JP2012123637A - Charge controller, control method of charge controller, charge/discharge controller, control method of charge/discharge controller, control program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control charge/discharge of an electric automobile so as to suppress a household electricity charge as much as possible by considering power supplied from a power supply source other than system power supply.SOLUTION: A charge/discharge controller includes: a data acquisition part 21 for acquiring the power storage amount of a battery 34 of an electric automobile 3, destination related information related to a destination, and the departure time; a charge/discharge amount calculation part 22 for determining the next estimated power consumption of the electric automobile 3 on the basis of the destination related information and the departure time, and determining a target charging amount on the basis of the power storage amount of the battery 34 and the estimated power consumption; a charge/discharge plan preparation part 23 for determining the charging period of each power supply source so as to charge the target charging amount by the next departure time of the electric automobile 3 and so as to charge preferentially from the power supply source which supplies the power of a low power unit price among the power supply sources; and a charge/discharge control part 25 for executing control to charge the target charging amount to the battery 34 from the respective power supply sources according to the charging period of the respective power supply sources.

Description

  The present invention relates to a charge control device that controls charge / discharge for a vehicle equipped with a power storage device, a control method for the charge control device, a charge / discharge control device, a control method for the charge / discharge control device, a control program, and a recording medium. is there.

  In recent years, in response to growing environmental awareness, vehicles with low carbon dioxide emissions, such as electric vehicles equipped with batteries (power storage devices) and motors as drive devices, and plug-in hybrid vehicles (PHV), have become widespread. I'm starting.

  An electric vehicle and a PHV can charge a battery using a household power source. The amount of electric power required for charging an electric vehicle is very large compared to other devices such as an air conditioner, a refrigerator, and a television set in the home. For this reason, it is important for households that own an electric vehicle to reduce the electricity charges on the electric vehicle.

  Therefore, it is desirable to charge the electric vehicle in a time zone where the electricity charge set by the electric power company is low. For example, Patent Document 1 describes a charging device that charges an electric vehicle using as cheap an electric power as possible.

JP 2010-142025 A (released on June 24, 2010)

  In recent years, since electricity charges can be reduced and environmental loads can be reduced, an increasing number of households have installed power generation devices that generate electricity and storage batteries that store electric power. Such homes generate or store electricity at an electricity rate that is equal to or less than that purchased from an electric power company during times when electricity rates are cheap.

  In the above Patent Document 1, since electric power generated at home and electric power stored are not taken into consideration, there are cases where the electricity rate cannot be effectively suppressed in the home in consideration of the above environment.

  Moreover, the technique of Patent Document 1 is based on the viewpoint of charging an electric vehicle with as low power as possible, and it is not considered to effectively utilize the extra power held by the electric vehicle. That is, the battery included in the electric vehicle is not considered as a power storage device that supplies power to other devices in the home.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to take into consideration the power supplied from a power supply source other than the system power supply so as to suppress the electricity bill at home as much as possible. A charge control device that controls charging / discharging, a control method for the charge control device, a charge / discharge control device, a control method for the charge / discharge control device, a control program, and a recording medium.

  In order to solve the above problems, a charging control device according to the present invention is a charging control device that controls charging of a power storage device provided in a vehicle, and a date and time when a user departs toward a destination and an object related to the destination Input means for inputting location-related information; amount of power stored in the power storage device from the vehicle; departure date and time input to the input means; and data acquisition means for acquiring the destination-related information; and the data acquisition means Based on the acquired departure date and destination-related information, the predicted power consumption determining means for determining the predicted power consumption of the next vehicle, the power storage amount of the power storage device acquired by the data acquisition means, and the predicted power consumption A charge amount determining means for determining a target charge amount based on the predicted power consumption determined by the determining means, and the target charge amount determined by the charge amount determining means for the next vehicle output. Charging each power supply source so that it is charged by the date and time, and is preferentially charged from the power supply source that supplies power with a lower power unit price among the power supply sources that supply power to the power storage device. Charge plan creation means for determining a period, and charge control means for controlling the power storage device to charge the target charge amount from each power supply source according to the charge period of each power supply source determined by the charge plan creation means It is characterized by comprising.

  In order to solve the above-described problem, a control method for a charge control device according to the present invention is a control method for a charge control device that controls charging of a power storage device provided in a vehicle. And an input step of inputting destination related information regarding the destination, a data acquisition step of acquiring the storage amount of the power storage device from the vehicle, the departure date and time input in the input step, and the destination related information; Based on the departure date and time and destination related information acquired in the data acquisition step, an expected power consumption determination step for determining an expected power consumption of the next vehicle, and the power storage device acquired in the data acquisition step The target charge amount is determined based on the stored power amount and the predicted power consumption determined in the predicted power consumption determination step. A charge amount determination step to be performed, and among the power supply sources that supply the power to the power storage device so that the target charge amount determined in the charge amount determination step is charged by the next vehicle departure date and time. A charging plan creation step for determining a charging period of each power supply source so as to preferentially charge from a power supply source that supplies power with a low unit price, and charging of each power supply source determined in the charging plan creation step A charge control step of controlling the power storage device to charge the target charge amount from each power supply source according to a period.

  According to the above configuration, the predicted power consumption determination unit is configured to calculate the predicted power consumption amount of the next vehicle based on the destination related information regarding the destination acquired by the data acquisition unit and the date and time of departure for the destination. To decide. The charge amount determination unit determines a target charge amount based on the stored power amount of the power storage device acquired by the data acquisition unit and the predicted power consumption amount determined by the predicted power consumption determination unit. The charging plan creation means charges the target charge amount determined by the charge amount determination means by the departure date and time of the next vehicle, and is a power unit price among power supply sources that supply power to the power storage device. The charging period of each power supply source is determined so as to preferentially charge from the power supply source that supplies cheap power. Then, the charging control unit controls the power storage device to charge the target charging amount from each power supply source according to the charging period of each power supply source determined by the charging plan creation unit.

  Therefore, the charge amount (target charge amount) necessary for the vehicle in the next schedule can be charged with the lowest possible electricity charge by the next vehicle departure date and time. Therefore, there is an effect that the cost required for using the vehicle can be suppressed.

  In the charge / discharge control device according to the present invention, when the charge plan creation means includes the power supply source including a system power supply and a power storage device other than a power storage device included in a vehicle to be charged, the system power supply Therefore, it is preferable to prioritize power storage devices other than the power storage device included in the vehicle to be charged.

  According to the above configuration, when the power supply source includes a power storage device other than a power storage device included in a vehicle to be charged, the power supply source is charged from the system power source. A power storage device other than the power storage device included in the target vehicle is given priority. Here, the electric power stored in the power storage device other than the power storage device included in the vehicle to be charged is generally the power that the system power supply supplies during a low-cost power period with a low electricity charge, and is installed in the home. Charging is performed using the power generated by the power generation device. In general, the power generated by the power generation device is cheaper than the power supplied by the system power supply during the low-cost period of low-cost electricity. Therefore, the power stored in the power storage device other than the power storage device included in the vehicle to be charged is equal to or cheaper than the power supplied by the system power supply during the low-cost power price period.

  In households, the power stored in power storage devices other than the power storage device provided in the vehicle to be charged is basically not costly when using the power, and if the power is not sold to the system power supply, Electricity that has no use other than being consumed by equipment. Therefore, by giving priority to the power storage device other than the power storage device included in the vehicle to be charged over the system power supply, electric power at home can be used without waste, and the charge amount required for the vehicle (target charge amount) ) Can be charged at the lowest possible electricity charge.

  Further, in the charge / discharge control device according to the present invention, the charging plan creation means includes a system power source included in the power supply source, and the power unit price is different for each time zone with respect to the power supplied by the system power source. When it is set, it is preferable to determine the charging period of the system power supply in preference to the time zone with a low power unit price.

  According to the above configuration, the charging plan creation means includes a system power supply included in the power supply source, and a different power unit price is set for each time zone with respect to the power supplied by the system power supply. The charging period of the system power supply is determined with priority given to the time zone where the power unit price is cheap. Therefore, the charge amount (target charge amount) necessary for the vehicle in the next schedule can be charged at a lower electric charge by the departure date and time of the next vehicle.

  In the charge / discharge control device according to the present invention, when the predicted power consumption determining unit acquires a plurality of the destination related information associated with the departure date and time, the data acquisition unit includes each destination related information. It is preferable to calculate the amount of power based on each and determine the maximum amount of power among the calculated amounts of power as the predicted power consumption.

  According to the above configuration, when the data acquisition unit acquires a plurality of the destination-related information associated with the departure date and time, the predicted power consumption determination unit determines the amount of power based on each destination-related information. And the maximum power amount among the calculated power amounts is determined as the predicted power consumption amount. That is, the predicted power consumption determining means sets the maximum power amount among the power amounts calculated based on each destination-related information as the predicted power consumption amount of the next vehicle. Then, the charge amount determining means determines a target charge amount based on the predicted power consumption, and the charge control means controls the power storage device to charge the target charge amount. In use, the possibility of power shortage can be reduced.

