JP2010268602A - Device for charging/discharging storage battery, and method for charging/discharging storage battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide options concerning electricity price, charging time periods, charging time, and electric power selling at the time of charging/discharging of a storage battery. <P>SOLUTION: A display/input part 2 receives an input of the restriction condition for charging/discharging. The electric power purchasing/selling price table storage part 12 in system power obtains the price information for the electric power selling and purchasing. The storage battery charging and discharging control/storage battery condition detection unit 7 obtains storage battery information. An optimum schedule calculation unit 11 prepares a charging/discharging schedule so as to satisfy the restriction condition based on the restriction condition, price information, and storage battery information. The charging/discharging control unit 3 performs charging/discharging of the storage battery based on the schedule prepared by the optimum schedule calculation unit 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a storage battery charging / discharging device and a storage battery charging / discharging method for charging / discharging a storage battery such as an electric vehicle and an electric motorcycle.

  In a conventional charging infrastructure for an electric vehicle, for example, a charging plug of the electric vehicle is simply connected to an outlet such as a building to charge a storage battery such as an electric vehicle. At this time, the electricity charge for charging the storage battery is calculated by the amount of power (kWh) required for charging and the electricity charge unit price at the time of charging.

  Moreover, in the conventional charge control device for a storage battery such as an electric vehicle, there is one that obtains an optimal time zone for charging the storage battery from information on the remaining charge of the storage battery and a recommended charging time zone (for example, Patent Document 1). In the charging control device described in Patent Literature 1, information on the recommended charging time zone is set in a time zone where the power unit price is low. According to the charging control device described in Patent Document 1, it is possible to avoid load concentration on the power supply side of the power system, the power supply facility, and the like by performing charging in an optimal time zone.

  In addition, there is a method for optimizing a charge / discharge plan based on cost and CO2 emission constraint conditions for a storage battery for power storage for a power plant.

JP 2008-67418 A

  In recent years, as the demand for electric motorcycles and electric vehicles is increasing, it is considered that the usage forms of electric vehicles and the like vary depending on users. Due to different usage forms, for example, charging at night, charging in a short time, different charging forms depending on the day, etc., the demands on the charging time zone and the time required for charging will also be different. It is done.

  On the other hand, in order to promote the use of renewable energy such as solar power generation and wind power generation, a system for selling power that sells power generated by consumers to electric power companies has been established. The amount of power generated by renewable energy varies depending on weather conditions such as sunlight and wind speed. Therefore, power storage technology has been studied for stable power supply. A storage battery such as an electric vehicle repeats charging and discharging. For example, electric power stored in a time zone in which the unit price of electricity is relatively low is discharged in another time zone, that is, sold for power storage. It is considered that it is economically viable to use it for the purpose.

  As described above, it is considered that various different demands arise for the charging / discharging method of a storage battery such as an electric vehicle, and it is required to provide the user with various options for the charging / discharging method. It is thought that However, in the prior art, a storage battery charging device for an electric vehicle or the like, or a service using the same, gives the user of the electric vehicle an option about an electric charge, a charging time zone, a charging time, or a power sale. I couldn't.

  The present invention has been made in consideration of the above circumstances, and is capable of providing a storage battery charge / discharge capable of providing options for an electric charge, a charge time zone and a charge time, or a power sale when charging / discharging the storage battery. An object is to provide a device and a storage battery charging / discharging method.

  The present invention includes an input unit that receives input of charge / discharge constraint conditions, a charge information acquisition unit that acquires charge information on power sale and purchase, a storage battery state detection unit that acquires storage battery information, and the constraint condition , Based on the fee information and the information on the storage battery, a schedule calculation unit that creates a charge / discharge schedule so as to satisfy the constraint conditions, and a charge / discharge of the storage battery based on the schedule created by the schedule calculation unit A storage battery charging / discharging device comprising:

  In addition, the present invention includes a display unit that displays a schedule created by the schedule calculation unit and a schedule used by another user, and the input unit is any one of the schedules displayed by the display unit. The storage battery charging / discharging device is characterized in that the charging / discharging control unit performs charging / discharging of the storage battery based on a schedule specified by the input received by the input unit.

  Moreover, the storage battery charging / discharging device of the present invention is characterized in that the display unit displays a schedule and a cost when charging / discharging is performed based on a schedule created by the schedule calculation unit.

  In addition, the present invention provides an input step in which the input unit receives input of charge / discharge restriction conditions, a charge information acquisition unit in which the charge information acquisition unit acquires power sale and power purchase fee information, and a storage battery state detection unit However, the storage battery state detection step for acquiring the storage battery information, and the schedule calculation unit, based on the constraint condition, the charge information, and the storage battery information, schedule the charging / discharging so as to satisfy the constraint condition. A storage battery charge / discharge method comprising: a schedule calculation step to be created; and a storage battery charge / discharge step in which the charge / discharge control unit charges and discharges the storage battery based on the schedule created in the schedule calculation step. .

  According to the present invention, the input unit accepts input of charge / discharge restriction conditions. In addition, a charge information acquisition unit acquires charge information for power sale and power purchase. Moreover, a storage battery state detection part acquires the information of a storage battery. In addition, the schedule calculation unit creates a charge / discharge schedule so as to satisfy the constraint condition based on the constraint condition, the charge information, and the storage battery information. Moreover, a charge / discharge control part charges / discharges a storage battery based on the schedule which the schedule calculating part created.

  Therefore, at the time of charging / discharging the storage battery, it is possible to provide options for electricity charges, charging time zone and charging time, or power sale.

