the order of the first charging schedule, the third charging schedule, and the second charging schedule.

  As described above, according to the present embodiment, in the second charging schedule, charging of vehicle B is performed with priority, and charging of vehicle A is interrupted (held). The power (total power) is prevented from exceeding the maximum power Wmax. In the third charging schedule, both the vehicles A and B are charged at the same time, but compared with the case where the vehicles A and B are separately charged (see FIG. 3), the power supplied from the charging facility 2 to the vehicle A is smaller. By setting the power supplied from the charging facility 2 to the vehicle B to be small, the power supplied from the charging facility 2 is prevented from exceeding the maximum power Wmax.

  Further, the first charging schedule is first presented to the user, and at least one of the second and third charging schedules is presented when the user does not accept the first charging schedule. In this way, by sequentially proposing charging schedules from the server 1 to the user, the user's judgment is easier than in the case where all charging schedules are presented to the user from the beginning. In addition, since the user does not need to manually operate the operation display unit 23 or the smartphone C to set a desired charging schedule, the user operation is simple. Therefore, according to the present embodiment, it is possible to realize charging such that the power supplied from charging facility 2 does not exceed maximum power Wmax by a method with high user convenience.

  In the present embodiment, an example in which the charging schedule is set by the server 1 installed outside the charging facility 2, that is, an example in which the “charging management device” according to the present disclosure is the server 1 has been described. However, the “charging management device” according to the present disclosure may be installed inside the charging facility 2.

  The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present disclosure is defined by the terms of the claims, rather than the description of the embodiments, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 server, 2 charging equipment, 3 system power supply, 4 charging cable, 21 control unit, 22 storage unit, 23 operation display unit, 24 communication unit, 41, 42 relay, 51, 61 inlet, 52, 62 power conversion device, 53 , 63 battery, 54, 64 monitoring unit, 55, 65 ECU, 100 charging system, A, B vehicles, C smartphone.

Claims (1)

A charge management device that manages a charge schedule in a charging facility configured to be able to charge first and second vehicles each having a power storage device mounted thereon,
The charging facility, when separately charging the first and second vehicles, power supplied to the first vehicle from the charging facility and power supplied to the second vehicle from the charging facility Is configured to exceed the maximum power that can be supplied from the charging facility,
When the second vehicle is electrically connected to the charging facility while the first vehicle is being charged, the charge management device charges the second vehicle after the first vehicle is completely charged. Is inquired to the user of the second vehicle whether or not to accept the first charging schedule, and when the user does not accept the first charging schedule, one of the second and third charging schedules And set
The second charging schedule is a schedule for interrupting charging of the first vehicle and starting charging of the second vehicle,
The third charging schedule is such that the total power of the power supplied from the charging facility to the first vehicle and the power supplied to the second vehicle from the charging facility does not exceed the maximum power. , A charge management device that is a schedule for simultaneously charging both the first and second vehicles.

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