  A charge / discharge control device according to the present invention is a charge / discharge control device that controls charge / discharge of a power storage device provided in a vehicle in order to solve the above-described problem, and the user relates to destination-related information about a destination and the related information. Input means for inputting the date and time to depart to the destination; the amount of power stored in the power storage device from the vehicle; and the data acquisition means for acquiring the destination related information and the departure date and time input to the input means; Based on the destination-related information acquired by the data acquisition unit and the departure date and time, the predicted power consumption determining unit that determines the predicted power consumption of the next vehicle, and the predicted power consumption determined by the predicted power consumption determining unit If the amount of power stored in the power storage device acquired by the data acquisition unit is larger, the difference between the predicted power consumption and the power storage amount is calculated until the next vehicle departure date and time. On the other hand, when the stored power amount of the power storage device acquired by the data acquisition unit is smaller than the predicted power consumption determined by the predicted power consumption determination unit, the predicted power consumption and the Charge / discharge control means for controlling the amount of electric power that is the difference from the amount of stored electricity to be charged before the next vehicle departure date and time is provided.

  Moreover, in order to solve the said subject, the control method of the charging / discharging control apparatus which concerns on this invention is a control method of the charging / discharging control apparatus which controls charging / discharging of the electrical storage apparatus with which a vehicle is provided, Comprising: A user is related with the destination. An input step for inputting destination related information and a date and time to depart to the destination, an amount of power stored in the power storage device from the vehicle, and the destination related information and the departure date and time input in the input step are acquired. In the data acquisition step, the predicted power consumption determination step for determining the predicted power consumption amount of the next vehicle based on the destination related information and the departure date and time acquired in the data acquisition step, and the predicted power consumption determination step The power storage amount of the power storage device acquired in the data acquisition step is larger than the determined predicted power consumption amount. Control the electric energy of the difference between the predicted power consumption and the power storage amount to be discharged by the next vehicle departure date and time, on the other hand, from the predicted power consumption determined in the predicted power consumption determination step When the amount of power stored in the power storage device acquired in the data acquisition step is smaller, control is performed so that the difference between the predicted power consumption and the power storage amount is charged by the next vehicle departure date and time. And a charge / discharge control step.

  According to the above configuration, the predicted power consumption determination unit is configured to calculate the predicted power consumption amount of the next vehicle based on the destination related information regarding the destination acquired by the data acquisition unit and the date and time of departure for the destination. To decide. The charging control means, when the power storage amount of the power storage device acquired by the data acquisition means is larger than the expected power consumption determined by the expected power consumption determination means, the expected power consumption and the power storage amount, Of the power storage device obtained by the data acquisition unit from the predicted power consumption determined by the predicted power consumption determination unit. When the amount is smaller, control is performed so that the difference between the predicted power consumption and the amount of power storage is charged by the next vehicle departure date and time.

  Here, when the power storage amount of the power storage device is larger than the expected power consumption amount, the difference power amount between the predicted power consumption amount and the power storage amount among the power storage amount of the power storage device is the next vehicle It is an extra electric power when using. Therefore, by discharging this extra power by the departure date and time, the amount of power used from other power supply sources such as a system power supply is reduced, and the power stored in the power storage device is used effectively without waste. be able to. Therefore, the electricity bill at home can be suppressed as much as possible.

  Also, if the power storage amount of the power storage device is smaller than the expected power consumption, it is necessary to use only the difference between the predicted power consumption and the power storage amount at the next vehicle use. Can cover a lot of electricity. Therefore, by charging the shortage of power by the departure date and time, it is possible to charge only the charge amount (target charge amount) necessary for the vehicle in the next schedule. Therefore, there is an effect that the cost required for using the vehicle can be suppressed.

  The charge control device or the charge / discharge control device may be realized by a computer. In this case, the charge control device or the charge / discharge control device is operated by operating the computer as each unit of the charge control device. A control program for realizing the control device or the charge / discharge control device on a computer and a computer-readable recording medium on which the control program is recorded also fall within the scope of the present invention.

  As described above, the charge / discharge control device according to the present invention includes the input means for inputting the date and time when the user departs toward the destination and the destination related information regarding the destination, the amount of power stored in the power storage device from the vehicle, and The data acquisition means for acquiring the departure date and time and the destination related information input to the input means, and the expected power consumption of the next vehicle based on the departure date and time and the destination related information acquired by the data acquisition means The amount of charge for determining the target charge amount based on the predicted power consumption determining means for determining the power consumption amount of the power storage device acquired by the data acquisition means and the predicted power consumption amount determined by the predicted power consumption determination means Determining means and a power supply source for supplying power to the power storage device so that the target charge amount determined by the charge amount determining means is charged by the next vehicle departure date and time. Charging plan creation means for determining the charging period of each power supply source so as to preferentially charge from the power supply source that supplies power with a low unit price of power, and for each power supply source determined by the charging plan creation means According to the charging period, charging control means for controlling the power storage device to charge the target charging amount from each power supply source is provided.

  Further, the control method of the charge / discharge control device according to the present invention includes an input step of inputting a date and time when the user departs toward the destination and destination related information relating to the destination, a storage amount of the power storage device from the vehicle, and A data acquisition step for acquiring the departure date and time and the destination related information input in the input step, and an expected power consumption of the next vehicle based on the departure date and time and the destination related information acquired in the data acquisition step The target charge amount is determined based on the predicted power consumption determination step for determining the amount, the power storage amount of the power storage device acquired in the data acquisition step, and the predicted power consumption determined in the predicted power consumption determination step The charge amount determination step to be performed and the target charge amount determined in the charge amount determination step are output from the next vehicle. Charging each power supply source so that it is charged by the date and time, and is preferentially charged from the power supply source that supplies power with a lower power unit price among the power supply sources that supply power to the power storage device. A charging plan creation step for determining a period, and a charging control for controlling the power storage device to charge the power storage device from each power supply source according to the charging period for each power supply source determined in the charging plan creation step Steps.

  Therefore, the charge amount (target charge amount) required for the vehicle in the next schedule can be charged with the lowest possible electricity charge by the next vehicle departure date and time. Therefore, there is an effect that the cost required for using the vehicle can be suppressed.

It is a block diagram which shows the principal part structure of HEMS and the electric vehicle in embodiment which concerns on this invention. It is a figure which shows the outline | summary of the charging / discharging control system containing the said HEMS and an electric vehicle. It is a figure which shows an example of the schedule information which a user inputs into said HEMS. It is a figure which shows an example of the charging period which the charging / discharging plan preparation part of the said HEMS shows, (a) And (b) shows the case where a charging period contains a storage battery electric power feeding period and an inexpensive electric power feeding period, (c) Indicates a case where the charging period includes an inexpensive power feeding period and a normal power feeding period. It is a figure which shows an example of the information which the said HEMS hold | maintains, (a) shows an example of contract electric power information, (b) shows an example of charging / discharging capability information. It is a figure which shows an example of the information which the said electric vehicle hold | maintains, (a) shows an example of fuel consumption information, (b) shows an example of electrical storage amount information. It is a flowchart which shows an example of the charging / discharging control process which the said HEMS performs. It is a flowchart which shows an example of the charging / discharging plan preparation process which the charging / discharging plan preparation part of the said HEMS performs.

  An embodiment of the present invention will be described below with reference to FIGS. First, the outline | summary of the charging / discharging control system 1 of this embodiment is demonstrated based on FIG.

[Outline of charge / discharge control system 1]
FIG. 2 is a diagram showing an outline of the charge / discharge control system 1 according to the present embodiment. As shown in FIG. 2, the charge / discharge control system 1 includes a HEMS (Home Energy Management System: charge / discharge control device, charge control device) 2 and an electric vehicle (vehicle) 3. In addition to the HEMS 2 and the electric vehicle 3, the charge / discharge control system further includes a storage battery (power storage device, power supply source) 4, a home appliance 5, a power plant (system power supply, power supply source) 6, a power generation device (power supply source). ) 8 may be included. The electric vehicle 3 includes a battery (power storage device) 34 therein.

  The HEMS 2 and the electric vehicle 3 can be connected via the charge / discharge port 7. The charge / discharge port 7 includes a charge / discharge cable and a plug, and the HEMS 2 and the electric vehicle 3 are connected by inserting the plug into the electric vehicle 3. As illustrated, the battery 34 of the electric vehicle 3 is charged from the HEMS 2 or discharged from the battery 34 to the HEMS 2 through the charge / discharge port 7. Moreover, HEMS2 is connected with the storage battery 4, the household appliances 5, the electric power generating apparatus 8, and the power plant 6, respectively. In addition, the solid line arrow shown in FIG. 2 shows the flow of electricity between each apparatus.

