Energy management system and energy management method

Abstract

A charge and discharge plan is prepared when a vehicle having a storage battery can be charged and discharged at a plurality of facilities. The energy management system comprises: a schedule management unit (203) for managing a schedule for movement from a first facility to a second facility; and a charge and discharge plan preparation unit (205) for preparing a first charge and discharge plan as a plan for charging and discharging the storage battery at each of the first and second facilities, wherein the charge and discharge plan preparation unit prepares the first charge and discharge plan in such a manner that the storage battery at the first facility is discharged while leaving mobile power for the vehicle to move from the first facility to the second facility.

Description

Technical Field

[0001] The technology disclosed in this application specification relates to an energy management system and an energy management method. Background Art

[0002] In recent years, vehicles such as electric vehicles (EV) and plug-in hybrid vehicles (PHV) equipped with storage batteries have become increasingly popular.

[0003] In addition, energy management systems are being developed for utilizing batteries mounted on vehicles as chargers and dischargers for power supply equipment for supplying power to facilities such as commercial buildings, complexes, and offices, or for controlling the charging and discharging of batteries mounted on vehicles.

[0004] For example, in the technology disclosed in Patent Document 1, the charging and discharging of the battery is controlled as follows: the charging amount required for driving, i.e., the required charging amount, is calculated based on the schedule information of the EV, and then the remaining power of the battery is compared with the required charging amount. When the required charging amount exceeds the remaining power, the required charging amount is charged during a period when the electricity purchase price is low, and when the required charging amount is lower than the remaining power, the excess amount is discharged during a period when the electricity purchase price is high.

[0005] In addition, for example, in the technology disclosed in Patent Document 2, target values ​​for charging and discharging of a battery mounted on an EV (EV battery) are calculated during the late night time period when the electricity purchase price is low and during the non-late night time period when the electricity purchase price is high. Then, the following battery charging and discharging control is disclosed: the charging amount is controlled to be greater than the target value during the late night time period, and the discharging amount is controlled to be not less than the target value during the non-late night time period.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2015-95983

[0009] Patent Document 2: Japanese Patent Application Publication No. 2017-46421 Summary of the invention

[0010] Technical issues to be solved by the invention

[0011] However, the techniques of Patent Documents 1 and 2 only connect one facility to which the EV is connected, and do not take into account a charge and discharge plan when a vehicle having a storage battery can be charged and discharged at a plurality of facilities.

[0012] The technology disclosed in this specification has been made in view of the above-described problems, and an object of the technology is to provide a technology for creating a charge and discharge plan when a vehicle having a storage battery can be charged and discharged at a plurality of facilities.

[0013] Technical solutions for solving technical problems

[0014] The first scheme of the technology disclosed in the present application specification is an energy management system for managing the charging and discharging of a battery of a vehicle equipped with a battery, comprising: a schedule management unit, which manages a schedule for the vehicle to move from a first facility, which is a facility where the battery can be charged and discharged, to a second facility, which is a facility where the battery can be charged and discharged; and a charge and discharge plan formulation unit, which formulates a first charge and discharge plan, which is a plan for charging and discharging the battery at each of the first facility and the second facility, wherein the charge and discharge plan formulation unit formulates the first charge and discharge plan in such a manner that the battery in the first facility is discharged while leaving behind power for moving the vehicle from the first facility to the second facility, i.e., mobile power.

[0015] In addition, the second scheme of the technology disclosed in the present application specification is an energy management method for managing the charging and discharging of a battery of a vehicle equipped with a battery, managing a schedule for the vehicle to move from a first facility, which is a facility at which the battery can be charged and discharged, to a second facility, which is a facility at which the battery can be charged and discharged, and formulating a first charging and discharging plan, which is a plan for charging and discharging the battery at each of the first facility and the second facility, wherein the first charging and discharging plan is formulated so that the battery in the first facility is discharged while leaving behind power for moving the vehicle from the first facility to the second facility, i.e., mobile power.

[0016] Effects of the Invention

[0017] The first scheme of the technology disclosed in the present application specification is an energy management system for managing the charging and discharging of a battery of a vehicle equipped with a battery, comprising: a schedule management unit that manages a schedule for the vehicle to move from a first facility, which is a facility where the battery can be charged and discharged, to a second facility, which is a facility where the battery can be charged and discharged; and a charge and discharge plan formulation unit that formulates a first charge and discharge plan as a plan for charging and discharging the battery at each of the first facility and the second facility, wherein the charge and discharge plan formulation unit formulates the first charge and discharge plan in such a manner that the battery in the first facility leaves power for the vehicle to move from the first facility to the second facility, i.e., mobile power, and is discharged. According to such a structure, a charge and discharge plan can be formulated when a vehicle equipped with a battery can be charged and discharged at multiple facilities.

[0018] In addition, the second scheme of the technology disclosed in the present application specification is an energy management method for managing the charging and discharging of a battery of a vehicle equipped with a battery, managing a schedule for the vehicle to move from a first facility, which is a facility where the battery can be charged and discharged, to a second facility, which is a facility where the battery can be charged and discharged, and formulating a first charging and discharging plan, which is a plan for charging and discharging the battery at each of the first facility and the second facility, wherein the first charging and discharging plan is formulated so that the battery in the first facility is discharged while leaving power for the vehicle to move from the first facility to the second facility, i.e., mobile power. According to such a structure, a charging and discharging plan can be formulated when a vehicle equipped with a battery can be charged and discharged at multiple facilities.

[0019] In addition, the objects, features, aspects, and advantages associated with the technology disclosed in the present application specification will become more apparent from the following detailed description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a block diagram showing the structure of the energy management system related to the embodiment in more detail.

[0021] Figure 2 A diagram showing an example of information managed in the vehicle information management unit.

[0022] Figure 3 It is a diagram showing an example of a usage schedule managed by the schedule management unit.

[0023] Figure 4 It is a diagram showing an example of the equipment information of the charger and discharger managed by the facility information management unit.

[0024] Figure 5 This is a diagram showing an example of facility information managed by the facility information management unit.

[0025] Figure 6 This is a diagram showing an example of facility information managed by the facility information management unit.

[0026] Figure 7 This is a diagram showing an example of facility information managed by the facility information management unit.

[0027] Figure 8 This is a diagram showing an example of facility information managed by the facility information management unit.

[0028] Fig. 9 This is a diagram showing an example of facility information managed by the facility information management unit.

[0029] Fig.10 This is a diagram showing an example of facility information managed by the facility information management unit.

[0030] Fig.11 1 is a diagram showing an example of the charge and discharge amounts of EV batteries at facility 1 .

[0031] Fig.12 1 is a diagram showing an example of the storage amount of the EV battery at facility 1 .

[0032] Fig.13 : is a diagram showing an example of the charge and discharge amounts of EV batteries at facility 2.

[0033] Fig.14 : is a diagram showing an example of the storage amount of the EV battery in facility 2.

[0034] Fig.15 It is a block diagram showing the structure of the energy management system related to the embodiment in more detail.

[0035] Fig.16 It is a diagram showing an example of a usage schedule managed by the schedule management unit.

[0036] Fig.17 This is a diagram showing an example of power consumption calculated by the power consumption calculation unit.

[0037] Fig.18 It is a block diagram showing the structure of the energy management system related to the embodiment in more detail.

[0038] Fig.19 This is a diagram showing an example of the power purchase unit price of a facility at each time.

[0039] Fig. 20 It is a diagram showing an example of predicted values ​​of power consumption, predicted values ​​of power generation, and contracted power of a facility at each time.

[0040] Fig.21 This is a diagram showing an example of the electricity purchase price determined by the electricity price determination unit.

[0041] Fig. 22 This is a diagram showing an example of the electricity selling price determined by the electricity price determination unit.

[0042] Fig.23 It is a block diagram showing the structure of the energy management system related to the embodiment in more detail.

[0043] Fig.24 This is a flowchart showing an example of the processing flow of the charge and discharge plan preparation unit.

[0044] Fig.25 This is a diagram showing an example of a change in the usage schedule performed by the presentation charge and discharge plan creation unit.

[0045] Fig.26 This is a diagram showing an example of a change in the usage schedule performed by the presentation charge and discharge plan creation unit.

[0046] Fig. 27 This is a diagram showing an example of a change in the usage schedule performed by the presentation charge and discharge plan creation unit.

[0047] Fig.28 This is a diagram showing an example of a change in the usage schedule performed by the presentation charge and discharge plan creation unit.

[0048] Fig.29 This is a diagram showing an example of a change in the usage schedule performed by the presentation charge and discharge plan creation unit.

[0049] Fig.30 This is a diagram showing an example of a change in the usage schedule performed by the presentation charge and discharge plan creation unit.

[0050] Fig.31 This is a diagram showing an example of a change in the usage schedule performed by the presentation charge and discharge plan creation unit.

[0051] Fig.32 This is a diagram showing an example of a change in the usage schedule performed by the presentation charge and discharge plan creation unit.

[0052] Fig.33 FIG. 1 is a diagram showing an example of a usage schedule presented to an EV user.

[0053] Fig.34 To briefly illustrate the actual operation Fig.36 FIG. 4 is a diagram of the hardware structure of the energy management system illustrated in FIG.

[0054] Fig.35 To briefly illustrate the actual operation Fig.36 FIG. 4 is a diagram of the hardware structure of the energy management system illustrated in FIG.

[0055] Fig.36 This is a diagram conceptually showing an example of the configuration of an energy management system according to the present embodiment.

