JP2015095983A - Charge/discharge management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charge/discharge management system for managing charging/discharging electric vehicle to economically use the electric power.SOLUTION: A charge/discharge determination section 16b calculates a charge amount necessary for travelling based on a piece of schedule information on use of an electric vehicle 10 and compares the same to a remaining storage level of a battery 12. When the necessary charge amount exceeds the remaining storage level, the charge/discharge determination section 16b calculates the charging amount; and when the necessary charge amount lowers the remaining storage level, the charge/discharge determination section 16b calculates the discharge amount to discharge surplus amount. When charging the shortage, a period setting section 16c sets a charge period to charge the vehicle in a period when purchasing price of the power is lower up to the date and time of the next use based on the schedule information and a piece of price information on the price purchasing the power from a commercial power supply 100. When discharging the surplus, the period setting section 16c sets a discharge period to discharge the vehicle in a period when the power purchasing price is higher based on the schedule information and the price information.

Description

  The present invention relates to a charge / discharge management system, and more particularly to a charge / discharge management system that manages charging and discharging from an electric vehicle.

  2. Description of the Related Art Conventionally, a charge / discharge management device that manages charging of an electric vehicle and discharging from the electric vehicle has been proposed (see, for example, Patent Document 1). This charge / discharge management apparatus is realized by a home energy management system (HEMS) installed in a home. The HEMS includes an input unit for inputting schedule information of the electric vehicle, a HEMS communication unit for communicating with the electric vehicle connected to the charge / discharge port, and a HEMS control unit. The HEMS control unit calculates the expected power consumption of the electric vehicle in the next schedule based on the schedule information input via the input unit. A HEMS communication part communicates with the electric vehicle connected to the charging / discharging port, acquires the information of the electrical storage amount of a battery, and outputs it to a HEMS control part. The HEMS control unit obtains a target charge / discharge amount by subtracting the predicted power consumption from the amount of electricity stored. If the target charge / discharge amount is a negative value, charging is required, and the HEMS control unit has a low power unit price among the plurality of power supply sources so that charging of the target charge amount is completed by the departure date and time. The charging period of each power supply source is determined so as to preferentially charge. In addition, if the target charge / discharge amount is a positive value, there is an extra storage amount, and the HEMS control unit discharges the target discharge amount obtained by subtracting the predicted power consumption from the storage amount and a period during which the target discharge amount is discharged. Determine the period.

JP 2010-81722 A

  In the charge / discharge management device of Patent Document 1, if there is an excess in the amount of electricity stored, the excess amount of electricity stored is discharged during the discharge period. However, since the discharge period is set regardless of the unit price of power, the unit price of electricity is low. Discharging the extra battery charge during the time period could be uneconomical.

  The present invention has been made in view of the above problems, and an object thereof is to provide a charge / discharge management system that can economically charge an electric vehicle and use electric power discharged from the electric vehicle.

  The charge / discharge management system of the present invention includes an information acquisition unit, a charge / discharge determination unit, a period setting unit, and a charge / discharge control unit. The information acquisition unit acquires schedule information about a use schedule of an electric vehicle that drives an electric motor for traveling with electric power stored in a battery, and price information about a power purchase price from a commercial power source. The charge / discharge determination unit compares a necessary charge amount required for traveling obtained from the schedule information with a remaining power storage amount of the battery. The charge / discharge determination unit is configured to charge a shortage with electric power supplied from a commercial power source when the required charge amount exceeds the remaining power storage amount, and surplus when the required charge amount is lower than the remaining power storage amount. Determine the amount of discharge that discharges the minute. If it is determined by the charge / discharge determination unit that the shortage is charged, the period setting unit is charged during a period when the power purchase price is less expensive until the next use start date and time based on the schedule information and the price information. To set the charging period. If it is determined by the charge / discharge determination unit that the surplus portion is discharged, the period setting unit is discharged during a period when the power purchase price is more expensive until the next use start date and time based on the schedule information and the price information. Set the discharge period to The charge / discharge control unit controls both charging to the battery and discharging from the battery according to a determination result of the charge / discharge determination unit and a setting content of the period setting unit.

