JP2013051839A - Operation method selection device, battery operation system, operation method selection method, battery operation method, and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct the operation of a rechargeable battery more efficiently.SOLUTION: A computer, including a setting value storage part storing information regarding a rechargeable battery and evaluation indexes of an operation method of the rechargeable battery and a deterioration characteristic storage part storing information regarding the deterioration of the power storage capacity of the rechargeable battery. The computer reads the information from the setting value storage part and the deterioration characteristic storage part, calculates an evaluation index value, obtained when the rechargeable battery deteriorates according to the information regarding the deterioration, on the basis of the evaluation indexes, and selects the operation method of the rechargeable battery on the basis of the calculation result.

Description

  The present invention relates to a technique for performing operations such as charging and discharging of a storage battery.

  There is a growing interest and need for energy conservation using natural energy and energy saving. On the other hand, expectations for load leveling using storage batteries are also increasing. However, storage batteries are still expensive, and cost reduction is a development issue. In addition, deterioration of the capacity that can be charged and discharged by the charge and discharge cycle is also a major development issue. For this reason, research has been conducted on the operation of storage batteries in consideration of the characteristics (deterioration characteristics) that cause the capacity of the storage batteries to deteriorate.

  In general, when the charge end voltage is increased to increase the charging rate, deterioration of the storage battery is promoted and the life is shortened. For example, when the upper limit of SOC (State Of Charge) is set to 100%, deterioration of the storage battery is promoted. Further, even if the lower limit of the SOC is set to 0%, the deterioration is promoted. Therefore, as a recommended operation, the SOC range is set to 10 to 90% or 20 to 80% to suppress deterioration of the storage battery. As a specific example of the operation technique considering the deterioration characteristics of the storage battery, there is a technique disclosed in Patent Document 1.

Japanese Patent No. 4019734

However, if the SOC range of the storage battery is restricted unnecessarily, the life of the storage battery is extended, but there is a problem that the electric capacity that can be charged and discharged is reduced.
In view of the above circumstances, an object of the present invention is to provide a technique for operating a storage battery more efficiently.

  One aspect of the present invention is an operation method selection device that selects an operation method of a storage battery, a set value storage unit that stores information on the storage battery and an evaluation index of the operation method of the storage battery, and a storage capacity of the storage battery Degradation characteristic storage unit that stores information related to deterioration, and information when the storage battery is deteriorated according to the information related to deterioration based on the evaluation index, by reading information from the set value storage unit and the deterioration characteristic storage unit An operation method selection apparatus comprising: a calculation unit that calculates an index value; and a selection unit that selects an operation method of the storage battery based on a calculation result of the calculation unit.

  One aspect of the present invention is the operation method selection device, wherein the deterioration characteristic storage unit stores information on the deterioration for each type of the operation method, and the calculation unit includes the type of the operation method. The evaluation index value is calculated every time, and the selection unit selects an operation method from among the types of operation methods based on the evaluation index value.

  One aspect of the present invention is a battery operation system including the operation method selection device and a control unit that controls the storage battery according to the operation method selected by the selection unit.

  One aspect of the present invention is a computer comprising: a set value storage unit that stores information related to a storage battery and an evaluation index of an operation method of the storage battery; and a deterioration characteristic storage unit that stores information related to deterioration of the storage capacity of the storage battery. An operation method selection method for selecting an operation method of the storage battery, wherein the computer reads information from the set value storage unit and the deterioration characteristic storage unit, and according to the information on the deterioration based on the evaluation index An operation method selection method comprising: a calculation step of calculating an evaluation index value when the storage battery is deteriorated; and a selection step in which a computer selects an operation method of the storage battery based on a calculation result of the calculation step.

  One aspect of the present invention is a computer comprising: a set value storage unit that stores information related to a storage battery and an evaluation index of an operation method of the storage battery; and a deterioration characteristic storage unit that stores information related to deterioration of the storage capacity of the storage battery. An operation method selection method for selecting an operation method of the storage battery, wherein the computer reads information from the set value storage unit and the deterioration characteristic storage unit, and according to the information on the deterioration based on the evaluation index A calculation step of calculating an evaluation index value when the storage battery is deteriorated, a selection step in which a computer selects an operation method of the storage battery based on a calculation result of the calculation step, and a computer are selected by the selection step. A control step of controlling the storage battery according to the operated method. A.