It is the block diagram which showed the structure of the storage battery charging / discharging apparatus in one Embodiment of this invention. It is the figure which showed an example of the power purchase / power sale charge table of the system power which the power purchase / power sale charge table memory | storage part of the system power of this embodiment memorize | stores. It is the figure which showed an example of the storage battery specification table which the storage battery charging / discharging apparatus of this embodiment uses. It is the figure which showed an example of the past charging / discharging pattern table which past charging / discharging pattern DB of this embodiment memorize | stores. It is the flowchart which showed the flow of the process in the storage battery charging / discharging apparatus of this embodiment. It is the figure which showed an example of the display screen in step S103 of FIG. It is the figure which showed an example of the display screen in step S104 of FIG. 6 is a flowchart showing a process flow when “charge control” is selected in step S105 of FIG. 5. It is the figure which showed an example of the display screen in step S201 of FIG. It is the figure which showed an example of the display screen in step S204 of FIG. It is the figure which showed an example of the display screen in step S206 of FIG. It is the figure which showed an example of the display screen in step S210 of FIG. It is the figure which showed an example of the display screen in step S211 of FIG. It is the figure which showed an example of the display screen in step S213 of FIG. FIG. 9 is a flowchart showing a process flow of “process 0-1” in step S203 and “process 0-2” in step S204 of FIG. 8; 6 is a flowchart showing a process flow when “discharge control” is selected in step S105 of FIG. 5. FIG. 17 is a flowchart showing a process flow of “Process 1” in Step S404 of FIG. 17 is a flowchart showing a process flow of “Process 2” in Step S405 of FIG. 16. FIG. 19 is a flowchart showing a process flow of “Process 4” in Step S603 of FIG. 18; FIG. FIG. 17 is a flowchart showing a process flow of “Process 3” in Step S406 of FIG. It is the figure which showed an example of the display screen in step S703 of FIG. 9 is a flowchart showing a flow of “system power failure” processing called from step S212 in FIG. 8.

  Hereinafter, an embodiment of a storage battery charging / discharging device according to the present invention will be described with reference to the drawings. A storage battery charging / discharging device 100 in FIG. 1 includes a control unit 1, a display / input unit 2 (input unit, display unit), a charge / discharge control unit 3, a communication unit 4, a charging unit 5, and a system power input. / System electric power selling part 6 and storage battery charge / discharge control / storage battery state detection part 7 (storage battery state detection part). The control unit 1 includes a CPU (central processing unit), a storage device, an input / output device, and the like, and implements each function by executing a program for performing each process in the present embodiment. Control each part.

  The control unit 1 includes an optimal schedule calculation unit 11 (schedule calculation unit), a system power purchase / sale price table storage unit 12 (charge information acquisition unit), a similar pattern extraction unit 13, and a past charge / discharge pattern DB. (Database) 14. The optimal schedule calculation part 11 implement | achieves the function which calculates the optimal schedule of charging / discharging of a storage battery. Here, the optimal schedule is a charging / discharging schedule that satisfies the constraint conditions for a plurality of items specified by the user with all items or with some items that do not satisfy some of the items, At least one of the charge / discharge power amount, the remaining capacity after charge / discharge, and the charge / discharge end time (or charge / discharge time), and charge information related to the power selling / purchasing fee (expenditure at the time of charging, at the time of discharging (= power selling ) Means a charge / discharge plan that targets revenue). The grid power purchase / sale price table storage unit 12 stores a grid power purchase / sell price table. The similar pattern extraction unit 13 extracts charge / discharge patterns of similar optimal schedules used in the past. The past charge / discharge pattern DB 14 stores and manages the charge / discharge patterns of the optimum schedule used in the past. The grid power purchase / selling fee table storage unit 12 may acquire the grid power purchase / selling fee table from another device via the communication unit 4.

  The display unit / input unit 2 includes a touch panel or the like, and is controlled by the control unit 1 to receive an image display and an instruction input by a user.

  The charge / discharge control unit 3 is controlled by the control unit 1 and has a storage device for storing various types of information. The communication unit 4, the accounting unit 5, the system power input / system power selling unit 6, The storage battery charge / discharge control / storage battery state detection unit 7 is controlled. The charge / discharge control unit 3 is generated or extracted by the optimum schedule calculation unit 11 or the similar pattern extraction unit 13, and the charge / discharge of the storage battery is performed according to the charge / discharge pattern selected by the user from the charge / discharge pattern presented to the user. To control.

  The communication unit 4 communicates with a user's mobile phone terminal or a higher-level management device via a communication network such as the Internet to notify the completion of charging / discharging or notification of abnormal termination due to a power failure or a user stop instruction. And charging information and authentication information are transmitted and received between the charging unit 5 and the upper management device. In addition, the user accesses the communication unit 4 using a mobile phone terminal or the like, thereby browsing the same information displayed on the display unit / input unit 2 or inputting it to the display unit / input unit 2. The same instructions can be entered.

  The billing unit 5 provides a function for performing payment processing with a credit card, a mobile phone terminal, cash, electronic money (non-contact IC card) or the like. The charge / discharge control unit 3 starts charge or discharge (that is, power sale) control after the payment process by the charging unit 5 or the authentication process.

  The grid power input / system selling unit 6 converts grid power supplied from a power supply source such as a power company into DC power for charging a storage battery, or converts power discharged from the storage battery into AC power, Provides a function to sell power to power supply sources such as electric power companies.