  The HEMS 2 includes power consumption of the home appliance 5 that consumes power installed in the home, power stored in the storage battery 4 and the electric vehicle 3 that store power, power generated by the power generation device 8 that generates power, power generation The power supplied from the station 6 is managed. Specifically, the HEMS 2 distributes the grid power from the power plant 6 and the power generated by the power generator 8 to the electric vehicle 3, the storage battery 4, and the home appliance 5. In addition, the power stored in the battery 34 of the electric vehicle 3 is distributed to the storage battery 4 and the home appliance 5.

  Further, the HEMS 2 controls charging / discharging of the storage battery 4 in consideration of the amount of power generated by the power generation device 8 and the electricity bill purchased from the power company (power plant 6). Further, the HEMS 2 monitors the power consumption of the home appliance 5 and controls the operation / stop of the home appliance 5 to optimize the power consumption. The HEMS 2 controls charging / discharging of the electric vehicle 3. Details of the charge / discharge control of the electric vehicle by the HEMS 2, which is a feature of the present invention, will be described later.

  That is, the HEMS 2 collects and distributes power to the connected device, acquires data from the connected device, and controls the operation of the device.

  The HEMS 2 charges the battery of the electric vehicle 3 via the charging / discharging port 7. In the present embodiment, data exchange with the electric vehicle 3 is further possible via the charging / discharging port 7. However, the exchange of data between the HEMS 2 and the electric vehicle 3 is not limited to this method. For example, the HEMS 2 and the electric vehicle 3 may be connected by another cable different from the charge / discharge port 7, the HEMS 2 and the electric vehicle 3 may be connected wirelessly, or recording on a memory card or the like Data may be moved using a medium.

  The electric vehicle 3 is a vehicle that is equipped with a power storage device and runs by rotating an electric motor with electricity stored in the power storage device. However, the present invention is not limited to this, and the electric vehicle 3 may be a vehicle (vehicle) equipped with a power storage device that can be charged by a household power source, such as a plug-in hybrid vehicle. In the example shown in FIG. 2, the charge / discharge control system 1 includes one electric vehicle 3, but the charge / discharge control system 1 may include a plurality of electric vehicles 3. That is, the HEMS 2 may be connected to the plurality of electric vehicles 3 and the charge / discharge of the batteries 34 of the plurality of electric vehicles 3 may be controlled.

  The power plant 6 is managed by an electric power company and supplies grid power to consumers such as homes and business establishments. The consumer contracts with the electric power company for the charge of electric power and the amount of electric power to be supplied. In general, an electric power company sets an electric charge that is lower than that of the daytime for the grid power supplied in the midnight time zone. In the present invention, a time zone in which the electricity bill is cheaper than the other time zones is referred to as a power inexpensive period. Further, in the present embodiment, the power inexpensive period is from 23:00 to 7:00 on the next day. Further, in the present embodiment, it is assumed that the consumer contracts with the electric power company at a contracted power amount of 5 kW (50 A). However, the above-described cheap power period and contract power amount are examples, and are not limited thereto.

  The storage battery 4 stores the grid power from the power plant 6 and the power generated by the power generator 8. When the grid power is used, the storage battery 4 is basically controlled by the HEMS 2 so as to perform power storage using the grid power supplied during the low-cost power period. In addition, the power generated by the power generation device 8 is basically the same as or cheaper than the system power supplied from the power plant 6 during the power cheap period. That is, the power stored in the storage battery 4 is equal to or less expensive than the system power supplied from the power plant 6 during the power cheap period.

  In the present embodiment, the electric power stored in the storage battery 4 is assumed to be electric power whose electric power unit price is lower than that of the system electric power supplied from the power plant 6 during the electric power inexpensive period. At home, the electric power stored in the storage battery 4 is not basically an expense when using the electric power. If the electric power is not sold to the electric power company, the electric power has no use other than consuming the electric home appliance 5 or the like. It is. Therefore, even if the power stored in the storage battery 4 and the system power supplied during the low-cost period of power are the same unit price, the person who consumes the power stored in the storage battery 4 at home. There can be reduced electricity bills. Therefore, in this embodiment, the electric power stored in the storage battery 4 is set to an electric power with a lower electric power unit price than the system electric power supplied from the power plant 6 during the electric power inexpensive period.

  In other words, it can be said that the storage battery 4 is a power storage device other than the power storage device included in the electric vehicle 3.

  The home appliance 5 is a device that consumes electric power, such as a refrigerator, an air conditioner, a television, and a PC, in the home. Electric power is supplied to the home appliance 5 via the HEMS 2. The HEMS 2 has a function of detecting the power consumption of the home appliance 5 (power supplied to the home appliance 5), and the HEMS 2 can grasp the power consumption of the home appliance 5. In addition, the household appliances 5 do not need to receive electric power via HEMS2. In this case, the home appliance 5 is supplied with power directly from the power plant 6, the power generation device 8, the storage battery 4, etc., and the HEMS 2 only needs to have a function of detecting the power directly supplied to the home appliance 5.

  The power generation device 8 is installed in the home, generates power using some energy, and supplies power to other devices. The power generation device 8 is, for example, a solar cell panel, a household fuel cell, a micro gas engine, a small wind power generator, or the like. The power generation device 8 may include the storage battery 4. In the present embodiment, the power generated by the power generation device 8 is basically supplied to the home appliance 5, and when the power generation device 8 generates larger power than the power consumed by the home appliance 5, the surplus power is stored in the storage battery. 4 is stored. That is, in this embodiment, the electric power generated by the power generation device 8 is not supplied directly to the battery 34 but is supplied via the storage battery 4. However, the present invention is not limited thereto, and the power generated by the power generation device 8 may be directly supplied to the battery 34 without using the storage battery 4.

[Configuration of HEMS 2 and Electric Vehicle 3]
Next, the structure of HEMS2 and the electric vehicle 3 is demonstrated based on FIG. FIG. 1 is a block diagram illustrating the main configuration of the HEMS 2 and the electric vehicle 3 in the present embodiment.

  As shown in FIG. 2, the HEMS 2 of this embodiment includes a HEMS control unit 11, a HEMS storage unit 12, a HEMS communication unit 13, a display unit 14, an input unit (input means) 15, a timer 16, a current control unit 17, an AC / The DC converter 18 and the DC / DC converter 19 are provided. The electric vehicle 3 includes an electric vehicle control unit 31, an electric vehicle storage unit 32, an electric vehicle communication unit 33, a battery (power storage device) 34, and an AC / DC conversion unit 35. In addition, the solid line arrow shown in FIG. 1 shows the flow of electricity between each member, and the broken line arrow shows the flow of data between each member.

(1. Configuration of HEMS2)
First, the configuration of the HEMS 2 will be described.

  The HEMS communication unit 13 is for the HEMS 2 to communicate with other devices. Here, it is assumed that the HEMS 2 communicates with the electric vehicle 3 from the HEMS communication unit 13 via the charge / discharge port 7.

  The display unit 14 displays an image according to the control of the HEMS control unit 11. For example, a liquid crystal display device, an EL display device, or the like can be applied as the display unit 14.

  The input unit 15 receives user input operations, and the user controls the operation of the HEMS 2 via the input unit 15. The input unit 15 includes, for example, input keys and a keyboard. The input unit 15 and the display unit 14 may be configured integrally. In this case, the input unit 15 is a so-called touch panel that detects an input operation on the display surface of the display unit 14 and receives the detected input operation.

  In the present embodiment, the user operates the input unit 15 to input data to the HEMS 2. However, the present invention is not limited to this. For example, the user may transmit data to the HEMS 2 by operating a remote controller or a mobile device.

  The timer 16 measures time. The HEMS control unit 11 (a data acquisition unit 21, a charge / discharge plan creation unit 23, and a charge / discharge control unit 25 described later) detects the time measured by the timer 16 and grasps the current time.

  In accordance with instructions from the HEMS control unit 11, the current control unit 17 supplies power supplied from the power plant 6, the power generation device 8, the storage battery 4, and the battery 34 of the electric vehicle to the home appliance 5, the battery 34 of the electric vehicle 3, and the storage battery 4. To supply. The current control unit 17 includes a wattmeter (ammeter) that measures electric power (current). The electric power (current) input from the power plant 6, the power generation device 8, the storage battery 4, and the battery 34 of the electric vehicle; Electric power (current) output to the home appliance 5, the battery 34 of the electric vehicle 3, and the storage battery 4 is measured.

  The AC / DC converter 18 converts an alternating current supplied from the current controller 17 to the storage battery 4 into a direct current, and converts a direct current supplied from the storage battery 4 to the current controller 17 into an alternating current. . In this embodiment, since the storage battery 4 inputs and outputs a direct current, the AC / DC converter 18 is required. However, when the storage battery 4 inputs and outputs an alternating current, the AC / DC converter 18 is not provided. Good. Further, the AC / DC converter 18 may be incorporated in the current controller 17.

  The DC / DC converter 19 converts the high voltage direct current generated by the power generation device 8 into a low voltage direct current. The DC / DC converter 19 may be incorporated in the current controller 17.