  One aspect of the present invention is a computer comprising: a set value storage unit that stores information related to a storage battery and an evaluation index of an operation method of the storage battery; and a deterioration characteristic storage unit that stores information related to deterioration of the storage capacity of the storage battery. On the other hand, a calculation step of reading information from the set value storage unit and the deterioration characteristic storage unit, and calculating an evaluation index value when the storage battery is deteriorated according to the information on the deterioration based on the evaluation index; A computer program for causing the computer to execute a selection step of selecting an operation method of the storage battery based on a calculation result of the calculation step.

  One aspect of the present invention is the computer program according to claim 6, further causing the computer to execute a control step of controlling the storage battery according to the operation method selected in the selection step.

  By this invention, it becomes possible to operate a storage battery more efficiently.

It is a system configuration figure showing the system configuration of the storage battery system which is one embodiment of the present invention. It is a figure which shows the specific example of the deterioration characteristic table which a deterioration characteristic memory | storage part memorize | stores. It is a flowchart which shows an example of the flow of operation | movement of a battery operation apparatus. It is a figure showing the electric energy which can be charged / discharged per time of the storage battery in the period when the use period of a storage battery is 10 years. It is a figure showing the use amount period of a storage battery as 10 years, and the integrated discharge amount of a storage battery at the time of the period progress.

  FIG. 1 is a system configuration diagram showing a system configuration of a storage battery system 900 according to an embodiment of the present invention. The storage battery system 900 includes a battery operation device 200, a storage battery 300, a commercial power supply 600, and a private generator 700. The battery operation device 200 selects an operation method of the storage battery 300. The battery operation device 200 selects an operation method by selecting, for example, an SOC range. Then, the battery operation device 200 operates the storage battery 300 according to the selected operation method.

The storage battery 300 is a device that can store electricity by charging and can be used repeatedly as a battery, and may be configured in any way as long as the battery operation device 200 can control charging and discharging.
The commercial power source 600 is a device that supplies power supplied from the commercial system to the storage battery 300 and the load 800 via the battery operation device 200.

The private generator 700 is a device for generating power without the user of the storage battery system 900 purchasing power from a commercial system. For example, the private generator 700 is a device such as a PV (Photovoltaic) power generation (solar power generation) device or a wind power generation device.
The load 800 is an electric product used by a user of the storage battery system 900 and is an apparatus that operates by consuming electric power supplied from the storage battery 300 or the commercial power supply 600 via the control unit 201. The load 800 is, for example, a lighting fixture, a home appliance, or a computer.

  Next, the battery operation apparatus 200 will be described in detail. The battery operation apparatus 200 is configured using an information processing apparatus such as a mainframe, a workstation, a personal computer, or a set top box. The battery operation device 200 includes a CPU (Central Processing Unit), a memory, an auxiliary storage device, and the like connected by a bus, and executes a battery operation program. By executing the battery operation program, the battery operation device 200 functions as a device including the operation method selection device 100 and the control unit 201. Note that all or part of the functions of the battery operation device 200 may be realized using hardware such as an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA). . The battery operation program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in the computer system. The battery operation program may be transmitted via a telecommunication line.

The operation method selection device 100 selects an operation method of the storage battery 300. For example, the operation method selection apparatus 100 selects the SOC usage range.
The control unit 201 controls the charging of the storage battery 300 in accordance with the operation method selected by the operation method selection device 100 and all or part of the setting values stored in the setting value storage unit 102. When operation method selection apparatus 100 selects the SOC usage range, control unit 201 controls storage battery 300 to charge and discharge storage battery 300 within the selected SOC usage range. That is, the control unit 201 determines the storage capacity to start charging the storage battery 300 and the storage capacity to end charging of the storage battery 300 according to the selected SOC usage range, and controls charging and discharging. When charging the storage battery 300, the control unit 201 charges the storage battery 300 with power supplied from the commercial power supply 600 or the private generator 700. For example, when the number of times of charging / discharging performed per day is set as N as the set value, the control unit 201 performs control so that the number of times of charging / discharging of the storage battery 300 per day is N times. For example, when a one-day charging schedule is set as the set value, the control unit 201 controls charging of the storage battery 300 according to the schedule.

  The control unit 201 supplies power to the load 800 by discharging the storage battery 300. Control unit 201 supplies power supplied from commercial power supply 600 to load 800 when storage battery 300 cannot be discharged (for example, when the storage capacity of storage battery 300 is the minimum value of the SOC usage range). To do.