  In this charge / discharge management system, the information acquisition unit preferably acquires the schedule information and the price information held by the controller from a controller that manages energy used by consumers.

  In this charge / discharge management system, it is also preferable to further include the following configuration. The charge / discharge management system receives power supplied from a commercial power supply via a customer-side power distribution system to the electric vehicle, and receives power discharged from the electric vehicle and supplies the power to the power distribution system. The charging / discharging equipment which performs both operation | movement to perform is provided. The charging / discharging facility and the electric vehicle each include a power supply / reception unit that receives and supplies power without contact.

  According to the present invention, the charge / discharge determination unit obtains the necessary charge amount necessary for traveling from the schedule information, compares the required charge amount with the remaining amount of charge of the battery, and if the remaining charge amount is insufficient, the charge amount is If there is a surplus in the amount of stored electricity, the amount of discharge is obtained. In the case of charging, the period setting unit sets the charging period by the next use start date and time, so that the battery of the electric vehicle can be reliably charged by the next use start date and time. Furthermore, since the period setting unit sets the charging period so that the purchase price is less expensive until the use start date and time based on the schedule information and price information, the electricity charge for charging the battery Can be reduced. Furthermore, when there is a surplus in the remaining amount of electricity stored in the battery, the period setting unit sets the discharge period so that the purchase price is discharged until the use start date and time and the purchase price is more expensive. By using the surplus, the electricity bill purchased from the commercial power source can be reduced.

It is a schematic block diagram of the charging / discharging management system of this embodiment. (A) (b) is a schematic system block diagram of the charging / discharging management system of this embodiment. It is a graph explaining the price information registered into the charge / discharge management system of this embodiment. It is a flowchart explaining operation | movement of the charging / discharging management system of this embodiment.

  An embodiment of a charge / discharge management system according to the present invention will be described with reference to FIGS.

  The charge / discharge management system of this embodiment includes an in-vehicle device 11 mounted on an electric vehicle 10 as shown in FIGS. 1 and 2A.

  The electric vehicle 10 includes a battery 12 that is a secondary battery such as a lithium ion battery, an electric motor 14 for traveling, and a motor drive unit 13 that drives the electric motor 14 with electric power stored in the battery 12. The electric vehicle 10 of the present embodiment is an EV (Electric Vehicle) that includes only the electric motor 14 as a prime mover, but may be a plug-in hybrid electric vehicle (PHEV). The electric vehicle 10 is not limited to a four-wheel electric vehicle, and may be a two-wheel electric vehicle or a three-wheel electric vehicle or more.

  In the system shown in FIG. 1 and FIG. 2A, a charging / discharging stand 20 is installed outside the dwelling unit 30 as charging / discharging equipment in order to charge the electric vehicle 10 and discharge from the electric vehicle 10.

  The charging / discharging stand 20 is supplied with AC power from the commercial power supply 100 via the distribution board 40 installed in the dwelling unit 30. The charging / discharging stand 20 has a built-in leakage breaker (not shown), for example. A branch wiring from the distribution board 40 is connected to the primary side of the earth leakage breaker, and one end of the electric cable 21 is connected to the secondary side of the earth leakage breaker. A plug connector CN1 is connected to the other end of the electric cable 21. The charging / discharging stand 20 is electrically connected to the electric vehicle 10 by connecting the plug connector CN1 to the receptacle connector CN2 of the electric vehicle 10, and can be charged or discharged.

  The distribution board 40 houses a main switch 41 and a plurality of branch switches 42 in the board. The primary side of the main switch 41 is connected to the commercial power source 100, and a plurality of branch switches 42 are connected to the secondary side of the main switch 41. The charging / discharging stand 20 is electrically connected to one of the plurality of branch switches 42. An electrical device 60 used in the dwelling unit 30 is electrically connected to the other branch switch 42 via a branch wiring routed in the dwelling unit 30.