  In the present embodiment, the current generated by the power generation device 8 is supplied to the current control unit 17 via the DC / DC conversion unit 19, and the home appliance 5 from the current control unit 17 via the DC / AC conversion unit (not shown). Supplied to. Further, the current generated by the power generation device 8 is supplied to the current control unit 17 via the DC / DC conversion unit 19, and is supplied from the current control unit 17 to the storage battery 4 without going through the AC / DC conversion unit 18. .

  The HEMS control unit 11 executes various programs by executing a program read from the HEMS storage unit 12 to a temporary storage unit (not shown), and comprehensively controls each unit included in the HEMS 2. .

  In the present embodiment, the HEMS control unit 11 includes, as functional blocks, a data acquisition unit (data acquisition unit) 21, a charge / discharge amount calculation unit (expected power consumption determination unit, charge amount determination unit) 22, a charge / discharge plan creation unit ( (Charging plan creation means) 23, current detection unit 24, and charge / discharge control unit (charge / discharge control means, charge control means) 25. In each functional block (21 to 25) of the HEMS control unit 11, a CPU (central processing unit) stores a program stored in a storage device realized by a ROM (read only memory) or the like. ) Etc., and can be realized by reading and executing the temporary storage unit.

  The data acquisition unit 21 acquires information input to the HEMS 2 via the input unit 15 or acquires information from other devices via the HEMS communication unit 13. Specifically, the data acquisition unit 21 is schedule information indicating the user's schedule, the destination related information regarding the user's destination, the departure date and time for leaving the home toward the destination, and the purpose The schedule information including the electric vehicle use presence / absence information indicating whether or not to use the electric vehicle 3 when going is acquired via the input unit 15. In addition, the data acquisition unit 21 sends the fuel consumption information indicating the fuel consumption of the electric vehicle 3 and the storage amount information indicating the current storage amount of the battery 34 of the electric vehicle 3 from the electric vehicle 3 via the HEMS communication unit 13. get.

  More specifically, when the charge / discharge port 7 is connected to the electric vehicle 3, the data acquisition unit 21 waits for a predetermined time until the user operates the input unit 15 to newly input schedule information, and the HEMS The schedule information is read from the storage unit 12. When the schedule information is newly input via the input unit 15, the data acquisition unit 21 acquires the schedule information from the input unit 15 and acquires the schedule information read from the HEMS storage unit 12. On the other hand, when schedule information is not input to the input unit 15 within a predetermined time, the data acquisition unit 21 acquires the schedule information read from the HEMS storage unit 12. Next, the data acquisition unit 21 refers to the time measured by the timer 16 and the acquired schedule information, and confirms whether or not to use the electric vehicle in the next schedule indicated by the schedule information.

  When the user uses an electric vehicle in the next schedule, the data acquisition unit 21 acquires fuel consumption information and storage amount information from the connected electric vehicle 3. The data acquisition unit 21 outputs the acquired schedule information, fuel consumption information, and power storage amount information to the charge / discharge amount calculation unit 22.

  Note that the user may be able to input schedule information to the HEMS 2 at any time. In this case, the data acquisition unit 21 acquires the schedule information from the input unit 15 when the schedule information is input via the input unit 15 regardless of whether or not the electric vehicle 3 is connected. Then, the data acquisition unit 21 stores the acquired schedule information in the HEMS storage unit 12.

  In the present embodiment, when the charge / discharge port 7 is connected to the electric vehicle 3, the data acquisition unit 21 reads the schedule information from the HEMS storage unit 12, but the present invention is not limited to this. For example, the data acquisition unit 21 may acquire only the schedule information from the input unit 15 without reading the schedule information from the HEMS storage unit 12. In addition, when the charge / discharge port 7 is connected to the electric vehicle 3, the data acquisition unit 21 waits for a predetermined time when new schedule information is input from the input unit 15, and new schedule information is received from the input unit 15. When not input, schedule information may be read from the HEMS storage unit 12. That is, the data acquisition unit 21 may acquire schedule information from at least one of the input unit 15 and the HEMS storage unit 12.

  Here, the schedule information which a user inputs into HEMS2 via the input part 15 is demonstrated based on FIG. FIG. 3 is a diagram illustrating an example of schedule information input to the HEMS 2 by the user via the input unit 15.

  As shown in FIG. 3, the schedule information is obtained by associating destination related information, departure date and time, and electric vehicle use presence / absence information. A set of schedule information is given a schedule ID for identifying the schedule information. Destination-related information includes destination name information indicating the name of the destination, address information indicating the address of the destination, telephone number information indicating the telephone number of the destination, destination distance information indicating the distance to the destination, It is information including at least one of desired charge amount information indicating a desired charge amount (desired power amount). In addition, in the example shown in the figure, “◯” indicates that the electric vehicle is used, and “X” indicates that the electric vehicle is not used.

  The charge / discharge amount calculation unit 22 calculates or determines the predicted power consumption of the electric vehicle 3 in the next schedule based on the schedule information and fuel consumption information output from the data acquisition unit 21. Then, the charge / discharge amount calculation unit 22 compares the calculated predicted power consumption amount with the storage amount of the battery 34 of the electric vehicle 3 indicated by the storage amount information output from the data acquisition unit 21, in the next schedule. The target charge / discharge amount of the electric vehicle 3 is calculated. Then, the charge / discharge amount calculation unit 22 transmits charge / discharge amount information indicating the calculated target charge / discharge amount to the charge / discharge plan creation unit 23.

  Specifically, the charge / discharge amount calculation unit 22 determines the predicted travel distance or the predicted power consumption of the electric vehicle 3 in the next schedule based on the destination related information included in the schedule information. More specifically, when the destination-related information indicates the destination name, the destination address, or the destination telephone number, the charge / discharge amount calculation unit 22 refers to the map information from the HEMS storage unit 12, The round trip distance to the point indicated by the name of the place, the address of the destination, or the telephone number of the destination is specified, and the specified distance is set as the expected travel distance. When the destination related information indicates the distance to the destination, the charge / discharge amount calculation unit 22 calculates the predicted travel distance by doubling the distance to the destination. Here, the charge / discharge amount calculation unit 22 calculates the predicted power consumption by multiplying the calculated predicted travel distance by the value of the fuel consumption indicated by the fuel consumption information. Further, when the destination related information indicates the charge amount (desired power amount) desired by the user, the charge / discharge amount calculation unit 22 determines the desired power amount as the predicted power consumption amount.

  In addition, the charge / discharge amount calculation unit 22 sets a value obtained by subtracting the calculated predicted power consumption amount from the power storage amount of the electric vehicle 3 as the target charge / discharge amount. When the amount of electricity stored in the electric vehicle 3 is larger than the calculated expected power consumption, the target charge / discharge amount is a positive value, and when the amount of electricity stored in the electric vehicle 3 is smaller than the calculated expected power consumption The target charge / discharge amount is a negative value. Here, an absolute value when the target charge / discharge amount is a positive value is referred to as a target discharge amount, and an absolute value when the target charge / discharge amount is a negative value is referred to as a target charge amount.

  That is, the target discharge amount is an excess amount of electricity stored in the electric vehicle 3 in the next schedule. The amount of electricity stored in the electric vehicle 3 up to the next schedule can be consumed by the home appliance 5 or stored in the storage battery 4 to reduce the electricity charge. The target charge amount is a charge amount necessary for the electric vehicle 3 in the next schedule. That is, the target charge amount is a difference between the power storage amount required for the electric vehicle 3 in the next schedule and the current power storage amount.

  When the predicted power consumption and the stored power amount match, the target charge / discharge amount is set to “0”, that is, neither the target discharge amount nor the target charge amount is set. At this time, the charge / discharge amount calculation unit 22 sets the target charge / discharge amount to “0” not only when the predicted power consumption and the storage amount exactly match but also when the difference between the two is within a predetermined range. Also good.

  Further, it is desirable that the expected power consumption is estimated with a large value in order to prevent the out of fuel from occurring when the electric vehicle 3 is used. Therefore, when the destination-related information includes two or more pieces of information, the charge / discharge amount calculation unit 22 calculates the predicted power consumption based on each information, and the largest value among the calculated predicted power consumption Is transmitted to the charge / discharge plan creation unit 23.

  Here, when the schedule information shown in FIG. 3 is stored in the HEMS storage unit 12, the user simply inputs the destination name “parent's house” or “friend's house” as the destination-related information, and calculates the charge / discharge amount. The unit 22 can calculate a round-trip distance to the “home” or “friend home” based on the address of the “home” or the telephone number of the “friend home” stored in the HEMS storage unit 12. That is, when the schedule information is held in the HEMS storage unit 12 to simplify the input of the schedule information or the destination related information matches, the charge / discharge amount calculation unit 22 uses the estimated power consumption calculated in the past as it is. Or can be applied.