  The operation method selection apparatus 100 is configured using an information processing apparatus such as a mainframe, a workstation, a personal computer, or a set top box. The operation method selection apparatus 100 may be configured by hardware different from the hardware that implements the control unit 201, or may be configured entirely or partially by the same hardware.

  The operation method selection apparatus 100 includes a CPU, a memory, an auxiliary storage device, and the like connected by a bus, and executes an operation method selection program. By executing the operation method selection program, the operation method selection apparatus 100 functions as an apparatus including the input unit 101, the set value storage unit 102, the deterioration characteristic storage unit 103, the calculation unit 104, and the selection unit 105. Note that all or part of the functions of the operation method selection apparatus 100 may be realized using hardware such as an ASIC, PLD, or FPGA. The operation method selection program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in the computer system. The operation method selection program may be transmitted via a telecommunication line.

The input unit 101 is configured using an existing input device such as a keyboard, a pointing device (such as a mouse or a tablet), a button, or a touch panel. The input unit 101 is operated by a user when a set value is input to the operation method selection apparatus 100.
The set value storage unit 102 is configured using a storage device such as a semiconductor storage device or a magnetic hard disk device. The set value storage unit 102 stores the set value input by the input unit 101.

  The set value is information necessary for the operation method selection apparatus 100 to calculate an evaluation index value related to the operation method of the storage battery 300. The set value is, for example, information (evaluation index) when evaluating information related to the storage battery 300, information regarding use of the storage battery 300, and an operation method of the storage battery 300. The evaluation index is an index serving as a reference when selecting an operation method, and is, for example, an integrated discharge amount, an integrated power purchase amount, an energy self-sufficiency rate, a private generator effective utilization rate, an integrated utility cost, an integrated CO2 emission amount, or the like. .

  The content of the set value changes according to the evaluation index. For example, when the evaluation index is an integrated discharge amount, the set values are the initial maximum power storage capacity of the storage battery 300, the number of charge / discharge times per day, the scheduled use period of the storage battery 300, and the evaluation index. The initial maximum power storage capacity represents the maximum value of the power storage capacity in a state before the storage battery 300 deteriorates.

  The deterioration characteristic storage unit 103 is configured using a storage device such as a semiconductor storage device or a magnetic hard disk device. The deterioration characteristic storage unit 103 stores information related to the deterioration characteristic of the storage battery 300.

FIG. 2 is a diagram illustrating a specific example of the deterioration characteristic table stored in the deterioration characteristic storage unit 103. The deterioration characteristic table has a plurality of records 400. Each record 400 has a value of the SOC usage range and a value of the degree of capacity deterioration.
The value of the SOC usage range represents the minimum value and the maximum value of the storage capacity when charging the storage battery 300. For example, when the value of the SOC use range is 10 to 90%, charging is started when the storage capacity of the storage battery 300 reaches 10% of the maximum storage capacity at that time, and the storage capacity of the storage battery 300 is Indicates that charging is performed until 90% of the maximum storage capacity is reached. Note that the maximum storage capacity at that time represents the maximum storage capacity when the initial storage capacity has deteriorated in accordance with the period elapsed since the start of use of the storage battery 300. This value is calculated based on the initial maximum power storage capacity, the elapsed period, and the degree of capacity deterioration.

The degree of capacity deterioration is a value representing the degree of deterioration of the storage capacity of the storage battery 300. In the example of FIG. 2, the value of the degree of capacity deterioration represents a reduction rate of the maximum storage capacity of the storage battery 300 when charging / discharging once a day is repeated for one year. For example, when the degree of capacity deterioration is 4% / year, it indicates that the maximum power storage capacity is 96% after one year when charging / discharging once a day is repeated.
The values, the number of records 400, and the items of the records 400 shown in FIG. 2 are only specific examples. Therefore, the deterioration characteristic table may have other configurations as long as the deterioration characteristic of the storage battery 300 is expressed.

Returning to FIG. 1, the description of the operation method selection apparatus 100 will be continued.
Based on the set value stored in the set value storage unit 102 and the deterioration characteristic stored in the deterioration characteristic storage unit 103, the calculation unit 104 is a value indicating the superiority or inferiority of the evaluation index with respect to a plurality of SOC usage ranges (hereinafter, “ "Evaluation index value"). For example, the calculation unit 104 calculates an evaluation index value for each SOC usage range of the record 400 of the deterioration characteristic table stored in the deterioration characteristic storage unit 103.
The selection unit 105 selects the SOC usage range having the best evaluation index value based on the calculation result of the calculation unit 104 and the evaluation index stored in the set value storage unit 102.