[0056] Reference numerals

[0057] 101, 101a, 101b, 101c: energy management system; 102, 103: facility; 104: charger and discharger; 105: EV; 201: vehicle information receiving unit; 202: vehicle information management unit; 203, 203a, 1001: schedule management unit; 204, 204b: facility information management unit; 205, 205a, 205b, 1002: charge and discharge plan formulation unit; 206: charge and discharge plan notification unit; 207: power consumption calculation unit; 208: measurement value management unit; 209: facility power prediction unit; 210: power unit price determination unit; 211: presentation charge and discharge plan formulation unit; 212: usage schedule presentation unit; 1102A, 1102B: processing circuit; 1103: storage device. DETAILED DESCRIPTION

[0058] The following embodiments are described with reference to the drawings. In the following embodiments, detailed features are shown for explaining the technology, but those are only examples and are not all essential features for implementing the embodiments.

[0059] In addition, the drawings are schematically shown, and for the convenience of explanation, the structure is appropriately omitted or simplified in the drawings. In addition, the size and position of the structures shown in different drawings are not necessarily accurately recorded, but can be appropriately changed. In addition, even in drawings such as top views that are not cross-sectional views, hatching is sometimes added to make the content of the embodiment easier to understand.

[0060] In the following description, the same components are denoted by the same reference numerals, and their names and functions are also the same, so their detailed description may be omitted to avoid duplication.

[0061] In the following description, ordinal numbers such as “first” or “second” may be used. These terms are used for convenience in order to make the contents of the embodiments easier to understand, and are not limited to the order that can be generated based on these ordinal numbers.

[0062] <About the conceptual structure of the energy management system>

[0063] Fig.36 This is a diagram conceptually showing an example of the configuration of an energy management system according to the present embodiment.

[0064] like Fig.36 As illustrated in FIG. 1 , the energy management system includes a schedule management unit 1001 and a charge / discharge plan formulation unit 1002 .

[0065] The schedule management unit 1001 is a functional unit for managing a schedule for a vehicle to move from a first facility, which is a facility where a battery can be charged and discharged, to a second facility, which is a facility where a battery can be charged and discharged. The charge and discharge plan formulation unit 1002 is a functional unit for formulating a first charge and discharge plan, which is a plan for charging and discharging batteries at each of the first facility and the second facility.

[0066] Then, the charge and discharge plan formulation unit 1002 formulates the first charge and discharge plan so that the storage battery is discharged at the first facility while leaving power for moving the vehicle from the first facility to the second facility, that is, travel power.

[0067] In the following embodiments, an EV is described as an example of a vehicle equipped with a storage battery. However, the vehicle equipped with a storage battery is not limited to an EV, and it is assumed that vehicles such as PHVs are also included.

[0068] <First Embodiment>

[0069] The energy management system and energy management method according to the present embodiment will be described below.

[0070] <About the structure of the energy management system>

[0071] Figure 1 It is a block diagram which shows the structure of the energy management system concerning this embodiment in more detail.

[0072] like Figure 1 As shown in the example in , the energy management system 101 is in a state where it can communicate with the facility 102 and the facility 103. The facility 102 is, for example, a home. In addition, the facility 103 is, for example, a building at a workplace. In addition, each facility 102 and the facility 103 maintains a charger 104 for charging and discharging the EV battery. In addition, although the charger 104 at each facility is shown by the same reference numeral, the performance of each charger 104 (for example, the minimum and maximum values ​​of the chargeable and dischargeable capacity) may be different.

[0073] The energy management system 101 comprises: a vehicle information receiving unit 201 for receiving information indicating the storage capacity of the EV battery (EV storage capacity) or the chargeable and dischargeable capacity, i.e., vehicle information; a vehicle information management unit 202 for managing vehicle information; a schedule management unit 203 for managing a usage schedule including a facility to which an EV user plans to connect the EV 105, i.e., a scheduled connection facility, a time when the EV user plans to connect the EV 105, i.e., a scheduled connection time, a time when the EV user plans to disconnect the EV 105, i.e., a scheduled disconnection time, or a usage schedule for the EV 105 to move between multiple facilities; a facility information receiving unit 201 for receiving information indicating the storage capacity of the EV battery (EV storage capacity) or the chargeable and dischargeable capacity, etc.; a vehicle information management unit 202 for managing vehicle information; a schedule management unit 203 for managing a usage schedule including a facility to which an EV user plans to connect the EV 105, i.e., a scheduled connection facility, a time when the EV user plans to connect the EV 105, i.e., a scheduled disconnection time, a time when the EV user plans to disconnect the EV 105, i.e., a scheduled disconnection time, or a power required for the EV 105 to move between multiple facilities, etc. The information management unit 204 manages information including information on power unit prices such as the power purchase unit price or the power sales unit price of the scheduled connected facilities at various times, namely, facility information; the charge and discharge plan formulation unit 205 formulates a charge and discharge plan for the EV battery at each facility based on the vehicle information, facility information, and usage schedule, so as to ensure the power required for the travel of the EV 105 while suppressing the total power cost due to the charging and discharging of the EV battery; and the charge and discharge plan notification unit 206 notifies the formulated charge and discharge plan to the EV 105, the charger and discharger at each facility, or the controller that notifies the charger and discharger of the control value.

[0074] First, the vehicle information receiving unit 201 will be described. The vehicle information receiving unit 201 obtains information such as the current storage amount of the EV battery (current storage amount) or the current charge and discharge power, that is, the current information of the vehicle, from the EV 105 .

[0075] Next, the vehicle information management unit 202 will be described. The vehicle information management unit 202 manages the current information of the vehicle acquired by the vehicle information receiving unit 201 and also manages vehicle information including the EV storage capacity, chargeable and dischargeable capacity, and charge and discharge efficiency.

[0076] Figure 2 FIG. 2 is a diagram showing an example of information managed by the vehicle information management unit 202. Figure 2 As shown in the example in , the vehicle information management unit 202 manages the EV name, EV storage capacity, current storage capacity, minimum value of chargeable and dischargeable capacity, maximum value of chargeable and dischargeable capacity, and charge and discharge efficiency.

[0077] exist Figure 2 In the example, the EV name is "Vehicle 1", the EV storage capacity is "30.0 kWh", the current storage capacity is "9.0 kWh", the minimum chargeable and dischargeable capacity is "4.5 kWh", the maximum chargeable and dischargeable capacity is "30.0 kWh", and the charge and discharge efficiency is "100%".

[0078] Next, the schedule management unit 203 is described. The schedule management unit 203 manages a usage schedule including the scheduled arrival time, which is the time when the EV user plans to make EV105 arrive, the scheduled departure time, which is the time when the EV user plans to make EV105 depart, the facility where the EV user plans to make EV105 arrive, which is the scheduled arrival facility, or the amount of electricity (required electricity) required for EV105 to move between multiple facilities. That is, the schedule management unit 203 manages a schedule for EV105 to move between multiple facilities. Here, the scheduled arrival time can be replaced by the scheduled connection time. In addition, the scheduled departure time can also be replaced by the scheduled disconnection time. In addition, the scheduled arrival facility can also be replaced by the scheduled connection facility.

[0079] The above-mentioned usage schedule is registered by a dedicated application for setting the usage schedule, etc. The dedicated application used when setting the usage schedule may be a function of a car navigation system or an application that can be used from a mobile terminal, etc.

[0080] Figure 3 2 is a diagram showing an example of a usage schedule managed by the schedule management unit 203. Figure 3 As shown in the example in , the schedule management unit 203 manages the scheduled arrival date and time when the EV user plans to arrive at the EV 105, the scheduled departure date and time when the EV user plans to depart the EV 105, the scheduled arrival facility, and the required power.

[0081] exist Figure 3 In the example, the following situation is managed as 1 schedule: the scheduled arrival date is "2018 / 9 / 6", the scheduled arrival time is "18:00", the scheduled departure date is "2018 / 9 / 7", the scheduled departure time is "07:00", the scheduled arrival facility is "facility 1", and the required power is "6.0 kWh".

[0082] In addition, Figure 3 In the example, the following situations are managed as other schedules: the scheduled arrival date is "2018 / 9 / 7", the scheduled arrival time is "08:00", the scheduled departure date is "2018 / 9 / 7", the scheduled departure time is "17:00", the scheduled arrival facility is "Facility 2", and the required power is "6.0kWh".

[0083] Next, the facility information management unit 204 will be described. The facility information management unit 204 manages the equipment information of the charger / discharger held in each facility (ie, scheduled connection facility) such as a home or factory to which the EV user plans to connect the charger / discharger as facility information.

[0084] Figure 42 is a diagram showing an example of equipment information of a charger and a discharger managed by the facility information management unit 204. Figure 4 As shown in the example in , the facility information management unit 204 manages the name of the scheduled connection facility, the name of the charger / discharger maintained by the scheduled connection facility, the maximum charging power of the charger / discharger maintained by the scheduled connection facility, and the maximum discharging power of the charger / discharger maintained by the scheduled connection facility.

[0085] exist Figure 4 In the example, the following situation is managed as 1 device information: the name of the scheduled connection facility is "facility 1", the name of the charger and discharger maintained by the scheduled connection facility is "charger 1", the maximum charging power of the charger and discharger maintained by the scheduled connection facility is "6.00kW", and the maximum discharging power of the charger and discharger maintained by the scheduled connection facility is "6.00kW".

[0086] In addition, Figure 4 In the example, the following situations are managed as other equipment information: the name of the scheduled connection facility is "Facility 2", the name of the charger and discharger maintained by the scheduled connection facility is "Charger 1", the maximum charging power of the charger and discharger maintained by the scheduled connection facility is "6.00kW", and the maximum discharging power of the charger and discharger maintained by the scheduled connection facility is "6.00kW".

[0087] In addition, the facility information management unit 204 manages the power purchase price of each scheduled connection facility at each time. Then, the facility information management unit 204 determines and manages the power purchase price and power sales price for charging and discharging the EV battery based on the power purchase price.