  The charge / discharge plan creation unit 23 acquires charge / discharge amount information from the charge / discharge amount calculation unit 22, refers to the target charge / discharge amount indicated by the charge / discharge amount information, and performs charge / discharge on the battery 34 of the electric vehicle 3. A charge / discharge period is determined, and a charge / discharge plan including charge / discharge amount information and a charge / discharge period is created. Then, the charge / discharge plan creation unit 23 outputs the created charge / discharge plan to the charge / discharge control unit 25.

  Specifically, the charge / discharge plan creation unit 23 acquires charge / discharge amount information from the charge / discharge amount calculation unit 22, and when the target charge / discharge amount value is positive, that is, from the predicted power consumption, the electric vehicle 3. When the amount of stored electricity is larger, a discharge period that is a period (time period) for discharging the target discharge amount from the battery 34 is determined. Then, the charge / discharge plan creation unit 23 transmits the target discharge amount and the determined discharge period to the charge / discharge control unit 25.

  More specifically, the charging / discharging plan creation unit 23 sets a discharge period as a period until the next scheduled departure date and time, in which power is required in the home or power is insufficient. More specifically, the charge / discharge plan creation unit 23 receives from the HEMS storage unit 12 the amount of power stored in the storage battery 4, the amount of power consumed by the home appliance 5, the amount of power generated by the power generator 8, and the power plant 6 ( The amount of purchased power from the system power source) is read out, and the period in which power is required in the home or the power is insufficient is specified.

  In addition, the charge / discharge plan creation unit 23 needs the electric power in the home by the next scheduled departure date or time, or if there is no shortage of electric power, the discharge period is set after the end of the next schedule. It may be set.

  Moreover, the charge / discharge plan preparation part 23 may determine a discharge period as one continuous period, and is good also considering several periods as a discharge period.

  Moreover, in this embodiment, the charging / discharging plan preparation part 23 makes discharge speed (discharge amount per unit time) from the battery 34 a predetermined value (for example, the maximum output electric energy of the charge / discharge port 7: 3 kW). Determine the discharge period. However, the present invention is not limited to this, the amount of power stored in the storage battery 4 from the HEMS storage unit 12 for each past time zone, the amount of power consumed by the home appliance 5, the amount of power generated by the power generation device 8, and the power from the power plant 6 (system power supply). The discharge period may be determined by reading the purchased power amount and changing the discharge rate for each time period.

  On the other hand, the charge / discharge plan creation unit 23 obtains charge / discharge amount information from the charge / discharge amount calculation unit 22, and when the target charge / discharge amount value is negative, that is, from the predicted power consumption, the amount of power stored in the electric vehicle 3. If is smaller, a charging period, which is a period for charging the battery 34 with the target charging amount, is determined. Then, the charge / discharge plan creation unit 23 transmits the target charge amount and the determined charging period to the charge / discharge control unit 25.

  Specifically, the charge / discharge plan creation unit 23 sets the unit price of the power supply source among the power supply sources that supply power to the battery 34 so that the charging of the target charge amount is completed by the next scheduled departure date and time. The charging period of each power supply source is determined so as to preferentially charge from the power supply source that supplies cheap power.

  In the present embodiment, there are the storage battery 4 and the power plant 6 as power supply sources, and the charge / discharge plan creation unit 23 stores the storage battery from the power supplied from the power plant 6 when charging the battery 34 with the target charge amount. 4, the storage battery power supply period for charging the battery 34 from the storage battery 4 and the power station power supply period for charging the battery 34 from the power station 6 are determined respectively. That is, in the present embodiment, the charging period includes a storage battery power supply period and a power plant power supply period.

  Furthermore, in the present embodiment, a power inexpensive period with a low power unit price is set in the time zone from 23:00 to 7:00 on the next day with respect to the power supplied by the power plant 6. Therefore, when determining the power plant feeding period for charging the battery 34 from the power plant 6, the charging / discharging plan creation unit 23 determines the power plant feeding period so that the power cheaper period is included as long as possible in the power plant feeding period. To do. Here, a period that is a power inexpensive period (from 23:00 to 7:00 on the next day) in the power supply period is referred to as a cheap power supply period, and a period that is not a power inexpensive period (from 7 to 23) in the power supply period. Is called the normal power supply period. That is, the power station power supply period includes a low-cost power supply period and a normal power supply period.

  In addition, the charging / discharging plan creation unit 23 may determine each of the storage battery feeding period, the inexpensive power feeding period, and the normal power feeding period as one continuous period, or the storage battery feeding period, the cheap power feeding period, and the normal power feeding. The period may be a period composed of a plurality of periods.

  Moreover, in this embodiment, the charging / discharging plan preparation part 23 sets the charging speed (charge amount per unit time) from the storage battery 4 and the power plant 6 to the battery 34 to a predetermined value (for example, the maximum of the charging / discharging port 7). The charging period is determined as the output power amount: 3 kW). However, the present invention is not limited to this, the amount of power stored in the storage battery 4 from the HEMS storage unit 12 for each past time zone, the amount of power consumed by the home appliance 5, the amount of power generated by the power generation device 8, and the power from the power plant 6 (system power supply) The charging period may be determined by reading the purchased power amount and changing the charging speed for each time zone.

  In particular, the charging speed from the power plant 6 to the battery 34 is preferably set so that the amount of power purchased from the power plant 6 does not exceed the contracted power amount. Basically, it is desirable to estimate the charging speed to be lower than the charging speed at which charging is actually possible. By setting the charging rate to be low, there is a high possibility that the target charging amount can be charged within the charging period determined by the charging / discharging plan creation unit 23 even if the actual charging rate is slowed down due to some influence. Become.

  Furthermore, the charge / discharge plan creation unit 23 acquires charge / discharge amount information from the charge / discharge amount calculation unit 22, and when the value of the target charge / discharge amount is 0, that is, the predicted power consumption amount and the storage amount of the electric vehicle 3. If they match, no processing is performed and the charge / discharge control unit 25 is notified that there is no charge / discharge plan.

  Here, the specific example of the charging period which the charging / discharging plan preparation part 23 determines is demonstrated based on FIG. FIG. 4 is a diagram illustrating an example of a charging period determined by the charging / discharging plan creation unit 23. As a premise, it is assumed that the storage amount of the battery 34 is 2 kWh and the target charge amount is 8 kWh. 4 (a) and 4 (b), the power that can be supplied by the storage battery 4 is stored at 3 kWh, and in FIG. 4 (c), the power that can be supplied by the storage battery 4 is not stored. To do.

  In the example shown in FIG. 4A, the charging / discharging plan creation unit 23 determines a period for supplying 3 kWh stored in the storage battery 4 out of the target charging amount 8 kWh. As shown to Fig.4 (a), the charging / discharging plan preparation part 23 makes the period from time t1 to t2 into the storage battery electric power feeding period which supplies electric power from the storage battery 4 to the battery 34. FIG. Then, a period for supplying power from the power plant 6 for the remaining 5 kWh of the target charge amount is determined. Here, since there is a low power period before the departure time and the remaining 5 kWh can be charged within the low power period, the charging / discharging plan creation unit 23 is a period up to the departure time and within the low power period. The period from time t3 to t4 is determined as the low-cost power supply period.

  In the example shown in FIG. 4A, the storage battery feeding period (from time t1 to t2) and the low-cost power feeding period (from time t3 to t4) are not continuous, but as shown in FIG. The discharge plan creation unit 23 may determine the charging period by continuing the storage battery power supply period (from time t11 to t12) and the inexpensive power supply period (from time t12 to t13). In addition, if the remaining 5 kWh can be charged within the power cheap period up to the departure time, the charge / discharge plan creation unit 23 sets the storage battery power feeding period in the power cheap period as shown in FIG. Also good.

  In the example shown in FIG. 4C, the charge / discharge plan creation unit 23 determines a power plant feeding period in which the target charge amount 8 kWh is supplied from the power plant 6 during the period up to the departure time. Here, there is an inexpensive power period until the departure time, but since all the target charge amount cannot be charged within the inexpensive power period until the departure time, the most inexpensive power period is included in the power supply period. The inexpensive power supply period is determined from time t22 to t23. As shown in FIG. 4 (c), since the charge amount to be charged in the low-cost power supply period is 5 kWh, it is a period for charging the remaining 3 kWh and is not a power low-cost period until the departure time (time t21 to t22) are determined as the normal power supply period.

  The current detection unit 24 detects power measured by the current control unit 17. Specifically, the current detection unit 24 detects the amount of power per unit time supplied by the current control unit 17 from the power plant 6, that is, the purchased grid power amount (purchased power amount) per unit time. It is. The current detection unit 24 detects the amount of power per unit time supplied from the power generation device 8 by the current control unit 17, that is, the amount of power generation per unit time generated by the power generation device 8. The current detection unit 24 detects the amount of power per unit time supplied from the storage battery 4 by the current control unit 17. The current detection unit 24 detects the amount of power per unit time supplied from the battery 34 by the current control unit 17, that is, the amount of discharge per unit time when the battery 34 is discharged.