  The storage battery charge / discharge control / storage battery state detection unit 7 includes an ECU (Engine Control Unit) communication unit 71 and a storage battery charge / discharge unit 72, and the storage battery charge / discharge control is performed according to the control of the charge / discharge control unit 3. And storage battery state detection. The ECU communication unit 71 performs wired or wireless communication with an ECU of an electric vehicle via an interface (I / F) of an automobile control system, and acquires information such as the vehicle type, storage battery specifications, and storage battery state of the electric vehicle. The storage battery charging / discharging unit 72 is connected to the charging / discharging terminal of the storage battery of the electric vehicle according to the control by the charging / discharging control unit 3, and charges the storage battery using the power supplied from the system power input / system power selling unit 6. Or the electric power discharged from the storage battery is output to the system power input / system power selling unit 6.

  With the above configuration, the storage battery charging / discharging device 100 can input the desired charging completion time, select the priority order of various conditions related to storage battery charging, and charge / recharge via the display / input unit 2 or the user's mobile phone terminal. Accepts input such as selection of discharge pattern. Further, at that time, the storage battery charging / discharging device 100 presents a similar pattern or provides information on various charging / discharging via the display / input unit 2 or the user's mobile phone terminal.

  Moreover, the storage battery charging / discharging apparatus 100 calculates an electricity bill and charging time as follows, for example. The control unit 1 of the storage battery charging / discharging device 100 calculates the charging time and the electricity bill from the priority item and the desired charging completion time as the constraint condition. In the calculation, optimization calculation is performed by linear programming or the like. More specifically, the system power purchase / sale charge table indicating the electricity charge unit price by time period in the charge period is read, whether or not the charge completion desired time is realized is determined, and the charge / discharge pattern is calculated.

  However, if the charging time does not end within the desired charging completion time, the fastest end time is displayed on the display unit / input unit 2 and the charging completion desired time is prompted again. When the charging can be completed at the desired charging completion time, the charging end time and the electricity charge are displayed on the display / input unit 2.

  And when the charging / discharging pattern to be used is selected by the user, the charging / discharging control part 3 of the storage battery charging / discharging apparatus 100 controls charging / discharging of a storage battery according to the selected charging / discharging pattern.

  In addition, the storage battery charging / discharging device 100 refunds part or all of the cash depending on the amount of charged power when the charging of the storage battery is not completed due to a power failure or the like as a refund function when charging is not completed. It also provides functions.

  Hereinafter, the information stored in the storage battery charging / discharging device 100 will be described with reference to FIGS.

  FIG. 2 is a diagram showing an example of a grid power purchase / sale price table stored in the grid power purchase / sell price table storage unit 12. In the example shown in the figure, the power purchase / sale price table 12a for the grid power is a unit price and a power sale price for each 24 hour period applied to weekdays during the period from July 1 to September 30. The unit price is shown. For example, the power receiving unit price for the time period from 0:00 to less than 1:00 is “r0”, and the power selling unit price is “s0”. The power receiving unit price and the power selling unit price in other time zones are as shown in the figure.

  FIG. 3 is a diagram illustrating an example of a storage battery specification table indicating information on storage batteries included in an automobile or the like. The storage battery specification table 711 is stored in a predetermined storage area (storage battery specification storage unit) in the charge / discharge control unit 3 (or control unit 1).

  The storage battery specification table 711 represents various information related to the specifications of the storage battery to be charged / discharged by a plurality of main parameters. This main parameter is information acquired from the ECU of the automobile by the ECU communication unit 71. In the illustrated example, as the main parameters, the storage battery rated capacity (kWh), the discharge upper limit power (kW), the discharge lower limit power (kW), the charge upper limit power (kW), the charge lower limit power (kW), and the discharge The upper limit electric energy (kWh), the discharge lower limit electric energy (kWh), the charge upper limit electric energy (kWh), the charge lower limit electric energy (kWh), the temperature correction formula, and the serious failure are used. The value of the storage battery rated capacity (kWh) is “c0h”. The values of the other main parameters are as shown in the figure.

  FIG. 4 is a diagram illustrating an example of a past charge / discharge pattern table stored in the past charge / discharge pattern DB 14. In the example shown in the figure, the past charge / discharge pattern table 14a is composed of fields of a charge / discharge execution date, a start time, an end time, a charge / discharge power amount, a storage battery model number, and a cost that have been executed in the past. It has a plurality of one record.

  In the illustrated example, 40 (kWh) is charged from 9:00 to 13:00 on February 1, 2009, the storage battery model number is “****”, and the charge is It is shown that it was 1000 yen. In addition, 20 (kWh) was charged from 8:00 to 11:00 on February 2, 2009, the storage battery model number was “****”, and the charge was 500 yen. It has been shown. Moreover, 10 (kWh) discharge (that is, power sale) is performed from 8:00 to 10:00 on February 3, 2009, and the storage battery model number is “****”, which is 300 yen. It was shown that there was an income.

  Next, a processing flow of the storage battery charging / discharging device 100 will be described with reference to FIG. FIG. 5 is a flowchart showing the flow of processing in the storage battery charging / discharging device 100.

  (Step S101) When the user (that is, the operator) of the storage battery charging / discharging device 100 performs charging / discharging of the storage battery of the electric vehicle, first, the ECU communication unit 71 and the electric vehicle are connected via the vehicle control system I / F. . When the vehicle control system I / F is connected to the electric vehicle, the EUC communication unit 71 receives vehicle type information of the connected electric vehicle, storage battery specification information, and storage battery state information from the EUC of the electric vehicle. . Thereafter, the process proceeds to step S102.

  The vehicle type information of the electric vehicle is information such as the name of the electric vehicle. The storage battery specification information is the information shown in the storage battery specification table 711 of FIG. The state information of the storage battery includes the rated capacity of the storage battery, the remaining capacity of the storage battery, and abnormality information of the storage battery indicating whether or not an abnormality has occurred in the storage battery.