[0088] Here, the purchase of electricity refers to the purchase of electricity supplied by discharge from EV batteries, and the sale of electricity refers to the sale of electricity used to charge EV batteries.

[0089] Figure 5 , Figure 6 and Figure 7 It is a diagram showing an example of facility information managed by the facility information management unit 204 . Figure 5 An example of the power purchase price of the facility 1 at each time is shown in FIG. Figure 6 An example of the unit price of electricity purchased by facility 1 at each time is shown in FIG. Figure 7 An example of the unit price of electricity sold by facility 1 at each time is shown in FIG. Figure 5 , Figure 6 and Figure 7 In the figure, the vertical axis represents the unit price of electricity [yen / kWh], and the horizontal axis represents the time [hour].

[0090] like Figure 5 , Figure 6 and Figure 7As shown in the example, at facility 1, during the time period from 8:00 to 21:00, the unit price of electricity purchased increased from 10 [yen / kWh] to 15 [yen / kWh], the unit price of electricity sold increased from 10 [yen / kWh] to 15 [yen / kWh], and the unit price of electricity sold increased from 10 [yen / kWh] to 15 [yen / kWh].

[0091] Figure 8 , Fig. 9 and Fig.10 It is a diagram showing an example of facility information managed by the facility information management unit 204 . Figure 8 An example of the power purchase price of the facility 2 at each time is shown in FIG. Fig. 9 An example of the unit price of electricity purchased by facility 2 at various times is shown in FIG. Fig.10 An example of the unit price of electricity sold by facility 2 at each time is shown in FIG. Figure 8 , Fig. 9 and Fig.10 In the figure, the vertical axis represents the unit price of electricity [yen / kWh], and the horizontal axis represents the time [hour].

[0092] like Figure 8 , Fig. 9 and Fig.10 As shown in the example, at Facility 2, during the time period from 0:00 to 8:00, the electricity purchase price is 10 [yen / kWh], the electricity purchase price is 10 [yen / kWh], and the electricity sales price is 10 [yen / kWh]. Also, at Facility 2, during the time period from 8:00 to 12:00, the electricity purchase price is 30 [yen / kWh], the electricity purchase price is 20 [yen / kWh], and the electricity sales price is 30 [yen / kWh].

[0093] In addition, at Facility 2, during the time period from 12:00 to 17:00, the unit price for purchasing electricity is 20 [yen / kWh], the unit price for purchasing electricity is 18 [yen / kWh], and the unit price for selling electricity is 20 [yen / kWh]. In addition, at Facility 2, during the time period from 17:00 to 21:00, the unit price for purchasing electricity is 30 [yen / kWh], the unit price for purchasing electricity is 20 [yen / kWh], and the unit price for selling electricity is 30 [yen / kWh].

[0094] In addition, at Facility 2, during the period from 21:00 to 24:00, the unit price for purchasing electricity is 20 [yen / kWh], the unit price for purchasing electricity is 18 [yen / kWh], and the unit price for selling electricity is 20 [yen / kWh].

[0095] The facility information managed by the facility information management unit 204 may include information on incentives based on discharge (sale of electric power) in addition to the power purchase price or the power sale price.

[0096] The above-mentioned incentive may be, for example, an amount paid to the EV user that varies at each time. When the scheduled connection facility is a shopping facility such as a department store or a mall, it may be a discount coupon or the like that can be used at the scheduled connection facility (which may be usable only on specific dates and times). When the scheduled connection facility is the EV user's commuting destination such as a factory or an office, it may be the electricity bill paid by the EV user for charging the EV battery, or it may be a certain amount of commuting allowance.

[0097] Next, the charge and discharge plan formulation unit 205 will be described. Based on the vehicle information managed by the vehicle information management unit 202, the usage schedule managed by the schedule management unit 203, and the power unit price information of each scheduled connection facility included in the facility information managed by the facility information management unit 204, the charge and discharge plan formulation unit 205 formulates a charge and discharge plan for the EV battery at each facility in a manner that minimizes the total power cost due to the charge and discharge of the EV battery while ensuring the power required for the travel of the EV 105 (i.e., the required power at the time of departure) within the range of the chargeable and dischargeable capacity of the EV battery.

[0098] For example, when the facility information managed by the facility information management unit 204 is the electricity purchase price and electricity sales price of the scheduled connection facility, the charge and discharge plan for the EV battery at each facility formulated by the charge and discharge plan formulation unit 205 is a charge and discharge plan including the following contents: first, during the period when the EV 105 is connected to the scheduled connection facility and the time period when the electricity sales price is low, the EV 105 is charged with the amount of electricity required for the travel of the EV 105. Alternatively, the EV battery is discharged during the period when the EV 105 is connected to the scheduled connection facility and the time period when the electricity purchase price is high, and on this basis, the EV battery is charged with an amount of electricity greater than the amount required for the travel of the EV 105 (for example, until the maximum chargeable amount) during the period when the EV 105 is connected to the scheduled connection facility and the time period when the electricity sales price is low.

[0099] The charging and discharging plan further includes discharging the power stored in the EV battery while the EV 105 is connected to the predetermined connection facility and during a time period when the electricity purchase price is high, leaving the power required for the EV 105 to travel.

[0100] Specifically, the charge and discharge plan formulation unit 205 calculates the charge and discharge plan at each time point at a certain interval (for example, every 1 hour) during a certain period (for example, until 24 hours later) from the time of plan formulation.

[0101] At this time, the charge and discharge plan making unit 205 sets the current power storage of the EV battery at the time of plan making managed by the vehicle information management unit 202 as the initial value, and similarly, within the range between the minimum value and the maximum value of the charge and discharge capacity of the EV battery managed by the vehicle information management unit 202, in order to ensure that the capacity (power storage) is greater than the required power for EV105 to move between facilities before the scheduled departure time of EV105 at each facility managed by the schedule management unit 203, the charge and discharge plan is made within the range of the maximum charging power and the maximum discharge power of the charger and discharger of each scheduled connected facility managed by the facility information management unit 204.

[0102] However, when the capacity (storage amount) required for EV105 to move between facilities cannot be ensured due to equipment constraints of EV105 or the charger / discharger, the charge / discharge plan formulation unit 205 formulates a charge / discharge plan in which the storage amount of the EV battery is as close to the required amount as possible.

[0103] Then, when there are multiple charging and discharging plans that meet the above conditions, it is possible to select a charging and discharging plan from these charging and discharging plans with the smallest value obtained by deducting the discharge profit generated by discharging from the charging cost generated by charging, calculated based on the electricity purchase unit price and electricity sales unit price of the scheduled connection facility at each time.

[0104] As one of the methods for calculating the above-mentioned charge and discharge plan by the charge and discharge plan preparation unit 205, there is a method of calculating the charge and discharge plan by expressing the above-mentioned conditions as constraint conditions and objective functions of the optimization problem using mathematical formulas and solving the optimization problem using an optimization solver.

[0105] The following is an example of expressing the above conditions using mathematical formulas. In addition, t used in the following formula represents an index of a period when the time from the time of plan making (t=0) to the plan making period (t=T (for example, 24 hours)) is divided into a certain period (for example, 1 hour). In addition, i used in the following formula represents the index of F facilities that are scheduled to be connected.

[0106] First, as a constraint condition, when a range between a minimum value and a maximum value of the chargeable and dischargeable capacity of an EV battery is expressed by a mathematical expression, it is as shown in the following equation (1).

[0107] [Mathematical formula 1]

[0108] SOC_MIN≤SOC(t)≤SOC_MAX (1)

[0109] Here, SOC in equation (1) represents the amount of electricity stored in the EV battery at time t. In addition, SOC_MIN represents the minimum value of the chargeable and dischargeable capacity of the EV battery. In addition, SOC_MAX represents the maximum value of the chargeable and dischargeable capacity of the EV battery.

[0110] Furthermore, when calculating the charge and discharge plan, the amount of electricity stored in the EV battery changes according to the charge and discharge plan at each time. When this change is expressed in a mathematical expression, it is as shown in the following equation (2).

[0111] [Mathematical formula 2]

[0112] SOC(t)=SOC(t-1)+EFF·(E_EV_DISCHARGE(t)-E_EV_CHARGE(T)) (2)

[0113] Here, SOC in equation (2) represents the amount of electricity stored in the EV battery at time t. In addition, EFF represents the charge and discharge efficiency of the EV battery. In addition, E_EV_CHARGE represents the charge power of the EV battery. In addition, E_EV_DISCHARGE represents the discharge power of the EV battery.

[0114] However, since charging and discharging cannot exist simultaneously at time t, the following conditions are given.

[0115] [Mathematical formula 3]

[0116] E_EV_CHARGE(t)·E_EV_DISCHARGE(t)=0 (3)

[0117] The above formula (3) means that at least one of the charging power and the discharging power is 0. By using this condition, it is possible to perform any operation of charging or discharging according to the charging and discharging plan at time t.

[0118] Next, when a condition for ensuring a capacity (storage power) greater than or equal to the power required for the EV 105 to move between facilities before the scheduled departure time of the EV 105 at each facility is expressed in a mathematical expression, it is as shown in the following equation (4).

[0119] [Formula 4]

[0120] SOC(OUT_TIME)≥NECCESSAT_SOC_VALUE (4)

[0121] Here, OUT_TIME in equation (4) represents the scheduled departure time of EV 105. In addition, SOC(OUT_TIME) represents the storage amount of the EV battery at the scheduled departure time. In addition, NECCESSAY_SOC_VALUE represents the required charge amount required for EV 105 to move between facilities.