  In addition, an energy management system (HEMS) for managing energy (electric power, gas, tap water, etc.) used in the dwelling unit 30 is introduced into the dwelling unit 30, and a HEMS controller 50 is installed. For example, the controller 50 measures power consumption for each of a plurality of branch circuits connected to the distribution board 40 and stores the measurement result in a memory (not shown) or displays it on a display (not shown). Or

  Further, in the present embodiment, the HEMS controller 50 causes the schedule information (for example, information on the departure place, the destination, the travel route, the departure date and time, the arrival date and time) about the use schedule of the electric vehicle 10 and the purchase of electric power from the commercial power source. I have price information about the price.

  The controller 50 includes a communication module that performs short-range wireless communication. When a user inputs schedule information using an input device such as a smartphone or a tablet terminal, the input schedule information is wirelessly transmitted from the input device to the controller 50. When the schedule information is wirelessly transmitted from the input device used by the user, the controller 50 stores the received schedule information in a memory (not shown). The controller 50 may include a man-machine interface such as a touch panel, and schedule information input by the user using the man-machine interface may be stored in the memory. Further, the controller 50 may acquire schedule information from the in-vehicle device 11 by communicating with the in-vehicle device 11 of the electric vehicle 10.

  Further, the controller 50 acquires price information from a server device of an electric power company via the Internet, for example, and stores it in a memory (not shown). FIG. 3 is a graph showing an example of price information held by the controller 50. In the illustrated example, the unit price of the electricity rate changes depending on the time zone, 10 yen per kWh from 23:00 to 7 o'clock, 20 yen per kWh in the time zone from 7 o'clock to 10 o'clock and from 17 o'clock to 23 o'clock From 10:00 to 17:00, it is 30 yen per kWh.

  Next, the configuration of the electric vehicle 10 will be described with reference to FIG. The electric vehicle 10 includes an in-vehicle device 11, a battery 12, a motor driving unit 13, and an electric motor 14. The in-vehicle device 11 includes a charge / discharge circuit 15, a microcomputer 16, a communication unit 17, and a storage unit 18.

  The battery 12 is a secondary battery such as a lithium ion storage battery, for example, and stores electric power for traveling.

  The motor drive unit 13 drives the electric motor 14 for traveling with the electric power stored in the battery 12 in accordance with the driving operation of the driver who drives the electric vehicle 10.

  The charging / discharging circuit 15 is a circuit that performs both charging to the battery 12 and discharging from the battery 12, and its operation is controlled by the microcomputer 16. The in-vehicle device 11 includes a receptacle connector CN2 to which a plug connector CN1 connected to an electric cable 21 from the charge / discharge stand 20 is detachably connected. In a state where the plug connector CN1 is connected to the receptacle connector CN2, the charging / discharging circuit 15 is electrically connected to the charging / discharging stand 20, and the charging / discharging circuit 15 is supplied with AC power supplied via the charging / discharging stand 20. Is converted into direct current, and the battery 12 is charged by a predetermined charging method. Further, the charging / discharging circuit 15 can supply the electric power discharged from the battery 12 to the dwelling unit 30 side via the charging / discharging stand 20, and operate the electric device 60 in the dwelling unit 30 with the electric power discharged from the battery 12. Can be made.

  The communication unit 17 has a wireless communication function for performing short-range wireless communication with the controller 50 installed in the dwelling unit 30. The controller 50 holds schedule information and price information, and the communication unit 17 receives schedule information and price information from the controller 50 by communicating with the controller 50.

  The storage unit 18 includes an electrically rewritable nonvolatile memory (for example, an EEPROM (Electrically Erasable and Programmable Read Only Memory) or a flash memory). In the storage unit 18, data is written and read by the microcomputer 16, and schedule information and price information acquired by the communication unit 17 are stored.

  The microcomputer 16 implements the functions of the information acquisition unit 16a, the charge / discharge determination unit 16b, the period setting unit 16c, and the charge / discharge control unit 16d by executing a built-in program. The electric vehicle 10 includes a large number of control microcomputers, and the microcomputer 16 is one of them.