  (Step S102) The charge / discharge control unit 3 (or the control unit 1 (hereinafter, the same)) has an abnormality in the storage battery based on the storage battery state information (storage battery abnormality information) received by the EUC communication unit 71 in step S101. Determine if you are waking up. If the charge / discharge control unit 3 determines that an abnormality has occurred in the storage battery, the process proceeds to step S103; otherwise, the process proceeds to step S104.

  (Step S103) The display / input unit 2 performs display such as a display screen E103 shown in FIG. The display screen E103 schematically shows information displayed on the display surface of the display unit / input unit 2 (or information displayed on the display unit of the user's mobile phone terminal (hereinafter the same)). In this case, the display screen E103 displays a character string of “storage battery state rated capacity at start of charging ○ kWh, remaining capacity ΔkWh abnormal storage battery temperature”. Since abnormality has occurred in the storage battery, the storage battery charging / discharging device 100 ends the process without performing charging / discharging.

  (Step S104) The display unit / input unit 2 performs display such as a display screen E104 shown in FIG. The display screen E104 schematically shows information displayed on the display surface of the display / input unit 2. In this case, the display screen E104 displays a character string of “storage battery state rated capacity at start of charging ○ kWh, remaining capacity ΔkWh no storage battery abnormality”. Thereafter, the process proceeds to step S105.

  (Step S105) The display / input unit 2 displays a charge / discharge control menu and allows the user to select the content of the process. The control unit 1 executes a process selected by the user. That is, the display unit / input unit 2 displays options of “charge”, “discharge”, and “stop” as the charge / discharge control menu. When “charge” is selected, the control unit 1 executes a “charge control” process (process after step S201 in FIG. 8 to be described later). When “discharge” is selected, the “discharge control” process ( The process after step S401 in FIG. 16 to be described later is executed, and when “CANCEL” is selected, the process ends.

  Next, the flow of the “charge control” process among the processes of the storage battery charging / discharging device 100 will be described. FIG. 8 is a flowchart showing a process flow when “charging control” is selected in step S105 of FIG.

  (Step S201) The display / input unit 2 displays a display screen E201 as shown in FIG.

  For example, as information (data 1) input as the constraint condition 0, “charging power amount”, “charging end date and time (or maximum charging time)”, “cost upper limit amount”, and “with power sale” / None ". In addition, when calculating the charge / discharge pattern of the optimal schedule, the “priority mode setting”, which is information for setting which condition is prioritized, includes “charging energy” and “charging end date / time (or maximum charging time). ) ”And“ cost control ”. In addition, as an example of “option” information that is a selective setting item, “CO2 suppression (service development such as point addition for CO2 suppression)” and “photovoltaic power generation facilities and fuel cells linked to charging facilities” When a distributed power source such as the above is available, priority is given to the power from the distributed power source.

  Here, the constraint condition 0 is a constraint condition before determining whether it can be established. For this reason, the constraint condition 0 may include a condition item that is not necessarily satisfied.

  FIG. 9 schematically shows a display screen displayed by the display / input unit 2 in step S201. On the display screen E201, “Charging condition Charging end date / time: month / day / day / hour / minute Charging electric energy: □□□□ kWh Remaining capacity after charging: □□□□□ kWh (○% of rated capacity) “Charging end date / time Cost limit” is displayed. Among these character strings, the symbols “◯”, “Δ”, and “□” represent character information whose contents change, change according to user input, or depending on the calculation result of the control unit 1. Change (the same applies hereinafter). When the input of the constraint condition 0 by the user is completed, the process proceeds to step S202 and step S203.

  (Step S202) The optimal schedule calculation unit 11 calculates a reference plan. The reference plan is a plan for selecting a charge / discharge pattern that is not constrained by the constraint condition 0 input by the user. For example, a constraint condition using a charge / discharge pattern that minimizes the cost, suppresses CO2 most, or minimizes the time, such as a cost suppression plan, a CO2 suppression plan, and a time suppression plan, is calculated. Or the plan (best practice) which many other users acquired via the communication part 4 selected can also be made into a reference plan. Thereafter, the process proceeds to step S206.

  (Step S203) In parallel with the process of step S202, the optimal schedule calculation unit 11 determines whether or not the constraint condition 0 is established as “process 0-1”. If the optimal schedule calculation unit 11 determines that the constraint condition 0 is satisfied as “impossible”, the process proceeds to step S204. If the optimal schedule calculation unit 11 determines that the constraint condition 0 is satisfied as “allowed”, the process proceeds to step S206. move on. Details of “Process 0-1” will be described later.

  (Step S204) The display / input unit 2 performs a display indicating that the constraint condition 0 cannot be established. Specifically, the display unit / input unit 2 displays, as “Process 0-2”, that the constraint condition 0 cannot be established and the constraint condition correction value that satisfies the priority mode (this is the constraint condition 1 )) Is performed. Details of “Process 0-2” will be described later.

  FIG. 10 schematically shows a display screen displayed by the display / input unit 2 in step S204. On the display screen E204, “Charging conditions Charging end date / time: month / day / day / hour / minute Charging power amount: □□□□ kWh Remaining capacity after charging: □□□□□ kWh (○% of rated capacity) → Display / selection of NG reference case Charging power amount satisfying the upper limit of cost Charging power amount, charging end date / time "is displayed. In this example, it is indicated that the condition “cost Δyen (upper limit oyen)” cannot be established (NG). Thereafter, the process proceeds to step S205.

  (Step S205) The display / input unit 2 performs a display prompting selection of “selection of constraint 1” or “re-input of constraint 0”. The user who sees the display performs an input for selecting either “select constraint 1” or “re-input constraint 0”. When the display / input unit 2 receives an input for selecting “select constraint 1”, the process proceeds to step S206, and the display / input unit 2 receives an input for selecting “re-input constraint 0”. If accepted, the process returns to step S201. However, in the subsequent processing, when the constraint condition 1 is selected, the constraint condition 1 is treated as the constraint condition 0.