[0122] Next, when the range of the maximum charging power and the maximum discharging power of the charger and discharger of each scheduled connection facility is expressed by a mathematical expression when calculating the charging and discharging plan at each time, it is as shown in the following equation (5).

[0123] [Formula 5]

[0124]

[0125] Here, E_EV_CHARGE in formula (5) represents the charging power of the battery at time t. In addition, E_EV_DISCHARGE represents the discharging power of the battery at time t. In addition, E_EV_CHARGE_MAX represents the maximum value of the charging power of the charger and discharger at the scheduled connection facility i. In addition, E_EV_DISCHARGE_MAX represents the maximum value of the discharging power of the charger and discharger at the scheduled connection facility i. In addition, IN_TIME represents the scheduled arrival time at the scheduled connection facility i. In addition, OUT_TIME represents the scheduled departure time at the scheduled connection facility i.

[0126] The above are the constraints for formulating the charging and discharging plan of the EV battery at each time. Next, when a mathematical formula is used to express the objective function for selecting the charging and discharging plan that satisfies the above constraints, the value obtained by subtracting the discharge profit generated by discharging from the charging cost generated by charging is minimized, which is calculated based on the purchase price and sales price of electricity of the predetermined connection facilities at each time, as shown in the following formula (6).

[0127] [Mathematical formula 6]

[0128]

[0129] C_BUY(i,t)=E_EV_CHARGE(t)·E_BUY_COST(i,t)

[0130] C_SELL(i,t)=E_EV_DISCHARGE(t)·E_SELL_COST(i,t) (6)

[0131] Here, C_BUY in equation (6) represents the charging cost at time t. In addition, C_SELL represents the discharging profit at time t. In addition, E_BUY_COST represents the unit price of electricity sold at time t. In addition, E_SELL_COST represents the unit price of electricity purchased at time t.

[0132] Then, a charging and discharging plan is formulated that minimizes the value obtained by subtracting the discharging profit from the charging cost at each moment.

[0133] Fig.11 and Fig.12 1 is a diagram showing an example of a charge and discharge plan for an EV battery at a facility 1 prepared by the charge and discharge plan preparation unit 205 .

[0134] Fig.11 : is a diagram showing an example of the charge and discharge amount of the EV battery at facility 1. Fig.11 In the figure, the vertical axis represents the charge and discharge amount [kWh], and the horizontal axis represents the time [hour]. In addition, regarding the charge and discharge amount, a positive value represents the discharge amount, and a negative value represents the charge amount.

[0135] like Fig.11 As shown in the example in , at facility 1, 3 [kWh] of EV batteries are charged during the time period from 0:00 to 6:00 and the time period from 21:00 to 24:00.

[0136] in addition, Fig.12 : is a diagram showing an example of the amount of electricity stored in the EV battery at facility 1. Fig.12 In the figure, the vertical axis represents the power storage rate [%], and the horizontal axis represents the time [hour].

[0137] like Fig.12 As shown in the example in , at facility 1, charging is performed in the time periods from 0:00 to 6:00 and from 21:00 to 24:00, so the power storage rate increases in each time period.

[0138] Likewise, Fig.13 and Fig.14 1 is a diagram showing an example of a charge and discharge plan for an EV battery at a facility 2 prepared by the charge and discharge plan preparation unit 205 .

[0139] Fig.13 : is a diagram showing an example of the charge and discharge amount of the EV battery at facility 2. Fig.13 In the figure, the vertical axis represents the charge and discharge amount [kWh], and the horizontal axis represents the time [hour]. In addition, regarding the charge and discharge amount, a positive value represents the discharge amount, and a negative value represents the charge amount.

[0140] like Fig.13 As shown in the example, at Facility 2, 4 [kWh] of EV battery discharge was performed during the time period from 8:00 to 11:00. Also, at Facility 2, 3 [kWh] of EV battery discharge was performed during the time period from 11:00 to 12:00.

[0141] in addition, Fig.14 : is a diagram showing an example of the amount of electricity stored in the EV battery at facility 2. Fig.14 In the figure, the vertical axis represents the power storage rate [%], and the horizontal axis represents the time [hour].

[0142] like Fig.14As shown in the example in , in facility 2, since discharge is performed during the time period from 8:00 to 12:00, the storage rate decreases during this time period. However, the reduction rates of the storage rate are different between the time period from 8:00 to 11:00 and the time period from 11:00 to 12:00 due to the difference in discharge amount.

[0143] Next, the charge and discharge plan notification unit 206 is described. The charge and discharge plan notification unit 206 notifies the EV user, the charger and discharger 104 at each facility, or the controller that controls the charger and discharger 104 (for example, home energy management system (HEMS), factory energy management system (FEMS), building energy management system (BEMS)) of the charge and discharge plan of the EV battery at each facility formulated by the charge and discharge plan formulation unit 205.

[0144] In addition, as a notification method for EV users, notification can be made to a mobile terminal held by the EV user, or instead of notifying the EV user, notification can be made to a dedicated application that can control the charging and discharging of the EV battery, such as a charging and discharging control device at each facility.

[0145] By using the energy management system 101 as described above, based on the usage schedule of EV 105 and the difference in buying and selling electricity prices between multiple facilities, a charging and discharging plan for EV batteries can be formulated to maximize the profit generated by the difference between the selling price of electricity during charging and the buying price of electricity during discharging, while ensuring the amount of electricity required for EV 105 to move between facilities by discharging the electricity charged at a low price at a high price by the EV user. By charging and discharging the EV battery based on such a charging and discharging plan, the total electricity cost of the EV user related to the charging and discharging of the EV battery can be reduced.

[0146] In addition, in this embodiment, an energy management system using one EV 105 and two facilities is described, but a plurality of EVs 105 may be used, and the number of facilities is not limited to the above.

[0147] <Second Embodiment>

[0148] In the following description, the same components as those described in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is appropriately omitted.

[0149] <About the structure of the energy management system>

[0150] In the first embodiment, the EV user manages the EV user's usage schedule by setting the scheduled arrival time, the scheduled departure time, the scheduled arrival facility, and the required power using a dedicated application, etc. Furthermore, it is preferred that the EV user also sets the storage power of the EV battery at the time of arriving at the scheduled arrival facility.

[0151] However, it is difficult for an EV user to accurately set the storage capacity and required capacity of the EV battery at the time of arriving at the scheduled arrival facility.

[0152] Therefore, in the energy management system according to the present embodiment, the stored electricity amount and the required electricity amount of the EV battery at the time of arrival at the scheduled arrival facility are automatically calculated.

[0153] Fig.15 It is a block diagram which shows the structure of the energy management system concerning this embodiment in more detail.

[0154] like Fig.15 As shown in the example in FIG. 1 , the energy management system 101 a is in a state where it can communicate with the facility 102 and the facility 103 .

[0155] Then, the energy management system 101a includes a vehicle information receiving unit 201, a vehicle information management unit 202, a schedule management unit 203a for managing a usage schedule, a facility information management unit 204, a charge and discharge plan formulation unit 205a, a charge and discharge plan notification unit 206 and a power consumption calculation unit 207, wherein the charge and discharge plan formulation unit 205a formulates a charge and discharge plan for the EV battery at each facility based on the vehicle information, facility information, usage schedule and the power consumed by the EV 105 when moving between facilities, i.e., the power consumption, so as to ensure the power required for the EV 105 to travel while suppressing the total power cost caused by the charging and discharging of the EV battery.

[0156] First, the timetable management unit 203a will be described. In the present embodiment, the EV user only sets the scheduled arrival time, the scheduled departure time, and the scheduled arrival facility in the timetable management unit 203a.

[0157] Fig.16 2 is a diagram showing an example of a usage schedule managed by the schedule management unit 203a. Fig.16 As shown in the example in , the scheduled arrival date, the scheduled arrival time, the scheduled departure date, the scheduled departure time, and the scheduled arrival facility are managed in the schedule management unit 203a.

[0158] exist Fig.16In the example, the following situation is managed as one schedule: the scheduled arrival date is "2018 / 9 / 6", the scheduled arrival time is "18:00", the scheduled departure date is "2018 / 9 / 7", the scheduled departure time is "07:00", and the scheduled arrival facility is "Facility 1".

[0159] In addition, Fig.16 In the example of , the following is managed as other schedules: the scheduled arrival date is "2018 / 9 / 7", the scheduled arrival time is "08:00", the scheduled departure date is "2018 / 9 / 7", the scheduled departure time is "17:00", and the scheduled arrival facility is "Facility 2".

[0160] Next, the power consumption calculation unit 207 will be described. The power consumption calculation unit 207 calculates power consumption based on the scheduled arrival time, the scheduled departure time, and the scheduled arrival facility managed by the schedule management unit 203a.

[0161] The power consumption can be calculated based on the travel distance and travel time of the movement route obtained from a map application or a car navigation system, for example. Alternatively, the power consumption can be calculated based on information on the travel performance of EV 105 to date.

[0162] Fig.17 2 is a diagram showing an example of the power consumption calculated by the power consumption calculation unit 207. Fig.17 As shown in the example in , the power consumption is calculated by the power consumption calculation unit 207.

[0163] exist Fig.17 In FIG. 1 , as an example of one power consumption, the power consumption when the movement origin is “facility 1” and the movement destination is “facility 2” is “6.00 kWh”.

[0164] In addition, Fig.17 As another example of power consumption, the power consumption when the movement origin is "facility 2" and the movement destination is "facility 1" is "6.00 kWh".

[0165] Then, the charging and discharging plan making unit 205a makes a charging and discharging plan for the EV battery at each facility based on the vehicle information managed by the vehicle information management unit 202, the usage schedule managed by the schedule management unit 203a, the electricity unit price information of each scheduled connection facility contained in the facility information managed by the facility information management unit 204, and the power consumption calculated by the power consumption calculation unit 207, within the range of the chargeable and dischargeable capacity of the EV battery, in such a way as to ensure the power required for the EV 105 to travel (i.e., the required power at departure) while minimizing the total power cost due to the charging and discharging of the EV battery.