  FIG. 3 is a flowchart showing an example of the operation flow of the battery operation apparatus 200. First, the user operates the input unit 101 to input a set value to the battery operation device 200 (step S101). The set value storage unit 102 stores the input set value. The calculation unit 104 reads the record 400 from the deterioration characteristic storage unit 103, and calculates an evaluation index value regarding the SOC usage range and the degree of capacity deterioration recorded in the read record (step S103). At this time, the calculation unit 104 reads the setting value stored in the setting value storage unit 102 and uses it for the calculation. When the calculation is completed, the calculation unit 104 determines whether the calculation has been completed for all the records 400 stored in the deterioration characteristic storage unit 103 (step S104). When the record 400 that has not been calculated remains (step S104—NO), the calculation unit 104 reads the record 400 that has not been calculated (step S102), and performs calculation on the read record 400 (step S103). .

  When the calculation is completed for all the records (step S104-YES), the selection unit 105 selects the SOC usage range with the best evaluation index value based on the calculation result (step S105). Then, control unit 201 starts charging / discharging control of storage battery 300 within the SOC usage range selected by selection unit 105 (step S106).

  FIG. 4 is a diagram showing the amount of power that can be charged / discharged once per storage battery 300 during that period, assuming that the scheduled use period of storage battery 300 is 10 years (hereinafter referred to as “charge / discharge amount”). When the storage battery 300 is continuously operated with the SOC use range set broadly (for example, 10 to 90%), the capacity deterioration is remarkable as compared with the case where the SOC use range is set narrow and the operation is continued. On the other hand, as the SOC usage range is narrower, capacity deterioration is suppressed. Therefore, although the amount of charge / discharge is initially highest when the SOC usage range is 10 to 90%, the charge / discharge amount is reversed from the case of the SOC usage range of 20 to 80% after the fifth year. Furthermore, when the SOC usage range is 10 to 90%, the charge / discharge amount is reversed from the case of SOC 30 to 70% with the elapsed year of 8 as a boundary. Thus, the charge / discharge amount is related to the SOC usage range and the elapsed years (elapsed period).

  FIG. 5 is a diagram showing the accumulated discharge amount of the storage battery 300 when the scheduled use period of the storage battery 300 is 10 years and the period has elapsed. The integrated discharge amount in FIG. 5 is an integrated value of the charge / discharge amount when the charge / discharge is repeated once a day during the scheduled use period. The graph on the side described as “no deterioration (ideal)” in FIG. 5 represents the integrated discharge amount when there is no deterioration in the maximum storage capacity of the storage battery 300. In this case, the maximum storage capacity of the storage battery 300 remains the initial maximum storage capacity regardless of the elapsed period. As a matter of course, when there is no deterioration, the wider the SOC usage range, the larger the integrated discharge amount.

However, in actuality, as described above, since the maximum storage capacity of the storage battery 300 is deteriorated according to the deterioration characteristics, the integrated discharge amount changes according to the deterioration. The graph on the side described as being deteriorated (actual) in FIG. 5 represents the integrated discharge amount when the maximum storage capacity of the storage battery 300 is deteriorated. Since the maximum storage capacity of the storage battery 300 decreases according to the elapsed period, the charge / discharge amount of the storage battery 300 also decreases accordingly. Therefore, the longer the scheduled use period is, the narrower the difference in the accumulated discharge amount between the wide SOC use range and the narrow SOC use range is, and in some cases reverses. In the case of FIG. 5, when the SOC usage range is 10 to 90%, the integrated discharge amount is slightly smaller than that when the SOC usage range is 20 to 80%.
Next, processing of the calculation unit 104 and the selection unit 105 will be described for each evaluation index.

[Integrated discharge amount]
First, processing of the calculation unit 104 and the selection unit 105 when the evaluation index is an integrated discharge amount will be described. In this case, the operation unit 104 calculates the integrated discharge amount at the time when the scheduled use period has elapsed based on the set value and the deterioration characteristic for each type of SOC usage range. For example, when the initial maximum power storage capacity M, the number N of charge / discharges per day, the scheduled use period of the storage battery 300 is Y, and the degree of capacity deterioration in a certain SOC usage range L% is X% / year, integrated discharge The amount A1 is calculated by the following equation 1. The value L represents the difference between the maximum value and the minimum value in the SOC usage range. For example, if the SOC usage range is 20% to 80%, L = 80−20 = 60.