  Moreover, the electric energy per unit time supplied to the household appliances 5 from the electric current control part 17, ie, the electric power consumption per unit time of the household appliances 5, is detected. Further, the amount of power per unit time supplied from the current control unit 17 to the battery 34, that is, the amount of charge per unit time charged to the battery 34 is detected. Moreover, the electric energy per unit time supplied to the storage battery 4 from the current control part 17 is detected.

  Based on the amount of power per unit time that the current control unit 17 supplies from the storage battery 4 and the amount of power per unit time that is supplied from the current control unit 17 to the storage battery 4, the current detection unit 24 4 is calculated, and the calculated storage amount of the storage battery 4 is notified to the charge / discharge plan creation unit 23. In addition, the current detection unit 24 transmits purchased power amount information indicating the value of the detected purchased power amount to the charge / discharge control unit 25.

  The current detection unit 24 creates power amount history information from the detected power amount and the calculated power storage amount of the storage battery 4, and stores the power storage amount of the storage battery 4 for each past time zone, the power consumption amount of the home appliance 5, and the power generation device 8. The HEMS storage unit 12 may store the power generation history information indicating the amount of power generated, the amount of power purchased from the power plant 6 (system power supply), and the amount of charge and discharge of the battery 34.

  The charge / discharge control unit 25 acquires the charge / discharge plan from the charge / discharge plan creation unit 23, and controls the current control unit 17 to execute charge / discharge of the battery 34 of the electric vehicle 3 according to the acquired charge / discharge plan. It is.

  Specifically, the charge / discharge control unit 25 receives the target discharge amount and the discharge period from the charge / discharge plan creation unit 23, discharges the electric power stored in the battery 34 during the discharge period, and receives the target from the battery 34. The current controller 17 is controlled so as to discharge the discharge amount. Further, the charge / discharge control unit 25 receives the target charge amount and the charge period from the charge / discharge plan creation unit 23, charges the battery 34 during the charge period, and charges the battery 34 with the target charge amount. The current controller 17 is controlled.

  In addition, the charge / discharge control unit 25 instructs the current control unit 17 to charge / discharge the battery 34 at the discharge rate or the charge rate set by the charge / discharge plan creation unit 23. However, at the time of charging the battery 34, in order to increase the possibility that the charging of the target charging amount is completed by the departure date and time, the purchased power amount information is acquired from the current detection unit 24 and the contract power described later from the HEMS storage unit 12. Even if the information and the charge / discharge capability information are read out and the current control unit 17 is instructed to maximize the output power of the charge / discharge port 7 within a range in which the value indicated by the purchased power amount information does not exceed a predetermined threshold value. Good.

  The charge / discharge control unit 25 also displays a control result instructed to the current control unit 17 and a control result indicating whether the charge / discharge has been performed according to the charge / discharge plan instructed by the current control unit 17. May be stored.

  The HEMS storage unit 12 holds data to be referred to when the HEMS control unit 11, particularly the data acquisition unit 21, the charge / discharge plan creation unit 23, and the charge / discharge control unit 25 execute processing. Specifically, the HEMS storage unit 12 includes contract power information indicating the time zone of the low-cost power period and the contract power amount with the power company, charge / discharge capability information indicating the maximum value of the output power of the charge / discharge port 7, It holds schedule information indicating a schedule, map information indicating the position of a certain point and a distance between two points, power amount history information, and the like.

  FIG. 5 shows an example of contract power information and charge / discharge capacity information held by the HEMS storage unit 12. FIG. 5A is a diagram illustrating an example of contract power information, and FIG. 5B is a diagram illustrating an example of charging capacity information. As shown in FIG. 5 (a), the contract power information indicates a time zone (23:00 to 7:00 on the next day) during the low power period and a value (5kW (50A)) of the contract power. Moreover, as shown in FIG.5 (b), charging capability information shows the maximum value (3 kW) of the output electric power of the charging / discharging port 7. FIG.

(2. Configuration of electric vehicle 3)
Next, the configuration of the electric vehicle 3 will be described. Although the electric vehicle 3 has a configuration for functioning as a vehicle such as an electric motor, illustration and description are omitted here for convenience.

  The electric vehicle communication unit 33 is for the electric vehicle 3 to communicate with other devices. Here, it is assumed that the electric vehicle 3 communicates with the HEMS 2 from the electric vehicle communication unit 33 via the charge / discharge port 7.

  The battery 34 is a secondary battery that accumulates electric energy (electric power) that serves as power for the electric motor of the electric vehicle 3. In the present embodiment, it is assumed that the power capacity (maximum charged amount) when the battery 34 is fully charged is 16 kWh.

  The AC / DC converter 35 converts an alternating current supplied from the current controller 17 to the battery 34 into a direct current, and converts a direct current supplied from the battery 34 to the current controller 17 into an alternating current. . In this embodiment, since the battery 34 inputs and outputs a direct current, the AC / DC converter 35 is required. However, when the battery 34 inputs and outputs an alternating current, the AC / DC converter 35 is not necessary. Good.

  The electric vehicle control unit 31 executes various programs by executing a program read from the electric vehicle storage unit 32 to a temporary storage unit (not shown), and comprehensively controls the functions of the electric vehicle 3. To do. The electric vehicle control unit 31 can be realized by the CPU reading and executing a program stored in a storage device realized by a ROM or the like into a temporary storage unit realized by a RAM or the like.

  Specifically, the electric vehicle control unit 31 detects the current storage amount of the battery 34 and creates storage amount information indicating the current storage amount value of the battery 34. Moreover, when the electric vehicle control unit 31 receives a data transmission instruction from the data acquisition unit 21 of the HEMS 2, the electric vehicle control unit 31 reads fuel consumption information from the electric vehicle storage unit 32, creates storage amount information of the battery 34, and calculates fuel consumption information and storage amount. Information is transmitted to the data acquisition unit 21 via the electric vehicle communication unit 33.

  The electric vehicle storage unit 32 holds fuel consumption information and the like. An example of data held by the electric vehicle storage unit 32 is shown in FIG. FIG. 6 is a diagram illustrating an example of fuel consumption information held by the electric vehicle storage unit 32 of the electric vehicle 3.

  As shown in FIG. 6A, the fuel consumption information indicates the fuel consumption value (125 Wh / km) of the electric vehicle 3. Further, as shown in FIG. 6B, the storage amount information indicates the remaining storage amount (2 kWh) of the battery 34 mounted on the electric vehicle 3.

  In the present embodiment, the fuel consumption information is stored in the electric vehicle storage unit 32 in advance, and the fuel consumption value indicated by the fuel consumption information is assumed to be a value published by the manufacturer, but is not limited thereto. It is not a thing. For example, the electric vehicle control unit 31 may calculate a fuel consumption value. In this case, for example, the electric vehicle control unit 31 stores the storage amount (reduction amount) of the battery 34 in association with the travel distance, and calculates the fuel consumption based on the travel distance and the storage amount. Good. Moreover, when using the value announced by the manufacturer as the value of fuel consumption, the HEMS 2 is not acquired from the electric vehicle 3 but acquired from the server of the manufacturer or from the user via the input unit 15. Or you may get it.

[Operation of HEMS2]
Next, the charge / discharge control processing executed by the HEMS 2 will be described with reference to FIG. FIG. 7 is a flowchart illustrating an example of the charge / discharge control process executed by the HEMS 2. Moreover, FIG. 8 is a flowchart which shows an example of the charging / discharging plan preparation process which the charging / discharging plan preparation part 23 of HEMS2 performs.

  First, the user inserts the charge / discharge port 7 into the electric vehicle 3 so that the battery 34 of the electric vehicle 3 can be charged and discharged. And a user operates the input part 15 and inputs a schedule into HEMS2.

  At this time, as shown in FIG. 7, the data acquisition unit 21 of the HEMS 2 acquires schedule information from the input unit 15 and the HEMS storage unit 12 (S1). The data acquisition unit 21 refers to the acquired schedule information and confirms whether or not the user uses the electric vehicle 3 in the next schedule (S2). If the user does not use an electric person in the next schedule (NO in S2), the HEMS 2 ends the charge / discharge control process.

  On the other hand, when the user uses an electric automated person in the next schedule (YES in S2), the data acquisition unit 21 acquires fuel consumption information and storage amount information from the electric vehicle 3 via the HEMS communication unit 13 (S3). ). The data acquisition unit 21 outputs the acquired schedule information, fuel consumption information, and power storage amount information to the charge / discharge amount calculation unit 22.

  The charge / discharge amount calculation unit 22 calculates or determines the predicted power consumption of the electric vehicle 3 in the next schedule based on the schedule information and fuel consumption information output from the data acquisition unit 21 (S4). Then, the charge / discharge amount calculation unit 22 compares the calculated predicted power consumption amount with the storage amount of the battery 34 of the electric vehicle 3 indicated by the storage amount information output from the data acquisition unit 21, in the next schedule. A target charge / discharge amount of the electric vehicle 3 is calculated (S5). Then, the charge / discharge amount calculation unit 22 transmits charge / discharge amount information indicating the calculated target charge / discharge amount to the charge / discharge plan creation unit 23.