[0166] The energy management system 101a described above can reduce the burden on EV users due to setting usage schedules, thereby improving the convenience of EV users.

[0167] <Third Embodiment>

[0168] In the following description, the same components as those described in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is appropriately omitted.

[0169] <About the structure of the energy management system>

[0170] In the above-mentioned embodiment, the purchase price and the selling price of electricity at each facility are determined based on the power purchase price based on the contract with the retail power company. However, depending on the facility, it is sometimes necessary to adjust the purchase price and the selling price of electricity at each time based on the contract power (maximum value of purchased power), the power consumption (power load) of the facility, or the power generation of renewable energy equipment such as solar power generation equipment.

[0171] Therefore, in the energy management system according to the present embodiment, the purchase price and the sale price of electricity at each time are determined based on the power demand of the facility based on the power consumption of the facility, the power generation amount of the renewable energy equipment, and the like.

[0172] Fig.18 It is a block diagram which shows the structure of the energy management system concerning this embodiment in more detail.

[0173] like Fig.18 As shown in the example in FIG. 1 , the energy management system 101 b is in a state where it can communicate with the facility 102 and the facility 103 .

[0174] Then, the energy management system 101b includes a vehicle information receiving unit 201, a vehicle information management unit 202, a schedule management unit 203a, a facility information management unit 204b for managing facility information, a charge and discharge plan formulation unit 205b, a charge and discharge plan notification unit 206, a power consumption calculation unit 207, a measurement value management unit 208, a facility power prediction unit 209 and a power unit price determination unit 210, wherein the charge and discharge plan formulation unit 205b formulates a charge and discharge plan for the EV battery at each facility based on the vehicle information, facility information, usage schedule, power consumption and power unit price information, so as to ensure the power required for the driving of EV105 while suppressing the total power cost due to the charging and discharging of the EV battery.

[0175] First, the facility information management unit 204b will be described. The facility information management unit 204b according to the present embodiment manages the power purchase unit price and the contract power (maximum value of the purchased power) at each time.

[0176] Next, the measurement value management unit 208 will be described. The measurement value management unit 208 manages the power consumption of the load equipment of each facility or the power generation amount of the renewable energy equipment measured in each facility.

[0177] Next, the facility power prediction unit 209 will be described. The facility power prediction unit 209 calculates the predicted value of the power consumption of the entire facility at each time and the predicted value of the power generation of the renewable energy device based on the power consumption of the load equipment of the facility and the power generation of the renewable energy device managed by the measurement value management unit 208. In addition, as a method for predicting power consumption or a method for predicting power generation, there is a method of predicting using a known technology using meteorological information, etc.

[0178] Next, the power price determination unit 210 will be described. The power price determination unit 210 determines the power purchase price and the power sale price or the incentive based on discharge based on the power purchase price and the contract power managed by the facility information management unit 204b and the predicted value of power consumption and power generation calculated by the facility power prediction unit 209.

[0179] Here, the method of determining the power purchase price and the power sales price is described using an example. Fig.19 is a diagram showing an example of the power purchase price of a facility at each time. Fig.19 In the figure, the vertical axis represents the unit price of electricity [yen / kWh], and the horizontal axis represents the time [hour].

[0180] like Fig.19 As shown in the example, the unit price of electricity purchased at this facility is 10 [yen / kWh] during the time period from 0:00 to 8:00. In addition, the unit price of electricity purchased at this facility is 30 [yen / kWh] during the time period from 8:00 to 12:00.

[0181] In addition, at this facility, the unit price of electricity purchased is 20 [yen / kWh] during the time period from 12:00 to 17:00. In addition, at this facility, the unit price of electricity purchased is 30 [yen / kWh] during the time period from 17:00 to 21:00.

[0182] In addition, at this facility, the unit price of electricity purchased is 20 [yen / kWh] during the time period from 21:00 to 24:00.

[0183] in addition, Fig. 20 1 is a diagram showing an example of the predicted value of power consumption, predicted value of power generation, and contracted power of a facility at each time. Fig. 20In the figure, the vertical axis represents the electricity price [yen / kWh], and the horizontal axis represents the time [hour]. Fig. 20 In FIG. 1 , the predicted value of power consumption is shown by a dotted line, the predicted value of power generation is shown by a dashed line, and the contracted power is shown by a solid line.

[0184] like Fig. 20 As shown in the example in , in this facility, the predicted value of power consumption is high and the predicted value of power generation is low during the time period from 9:00 to 10:00. Therefore, there is a possibility that the contracted power of the facility is exceeded during this time period.

[0185] Therefore, in order to obtain a large amount of discharge from the connected EV 105 during this time period, the purchase price of electricity during this time period is set higher than that during other time periods.

[0186] On the other hand, in this facility, the predicted value of power generation may exceed the predicted value of power consumption during the time period from 12:00 to 13:00.

[0187] Therefore, in order to use the excess power in this time period to charge the connected EV 105, the electricity selling price in this time period is set lower than that in other time periods.

[0188] In this manner, the power price determination unit 210 determines the power purchase price and the power sales price of the facility based on the predicted value of power consumption and the predicted value of power generation.

[0189] Fig.21 1 is a diagram showing an example of the electricity purchase price determined by the electricity price determination unit 210 .

[0190] like Fig.21 As shown in the example, the unit price of electricity purchased at this facility is 10 [yen / kWh] during the time period from 0:00 to 8:00. Also, the unit price of electricity purchased at this facility is 20 [yen / kWh] during the time period of 8:00.

[0191] In addition, at this facility, the unit price of electricity purchased is 40 [yen / kWh] during the time period from 9:00 to 10:00. In addition, at this facility, the unit price of electricity purchased is 20 [yen / kWh] during the time period from 10:00 to 12:00.

[0192] In addition, at this facility, the unit price of electricity purchased is 0 [yen / kWh] (i.e., it can be purchased for free) during the time period from 12:00 to 13:00. In addition, at this facility, the unit price of electricity purchased is 18 [yen / kWh] during the time period from 13:00 to 17:00.

[0193] In addition, the unit price of electricity purchased at this facility is 20 [yen / kWh] during the time period from 17:00 to 21:00. In addition, the unit price of electricity purchased at this facility is 18 [yen / kWh] during the time period from 21:00 to midnight.

[0194] Fig. 221 is a diagram showing an example of the power selling price determined by the power price determination unit 210 .

[0195] like Fig. 22 As shown in the example, the unit price of electricity sold at this facility is 10 [yen / kWh] during the time period from 0:00 to 8:00. In addition, the unit price of electricity sold at this facility is 30 [yen / kWh] during the time period from 8:00 to 12:00.

[0196] In addition, at this facility, the unit price of electricity sold is 5 [yen / kWh] during the time period from 12:00 to 13:00. In addition, at this facility, the unit price of electricity sold is 20 [yen / kWh] during the time period from 13:00 to 17:00.

[0197] In addition, the unit price of electricity sold at this facility is 30 [yen / kWh] during the time period from 17:00 to 22:00. In addition, the unit price of electricity sold at this facility is 20 [yen / kWh] during the time period from 22:00 to 24:00.

[0198] Then, the charging and discharging plan formulation unit 205b formulates a charging and discharging plan for the EV battery at each facility based on the vehicle information managed by the vehicle information management unit 202, the usage schedule managed by the schedule management unit 203a, the electricity unit price information determined by the electricity unit price determination unit 210, and the power consumption calculated by the power consumption calculation unit 207, within the range of the chargeable and dischargeable capacity of the EV battery, in such a way as to ensure the power required for the travel of the EV 105 (i.e., the required power at departure) while minimizing the total power cost due to the charging and discharging of the EV battery.

[0199] According to the energy management system 101 b as described above, the power purchase price and the power sales price can be determined according to the power demand of the facility based on the power consumption of the facility, the power generation amount of renewable energy, and the like.

[0200] <Fourth Implementation Method>

[0201] In the following description, the same components as those described in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is appropriately omitted.

[0202] <About the structure of the energy management system>

[0203] In the above embodiment, within the usage schedule of the EV user, a charging and discharging plan is prepared to reduce the total power cost due to charging and discharging of the EV battery based on the power purchase and sales prices of the scheduled connection facilities at each time.

[0204] However, depending on the EV user, sometimes charging and discharging the EV battery beyond the range of the usage schedule can reduce the total power cost due to charging and discharging the EV battery.

[0205] Therefore, in the energy management system related to this embodiment, times outside the usage schedule of EV105 set by the EV user are also considered, and a usage schedule and charging and discharging plan that can reduce the total electricity cost due to charging and discharging of the EV battery are calculated and presented to the EV user.

[0206] Fig.23 It is a block diagram which shows the structure of the energy management system concerning this embodiment in more detail.

[0207] like Fig.23 As shown in the example in FIG. 1 , the energy management system 101 c is in a state where it can communicate with the facility 102 and the facility 103 .

[0208] Then, the energy management system 101c includes a vehicle information receiving unit 201, a vehicle information management unit 202, a schedule management unit 203, a facility information management unit 204 for managing facility information, a charge and discharge plan formulation unit 205, a charge and discharge plan notification unit 206, a presentation charge and discharge plan formulation unit 211 and a usage schedule presentation unit 212.