  The selection unit 105 compares the integrated discharge amount A1 in each SOC use range, and selects the SOC use range having the largest value of the integrated discharge amount A1.

[Accumulated power purchase]
Next, processing of the calculation unit 104 and the selection unit 105 when the evaluation index is the accumulated power purchase amount will be described. The integrated power purchase amount is an integrated value of the amount of power purchased by the user of the storage battery 300 from the commercial system. An event in which a user purchases power from a commercial system occurs, for example, in the following situation. A situation in which a user of the storage battery 300 purchases power from a commercial system and charges the storage battery 300 during a time period when the unit price of power is low. The situation where the amount of power consumed by the user of the storage battery 300 is not sufficient for the amount of power discharged by the storage battery 300 alone.

  When the evaluation index is the accumulated power purchase amount, as setting values other than the evaluation index, for example, the initial maximum storage capacity of the storage battery 300, the daily charging schedule, the daily private power generation amount schedule, the charging speed of the storage battery 300, the storage battery 300 Are scheduled to be used, a schedule of power consumption required for one day, and the like. The daily charging schedule represents the timing of charging in a day. The daily private power generation amount schedule represents the amount of power generated by the private power generator 700 at each time. The charging speed of the storage battery 300 represents the amount of power that the storage battery 300 can charge per unit time. The schedule of the power consumption required for one day represents the power consumption of the load 800 at each time.

  At a certain time, when the power consumption amount of the load 800 is larger than the power amount (discharge power amount) that can be discharged from the storage battery 300, it is necessary to purchase power from the commercial system. Therefore, the maximum storage capacity of the storage battery 300 on a certain day, the daily charging schedule, the daily power generation schedule, the charging speed of the storage battery 300, and the schedule of power consumption required for the day Based on this, it is possible to calculate the amount of electric power discharged and the amount of electric power purchased at each time of the day. The integrated amount of the electric energy purchased in this way and the electric energy used for charging the storage battery 300 corresponds to the integrated electric power purchased. Note that the maximum storage capacity of the storage battery 300 on a certain day can be calculated based on the number of days, the deterioration characteristics, and the initial maximum storage capacity that have elapsed since the start of use of the storage battery 300. Therefore, the maximum storage capacity decreases as the capacity of the storage battery 300 deteriorates. Therefore, the amount of purchased power increases with deterioration.

Using the above-described calculation method, calculation unit 104 calculates the total amount of electric power purchased at the time when the scheduled use period has elapsed based on the set value and the deterioration characteristic for each type of SOC usage range.
Selection unit 105 compares the accumulated power purchase amount in each SOC use range, and selects the SOC use range having the smallest value of the accumulated power purchase amount.

[Energy self-sufficiency]
Next, processing of the calculation unit 104 and the selection unit 105 when the evaluation index is the energy self-sufficiency rate will be described. The energy self-sufficiency rate represents the ratio of power generated by the self-generator 700 that covers the power consumption of the load 800.

  When the evaluation index is the energy self-sufficiency rate, as setting values other than the evaluation index, for example, the initial maximum power storage capacity of the storage battery 300, the daily charging schedule, the daily self-power generation schedule, the charging speed of the storage battery 300, the storage battery 300 A scheduled use period, a schedule of power consumption required for one day, and the like are input. The daily charging schedule represents the timing of charging in a day. The daily private power generation amount schedule represents the amount of power generated by the private power generator 700 at each time. The charging speed of the storage battery 300 represents the amount of power that the storage battery 300 can charge per unit time. The schedule of the power consumption required for one day represents the power consumption of the load 800 at each time.

At a certain time, when the power consumption amount of the load 800 is larger than the power amount (discharge power amount) that can be discharged from the storage battery 300, it is necessary to purchase power from the commercial system. Therefore, the maximum storage capacity of the storage battery 300 on a certain day, the daily charging schedule, the daily power generation schedule, the charging speed of the storage battery 300, and the schedule of power consumption required for the day Based on this, it is possible to calculate the amount of electric power discharged and the amount of electric power purchased at each time of the day. The value obtained by integrating the amount of power purchased in this way over the scheduled use period of the storage battery 300 is the accumulated amount of power purchased. On the other hand, a value obtained by integrating the amount of power consumed over the scheduled use period of the storage battery 300 based on the schedule of the amount of power consumed necessary for one day is the accumulated power consumption. And an energy self-sufficiency rate (unit:%) is computable based on the following formula | equation.
Energy self-sufficiency rate = (Integrated power consumption-Integrated power purchase) / Integrated power consumption x 100