  The information acquisition unit 16 a controls the communication unit 17 to perform communication with the controller 50 to acquire schedule information and price information from the controller 50, and stores the acquired schedule information and price information in the storage unit 18. save.

  The charge / discharge determination unit 16b obtains a necessary charge amount necessary for the next run based on the schedule information stored in the storage unit 18, and stores the remaining amount of charge and the required charge amount of the battery 12 acquired from the charge / discharge circuit 15. Compare high and low. The charge / discharge determination unit 16b obtains the charge amount for charging the shortage when the required charge amount exceeds the remaining power storage amount, and obtains the discharge amount for discharging the surplus when the necessary charge amount falls below the remaining power storage amount.

  If the charge / discharge determination unit 16b determines that charging is necessary, the period setting unit 16c purchases power until the next use start date and time (departure date and time) based on the schedule information and price information stored in the storage unit 18. The charging period is set so that charging is performed during a period when the price is lower. When the charge / discharge determination unit 16b determines that the surplus is discharged, the period setting unit 16c determines the purchase price until the next use start date and time based on the schedule information and price information stored in the storage unit 18. The discharge period is set to discharge during a more expensive period.

  The charge / discharge control unit 16d controls the operation of the charge / discharge circuit 15 according to the determination result of the charge / discharge determination unit 16b and the setting content of the period setting unit 16c.

  Next, the charging operation of the battery 12 by the charge / discharge management system of this embodiment will be described with reference to the flowchart of FIG.

  When charging the battery 12, the user parks the electric vehicle 10 in the vicinity of the charging / discharging stand 20, and connects the plug connector CN1 provided at the tip of the electric cable 21 to the receptacle connector CN2 of the electric vehicle 10 (step S1). ). When the plug connector CN1 is connected to the receptacle connector CN2, the charge / discharge circuit 15 detects that the electric cable 21 is connected because the signal level input via the receptacle connector CN2 changes, and the detection signal Is output to the microcomputer 16.

  When the microcomputer 16 detects that the electric cable 21 is connected based on the detection signal from the charge / discharge circuit 15, the microcomputer 16 causes the communication unit 17 to communicate with the controller 50 and acquire schedule information and price information from the controller 50. (Step S2).

  The communication unit 17 outputs the acquired schedule information and price information to the microcomputer 16, and the microcomputer 16 stores the schedule information and price information in the storage unit 18. Further, the charge / discharge determination unit 16b of the microcomputer 16 obtains a charge amount necessary for the next travel from the schedule information (step S3), and a predetermined additional amount (for example, 10% of the charge amount obtained from the schedule information). ) Is added as the required charge amount (step S4). The extra amount is 10% of the charge amount obtained from the schedule information, for example, but it is also preferable to consider that the required charge amount increases or decreases depending on the driver's driving habits or surrounding road conditions. That is, the charge / discharge determination unit 16b may learn the driving pattern of the driver and the change tendency of the remaining amount of power stored in the battery 12 to determine an additional amount.

  Next, the charge / discharge determination unit 16b acquires data on the remaining amount of charge of the battery 12 from the charge / discharge circuit 15 and compares the required charge amount obtained in step S4 with the remaining charge amount of the battery 12 (step S4). S5).

  When the required charge amount exceeds the remaining power storage amount in the determination in step S5 (Yes in step S5), the charge / discharge determination unit 16b determines that charging is necessary by the next travel and obtains the necessary charge amount. (Step S6). The period setting unit 16c obtains the required charging time required to charge the amount of charge obtained in step S6 based on the preset charging speed of the battery 12. Next, based on the price information stored in the storage unit 18, the period setting unit 16c can secure the required charging time until the next use start date and time, and can charge during a period when the power purchase price is lower. Thus, the charging period is set (step S7). For example, when the power purchase price is set as shown in FIG. 3, the time when the electric vehicle 10 is connected to the charging / discharging stand 20 is 21:00, the next use start date and time is 8:00 on the next day, and the required charging time is 6 hours. If so, the period setting unit 16c sets 0:00 to 6:00 on the next day as the charging period.