[0209] First, the charge-discharge plan formulation unit 211 for presentation will be described. The charge-discharge plan formulation unit 211 for presentation changes the scheduled departure time or the scheduled arrival time within a possible range while taking into account the travel time between facilities, based on the usage schedule set by the EV user (including the scheduled arrival time, the scheduled departure time, the scheduled arrival facility or the required power, etc.). Then, the charge-discharge plan formulation unit 211 for presentation formulates the charge-discharge plan at each time at each scheduled connection facility in this case.

[0210] Here, a charge and discharge plan formulation unit 211 is presented, which formulates a charge and discharge plan based on at least one of the changed scheduled arrival time and the scheduled departure time so as to minimize the value obtained by subtracting the total discharge profit generated by discharging the batteries at facilities 102 and 103 from the total charging cost generated by charging the batteries at facilities 102 and 103.

[0211] Then, the presentation charge and discharge plan formulation unit 211 calculates the total power cost due to charge and discharge in this case, and determines whether it is lower than the total power cost due to charge and discharge according to the charge and discharge plan formulated by the charge and discharge plan formulation unit 205 .

[0212] Then, when the total power cost of the charge and discharge plan prepared by the presentation charge and discharge plan preparation unit 211 is low, the presentation charge and discharge plan preparation unit 211 temporarily stores the total power cost corresponding to the charge and discharge plan.

[0213] Then, the charge and discharge plan making unit 211 is presented to change the scheduled departure time or the scheduled arrival time again, and repeat the process of making the charge and discharge plan. In addition, as the number of times of repeatedly making the charge and discharge plan, all changes that can be changed during the plan making period can be made, and the charge and discharge plan corresponding to each change can be made, and the corresponding total power cost can be calculated. Alternatively, after limiting the range of the time that can be changed (for example, within two hours), the scheduled departure time or the scheduled arrival time can be changed within the range and the charge and discharge plan can be made, and the corresponding total power cost can be calculated.

[0214] Fig.24 This is a flowchart showing an example of the processing flow of the presentation charge and discharge plan creation unit 211.

[0215] First, the presentation charging and discharging plan formulation unit 211 obtains the usage schedule set by the EV user (for example, Fig.16 Usage schedule shown)( Fig.24 Step ST1 in ).

[0216] Next, the charge and discharge plan (for example, Fig.11 or Fig.13 The charge and discharge schedule shown) Fig.24 In addition, although the present embodiment includes a charge and discharge plan formulation unit 205, it is also possible to present, for example, a charge and discharge plan formulation unit 211 obtained by the charge and discharge plan formulation unit 205a or the charge and discharge plan formulation unit 205b using the method shown in each corresponding embodiment.

[0217] Next, the presentation charging and discharging plan formulation unit 211 obtains the power price information of each facility at each time (for example, Figure 6 , Figure 7 , Fig. 9 and Fig.10 The unit price of electricity purchase and sales shown) Fig.24 Step ST3 in the process).

[0218] Next, the presentation charge and discharge plan preparation unit 211 calculates the total power cost ( ) due to charge and discharge of the charge and discharge plan prepared by the charge and discharge plan preparation unit 205 based on the information obtained in step ST2 and step ST3. Fig.24 In order to calculate the total electricity cost, for example, equation (6) is used.

[0219] Next, the usage schedule of EV 105 acquired in step ST1 is changed by the charge and discharge plan preparation unit 211 ( Fig.24 Step ST5 in the process).

[0220] Fig.25 , Fig.26 and Fig. 27 FIG. 2 is a diagram showing an example of a change in the usage schedule performed by the presentation charging and discharging plan preparation unit 211. Fig.25 , Fig.26 and Fig. 27 In FIG. 1 , the state in which EV 105 is connected to the facility is shown in black.

[0221] Fig.25 The example shown is a usage schedule before the change when the charge and discharge plan is made at 17:00. Fig.26 The example shown is Fig.25 The usage schedule shown is a usage schedule when the scheduled arrival time at the facility 1 is changed from 18:00 to 19:00.

[0222] in addition, Fig. 27 The example shown is Fig.25 The scheduled departure time at Facility 1 in the usage schedule shown is changed from 7:00 to 6:00 and Fig.25 The usage schedule shown is a usage schedule when the scheduled arrival time at the facility 2 is changed from 8:00 to 7:00.

[0223] In addition, if Fig. 27 As shown in the example in , when changing the schedule, since the travel time between facilities needs to be considered when changing the scheduled departure time, the next scheduled arrival time is also changed. Similarly, when changing the scheduled arrival time, the travel time between facilities is considered, and the previous scheduled departure time is also changed.

[0224] Next, the presentation charge and discharge plan preparation unit 211 prepares a charge and discharge plan ( Fig.24 In addition, the charge and discharge plan is prepared by the same method as that of the charge and discharge plan preparation unit 205.

[0225] Next, the presentation charge and discharge plan preparation unit 211 calculates the total power cost ( ) due to the charge and discharge of the EV battery based on the charge and discharge plan prepared in step ST6 and the power price information (power purchase price and power sales price) of each facility at each time obtained in step ST2. Fig.24 Step ST7 in the process.

[0226] Next, the presentation charge and discharge plan formulation unit 211 compares the total power cost calculated in step ST4 with the total power cost calculated in step ST7 ( Fig.24 Step ST8 in the process).

[0227] Then, the presentation charge and discharge plan formulation unit 211 determines whether the total power cost calculated in step ST7 is lower than the total power cost calculated in step ST4 ( Fig.24 Step ST9 in the process).

[0228] If the total power cost calculated in step ST7 is lower than the total power cost calculated in step ST4, that is, Fig.24 If the answer to the branch of step ST9 shown in the example above is "Yes", the process proceeds to Fig.24 Step ST10 shown in the example.

[0229] On the other hand, if the total power cost calculated in step ST7 is not higher than the total power cost calculated in step ST4, that is, Fig.24 If the answer to the "No" branch of step ST9 shown in the example above corresponds to the above, proceed to Fig.24 Step ST11 shown in the example.

[0230] In step ST10 , the usage schedule changed in step ST5 , the charge and discharge plan prepared in step ST6 , and the total power cost calculated in step ST7 are stored. Then, the process proceeds to step ST11 .

[0231] In step ST11, it is determined whether a charge and discharge plan is prepared under all conditions. Fig.24 If the answer to the branch "Yes" of step ST11 shown in the example in FIG. 1 corresponds to, the operation is terminated. On the other hand, if the charge and discharge plan has not been formulated under all conditions, that is, Fig.24 If the answer to the branch of step ST11 shown in the example is "No", the system returns to Fig.24 Step ST5 shown in the example.

[0232] In addition, the condition for ending the work may be to determine whether the changes to all conditions (situations) are complete, or to predetermine a range of time that can be changed (for example, two hours) and end the work when the changes to all situations within the range are complete.

[0233] Fig.28 , Fig.29 , Fig.30 , Fig.31 and Fig.32This is a diagram showing an example of a change in the usage schedule performed by the presentation charge and discharge plan creation unit 211 . Fig.28 , Fig.29 , Fig.30 , Fig.31 and Fig.32 The example shown is an example in which the range in which the usage schedule can be changed is set to two hours. Fig.28 , Fig.29 , Fig.30 , Fig.31 and Fig.32 In FIG. 1 , the state in which EV 105 is connected to the facility is shown in black.

[0234] Fig.28 The example shown is Fig.25 The usage schedule shown is a usage schedule when the scheduled arrival time at the facility 1 is changed from 18:00 to 17:00.

[0235] in addition, Fig.29 The example shown is Fig.25 The scheduled departure time at Facility 1 in the usage schedule shown is changed from 7:00 to 8:00 and Fig.25 The usage schedule shown is a usage schedule when the scheduled arrival time at the facility 2 is changed from 8:00 to 9:00.

[0236] in addition, Fig.30 The example shown is Fig.25 The scheduled departure time at Facility 1 in the usage schedule shown is changed from 7:00 to 9:00 and Fig.25 The usage schedule shown is a usage schedule when the scheduled arrival time at the facility 2 is changed from 8:00 to 10:00.

[0237] in addition, Fig.31 The example shown is Fig.25 The scheduled arrival time at facility 1 in the usage schedule shown is changed from 18:00 to 17:00. Fig.25 The scheduled departure time at Facility 1 in the usage schedule shown is changed from 7:00 to 8:00 and Fig.25 The usage schedule shown is a usage schedule when the scheduled arrival time at the facility 2 is changed from 8:00 to 9:00.

[0238] in addition, Fig.32 The example shown is Fig.25 The scheduled arrival time at facility 1 in the usage schedule shown is changed from 18:00 to 17:00. Fig.25 The scheduled departure time at Facility 1 in the usage schedule shown is changed from 7:00 to 9:00 and Fig.25 The usage schedule shown is a usage schedule when the scheduled arrival time at the facility 2 is changed from 8:00 to 10:00.

[0239] Next, the usage schedule presentation unit 212 is described. The usage schedule presentation unit 212 notifies the EV user of the changed scheduled departure time, the changed scheduled arrival time, the changed total electricity cost, and the total electricity cost based on the usage schedule set by the EV user, which are saved as the changed usage schedule in the presentation charging and discharging plan formulation unit 211.

[0240] As a method of notifying the EV user, for example, there is a method of notifying the EV user through a mobile terminal. In addition, regarding the usage schedule to be notified, only the lowest total power cost among the usage schedules stored in the presentation charge and discharge plan formulation unit 211 may be presented, all usage schedules stored in the presentation charge and discharge plan formulation unit 211 may be presented, or only the top usage schedules in ascending order of total power cost among the usage schedules stored in the presentation charge and discharge plan formulation unit 211 may be presented.