Note that the maximum storage capacity of the storage battery 300 on a certain day can be calculated based on the number of days, the deterioration characteristics, and the initial maximum storage capacity that have elapsed since the start of use of the storage battery 300.
The calculation unit 104 calculates the energy self-sufficiency rate at the time when the scheduled use period has elapsed based on the set value and the deterioration characteristic by the calculation method described above for each type of SOC usage range.
Selection unit 105 compares the energy self-sufficiency rate in each SOC use range, and selects the SOC use range having the highest value of the energy self-sufficiency rate.

[In-house generator effective utilization rate]
Next, processing of the calculation unit 104 and the selection unit 105 when the evaluation index is the private generator effective utilization rate will be described. The self-generator effective utilization rate is a value that represents the rate at which the user of the storage battery 300 has effectively utilized the power generated by the self-generator 700.

  When the evaluation index is a private generator effective utilization rate, as setting values other than the evaluation index, for example, the initial maximum storage capacity of the storage battery 300, the daily charging schedule, the daily private power generation amount schedule, the charging speed of the storage battery 300, A scheduled use period of the storage battery 300, a schedule of power consumption required for one day, and the like are input. The daily charging schedule represents the timing of charging in a day. The daily private power generation amount schedule represents the amount of power generated by the private power generator 700 at each time. The charging speed of the storage battery 300 represents the amount of power that the storage battery 300 can charge per unit time. The schedule of the power consumption required for one day represents the power consumption of the load 800 at each time.

When the storage capacity of the storage battery 300 is maximum at a certain time (when the SOC usage range is maximum), the storage battery 300 cannot be charged any further. Therefore, the electric power generated by the private generator 700 is discarded. Therefore, based on the maximum storage capacity of the storage battery 300 on a certain day, the daily charging schedule, the daily private power generation amount schedule, the charging speed of the storage battery 300, and the schedule of power consumption required for the day. The amount of discarded power at each time of the day can be calculated. A value obtained by integrating the discarded power amount calculated in this way over the scheduled use period of the storage battery 300 is the accumulated discarded power amount. Further, based on the daily power generation schedule of the day, the total power generation of the day can be calculated. A value obtained by integrating the total power generation calculated in this way over the scheduled use period of the storage battery 300 is the integrated private power generation power. Based on the following formula, the private generator effective utilization rate (unit:%) can be calculated.
Private generator effective utilization rate =
(Accumulated private power generation amount−Total discarded power amount) / Integrated private power generation amount × 100

Note that the maximum storage capacity of the storage battery 300 on a certain day can be calculated based on the number of days, the deterioration characteristics, and the initial maximum storage capacity that have elapsed since the start of use of the storage battery 300.
The calculation unit 104 calculates the private generator effective utilization rate at the time when the scheduled use period has elapsed based on the set value and the deterioration characteristic for each type of SOC usage range by the above-described calculation method.
The selection unit 105 compares the private generator effective utilization rate in each SOC usage range, and selects the SOC usage range having the highest private generator effective utilization value.

[Accumulated utility costs]
Next, processing of the calculation unit 104 and the selection unit 105 when the evaluation index is an integrated utility cost will be described. The integrated utility cost is an integrated value of the cost required when the user of the storage battery 300 purchases power from a commercial system.

  When the evaluation index is the integrated utility cost, as setting values other than the evaluation index, for example, the initial maximum storage capacity of the storage battery 300, the daily charging schedule, the daily private power generation schedule, the charging speed of the storage battery 300, the storage battery 300 The scheduled use period, the schedule of power consumption required for one day, the unit price of commercial power at each time of the day, and the like are input. The daily charging schedule represents the timing of charging in a day. The daily private power generation amount schedule represents the amount of power generated by the private power generator 700 at each time. The charging speed of the storage battery 300 represents the amount of power that the storage battery 300 can charge per unit time. The schedule of the power consumption required for one day represents the power consumption of the load 800 at each time.