  (Step S <b> 206) The display / input unit 2 performs a display indicating that the restriction condition 0 is satisfied. At that time, the display unit / input unit 2 performs a) charging condition setting: display of charging start / scheduled charging end time, display of charging electric energy, and b) presentation of a reference plan. Thereafter, the process proceeds to step S207.

  FIG. 11 schematically shows a display screen displayed by the display / input unit 2 in step S206. In the example shown in the figure, the display screen E206 displays “Charging conditions Charging end date / time: month / day / day / hour / minute Charging power amount: □□□□ kWh Remaining capacity after charging: □□□□□ kWh (○% of rated capacity) (Upper limit Yen) Display / selection of reference case Cost suppression cost, charging end date and time CO2 suppression cost, charging end date and time Time suppression cost, charging end date and time are displayed.

  (Step S207) The user selects one of the plan a), the plan b), and “change plan” displayed by the display unit / input unit 2 in Step S206. The optimal schedule calculation unit 11 determines whether the plan of a) or the plan of b) is selected by the user or “change plan” is selected. When the optimal schedule calculation unit 11 determines that the plan of a) or the plan of b) is selected by the user, the process proceeds to step S208, and when the optimal schedule calculation unit 11 determines that “change the plan” is selected. The process returns to step S201.

  (Step S208) The display / input unit 2 displays a screen that prompts the user to input whether to start or stop charging. The user uses the display / input unit 2 to input whether to start or stop charging. The optimal schedule calculation unit 11 determines whether to start or stop charging based on the input received by the display / input unit 2.

  When the optimum schedule calculation unit 11 determines to stop charging, the process is terminated. When the optimal schedule calculation unit 11 determines to start charging, the charge / discharge control unit 3 starts charging the storage battery based on the plan selected in step S207. Thereafter, the process proceeds to step S209.

  (Step S209) The charging / discharging control unit 3 controls the storage battery charging / discharging unit 72 to charge the storage battery, and acquires the information such as the voltage / current detected by the storage battery charging / discharging unit 72 and the ECU communication unit 71. Based on the information indicating the state of the storage battery, the charging completion determination is repeatedly performed. As items of the determination condition for determining the completion of charging, there are items of a scheduled charging end time and an amount of charging power. Moreover, the charge / discharge control part 3 repeatedly performs the confirmation of the presence or absence of storage battery abnormality.

  When the charge / discharge control unit 3 determines that “charging is not completed”, the process proceeds to step S210. Further, when the charge / discharge control unit 3 determines “abnormal storage battery”, the process proceeds to step S211. If the charge / discharge control unit 3 determines that “a power failure has occurred”, the process proceeds to step S212. If the charge / discharge control unit 3 determines that “charging is complete”, the process proceeds to step S213.

  (Step S210) The display / input unit 2 displays the progress of the charging status. Thereafter, the process proceeds to step S209. FIG. 12 schematically shows a display screen displayed by the display / input unit 2 in step S210. In this case, on the display screen E210, “charging start date / time: ○ month ○ day △ hour Δminute charging end date and time: ○ month ○ day △ hour △ minute current date and time: ○ month ○ day △ hour △ minute Charging cost: ○ yen Battery status at the start of charging Rated capacity ○ kWh, remaining capacity △ kWh Current storage battery status Charging power amount: □ □ □ □ □ kWh Remaining capacity: □ kWh (○% of the rated capacity) Has been.

  (Step S211) The display / input unit 2 displays storage battery abnormality. Thereafter, the process ends. FIG. 13 schematically shows a display screen displayed by the display / input unit 2 in step S211. In this case, the display screen E211 displays a character string of “battery state at the start of charging, rated capacity ○ kWh, remaining capacity ΔkWh storage battery temperature abnormality”.

  (Step S212) When a power failure occurs, the charge / discharge control unit 3 performs a charge interruption process associated with the occurrence of the power failure. Specifically, the charging condition is protected in the memory, and at the time of power recovery, for example, recalculation of whether or not the constraint condition is achieved is performed, or if the constraint condition is not achieved, a process of continuing charging until the initial charge end time is performed. In the present embodiment, the charge / discharge control unit 3 performs “system power failure” processing (processing after step S801 in FIG. 22 described later) after protecting the charging condition in the memory.

  (Step S213) The display / input unit 2 displays the end of storage charge and the state of the storage battery. Thereafter, the process proceeds to step S214. FIG. 14 schematically shows a display screen displayed by the display / input unit 2 in step S213. In the example shown in the figure, the display screen E213 displays “Charge start date / time: ** Month * day △ hour △ minute Charging end date / time: ** Month ** day △ hour △ minute Charging cost Discharge end date and time: ○ Month ○ Day △ hour △ minute Power sale profit Storage battery state at start of charging Rated capacity ○ kWh, remaining capacity △ kWh Storage battery state at end of charging Charged energy: □ kWh Remaining capacity: □ kWh (rated capacity ○% of battery) Abnormality of storage battery None Charged amount “Yen” is displayed.

  (Step S214) The charging unit 5 performs a charging process based on the charge amount. Thereafter, the process ends.

  Next, among the processes of the storage battery charging / discharging device 100, the process flow of “Process 0-1” in Step S203 and “Process 0-2” in Step S204 will be described. FIG. 15 is a flowchart showing the processing flow of “Process 0-1” in Step S203 and “Process 0-2” in Step S204 of FIG.

