Charge / discharge control device, charge / discharge control method and program

Abstract

To provide a charge / discharge control device, a charge / discharge control method and a program, which can respond to request input / output.SOLUTION: A charge / discharge control device includes: a charge / discharge control unit for controlling charge / discharge of a battery within a standard use range; a request acquirement unit for acquiring request input / output and request time to a power system; a predicted full charge capacity calculation unit which calculates current predicted full charge capacity which is full charge capacity of the battery, which is predicted to change with request time when the battery is charged / discharged beyond the standard use range so as to meet request input / output and request time; and a full charge capacity determination unit for determining whether current predicted full charge capacity exceeds a target full charge capacity line which is information that determines target full charge capacity at every operation time. When current prediction full charge capacity exceeds the target full charge capacity line, the charge / discharge control unit controls charge / discharge of the battery beyond the standard use range.SELECTED DRAWING: Figure 20

Description

[Technical field]

[0001] The present disclosure relates to a charge / discharge control device, a charge / discharge control method, and a program. [Background technology]

[0002] 2. Description of the Related Art It is known that a storage battery can be discharged under predetermined conditions to supply power to a house or the like.

[0003] For example, Patent Document 1 discloses a power supply system that controls the discharge of a storage battery. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-48348 A Summary of the Invention [Problem to be solved by the invention]

[0005] The power supply system disclosed in Patent Document 1 controls the charging and discharging of a plurality of storage batteries by taking into consideration the discharge amount or discharge history of the storage batteries. However, using a storage battery whose charging and discharging is controlled within a standard usage range, which is a range set to satisfy a target battery life, may make it difficult to satisfy the required input / output and required time due to the limitations of the standard usage range. Therefore, even if one tries to meet the needs for input / output and input / output time by charging and discharging the storage battery, it is difficult to meet the required input / output and time.

[0006] An object of the present disclosure is to provide a charge / discharge control device, a charge / discharge control method, and a program that can meet required input / output and required time. [Means for solving the problem]

[0007] The charge / discharge control device disclosed herein comprises a charge / discharge control unit that controls charging and discharging of a battery within a standard usage range; a request acquisition unit that acquires a required input / output to a power grid and a required time; a predicted full charge capacity calculation unit that calculates a current predicted full charge capacity, which is the full charge capacity of the battery that is expected to change with the required time when the battery charges or discharges beyond the standard usage range to satisfy the required input / output and the required time; and a full charge capacity determination unit that determines whether the current predicted full charge capacity exceeds a target full charge capacity line, which is information that defines a target full charge capacity for each operating time, and the charge / discharge control unit controls charging and discharging of the battery beyond the standard usage range when the current predicted full charge capacity exceeds the target full charge capacity line.

[0008] The charge / discharge control method disclosed herein includes the steps of performing charge / discharge control of a battery within a standard usage range, acquiring a required input / output to a power grid and a required time, calculating a current predicted full charge capacity, which is the full charge capacity of the battery that is expected to change with the required time when the battery performs charge / discharge beyond the standard usage range to satisfy the required input / output and the required time, and determining whether the current predicted full charge capacity exceeds a target full charge capacity line, which is information that defines a target full charge capacity for each operating time. In the step of performing charge / discharge control, if the current predicted full charge capacity exceeds the target full charge capacity line, charge / discharge control of the battery is performed beyond the standard usage range.

[0009] The program disclosed herein causes a computer to execute the steps of: controlling the charging and discharging of a battery within a standard usage range; acquiring a required input / output to a power grid and a required time; calculating a current predicted full charge capacity, which is the full charge capacity of the battery that is expected to change with the required time when the battery charges or discharges beyond the standard usage range to satisfy the required input / output and the required time; and determining whether the current predicted full charge capacity exceeds a target full charge capacity line, which is information that defines a target full charge capacity for each operating time. In the step of performing charge and discharge control, if the current predicted full charge capacity exceeds the target full charge capacity line, charge and discharge control of the battery is performed beyond the standard usage range. Effect of the Invention