  When the current date and time obtained by the calendar function becomes the start date and time of the charging period, the microcomputer 16 controls the charging / discharging circuit 15 to start charging the battery 12. Thereafter, when the charging of the charging amount obtained in step S6 is completed, the microcomputer 16 controls the charging / discharging circuit 15 to end the charging of the battery 12 (step S8).

  Thus, if the battery 12 needs to be charged when the electric vehicle 10 is connected to the charging / discharging stand 20, the microcomputer 16 sets the charging period of the battery 12 based on the schedule information and the price information. Is charging automatically. Therefore, when the user uses the electric vehicle 10 next time, the battery 12 of the electric vehicle 10 is charged up to the amount of charge necessary for traveling, and thus the electric vehicle 10 cannot be used due to forgetting to charge. It becomes difficult.

  On the other hand, when the required charge amount is lower than the remaining power amount in the determination in step S5 (No in step S5), the charge / discharge determination unit 16b determines that there is a surplus in the charge amount, and the remaining power amount and the required charge From the difference from the amount, the amount of discharge that can be discharged until the next travel is obtained (step S9). The period setting unit 16c obtains a dischargeable time during which power can be supplied from the battery 12 based on the discharge amount obtained in step S9 and the average power consumption in the dwelling unit 30. Next, based on the price information stored in the storage unit 18, the period setting unit 16c allocates a dischargeable time so that the electricity purchase price is discharged in a more expensive period until the next use start date and time, A discharge period is set (step S10). For example, when the power purchase price is set as shown in FIG. 3, the time when the electric vehicle 10 is connected to the charge / discharge station 20 is 21:00, the next use start date and time is 18:00 on the next day, and the dischargeable time is 5 hours. If there is, the period setting unit 16c sets a period from 10:00 to 16:00 in which the unit price is 30 yen / kWh as the discharge period. The microcomputer 16 controls the charge / discharge circuit 15 to start discharging from the battery 12 when the current date and time obtained by the calendar function is the start date and time of the discharge period. The charging / discharging circuit 15 converts the DC power discharged from the battery 12 into alternating current, and supplies it to the power distribution system in the dwelling unit 30 via the charging / discharging stand 20, and the electric device 60 in the dwelling unit 30 starts from the battery 12. The discharged power can be used. Thereafter, when the discharge period ends or the discharge of the discharge amount obtained in step S9 is completed, the microcomputer 16 controls the charge / discharge circuit 15 to end the discharge of the battery 12 (step S11).

  In addition, when the power consumption in the discharge period is small and there is a surplus in the remaining amount of electricity stored at the end of the discharge period, the period setting unit 16c sets the power purchase price to a more expensive period until the next use start date and time. The discharge period may be reassigned so as to be discharged, and the discharge period may be reset.

  Further, the period setting unit 16c allocates the dischargeable time so that the electricity purchase price is discharged in a period when the power purchase price is more expensive based on the price information, but historical data of power demand in the dwelling unit 30 (for example, power demand The discharge period may be set in consideration of data that records changes over time.

  As described above, the charge / discharge management system according to this embodiment includes the information acquisition unit 16a, the charge / discharge determination unit 16b, the period setting unit 16c, and the charge / discharge control unit 16d. The information acquisition unit 16 a acquires schedule information about the scheduled use of the electric vehicle 10 that drives the electric motor 14 for traveling with the electric power stored in the battery 12, and price information about the power purchase price from the commercial power supply 100. . The charge / discharge determination unit 16b compares the necessary charge amount required for traveling determined from the schedule information with the remaining power storage amount of the battery 12. The charge / discharge determination unit 16b obtains a charge amount for charging the shortage with the power supplied from the commercial power source 100 when the required charge amount exceeds the remaining power storage amount, and the surplus amount when the required charge amount is less than the remaining power storage amount. The amount of discharge to discharge is obtained. When it is determined that the shortage is charged by the charge / discharge determination unit 16b, the period setting unit 16c is charged based on the schedule information and price information during a period when the power purchase price is less expensive until the next use start date and time. Set the charging period. If it is determined by the charge / discharge determination unit 16b that the surplus portion is discharged, the period setting unit 16c discharges the power purchase price in a more expensive period until the next use start date and time based on the schedule information and price information. Set the discharge period to. The charge / discharge control unit 16d controls both charging to the battery 12 and discharging from the battery 12 according to the determination result of the charge / discharge determination unit 16b and the setting content of the period setting unit 16c.