  (Step S301) The optimal schedule calculation unit 11 checks whether there is a solution by linear programming or the like. If there is a solution, the process ends. If there is no solution, the process proceeds to step S302. Specifically, the constraint condition 0 is described by a linear expression, and a process for obtaining a value having the maximum target value as a solution in the constraint condition is performed.

  (Step S302) The optimal schedule calculation unit 11 adjusts the charge / discharge power amount, that is, decreases the charge / discharge power amount by a predetermined amount, and searches for a solution. If there is a solution, the process proceeds to step S303, and if there is no solution, the process proceeds to step S304.

  (Step S303) The optimal schedule calculation unit 11 sets the solution searched in step S302 as the constraint condition 1, and ends the process.

  (Step S304) The optimal schedule calculation unit 11 adjusts the charging / discharging end date / time, that is, searches for a solution by delaying the charging / discharging end date / time by a predetermined amount. If there is a solution, the process proceeds to step S305, and if there is no solution, the process proceeds to step S306.

  (Step S305) The optimal schedule calculation unit 11 sets the solution searched in step S304 as the constraint condition 1 and ends the process.

  (Step S306) The optimal schedule calculation unit 11 sets a constraint condition that satisfies the cost constraint as the constraint condition 1, and ends the process.

  Next, the flow of the “discharge control” process among the processes of the storage battery charging / discharging device 100 will be described. FIG. 16 is a flowchart showing a processing flow when “discharge control” is selected in step S105 of FIG.

  (Step S401) The display / input unit 2 allows the user to input (input) the constraint condition 0. Here, the user inputs a constraint condition as shown as data D 401 to the display / input unit 2. In the example shown in the figure, the data D401 includes each item of “○ input item and priority mode setting discharge power amount discharge end date and time (or maximum discharge time) selling price lower limit amount”. Thereafter, the process proceeds to step S402.

  (Step S402) The charge / discharge control part 3 controls the ECU communication part 71, and acquires the state of a storage battery from ECU of an electric vehicle. The state of the storage battery as shown as data D402 is acquired from the ECU. In the illustrated example, the data D402 includes items of “absence / absence of abnormality of storage battery, rated capacity, remaining capacity, upper limit of discharge power, lower limit value of battery capacity during discharge”. Thereafter, the process proceeds to step S403.

  (Step S403) The display / input unit 2 presents the remaining storage battery capacity. For example, the display unit / input unit 2 displays each information of the remaining capacity ○ kWh, ○% of the rated capacity, and the distance ○ km that can travel at a speed of km / h. Thereafter, the process proceeds to step S404.

  (Step S404) Based on the information acquired from the ECU by the charge / discharge control unit 3, the optimum schedule calculation unit 11 sets a discharge amount that the storage battery discharges as “Process 1”. “Process 1” is a process after step S501 in FIG. 17 and will be described in detail later. Thereafter, the process proceeds to step S405.

  (Step S405) The optimal schedule calculation part 11 calculates a storage battery discharge pattern as "process 2". “Process 2” is a process after step S601 in FIG. 18 and will be described in detail later. In “Process 2” of step S405, after the storage battery discharge pattern is calculated, the user is prompted for an input for selecting whether or not to perform discharge with the calculated storage battery discharge pattern. The user performs an input indicating whether or not to perform discharge via the display / input unit 2.

  If the display / input unit 2 accepts the input selected when the discharge is performed, the process proceeds to step S405. Further, when the display / input unit 2 accepts an input selected not to perform discharge, the process ends.

  (Step S406) The charging / discharging control unit 3 controls the storage battery charging / discharging unit 72 and the system power input / system power selling unit 6 according to the storage battery discharge pattern set by the optimum schedule calculation unit 11 as “Process 3”. Discharge from storage battery. In addition, the charge / discharge control unit 3 controls the system power input / system power selling unit so that the power discharged from the storage battery is output to the power system side. “Process 3” is a process after step S701 in FIG. 20 and will be described in detail later. Thereafter, the process proceeds to step S407.

  (Step S407) The billing unit 5 performs a deposit process based on the discharge amount. Thereafter, the process ends.

  Next, among the processes of the storage battery charging / discharging device 100, the process flow of “Process 1” in Step S404 will be described. FIG. 17 is a flowchart showing a process flow of “process 1” in step S404 of FIG.

  (Step S501) Based on the power selling capacity input to the display / input unit 2 by the user and the state of the storage battery acquired from the EUC, the optimum schedule calculating unit 11 calculates the power selling capacity kWh and the remaining capacity kWh. And the travelable distance km. The display / input unit 2 displays “power selling capacity kWh”, “remaining capacity kWh, and travelable distance km” based on the result calculated by the optimum schedule calculating unit 11. Moreover, the display unit / input unit 2 displays an alert when the travelable distance is less than a certain distance, for example, less than 10 km, as a result of the calculation by the optimum schedule calculation unit 11. Thereafter, the process proceeds to step S502.

  (Step S502) The display / input unit 2 asks the user for an input to select whether or not to confirm the power selling capacity. The user performs an input indicating whether or not to confirm the power selling capacity via the display unit / input unit 2. When the display unit / input unit 2 receives an input indicating that the power selling capacity is to be determined, the process proceeds to step S503. When the display unit / input unit 2 receives an input indicating that the power selling capacity is not fixed, the process returns to step S501.

  (Step S503) The user inputs (inputs) an option at the time of a system power failure via the display / input unit 2. Options include, for example, whether or not the discharge end time is extended, and the maximum extension time when there is extension. The display / input unit 2 receives an input of information indicating an option input by the user. Thereafter, the process ends.

  Next, among the processes of the storage battery charging / discharging device 100, the process flow of “Process 2” of S405 will be described. FIG. 18 is a flowchart showing the process flow of “Process 2” in Step S405 of FIG.