  At a certain time, when the power consumption amount of the load 800 is larger than the power amount (discharge power amount) that can be discharged from the storage battery 300, it is necessary to purchase power from the commercial system. Therefore, the maximum storage capacity of the storage battery 300 on a certain day, the daily charging schedule, the daily power generation schedule, the charging speed of the storage battery 300, and the schedule of power consumption required for the day Based on this, it is possible to calculate the amount of electric power discharged and the amount of electric power purchased at each time of the day. Based on the amount of power purchased in this way and the unit price at the time of purchase, the cost of power purchased from the commercial grid on that day is calculated. A value obtained by integrating the costs calculated in this way over the scheduled use period of the storage battery 300 is an integrated utility cost. Note that the maximum storage capacity of the storage battery 300 on a certain day can be calculated based on the number of days, the deterioration characteristics, and the initial maximum storage capacity that have elapsed since the start of use of the storage battery 300. In addition, when purchasing electric power from a commercial system, if a basic monthly fee or a predetermined discount can be obtained, those values may also be used in the calculation.

The calculation unit 104 calculates the integrated utility cost for each type of the SOC usage range based on the set value and the deterioration characteristic, based on the set value and the deterioration characteristic, for each type of SOC usage range.
The selection unit 105 compares the integrated utility costs in each SOC use range, and selects the SOC use range having the smallest integrated utility cost value.

[Total CO2 emissions]
Next, processing of the calculation unit 104 and the selection unit 105 when the evaluation index is the integrated CO2 emission amount will be described. The integrated CO2 emission amount is an integrated value of CO2 (carbon dioxide) generated when the user of the storage battery 300 generates electric power purchased from a commercial system. An event in which a user purchases power from a commercial system occurs, for example, in the following situation. A situation in which a user of the storage battery 300 purchases power from a commercial system and charges the storage battery 300 during a time period when the unit price of power is low. The situation where the amount of power consumed by the user of the storage battery 300 is not sufficient for the amount of power discharged by the storage battery 300 alone.

  When the evaluation index is the integrated CO2 emission amount, as setting values other than the evaluation index, for example, the initial maximum power storage capacity of the storage battery 300, the daily charging schedule, the daily private power generation amount schedule, the charging speed of the storage battery 300, the storage battery 300 Are used, a schedule of power consumption required for one day, an amount of CO2 generated by power generation per unit (for example, 0.39 [kg-CO2 / kWh]), and the like. The daily charging schedule represents the timing of charging in a day. The daily private power generation amount schedule represents the amount of power generated by the private power generator 700 at each time. The charging speed of the storage battery 300 represents the amount of power that the storage battery 300 can charge per unit time. The schedule of the power consumption required for one day represents the power consumption of the load 800 at each time.

  When the amount of power consumption is larger than the amount of power that can be discharged by the storage battery 300 (discharge power amount) at a certain time, it is necessary to purchase power from a commercial system. Therefore, the maximum storage capacity of the storage battery 300 on a certain day, the daily charging schedule, the daily power generation schedule, the charging speed of the storage battery 300, and the schedule of power consumption required for the day Based on this, it is possible to calculate the amount of electric power discharged and the amount of electric power purchased at each time of the day. The integrated amount of the electric energy purchased in this way and the electric energy used for charging the storage battery 300 corresponds to the integrated electric power purchased. Then, the integrated CO2 emission amount can be calculated by multiplying the integrated power purchase amount by the amount of CO2 generated by the power generation per unit. Note that the maximum storage capacity of the storage battery 300 on a certain day can be calculated based on the number of days, the deterioration characteristics, and the initial maximum storage capacity that have elapsed since the start of use of the storage battery 300.

The calculation unit 104 calculates the integrated CO2 emission amount at the time when the scheduled use period has elapsed based on the set value and the deterioration characteristic for each type of the SOC use range by the above-described calculation method.
The selection unit 105 compares the integrated CO2 emission amount in each SOC use range, and selects the SOC use range having the smallest value of the integrated CO2 emission amount.

<Modification>
The battery operation device 200 and the operation method selection device 100 may be configured as hardware of different housings. In this case, the operation method selection apparatus 100 transmits the operation method selected by itself to the battery operation apparatus 200 by wired or wireless communication. The battery operation device 200 receives the operation method from the operation method selection device 100 and controls the storage battery 300 based on the received operation method. In this case, in one embodiment of the present invention, the battery operation device 200 and the operation method selection device 100 are combined to form a battery operation system. Note that the battery operation device 200 described above is only an aspect of the battery operation system, which is only a difference in whether or not the casing is the same.