  Thereby, the charge / discharge determination unit 16b obtains the necessary charge amount necessary for traveling from the schedule information, compares the necessary charge amount with the remaining amount of charge of the battery 12, and if the remaining amount of charge is insufficient, the charge amount is stored. If there is a surplus in the remaining amount, the discharge amount is obtained. In the case of charging, the period setting unit 16c sets the charging period by the next use start date and time, so that the battery 12 of the electric vehicle 10 can be reliably charged by the next use start date and time. Since the period setting unit 16c sets the charging period so as to charge in the period when the power purchase price is cheaper until the use start date and time, the electricity charge for charging the battery 12 can be reduced. When there is a surplus in the remaining amount of electricity stored in the battery 12, the period setting unit 16c sets the discharge period so that the purchase price is discharged until the use start date and time is higher. By using the surplus, the electricity bill purchased from the commercial power source can be reduced. Therefore, the charge / discharge management system which can economically charge the electric vehicle 10 and use the electric power discharged from the electric vehicle 10 can be realized.

  In the charge / discharge management system of the present embodiment, the information acquisition unit 16a acquires schedule information and price information held by the controller 50 from the controller 50 that manages energy used by consumers. The user can input schedule information using the controller 50, and can input schedule information in the dwelling unit 30 without going to the electric vehicle 10.

  In the present embodiment, the charging / discharging stand 20 and the electric vehicle 10 are electrically connected via the electric cable 21. However, the charging / discharging stand 20 and the electric vehicle 10 receive and supply power without contact, respectively. You may make it perform.

  FIG. 2B shows a form in which power is received and supplied in a non-contact manner between the charge / discharge stand 20 and the electric vehicle 10. In the parking lot provided in the site of the dwelling unit 30, a first power supply / reception unit 22 that embeds power and supplies power in a non-contact manner by, for example, an electromagnetic induction method is embedded. On the other hand, the electric vehicle 10 is provided with a second power supply / reception unit 15a that receives and supplies power to and from the first power supply / reception unit 22 in a non-contact manner, for example, by an electromagnetic induction method. Since the first power supply / reception unit 22 and the second power supply / reception unit 15a perform power reception and power supply in a non-contact manner, charging the electric vehicle 10 and discharging from the electric vehicle 10 when the electric vehicle 10 is parked at a predetermined position. Is possible. The microcomputer 16 completes the operation of step S1 among the operations shown in the flowchart of FIG. 4 when the state in which power can be transferred between the second power supply / reception unit 15a and the first power supply / reception unit 22 continues for a certain period of time. It is determined that the process has been performed, and the processes after step S2 are performed.

  As described above, it is also preferable that the charge / discharge facility and the electric vehicle 10 each include a power supply / reception unit (first power supply / reception unit 22, second power supply / reception unit 15 a) that receives and supplies power without contact. If the electric vehicle 10 is parked at a position where power can be received and supplied between the first power supply / reception unit 22 and the second power supply / reception unit 15a, the battery 12 is automatically charged or discharged from the battery 12. It is possible to improve the usability by reducing the time and effort of the user.

  In the charge / discharge management system of the present embodiment, the information acquisition unit 16a, the charge / discharge determination unit 16b, the period setting unit 16c, and the charge / discharge control unit 16d are provided in the HEMS controller 50, and the electric vehicle 10 is connected to the HEMS side. You may judge charge and the discharge from the electric vehicle 10, or may set a charge period and a discharge period. In addition, the electric vehicle 10 and the charge / discharge station 20 can be connected to a computer network, and the information acquisition unit 16a, the charge / discharge determination unit 16b, the period setting unit 16c, and the charge / discharge control unit 16d are connected to the management device connected to the computer network. May be provided, and the management device may determine charging of the electric vehicle 10 and discharging from the electric vehicle 10 or may set a charging period and a discharging period.