[0010] According to the charge / discharge control device, charge / discharge control method, and program of the present disclosure, it is possible to meet requested input / output. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a block diagram of an output system according to the first embodiment. [Diagram 2] FIG. 2 is a block diagram of a charge / discharge control device according to the first embodiment. [Diagram 3] FIG. 2 is an explanatory diagram of a standard use range in the present disclosure. [Figure 4] FIG. 2 is an explanatory diagram of current forecast revenue in the present disclosure. [Diagram 5] FIG. 4 is an explanatory diagram of a currently predicted full charge capacity in the present disclosure. [Figure 6] 4 is a flowchart of a charge / discharge control method according to the first embodiment. [Figure 7] FIG. 11 is a block diagram of an output system according to a second embodiment. [Figure 8] FIG. 11 is a block diagram of a charge / discharge control device according to a second embodiment. [Figure 9] FIG. 2 is an explanatory diagram of an operational range in the present disclosure. [Figure 10]FIG. 11 is an explanatory diagram of an operational range in the second embodiment. [Figure 11] FIG. 11 is an explanatory diagram of an operational range in the second embodiment. [Figure 12] 10 is a flowchart of a charge / discharge control method according to a second embodiment. [Figure 13] FIG. 13 is a block diagram of an output system according to a third embodiment. [Figure 14] FIG. 11 is a block diagram of a charge / discharge control device according to a third embodiment. [Figure 15] FIG. 13 is an explanatory diagram of an operational range in the third embodiment. [Figure 16] FIG. 13 is an explanatory diagram of an operational range in the third embodiment. [Figure 17] 13 is a flowchart of a charge / discharge control method according to a third embodiment. [Figure 18] 13 is a flowchart of a charge / discharge control method according to a fourth embodiment. [Figure 19] FIG. 13 is a block diagram of an output system according to a fifth embodiment. [Figure 20] FIG. 13 is a block diagram of a charge / discharge control device according to a fifth embodiment. [Figure 21] 13 is a flowchart of a charge / discharge control method according to a fifth embodiment. [Figure 22] FIG. 13 is an explanatory diagram of a standard use range in a modified example. [Diagram 23] FIG. 13 is an explanatory diagram of a standard use range in a modified example. [Figure 24] FIG. 13 is an explanatory diagram of a standard use range in a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, each embodiment of the present disclosure will be described with reference to the drawings. Note that the drawings and specific configurations used in each embodiment should not be used to interpret the disclosure. The same or corresponding configurations in all drawings are given the same reference numerals, and common descriptions are omitted.

[0013] First Embodiment A first embodiment according to the present disclosure will be described below with reference to FIGS.

[0014] (Output system configuration) As shown in FIG. 1, the output system 10B includes a power storage system 1, a charge / discharge control device 2B, a power generation system 4, a power grid 5, and a command unit 6. The output system 10B is a system that takes into consideration the price at which electricity is sold to the power grid and charges and discharges the battery when certain requirements are met. The power storage system 1 includes a current converter 11 and a battery 12 . The current converter 11 converts the power of the power system 5. For example, the current converter 11 is a power conditioner that converts DC power or AC power of the power system 5 into DC power and supplies it to the battery 12. The current converter 11 converts the DC power received from the battery 12 into DC power or AC power that can be handled by the power grid 5 , and supplies it to the power grid 5 . In addition, the current converter 11 may convert the power input from the power system 5 to the battery 12 . The battery 12 is a storage battery capable of charging and discharging power. For example, the battery 12 is a lithium ion battery. The battery 12 may be a single cell or a battery pack. For example, when the capacity and voltage of a single cell of a lithium ion battery are small, the single cells may be connected in series or in parallel to form a battery group in accordance with the specifications of the power conversion unit. The power generation system 4 includes a power generation unit that generates power by using natural energy (e.g., solar, hydroelectric, or wind power), and a power conditioner that converts the output DC power or AC power into DC power or AC power that can be handled by the power grid 5. The power system 5 transfers power to and from the battery 12 via the current converter 11 . The command unit 6 transmits various signals to and from the charge / discharge control device 2. The command unit 6 transmits requested input / output to the power grid 5, requested time, and power selling price to the charge / discharge control device 2B.

[0015] (Configuration of charge / discharge control device) FIG. 2 is a block diagram showing a functional configuration of the charge / discharge control device according to the first embodiment. As shown in FIG. 2, the charge / discharge control device 2B includes a processor 21B, a memory 22, a storage 23, a communication interface 24, a display device 25, and an input device .