[0241] Fig.33 FIG. 4 is a diagram showing an example of a usage schedule presented to an EV user. Fig.33 As shown in the example in , the presented usage schedule includes the name of the EV, the expected arrival date, the expected arrival time, the expected departure date, the expected departure time, the expected arrival facility, the total electricity cost based on the usage schedule set by the EV user, the total electricity cost based on the changed usage schedule, and the difference before and after the change.

[0242] exist Fig.33 In the example, as the changed schedule for vehicle 1, a schedule in which the scheduled arrival date is "2018 / 9 / 6", the scheduled arrival time is "19:00", the scheduled departure date is "2018 / 9 / 7", the scheduled departure time is "07:00", and the scheduled arrival facility is "Facility 1" and a schedule in which the scheduled arrival date is "2018 / 9 / 7", the scheduled arrival time is "08:00", the scheduled departure date is "2018 / 9 / 7", the scheduled departure time is "18:00", and the scheduled arrival facility is "Facility 2" are shown, and the total electricity cost based on the usage schedule before the change is "300 yen", the total electricity cost based on the usage schedule after the change is "250 yen", and the difference before and after the change of the usage schedule is "50 yen".

[0243] Then, when the EV user who has received the presentation of the usage schedule changes the schedule to execute the presented usage schedule and charging and discharging plan, the EV user changes the schedule using the dedicated application or the like used when setting the usage schedule.

[0244] The energy management system 101c described above can present a usage schedule that can reduce the total electricity cost compared to the total electricity cost based on the usage schedule set by the EV user, thereby improving the convenience of the EV user.

[0245] <About the hardware structure of the energy management system>

[0246] Fig.34 and Fig.35 To briefly illustrate the actual operation Fig.36 FIG. 4 is a diagram of the hardware structure of the energy management system illustrated in FIG.

[0247] also, Fig.34 and Fig.35 The hardware structure and Fig.36 The structures illustrated in the examples sometimes do not match in number etc. This is due to Fig.36 The structures illustrated in the examples show the conceptual units that result.

[0248] Therefore, it is at least conceivable Fig.36 The structure illustrated in the example includes Fig.34 and Fig.35 The multiple hardware configurations illustrated in the example and Fig.36 The structure and Fig.34 and Fig.35 The case corresponding to a part of the hardware structure illustrated in the example can also be imagined Fig.34 and Fig.35 The hardware structure illustrated in the example has Fig.36 The case of multiple structures is illustrated in FIG.

[0249] in addition, Fig.34 and Fig.35 The hardware structure illustrated in the example is to Fig.36 The conceptual structure of the energy management system illustrated in the example is concretely illustrated. Fig.34 and Fig.35 In addition to the hardware configuration corresponding to the conceptual configuration of the energy management system, a new hardware configuration may be added. However, the energy management system according to the present embodiment can be established even without the newly added hardware configuration.

[0250] exist Fig.34 As a tool for implementing Fig.36 The charge and discharge plan formulation unit 1002, Figure 1 The charge and discharge plan formulation unit 205, Fig.15 The charge and discharge plan formulation unit 205a and the power consumption calculation unit 207, Fig.18The charge and discharge plan formulation unit 205b, the facility power forecasting unit 209 and the power price determination unit 210, Fig.23 The hardware configuration of the charge / discharge plan preparation unit 211 and the usage schedule presentation unit 212 shows a processing circuit 1102A for performing calculations and a storage device 1103 capable of storing information. These configurations are also the same in other embodiments.

[0251] exist Fig.35 As a tool for implementing Fig.36 The charge and discharge plan formulation unit 1002, Figure 1 The charge and discharge plan formulation unit 205, Fig.15 The charge and discharge plan formulation unit 205a and the power consumption calculation unit 207, Fig.18 The charge and discharge plan formulation unit 205b, the facility power forecasting unit 209 and the power price determination unit 210, Fig.23 The hardware configuration of the charge / discharge plan preparation unit 211 and the usage schedule presentation unit 212 shows a processing circuit 1102B that performs calculations. This configuration is also the same in other embodiments.

[0252] Figure 1 The vehicle information management unit 202, the timetable management unit 203 and the facility information management unit 204, Fig.18 The measured value management unit 208 is implemented by the storage device 1103 or another storage device (not shown here).

[0253] The storage device 1103 may be, for example, a hard disk drive (HDD), a random access memory (RAM), a read only memory (ROM), a flash memory, an erasable programmable read only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or other volatile or non-volatile semiconductor memory, or a memory (storage medium) including a magnetic disk, a floppy disk, an optical disk, a compact disk, a mini disk, or a DVD, or all storage media to be used in the future.

[0254] The processing circuit 1102A may be a unit that executes a program stored in the storage device 1103, an external CD-ROM, an external DVD-ROM, or an external flash memory, etc. That is, it may be, for example, a central processing unit (CPU), a microprocessor, a microcomputer, or a digital signal processor (DSP).

[0255] In the case where the processing circuit 1102A is a unit that executes a program stored in the storage device 1103, an external CD-ROM, an external DVD-ROM, or an external flash memory, the corresponding processing is implemented by software, firmware, or a combination of software and firmware in which the processing circuit 1102A executes the program stored in the storage device 1103. In addition, the corresponding processing may also be implemented by, for example, a plurality of processing circuits working together.

[0256] Software and firmware may be described as programs and stored in the storage device 1103. In this case, the processing circuit 1102A implements the above functions by reading and executing the programs stored in the storage device 1103. That is, the storage device 1103 may be a unit that stores the programs that are executed by the processing circuit 1102A to thereby implement the above functions.

[0257] In addition, the processing circuit 1102B may be dedicated hardware, that is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a combination thereof.

[0258] When the processing circuit 1102B is dedicated hardware, the above corresponding processing is implemented by the operation of the processing circuit 1102B. In addition, the above corresponding processing can be implemented by separate circuits or by a single circuit.

[0259] Furthermore, the above-described corresponding processing may be partially implemented in the processing circuit 1102A as a unit that executes a program stored in the storage device 1103 , and partially implemented in the processing circuit 1102B as dedicated hardware.

[0260] <Effects of the above-described embodiments>

[0261] Next, examples of the effects produced by the above-described embodiments are shown. In addition, in the following description, the effects are described based on the specific structures shown in the examples in the above-described embodiments, but other specific structures shown in the examples in the present application specification may be substituted within the scope of producing the same effects.

[0262] In addition, this substitution can be performed across multiple embodiments. In other words, it is possible to combine various structures shown as examples in different embodiments to produce the same effect.

[0263] According to the above-described embodiment, an energy management system for managing the charging and discharging of a battery of a vehicle equipped with a battery (e.g., EV105) includes a schedule management unit 203 (or a schedule management unit 203a) and a charge and discharge plan formulation unit 205 (or a charge and discharge plan formulation unit 205a, a charge and discharge plan formulation unit 205b). The schedule management unit 203 manages a schedule for EV105 to move from a first facility, which is a facility where the battery can be charged and discharged, to a second facility, which is a facility where the battery can be charged and discharged. Here, the first facility corresponds to, for example, facility 102 or facility 103. In addition, the second facility corresponds to, for example, facility 103 or facility 102. The charge and discharge plan formulation unit 205 formulates a first charge and discharge plan, which is a plan for charging and discharging the battery in each of facilities 102 and 103. Here, the charge and discharge plan preparation unit 205 prepares the first charge and discharge plan so that the storage battery in the facility 102 is discharged while leaving the power for the EV 105 to move from the facility 102 to the facility 103 , that is, the travel power (that is, the required amount of power).

[0264] According to the above-described embodiment, the energy management system includes a processing circuit 1102A that executes a program and a storage device 1103 that stores the executed program. Then, the following operations are realized by the processing circuit 1102A executing the program.

[0265] That is, a schedule for EV 105 to move from facility 102, which is a facility where storage batteries can be charged and discharged, to facility 103, which is a facility where storage batteries can be charged and discharged, is managed, and a first charge and discharge plan is prepared as a plan for charging and discharging storage batteries in each of facilities 102 and 103. Then, the first charge and discharge plan is prepared so that the storage batteries in facility 102 are discharged while leaving power for EV 105 to move from facility 102 to facility 103, i.e., travel power.

[0266] In addition, according to the above-described embodiment, the energy management system includes the processing circuit 1102B as dedicated hardware. Then, the processing circuit 1102B as dedicated hardware performs the following operations.

[0267] That is, the processing circuit 1102B as dedicated hardware manages the schedule for the movement of EV 105 from facility 102, which is a facility where the storage battery can be charged and discharged, to facility 103, which is a facility where the storage battery can be charged and discharged, and formulates a first charge and discharge plan as a plan for charging and discharging the storage battery in each of facilities 102 and 103. Then, the first charge and discharge plan is formulated so that the storage battery in facility 102 is discharged while leaving power for the movement of EV 105 from facility 102 to facility 103, that is, travel power.

[0268] According to such a configuration, a charge and discharge plan can be prepared when a vehicle having a storage battery can be charged and discharged at multiple facilities. According to the charge and discharge plan, it is possible to obtain a discharge profit due to discharge while ensuring the travel power for moving between multiple facilities.

[0269] In addition, the same effect can be produced even when at least one of the structures other than those shown in the examples in the specification of this application is appropriately added to the structure recorded above, that is, when a structure other than those shown in the examples in the specification of this application that is not mentioned as the structure recorded above is appropriately added.