  In the charge / discharge management system of the present embodiment, the schedule information is not limited to the use schedule until the next day, but a use schedule for a relatively long period such as a unit of several days or a week may be registered. For example, a user who uses the electric vehicle 10 only on weekends has registered a schedule for use only on weekends as schedule information, and has not registered a schedule for use on weekdays. In this case, there is no plan to use the electric vehicle 10 for several days from Sunday to Saturday, and it is sufficient that the battery 12 is charged with the required amount of charge just before use on Saturday. It can be used as a storage battery. That is, by charging the battery 12 during a period when the unit price is low and discharging from the battery 12 during the period when the unit price is high and using it at the dwelling unit 30 side, it is possible to reduce the electricity bill paid to the power company.

  Further, in the charge / discharge management system of the present embodiment, the battery 12 is charged with electric power supplied from the commercial power supply 100, but when a solar power generation device or a fuel cell is introduced into the dwelling unit 30, solar power generation The battery 12 may be charged with electric power generated by the device or the fuel cell. In that case, in the storage unit 18, as price information, not only the power purchase price from the commercial power source 100, but also the power sale price when the power generated by the solar power generation device is sold to the power company, the fuel cell Information on the gas charge, which is the fuel, is stored. And the period setting part 16c should just set a charging period and a discharge period so that the burden of the sum total of an electricity bill and a gas charge may become less based on schedule information and price information. In addition, if it is possible to sell the power stored in the battery 12 to the commercial power supply system, the period setting unit 16c may obtain more profits from the power sale based on the schedule information and the price information. In addition, a charging period and a discharging period may be set.

DESCRIPTION OF SYMBOLS 10 Electric vehicle 11 In-vehicle apparatus 12 Battery 14 Electric motor 15 Charging / discharging circuit 15a 1st power feeding / receiving part (power feeding / receiving part)
16 microcomputer 16a information acquisition unit 16b charge / discharge determination unit 16c period setting unit 16d charge / discharge control unit 20 charge / discharge stand 22 second power supply / reception unit (charge / discharge equipment, power supply / reception unit)
40 Distribution board 50 Controller 100 Commercial power supply

Claims (3)

An information acquisition unit for acquiring schedule information about a scheduled use of an electric vehicle that drives an electric motor for traveling with electric power stored in a battery, and price information about a power purchase price from a commercial power source;
Compare the required amount of charge required for travel determined from the schedule information and the remaining amount of electricity stored in the battery, and if the required amount of charge exceeds the remaining amount of stored electricity, charge the shortage with the power supplied from the commercial power supply A charge amount, a charge / discharge determination unit for obtaining a discharge amount for discharging a surplus when the required charge amount is less than the remaining power storage amount,
When it is determined by the charge / discharge determination unit that the shortage is charged, the charging period is set so that the purchase price is charged at a cheaper period until the next use start date and time based on the schedule information and the price information. When it is determined and the charge / discharge determination unit determines that the surplus is discharged, the purchase price is discharged during a period when the power purchase price is more expensive until the next use start date and time based on the schedule information and the price information. A period setting unit for setting the discharge period,
The charging / discharging control part which controls both the charge to the said battery and the discharge from the said battery according to the judgment result of the said charging / discharging judgment part and the setting content of the said period setting part was provided. Charge / discharge management system.   The charge / discharge management system according to claim 1, wherein the information acquisition unit acquires the schedule information and the price information held by the controller from a controller that manages energy used by a consumer. Both the operation of supplying electric power supplied from a commercial power source through a distribution system on the consumer side to the electric vehicle and the operation of receiving electric power discharged from the electric vehicle and supplying it to the distribution system are performed. Equipped with charging and discharging equipment,
The charge / discharge management system according to claim 1, wherein the charge / discharge facility and the electric vehicle each include a power supply / reception unit that receives and supplies power without contact.

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