  (Step S <b> 601) The optimal schedule calculation unit 11 reads the grid power purchase / sell price table from the grid power purchase / sell price table storage unit 12. Thereafter, the process proceeds to step S602.

  (Step S602) The optimal schedule calculation unit 11 calculates a power sale schedule that maximizes the power sale price by a) linear programming or the like. At this time, the optimal schedule calculation unit 11 obtains the upper limit value of the discharge power and the lower limit value of the battery capacity during discharge obtained by the ECU communication unit 71 from the ECU, and the value received by the display unit / input unit 2 as input. The discharge capacity is read as data D602 and the power sale schedule is calculated. Thereafter, the process proceeds to step S603.

  (Step S <b> 603) The optimal schedule calculation unit 11 performs “processing 4” and b) extracts a reference plan. “Process 4” is a process after step S6031 in FIG. 19 and will be described in detail later. Thereafter, the process proceeds to step S604.

  (Step S604) The display / input unit 2 displays the plans a) and b) calculated or extracted in steps S602 and S603. For example, when the display unit / input unit 2 receives input of the discharge end time and the power sale capacity, the “power sale capacity kWh”, “remaining capacity kWh, travelable distance km”, and travelable distance (for example, less than 10 km) Alert display), and the estimated revenue from power sales. Thereafter, the process proceeds to step S605.

  (Step S605) The display / input unit 2 asks the user for an input for selecting whether or not to perform discharge. The user performs an input indicating whether or not to perform discharge via the display / input unit 2. When the display / input unit 2 receives an input indicating that the discharge is to be performed, the process is terminated (the discharge is performed in step S405 in FIG. 16). When the display / input unit 2 receives an input indicating that the discharge is not performed, the process proceeds to step S606.

  (Step S606) The display / input unit 2 receives an input of the amount of power to be discharged. The optimum schedule calculation unit 11 performs a discharge power change process based on the input electric energy to be discharged. Thereafter, the process proceeds to step S607.

  (Step S607) The optimal schedule calculation part 11 receives the input of the time which complete | finishes discharge. The optimal schedule calculation unit 11 executes a discharge end time changing process based on the input time to end the discharge. After that, when the discharge power or the discharge end time is changed in step S606 or step S607, the process returns to the start of “Process 2” (step S601), and the discharge power and the discharge end time are not changed in step S606 and step S607. In this case, the “discharge control” process shown in FIG. 16 is terminated (“discharge is not performed” in step S405 in FIG. 16).

  Next, among the processes of the storage battery charging / discharging device 100, the process flow of “Process 4” of S603 will be described. FIG. 19 is a flowchart showing a process flow of “process 4” in step S603 of FIG.

  (Step S6031) The similar pattern extraction unit 13 performs a similar pattern extraction process. Specifically, the similar pattern extraction unit 13 extracts a past charge / discharge pattern that satisfies a necessary condition from the past charge / discharge pattern DB 14. A necessary condition is a pattern that is the same power purchase / selling fee as the current power purchasing / selling fee. It should be noted that the power purchase / selling fee of the past charge / discharge pattern can be specified from the “implementation date” of the past charge / discharge pattern table and the power purchase / power selling fee table of the system power. Other examples of extraction include sorting at the start time, extracting in ascending order of the start time, and extracting frequent patterns. Thereafter, the process proceeds to step S6032.

  (Step S6032) The display / input unit 2 displays the discharge pattern extracted by the similar pattern extraction unit 13. Thereafter, the process ends.

  Next, among the processes of the storage battery charging / discharging device 100, the process flow of “Process 3” of S406 will be described. FIG. 20 is a flowchart showing a process flow of “Process 3” in Step S406 of FIG.

  (Step S701) The display / input unit 2 asks the user for an input to select whether or not to start discharging. The user performs an input indicating whether or not to start discharging via the display / input unit 2. When the display / input unit 2 receives an input indicating that the discharge is started, the process proceeds to step S702. When the display / input unit 2 receives an input indicating that the discharge is not started, the process is terminated.

  (Step S <b> 702) The charge / discharge control unit 3 performs discharge completion determination based on information acquired from the storage battery charge / discharge control / storage battery state detection unit 7 and information acquired from the system power input / system power charging unit 6. Specifically, it is determined that the discharge has been completed when the constraint conditions such as the scheduled discharge end time and the amount of discharge power are satisfied, and otherwise, it is determined that the discharge has not been completed. When the charge / discharge control unit 3 determines that the discharge has been completed, the process ends. When the charge / discharge control unit 3 determines that the discharge has not been completed, the process proceeds to step S703.

  (Step S703) The display / input unit 2 displays the amount of discharge power. Thereafter, the process returns to step S702. FIG. 21 schematically shows a display screen displayed by the display / input unit 2 in step S703. In the example shown in the figure, the display screen E703 displays “discharge start date and time: ○ month ○ day Δ hour Δ minute discharge end date and time: ○ month ○ day Δ hour Δ minute current date and time: ○ month ○ day Δ hour Δ minute. ○ Circle Battery state at the start of discharge Rated capacity ○ kWh, remaining capacity ΔkWh Current storage battery state Charging power amount: □□□ kWh Remaining capacity: □□□ kWh (○% of rated capacity) ”is displayed.

  Next, among the processes of the storage battery charging / discharging device 100, a process flow of “system power failure” will be described. FIG. 22 is a flowchart showing the flow of the “system power failure” process called from step S212 of FIG.

  (Step S801) The charge / discharge control unit 3 determines whether or not a certain power outage duration (for example, 60 seconds) has occurred. If the charge / discharge control unit 3 determines that a certain power outage duration has occurred, the process proceeds to step S802, and otherwise the process ends.