[0270] In addition, according to the above-described embodiment, the energy management system includes a facility information management unit 204 (or a facility information management unit 204b) that manages information including the unit price of electricity at each time of the facility 102 and the facility 103, that is, the unit price of electricity information. Then, the charge and discharge plan formulation unit 205 formulates the first charge and discharge plan based on the unit price of electricity so that the value obtained by subtracting the total discharge profit generated by the discharge of the storage batteries in the facilities 102 and the facilities 103 from the total charging cost generated by the charging of the storage batteries in the facilities 102 and the facilities 103 is minimized. According to such a structure, it is possible to suppress the total power cost while ensuring the mobile power for moving between multiple facilities while taking into account the difference in the unit price of electricity between multiple facilities. Specifically, by discharging the power charged at a low price at a higher price, a charge and discharge plan is formulated in which the profit brought by the difference between the price at the time of charging and the price at the time of discharging is maximized, thereby reducing the total power cost of the EV user due to charging and discharging.

[0271] In addition, according to the above-described embodiment, the energy management system includes a power forecasting unit and a power price determination unit 210. Here, the power forecasting unit corresponds to, for example, the facility power forecasting unit 209. The facility power forecasting unit 209 forecasts the power demand of each facility 102 and the facility 103. In addition, the power price determination unit 210 determines the power price based on the power demand. According to such a structure, the power price can be determined based on the power demand, so that a highly accurate charging and discharging plan can be formulated.

[0272] In addition, according to the above-described embodiment, the facility power prediction unit 209 predicts power demand based on the power consumption of equipment installed in each of the facilities 102 and 103 and the power generation of renewable energy equipment installed in at least one of the facilities 102 and 103. According to such a structure, the unit price of electricity can be determined based on the power consumption of each facility and the power generation of renewable energy equipment installed in each facility.

[0273] In addition, according to the above-described embodiment, the schedule management unit 203 manages the scheduled arrival time, which is the scheduled time for EV 105 to arrive at each of the facilities 102 and 103, and the scheduled departure time, which is the scheduled time for EV 105 to depart from each of the facilities 102 and 103. According to such a structure, a charge and discharge plan can be prepared when a vehicle having a storage battery can be charged and discharged at multiple facilities. According to the charge and discharge plan, it is possible to obtain a discharge profit due to discharge while ensuring the travel power for moving between multiple facilities.

[0274] In addition, according to the above-described embodiment, the energy management system includes a power calculation unit. Here, the power calculation unit corresponds to, for example, the power consumption calculation unit 207. The power consumption calculation unit 207 calculates the mobile power based on at least the scheduled departure time of the facility 102 and the scheduled arrival time of the facility 103. Then, the charge and discharge plan formulation unit 205a formulates a first charge and discharge plan in such a way that the battery in the facility 102 leaves the mobile power calculated by the power consumption calculation unit 207 and discharges. According to such a structure, since the burden of the EV user caused by the setting of the schedule (specifically, the calculation of the mobile power) can be reduced, the convenience of the user can be improved.

[0275] In addition, according to the above-described embodiment, the energy management system includes a schedule changing unit, an electricity cost calculating unit, and a schedule presenting unit. Here, the schedule changing unit corresponds to, for example, the charge and discharge plan formulation unit 211 for presentation. In addition, the electricity cost calculating unit corresponds to, for example, the charge and discharge plan formulation unit 211 for presentation. In addition, the schedule presenting unit corresponds to, for example, the usage schedule presenting unit 212. The charge and discharge plan formulation unit 211 for presentation changes at least one of the scheduled arrival time and the scheduled departure time managed by the schedule management unit 203. The charge and discharge plan formulation unit 211 for presentation formulates the second charge and discharge plan based on at least one of the changed scheduled arrival time and the scheduled departure time, so that the total discharge profit generated by the discharge of the storage batteries in the facilities 102 and 103 is minimized from the total charging cost generated by the charging of the storage batteries in the facilities 102 and 103. The charge and discharge plan formulation unit 211 for presentation calculates the total electricity cost of the formulated first charge and discharge plan and the second charge and discharge plan, respectively. When the total electricity cost of the second charging and discharging plan is lower than the total electricity cost of the first charging and discharging plan, the usage schedule presentation unit 212 presents a schedule corresponding to the second charging and discharging plan. According to such a configuration, by presenting a usage schedule that can reduce the total electricity cost compared to the total electricity cost of the usage schedule set by the EV user, the total electricity cost due to charging and discharging of the EV user can be further reduced.

[0276] In addition, according to the above-described embodiment, the energy management system includes a vehicle information management unit 202. The vehicle information management unit 202 manages information including the storage capacity of the battery, the chargeable and dischargeable capacity of the battery, and the charge and discharge efficiency of the battery, that is, vehicle information. Then, the charge and discharge plan formulation unit 205 formulates a first charge and discharge plan based on the vehicle information in such a way that the value obtained by subtracting the total discharge profit generated by discharging the batteries at the facilities 102 and 103 from the total charging cost generated by charging the batteries at the facilities 102 and 103 is minimized. According to such a structure, a charge and discharge plan can be formulated when a vehicle with a battery can be charged and discharged at multiple facilities. According to the charge and discharge plan, it is possible to obtain a discharge profit generated by discharging while ensuring the mobile power for moving between multiple facilities.

[0277] According to the above-described embodiment, the energy management system includes the charge and discharge plan notification unit 206 for notifying the prepared first charge and discharge plan. With such a configuration, the EV user can know the charge and discharge plan at the EV 105 or each facility, which is convenient.

[0278] According to the above-described embodiment, in the energy management method for managing the charging and discharging of the storage battery of the EV 105 equipped with the storage battery, the schedule for the movement of the EV 105 from the facility 102, which is a facility where the storage battery can be charged and discharged, to the facility 103, which is a facility where the storage battery can be charged and discharged, is managed. Then, a first charging and discharging plan is prepared as a plan for charging and discharging the storage battery in each of the facilities 102 and 103. Here, the first charging and discharging plan is prepared so that the storage battery in the facility 102 is discharged while leaving the power for the movement of the EV 105 from the facility 102 to the facility 103, that is, the moving power.

[0279] According to such a configuration, a charge and discharge plan can be prepared when a vehicle having a storage battery can be charged and discharged at multiple facilities. According to the charge and discharge plan, it is possible to obtain a discharge profit due to discharge while ensuring the travel power for moving between multiple facilities.

[0280] In addition, the same effect can be produced even when at least one of the structures other than those shown in the examples in the specification of this application is appropriately added to the structure recorded above, that is, when a structure other than those shown in the examples in the specification of this application that is not mentioned as the structure recorded above is appropriately added.

[0281] Furthermore, the order in which each process is performed can be changed without particular limitation.

[0282] <Regarding Modifications of the Embodiments Described Above>

[0283] In the above-described embodiments, although the material, size, shape, relative configuration relationship or implementation conditions of each component are sometimes described, these are merely examples in all aspects and are not limited to the contents described in the specification of this application.

[0284] Therefore, numerous variations and equivalents not shown in the examples are contemplated within the scope of the technology disclosed in the present specification, including, for example, the case where at least one constituent element is deformed, added, or omitted, and the case where at least one constituent element in at least one embodiment is extracted and combined with constituent elements in other embodiments.

[0285] Furthermore, in the above-described embodiments, a component described as being provided with “one” may be provided with “one or more” unless a contradiction occurs.

[0286] Furthermore, each constituent element in the embodiments described above is a conceptual unit, and within the technical scope disclosed in the present application specification, includes a case where one constituent element is composed of multiple structures, a case where one constituent element corresponds to a part of a certain structure, and a case where multiple constituent elements are included in one structure.

[0287] In addition, as long as the respective components in the above-described embodiments exhibit the same functions, structures having other structures or shapes are included.

[0288] In addition, the descriptions in the specification of the present application are referenced for all purposes related to the present technology and are not regarded as prior art.

[0289] In addition, each component described in the above-described embodiments may be conceived as software or firmware, or as corresponding hardware. Under these two concepts, each component is referred to as a "unit" or a "processing circuit" or the like.

[0290] Furthermore, the technology disclosed in the present specification may be provided in a dispersed manner in a plurality of devices, that is, may be in the form of a system.

Claims

1. An energy management system for managing the charging and discharging of a battery in a vehicle equipped with the battery, the energy management system comprising: a schedule management unit that manages a schedule for the vehicle to move from a first facility, which is a facility at which the storage battery can be charged and discharged, to a second facility, which is a facility at which the storage battery can be charged and discharged; and a charge-discharge plan formulation unit that formulates a first charge-discharge plan as a plan for charging and discharging the storage battery in each of the first facility and the second facility, The charge / discharge plan formulation unit formulates the first charge / discharge plan so that the storage battery is discharged at the first facility while leaving power for the vehicle to move from the first facility to the second facility, that is, travel power. The schedule management unit manages the scheduled arrival time, which is the scheduled time when the vehicle arrives at each of the first facility and the second facility, and the scheduled departure time, which is the scheduled time when the vehicle departs from each of the first facility and the second facility, wherein: The energy management system further includes a schedule changing unit that changes at least one of the scheduled arrival time and the scheduled departure time managed by the schedule management unit. wherein the schedule changing unit formulates a second charging and discharging plan based on at least one of the changed scheduled arrival time and the scheduled departure time in such a manner as to minimize a value obtained by subtracting a total discharge profit generated by discharging the storage batteries at the first facility and the second facility from a total charging cost generated by charging the storage batteries at the first facility and the second facility, The energy management system also features: an electricity cost calculation unit that calculates the total electricity cost of the first charging and discharging plan and the second charging and discharging plan that are formulated; and The schedule presenting unit presents the schedule corresponding to the second charge and discharge plan when the total power cost of the second charge and discharge plan is lower than the total power cost of the first charge and discharge plan.

2. The energy management system according to claim 1, wherein: further comprising a power calculation unit that calculates the travel power based on at least the scheduled departure time of the first facility and the scheduled arrival time of the second facility, The charge and discharge plan formulation unit formulates the first charge and discharge plan so that the storage battery is discharged at the first facility while retaining the mobile power calculated by the power calculation unit.

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