[0016] The processor 21B operates in accordance with a predetermined program to perform the functions of a charge / discharge control unit 211, a request acquisition unit 212, a predicted full charge capacity calculation unit 213, a full charge capacity determination unit 214, a predicted income calculation unit 2151, an income determination unit 2152, an output measurement unit 218, and a memory unit 219.

[0017] The charge / discharge control unit 211 controls the charging and discharging of the battery within the standard usage range. When a predetermined requirement is satisfied, the charge / discharge control unit 211 refers to the additional use range and controls the charge / discharge of the battery. Here, the "standard range of use" and the "additional range of use" will be described in detail with reference to FIG.

[0018] (Standard scope of use and additional scope of use) 3, the standard usage range is a range set so that the battery 12 meets a target battery life. For example, in the present disclosure, the standard usage range is a range set so that the battery 12 meets a ten-year battery life. In this embodiment, the standard use range is mainly set for the charge and discharge current of the battery 12. For example, in the standard range of use where the charge / discharge current is in the range OX, the battery life determined by charging and discharging the battery 12 for a certain period of time at a constant charge / discharge current value X is X. y The larger the charge / discharge current, the shorter the battery life, as shown by the curve, when charging and discharging at a constant charge / discharge current. yis the battery life that takes the smallest value within the standard usage range and meets the target battery life (ten years). The battery life α determined from the value of the charge and discharge current α (α < X) y In this case, as the value of the charge and discharge current approaches 0 from α, the battery life will increase. The additional usage range where the charge and discharge current is in the range of X - Z exceeds the standard usage range. When the charge and discharge current is made larger than the standard usage range, the battery life Y y、 Z y will fall below the target battery life as shown. However, the battery life is determined when charging and discharging are performed for a certain period at a constant charge and discharge current, and it is considered that the battery life is unlikely to change significantly following the curve when charging and discharging are temporarily performed in the additional usage range. The additional usage range is created by the operator based on experiments, empirical formulas, etc. and stored in the storage unit 219. The non - usable range is considered to be inconvenient for the battery life of the battery 12. In this embodiment, mainly, the standard usage range is set for the charge and discharge current of the battery 12. The additional usage range is a set range that exceeds the standard usage range. The additional usage range is predicted by the operator based on experiments, empirical formulas, etc. and stored in the storage unit 219. When the charge - discharge control unit 211 meets a predetermined requirement, it refers to the additional usage range stored in the storage unit 219 and performs charge - discharge control of the battery.

[0019] The request acquisition unit 212 acquires the request input / output to the power system 5, the request time, and the selling electricity price. The request acquisition unit 212 receives various signals from / to the command post 6 via the communication interface 24. For example, in the required input / output, the required output is an output value required for the power supplied to the power system 5, and the required input is a negawatt due to charging input from the power system 5 to the battery 12 via the power conversion unit 11. For example, charging can be prioritized over discharging, in anticipation of the fact that the power fee obtained by multiplying the amount of power obtained by inputting (charging) the required input for each operation time within the range of the required time by the predicted future power selling price will exceed the target income line described later in the future. The charge / discharge control device 2B of the present disclosure can appropriately select whether to discharge at that time to earn income, or to charge and prepare for a large amount of discharge in the future. For example, the required time is the time required to supply power to the power grid 5. For example, the electricity selling price is the price per kWh when selling electricity to an electric power company. The energy charge is calculated by multiplying the requested input / output, the requested time, and the electricity selling price. The requested input / output, requested time, and electricity selling price acquired by the request acquisition unit 212 are stored in the storage unit 219 . In this disclosure, the term "demand time" means "the time required to supply power to the power grid 5" or "the number of cycles required to supply power to the power grid 5." For example, the number of cycles is applied to the operating distance of a vehicle or ship, or to equipment that operates per operating cycle, and is used for a battery 12 that has a demand for high-speed operation within a certain period of time.