  The charge / discharge plan creation unit 23 acquires charge / discharge amount information from the charge / discharge amount calculation unit 22, refers to the target charge / discharge amount indicated by the charge / discharge amount information, and performs charge / discharge on the battery 34 of the electric vehicle 3. A charge / discharge period is determined, and a charge / discharge plan including charge / discharge amount information and a charge / discharge period is created (S6). Then, the charge / discharge plan creation unit 23 outputs the created charge / discharge plan to the charge / discharge control unit 25. Details of the charge / discharge plan creation processing executed by the charge / discharge plan creation unit 23 in S6 will be described later.

  The charge / discharge control unit 25 acquires the charge / discharge plan from the charge / discharge plan creation unit 23, and controls the current control unit 17 to execute charge / discharge of the battery 34 of the electric vehicle 3 according to the acquired charge / discharge plan ( S7). Then, according to the charge / discharge plan, the charge / discharge control unit 25 determines whether or not the charge / discharge of the target charge / discharge amount of the battery 34 of the electric vehicle 3 has been completed by the next scheduled departure date and time (S8). ). When charging / discharging of the target charging / discharging amount has been completed by the departure date and time (YES in S8), the HEMS control unit 11 causes the display unit 14 to display that charging / discharging has been completed according to the charging / discharging plan (S9). . On the other hand, when the charge / discharge of the target charge / discharge amount has not been completed by the departure date and time (NO in S8), the HEMS control unit 11 indicates on the display unit 14 that the charge / discharge has not been completed according to the charge / discharge plan. An error is displayed (S10).

  In S4 or S5, if the charge / discharge amount calculation unit 22 cannot calculate the expected power consumption or target charge / discharge amount due to lack of necessary information, the HEMS control unit 11 lacks necessary information. May be displayed on the display unit 14.

  In S6, when the target charge / discharge amount cannot be completed by the departure date and time, the HEMS control unit 11 may display the fact on the display unit 14. At this time, the HEMS control unit 11 may charge / discharge the battery 34 immediately and allow the user to select whether to charge / discharge as much power as possible or to stop charging / discharging the battery 34.

(Charge / discharge plan creation process)
Next, the charging / discharging plan preparation process which the charging / discharging plan preparation part 23 of HEMS2 performs is demonstrated based on FIG. FIG. 8 is a flowchart illustrating an example of a charge / discharge plan creation process executed by the charge / discharge plan creation unit 23 of the HEMS 2.

  As illustrated in FIG. 8, the charge / discharge plan creation unit 23 acquires charge / discharge amount information from the charge / discharge amount calculation unit 22, and whether or not the target charge / discharge amount value is positive, that is, the predicted power consumption amount. Thus, it is determined whether or not the amount of electricity stored in the electric vehicle 3 is larger (S21).

  The charge / discharge plan creation unit 23 sets a discharge period, which is a period (time zone) during which the target discharge amount is discharged from the battery 34, when the amount of power stored in the electric vehicle 3 is larger than the expected power consumption (YES in S21). Determine (S22). Then, the charge / discharge plan creating unit 23 transmits a charge / discharge plan including the target discharge amount and the determined discharge period to the charge / discharge control unit 25.

  When the charge amount of the electric vehicle 3 is not larger than the expected power consumption (NO in S21), the charge / discharge plan creation unit 23 then determines whether the value of the target charge / discharge amount is negative, that is, Then, it is determined whether or not the amount of electricity stored in the electric vehicle 3 is smaller than the expected power consumption (S23).

  Here, when the target charge / discharge amount is “0”, that is, when the predicted power consumption matches the amount of electricity stored in the electric vehicle 3 (NO in S23), the charge / discharge plan creation unit 23 creates the charge / discharge plan. First, the charge / discharge plan creation process is terminated.

  On the other hand, when the storage amount of the electric vehicle 3 is smaller than the predicted power consumption (YES in S23), the charge / discharge plan creation unit 23 determines whether the power stored in the storage battery 4 is greater than or equal to a predetermined threshold value. Is confirmed (S24). When the storage battery 4 is storing the electric power more than a predetermined threshold value (it is YES at S24), the charging / discharging plan preparation part 23 can further cover the target charge amount with the usable electric power stored in the storage battery 4 Is confirmed (S25). When the target charge amount can be charged with usable power stored in the storage battery 4 (YES in S25), the charge / discharge plan creation unit 23 determines a storage battery power supply period for charging the target charge amount from the storage battery 4 ( S26). Then, the charge / discharge plan creation unit 23 transmits a charge / discharge plan including the target charge amount and the determined storage battery power supply period to the charge / discharge control unit 25.

  If the target charge amount cannot be covered with the available power stored in the storage battery 4 (NO in S25), the charge / discharge plan creation unit 23 confirms whether there is a cheap power period before the departure date and time. (S27). If there is an inexpensive power period before the departure date and time (YES in S27), the charge / discharge plan creation unit 23 then continues with the remaining target charge amount (accumulated by the storage battery 4 from the target charge amount) during the inexpensive power period until the departure date and time. It is confirmed whether or not it is possible to charge the electric energy obtained by subtracting the available electric energy (S28). When the remaining target charge amount can be charged in the power cheap period up to the departure date and time (YES in S28), the charge / discharge plan creation unit 23 sends the storage battery 4 from the storage battery 4 and the power station 6 within the power cheap period. A low-cost power supply period, which is a period for charging the battery, is determined (S29). Then, the charge / discharge plan creation unit 23 transmits a charge / discharge plan including the target charge amount, the determined storage battery power supply period, and the low-cost power supply period to the charge / discharge control unit 25.

  On the other hand, when the remaining target charge amount cannot be charged in the low power period until the departure date and time (NO in S28), the charging / discharging plan creation unit 23 performs the storage battery feeding period for charging from the storage battery 4 and the power from the power station 6. A low-cost power supply period, which is a period for charging within the low-cost period, and a normal power supply period, which is a period for charging from the power plant 6 other than the low-cost power period, are determined (S30). Then, the charge / discharge plan creation unit 23 transmits to the charge / discharge control unit 25 a charge / discharge plan including the target charge amount, the determined storage battery power supply period, the inexpensive power supply period, and the normal power supply period.

  Moreover, in S27, when there is no power cheap period by the departure date and time (NO in S27), the charge / discharge plan creation unit 23 charges the storage battery from the storage battery 4 and the power station 6 other than the power cheap period. A normal power supply period, which is a period, is determined (S31). Then, the charge / discharge plan creation unit 23 transmits a charge / discharge plan including the target charge amount, the determined storage battery power supply period, and the normal power supply period to the charge / discharge control unit 25.

  Moreover, in S24, when the storage battery 4 is not storing the electric power more than a predetermined threshold value (it is NO at S24), the charging / discharging plan preparation part 23 confirms whether there is an electric power cheap period by the departure date and time ( S32). If there is an inexpensive power period before the departure date and time (YES in S32), the charge / discharge plan creation unit 23 subsequently checks whether or not the entire target charge amount can be charged in the inexpensive power period until the departure date and time (S33). . When all the target charge amount can be charged in the power cheap period up to the departure date and time (YES in S33), the charge / discharge plan creation unit 23 sets the cheap power supply period, which is a period for charging from the power plant 6 within the power cheap period. Determine (S34). Then, the charge / discharge plan creation unit 23 transmits a charge / discharge plan including the target charge amount and the determined inexpensive power supply period to the charge / discharge control unit 25.

  On the other hand, when all of the target charge amount cannot be charged in the power cheap period up to the departure date and time (NO in S33), the charge / discharge plan creating unit 23 charges the power station 6 within the power cheap period and the low-cost power supply period. And the normal electric power feeding period which is a period charged from the power station 6 other than an inexpensive electric power period is determined (S35). Then, the charge / discharge plan creation unit 23 transmits to the charge / discharge control unit 25 a charge / discharge plan including the target charge amount and the determined inexpensive power supply period and normal power supply period.

  In S32, when there is no cheap power period before the departure date and time (NO in S32), the charging / discharging plan creation unit 23 determines a normal power feeding period that is a period for charging from the power plant 6 other than the cheap power period ( S36). Then, the charge / discharge plan creation unit 23 transmits a charge / discharge plan including the target charge amount and the determined normal power supply period to the charge / discharge control unit 25.

  In S22, the charge / discharge plan creation unit 23 determines a discharge period during which the target discharge amount is discharged from the battery 34, so that the charge / discharge control unit 25 sets the target discharge amount from the battery 34 during the discharge period according to the charge / discharge plan. Discharge.