The input unit 101 may be operated by the user when inputting not only the set value but also the deterioration characteristic to the operation method selection apparatus 100. In this case, the deterioration characteristic input by operating the input unit 101 is stored in the deterioration characteristic storage unit 103.
The selection unit 105 may be configured to select an SOC usage range other than the SOC usage range having the best evaluation index value based on conditions different from the evaluation index.

  The operation method selection apparatus 100 may be configured as an apparatus (evaluation index value calculation apparatus) that does not include the selection unit 105. The evaluation index value calculation device includes the above-described input unit 101, set value storage unit 102, deterioration characteristic storage unit 103, calculation unit 104, and output unit. The output unit outputs the calculation result by the calculation unit 104. The output unit may be configured, for example, using a communication device that transmits a calculation result to another information processing device. The output unit may be configured using an image display device such as a CRT (Cathode Ray Tube) display, a liquid crystal display, or an organic EL (Electro Luminescence) display, and may display a calculation result. The output unit may be configured as a printer that prints the calculation result. The output unit may be configured in any manner as long as it can output the calculation result.

The contents of the set value need not be limited to those described above, and may be other values.
The calculation processing of the calculation unit 104 for each evaluation index described above is an example, and each evaluation index value may be calculated by another calculation. For example, in Equation 1, the integrated discharge amount A is calculated on the assumption that deterioration occurs every year. However, a finer calculation may be performed on the assumption that deterioration occurs every month, every day, and every discharge.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Operation method selection apparatus, 200 ... Battery operation apparatus, 101 ... Input part, 102 ... Setting value memory | storage part, 103 ... Degradation characteristic memory | storage part, 104 ... Operation part, 105 ... Selection part, 201 ... Control part, 300 ... Storage battery , 400 ... record, 600 ... commercial power supply, 700 ... in-house generator, 800 ... load, 900 ... storage battery system

Claims (7)

An operation method selection device for selecting an operation method of a storage battery,
A set value storage unit for storing information on the storage battery and an evaluation index of an operation method of the storage battery;
A deterioration characteristic storage unit for storing information related to deterioration of the storage capacity of the storage battery;
An operation unit that reads information from the set value storage unit and the deterioration characteristic storage unit, and calculates an evaluation index value when the storage battery is deteriorated according to the information on the deterioration based on the evaluation index;
A selection unit that selects an operation method of the storage battery based on a calculation result of the calculation unit;
An operation method selection device comprising: The deterioration characteristic storage unit stores information on the deterioration for each type of the operation method,
The calculation unit calculates the evaluation index value for each type of operation method,
The selection unit selects an operation method from among the types of operation methods based on the evaluation index value;
The operation method selection apparatus according to claim 1. The operation method selection device according to claim 1 or 2,
A control unit for controlling the storage battery according to the operation method selected by the selection unit;
A battery operation system comprising: A computer comprising: a set value storage unit that stores information related to a storage battery and an evaluation index of an operation method of the storage battery; and a deterioration characteristic storage unit that stores information related to deterioration of the storage capacity of the storage battery. The operation method selection method to be selected,
A computer reads information from the set value storage unit and the deterioration characteristic storage unit, and calculates an evaluation index value when the storage battery is deteriorated according to the information on the deterioration based on the evaluation index;
A selection step in which the computer selects an operation method of the storage battery based on a calculation result of the calculation step;
Operation method selection method having A computer comprising: a set value storage unit that stores information related to a storage battery and an evaluation index of an operation method of the storage battery; and a deterioration characteristic storage unit that stores information related to deterioration of the storage capacity of the storage battery. The operation method selection method to be selected,
A computer reads information from the set value storage unit and the deterioration characteristic storage unit, and calculates an evaluation index value when the storage battery is deteriorated according to the information on the deterioration based on the evaluation index;
A selection step in which the computer selects an operation method of the storage battery based on a calculation result of the calculation step;
A control step in which the computer controls the storage battery according to the operation method selected in the selection step;
A battery operation method comprising: For a computer comprising a set value storage unit that stores information related to a storage battery and an evaluation index of an operation method of the storage battery, and a deterioration characteristic storage unit that stores information related to deterioration of the storage capacity of the storage battery,
A calculation step of reading information from the set value storage unit and the deterioration characteristic storage unit, and calculating an evaluation index value when the storage battery is deteriorated according to the information on the deterioration based on the evaluation index;
A selection step of selecting an operation method of the storage battery based on a calculation result of the calculation step;
A computer program for causing the computer to execute.   The computer program according to claim 6, further causing the computer to execute a control step of controlling the storage battery according to the operation method selected in the selection step.

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