  (Step S <b> 802) The charge / discharge control unit 3 acquires information indicating the storage battery state from the ECU via the ECU communication unit 71. Thereafter, the process proceeds to step S803.

  (Step S <b> 803) The charge / discharge control unit 3 determines whether or not the charge power amount or the discharge power amount can be satisfied by the current charge plan (current charge / discharge schedule) by the charge end time or the discharge end time. If the charge / discharge control unit 3 determines that the charge power amount or the discharge power amount can be satisfied, the process is terminated, and the process proceeds to step S804 otherwise.

  (Step S804) The charge / discharge control unit 3 determines whether the charge power or the discharge power can be increased. If the charge / discharge control unit 3 determines that the power can be increased, the process proceeds to step S805, otherwise the process proceeds to step S806.

  (Step S805) The charge / discharge control unit 3 increases the charge or discharge power within the specification range of the storage battery and the charger / discharger, and sets the charge power / discharge power so as to approach the planned charge power or discharge power by the end of power sale. To charge and discharge. Thereafter, the process ends.

  (Step S806) The charge / discharge control unit 3 continues to charge or discharge the planned amount of power until the power sale end time (best effort). Thereafter, the process ends.

  As described above, according to the present embodiment, when charging / discharging the storage battery, it is possible to provide options for the electricity bill, the charging time zone, the charging time, or the power sale. In addition, it is possible to present appropriate options for the user to present appropriate information and to set the charge / discharge pattern. Therefore, it is possible to determine an optimum charge / discharge pattern in terms of cost or charge / discharge time according to the difference in the electricity charge depending on the time zone and the charge / discharge time allowed by the user. At that time, the maximum charge power amount and the charge completion time can be presented to the target cost, or the minimum cost and the charge completion time can be presented to the target charge power amount.

  Moreover, information can be provided about cost in the case of charging / discharging of a storage battery. In addition, it is possible to easily set conditions with priorities for the charge / discharge time zone and the charge / discharge time. In addition, the end time of charging / discharging can be easily set. In addition, it is possible to provide convenience such as the ability to set in detail the conditions when the electric power company purchases the discharge of the storage battery.

  In addition, when it becomes possible to use late-night power by extending the charging time, the electricity charge can be reduced. Moreover, although the electricity bill may be increased, charging can be completed in the shortest time. In addition, by entering the desired charging completion time, the most inexpensive charging pattern can be determined and an economical electric charge can be obtained. Moreover, if it becomes possible for the electric power company to purchase the discharge from the storage battery, it is possible to expect further increase in cost merit related to the electricity bill by allowing the discharge of the storage battery by the user's option. be able to.

  The embodiment of the present invention is not limited to the above, and in the configuration shown in FIG. 1, the blocks are divided, integrated, or distributed through a communication line or the like. It can be performed appropriately. Furthermore, the present invention can be configured using a computer and peripheral devices and a program executed by the computer, and the program can be provided via a computer-readable recording medium or a communication line.

  Further, the present invention is not limited to charge / discharge control of a storage battery such as an electric vehicle, and can also be applied to, for example, an outlet with a time timer, an outlet that is energized in advance only during a time period when the electricity rate is low. Alternatively, the present invention can be applied to an electricity rate limiting outlet, an outlet that stops power supply when a preset electricity rate is reached. In addition, the present invention can be applied to various household electric appliances (regardless of the merit of scale. For example, an electric shaving device having a storage battery, a mobile phone terminal, a portable game device, a portable audio player, etc.).

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. Is possible.

  DESCRIPTION OF SYMBOLS 1 ... Control part, 2 ... Display part / input part, 3 ... Charge / discharge control part, 4 ... Communication part, 5 ... Charge part, 6 ... Grid power input / system power sale part, 7 ... Storage battery charge / discharge control / storage battery State detection unit, 11 ... Optimal schedule calculation unit, 12 ... Grid power purchase / selling fee table storage unit, 12a ... Grid power purchase / selling fee table, 13 ... Similar pattern extraction unit, 14 ... Past charge Discharge pattern DB, 14a ... past charge / discharge pattern table, 100 ... storage battery charge / discharge device, 711 ... storage battery specification table

Claims (4)

An input unit for receiving input of charge / discharge constraint conditions;
A charge information acquisition unit for acquiring power sale and power purchase charge information;
A storage battery state detection unit for acquiring storage battery information;
A schedule calculation unit that creates a charge / discharge schedule so as to satisfy the constraint condition based on the constraint condition, the charge information, and the storage battery information;
A charge / discharge control unit that charges and discharges a storage battery based on the schedule created by the schedule calculation unit;
A storage battery charging / discharging device comprising: A display unit for displaying a schedule created by the schedule calculation unit and a schedule used by another user;
The input unit accepts an input specifying any one of the schedules displayed by the display unit;
The storage battery charging / discharging device according to claim 1, wherein the charging / discharging control unit performs charging / discharging of the storage battery based on a schedule specified by an input received by the input unit. The storage battery charging / discharging device according to claim 2, wherein the display unit displays a schedule and a cost when charging / discharging is performed based on the schedule created by the schedule calculation unit. An input step for receiving an input of charge / discharge restriction conditions;
A charge information acquisition unit for acquiring charge information of power sale and power purchase,
A storage battery state detection unit acquires storage battery information, a storage battery state detection step,
A schedule calculation step for creating a charge / discharge schedule so as to satisfy the constraint condition based on the constraint condition, the charge information, and the storage battery information;
A storage battery charge / discharge step in which the charge / discharge control unit charges / discharges the storage battery based on the schedule created in the schedule calculation step;
A method for charging and discharging a storage battery, comprising:

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