  Of the electric power stored in the battery 34, the excess electric power that exceeds the expected power consumption is not used in the electric vehicle 3 in the next schedule, and thus is power that has no use until the next schedule is completed. The power stored in the battery 34 is equal to or less expensive than the system power supplied from the power plant 6. Therefore, even if the excess power stored in the battery 34 and the system power have the same unit price, the excess power stored in the battery 34 is consumed at home rather than consuming the system power. If you consume more, you can reduce the electricity bill. Therefore, in the present embodiment, the excess power stored in the battery 34 is discharged from the battery 34 so that it can be used at home.

[Modification]
In the present embodiment, the electric power generated by the power generation device 8 is not directly supplied to the battery 34 but is temporarily stored in the storage battery 4 and then supplied to the battery 34. However, the present invention is not limited to this. Absent. The electric power generated by the power generation device 8 may be directly supplied to the battery 34. In this case, the charge / discharge plan creation unit 23 generates power other than the power generated by the power generator 8, the power stored in the storage battery 4, the power supplied from the power station within the power inexpensive period, and the power cheap period from the power station. A charge / discharge plan is created so that the target charge amount is charged to the battery 34 by the departure date and time in priority in the order of the supplied power.

  In this case, the current generated by the power generation device 8 is supplied to the current control unit 17 through the DC / DC conversion unit 19, and is supplied from the current control unit 17 to the battery 34 without going through the AC / DC conversion unit 35. The

  Further, in this embodiment, the electric power company classifies the electricity charge period and the other period, and sets the electricity charges in two stages. However, the present invention is not limited to this. For example, the electricity rate may be set in three stages or more for 24 hours. At this time, when supplying power from the power plant 6 to the battery 34, the charging / discharging plan creation unit 23 prioritizes the period during which the electricity price is cheapest, and determines the period during which power is supplied from the power plant 6 to the battery 34. .

  Moreover, it replaces with the AC / DC conversion part 18, the DC / DC conversion part 19, and the AC / DC conversion part 35, and the charging / discharging control system 1 may be provided with the power conditioner. The power conditioner is a device that is independent of the HEMS 2 and the electric vehicle 3, and is a current exchanger that integrates the functions of the AC / DC converter 18, the DC / DC converter 19, the AC / DC converter 35, and the like. The power conditioner is disposed between the current control unit 17 of the HEMS 2 and the power plant 6, the storage battery 4, the home appliance 5, and the battery 34 (charge / discharge port 7). These conversion relationships (high voltage-low voltage, DC-AC, etc.) are collectively performed. Note that the current control unit 17 may have a function of a power conditioner.

[Supplement]
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  Finally, each block of the HEMS 2, particularly the HEMS control unit 11, may be configured by hardware logic, or may be realized by software using a CPU as follows.

  That is, the HEMS 2 is a storage device (recording medium) such as a CPU that executes instructions of a control program that realizes each function, a ROM that stores the program, a RAM that expands the program, a memory that stores the program and various data, and the like. Etc. An object of the present invention is to provide a recording medium in which a program code (execution format program, intermediate code program, source program) of a control program of HEMS2 which is software for realizing the functions described above is recorded so as to be readable by a computer. This can also be achieved by reading the program code recorded on the recording medium and executing it by the computer (or CPU or MPU).

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  Further, the HEMS 2 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  INDUSTRIAL APPLICABILITY The present invention can be used for a charge / discharge control device or a charge control device that controls charge / discharge of a vehicle equipped with a power storage device at home or business.

1 Charge / Discharge Control System 2 HEMS (Charge / Discharge Control Device, Charge Control Device)
3 Electric vehicles (vehicles)
4 Storage battery (power storage device, power supply source)
6 Power plant (system power supply, power supply source)
8 Power generator (power supply source)
11 HEMS control part 15 Input part (input means)
21 Data acquisition unit (data acquisition means)
22 Charge / discharge amount calculation unit (expected power consumption determination means, charge amount determination means)
23 Charging / discharging plan creation part (charging plan creation means)
25 Charge / discharge control unit (charge / discharge control means, charge control means)
34 Battery (power storage device)

Claims (10)

A charge control device for controlling charging of a power storage device provided in a vehicle,
An input means for inputting a date and time when the user departs toward the destination and destination related information regarding the destination;
Data acquisition means for acquiring the amount of electricity stored in the power storage device from the vehicle, the departure date and time input to the input means, and the destination related information;
Based on the departure date and time and destination-related information acquired by the data acquisition unit, an expected power consumption determination unit that determines the predicted power consumption of the next vehicle,
A charge amount determining means for determining a target charge amount based on the stored power amount of the power storage device acquired by the data acquiring means and the predicted power consumption amount determined by the predicted power consumption determining means;
Electric power that charges the target charge amount determined by the charge amount determination means before the next vehicle departure date and that supplies electric power with a lower power unit price among electric power supply sources that supply electric power to the power storage device Charging plan creation means for determining the charging period of each power supply source so as to preferentially charge from the supply source;
Charge control means comprising charge control means for controlling the power storage device to charge the target charge amount from each power supply source in accordance with the charging period of each power supply source determined by the charge plan creation means apparatus.   In the case where the power supply source includes a power storage device other than a power storage device included in a vehicle to be charged, the power supply source includes a power storage device included in a vehicle to be charged from the system power supply. The charge control device according to claim 1, wherein priority is given to a power storage device other than the above.   When the power supply source includes a system power source and a different power unit price is set for each time zone with respect to the power supplied by the system power source, the charging plan creation means has a time zone with a lower power unit price. The charging control device according to claim 1, wherein the charging period of the system power supply is determined with priority given to the power supply.   When the data acquisition unit acquires a plurality of the destination related information associated with the departure date and time, the predicted power consumption determination unit calculates the power amount based on each destination related information, and calculates the calculated power The charge control device according to any one of claims 1 to 3, wherein a maximum power amount among the amounts is determined as an expected power consumption amount. A charge / discharge control device for controlling charge / discharge of a power storage device provided in a vehicle,
An input means for inputting a destination related information regarding the destination and a date and time when the user departs toward the destination;
Data acquisition means for acquiring the amount of electricity stored in the power storage device from the vehicle, and the destination related information and departure date and time input to the input means;
Based on the destination related information acquired by the data acquisition means and the departure date and time, expected power consumption determination means for determining the expected power consumption of the next vehicle,
When the power storage amount of the power storage device acquired by the data acquisition unit is larger than the predicted power consumption determined by the predicted power consumption determination unit, the difference power amount between the predicted power consumption and the power storage amount is calculated. Control to discharge by the date and time of the next vehicle departure,
On the other hand, if the stored power amount of the power storage device acquired by the data acquisition unit is smaller than the predicted power consumption determined by the predicted power consumption determining unit, the difference power between the predicted power consumption and the stored power amount Charge / discharge control apparatus comprising charge / discharge control means for controlling the amount to be charged before the next vehicle departure date and time. A control method of a charge control device for controlling charging of a power storage device provided in a vehicle,
An input step for inputting a date and time when the user departs toward the destination and destination related information regarding the destination;
A data acquisition step of acquiring the amount of power stored in the power storage device from the vehicle, the departure date and time and the destination related information input in the input step;
Based on the departure date and time and destination related information acquired in the data acquisition step, an expected power consumption determination step for determining the predicted power consumption of the next vehicle,
A charge amount determining step for determining a target charge amount based on the stored power amount of the power storage device acquired in the data acquiring step and the predicted power consumption amount determined in the predicted power consumption determination step;
Supply power with a low power unit price among the power supply sources that supply power to the power storage device so that the target charge amount determined in the charge amount determination step is charged by the next vehicle departure date and time. A charging plan creation step for determining a charging period for each power supply source so as to preferentially charge from the power supply source;
A charging control step of controlling the power storage device to charge the target charging amount from each power supply source according to the charging period of each power supply source determined in the charging plan creation step. Control method of the control device. A control method of a charge / discharge control device for controlling charge / discharge of a power storage device provided in a vehicle,
An input step in which the user inputs destination related information about the destination and the date and time to depart for the destination;
A data acquisition step for acquiring the amount of power stored in the power storage device from the vehicle, and the destination related information and departure date and time input in the input step;
Based on the destination related information acquired in the data acquisition step and the departure date and time, an expected power consumption determination step for determining the expected power consumption of the next vehicle,
If the power storage amount of the power storage device acquired in the data acquisition step is larger than the predicted power consumption determined in the predicted power consumption determination step, the difference power between the predicted power consumption and the power storage amount Control the amount to discharge by the next vehicle departure date and time,
On the other hand, if the power storage amount of the power storage device acquired in the data acquisition step is smaller than the predicted power consumption determined in the predicted power consumption determination step, the difference between the predicted power consumption and the power storage amount And a charge / discharge control step for controlling the amount of electric power to be charged before the next vehicle departure date and time.   A control program for operating the charge control device according to any one of claims 1 to 4, wherein the control program causes a computer to function as each of the means.   A control program for operating the charge / discharge control apparatus according to claim 5, wherein the control program causes a computer to function as each means.   A computer-readable recording medium on which the control program according to claim 8 or 9 is recorded.

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