[0020] The estimated full charge capacity calculation unit 213 calculates the current estimated full charge capacity. The current predicted full charge capacity is the full charge capacity of the battery 12 that is predicted to change over a required time period when the battery 12 is charged and discharged beyond the standard usage range in order to satisfy the required input / output and time period. In this disclosure, the full charge capacity varies depending on the SOH (State Of Health). The full charge capacity is the capacity ratio of the battery 12 before and after deterioration due to aging or various circumstances, and refers to the full charge capacity of the battery 12 after deterioration when the full charge capacity before deterioration is set to 100%. If the full charge capacity of the initial state of the battery 12 used is set to the initial full charge capacity, the full charge capacity can be calculated by the following formula (1). Full charge capacity [Ah] = initial full charge capacity [Ah] × (SOH [%] / 100)…(1) Moreover, the state of charge (hereinafter referred to as SOC), which will be described later, is an index representing the state of charge of the battery 12. A fully charged state is expressed as 100[%], and a completely discharged state is expressed as 0[%]. If the fully charged capacity after charging and discharging the battery 12 is the remaining capacity, the SOC can be calculated by the following formula (2). SOC [%] = remaining capacity [Ah] / full charge capacity [Ah] × 100%…(2)

[0021] The full charge capacity determination unit 214 determines whether or not the current estimated full charge capacity exceeds the target full charge capacity line. Here, the "target full charge capacity line" will be described in detail with reference to FIG. The target full charge capacity line is information that defines a target full charge capacity for each operation time. The target full charge capacity line is set so as to satisfy a target income line, which will be described later, within a required time period. The target full charge capacity line is stored in the storage unit 219 and is read out when the full charge capacity determination unit 214 makes a determination. As shown in Fig. 4, the worker creates a target full charge capacity line that defines a guideline for the full charge capacity of the battery 12 so as to satisfy the target income line in advance. The full charge capacity determination unit 214 determines whether the current predicted full charge capacity, which is expected to change by performing charging and discharging within a required time (t1-t2), exceeds the target full charge capacity line. Note that, in the determination of the current predicted full charge capacity in the present disclosure, the current predicted full charge capacity is determined to be exceeded if it exceeds the target full charge capacity line even partially. For example, let us assume that the current predicted full charge capacity, which changes within the range of the required time (t1-t2), is represented by L1. If the full charge capacity at time t1 is PU and the full charge capacity at time t2 is PL1, then both PU and PL1 are above the target full charge capacity line. Therefore, the current predicted full charge capacity represented by L1 is in a state of exceeding the target full charge capacity line. On the other hand, suppose that the current predicted full charge capacity that changes within the range of the required time (t1-t2) is represented by L1. If the full charge capacity at time t1 is PU and the full charge capacity at time t2 is PL2, then PU exceeds the target full charge capacity line, but PL2 is below it. Therefore, the current predicted full charge capacity represented by L2 is in a state where it partially exceeds the target full charge capacity line. In this case, when the charge / discharge control device 2B refers to the additional use range, performs discharge control, and performs an operation to obtain income, the actual full charge capacity after t1 follows L2 and falls below the target full charge capacity line. However, if it is determined that the current predicted income, which will be described later, exceeds the target income line, it is acceptable for the actual full charge capacity after t1 to fall below the target full charge capacity line. The determination by the full charge capacity determination unit 214 differs depending on the request input / output acquired by the request acquisition unit 212 . For example, when the required output is acquired, the full charge capacity determination unit 214 determines whether the current predicted full charge capacity exceeds the target full charge capacity line even in part. After that, when the current predicted full charge capacity exceeds the target full charge capacity line even in part, the charge / discharge control device 2B refers to the additional use range, performs discharge control, and performs an operation to obtain income. When the current predicted full charge capacity falls below the target full charge capacity line, the charge / discharge control device 2B performs charging / discharging within the standard use range. On the other hand, when a request input is acquired, the full charge capacity determination unit 214 determines whether the current predicted full charge capacity exceeds the target full charge capacity line even in part. After that, when the current predicted full charge capacity exceeds the target full charge capacity line even in part, the charge / discharge control device 2B refers to the additional use range and performs charge control and charging. When the current predicted full charge capacity falls below the target full charge capacity line, the charge / discharge control device 2B performs charging / discharging within the standard use range. Furthermore, when using the request input, the charge / discharge control unit 211 can prioritize charging over discharging, on the assumption that the above-mentioned power fee will exceed the target revenue line in the future.

[0022] The predicted income calculation unit 2151 calculates the current predicted income. The current forecast income is the income that is predicted to be obtained based on the required input / output, the required time, and the electricity selling price when the battery 12 is charged / discharged beyond the standard usage range to satisfy the required input / output and the required time. The income predicted to be obtained based on the required input, the required time, and the electricity selling price is the income expected in the future with a certain margin from the time of prediction.

[0023] The income determination unit 2152 determines whether the current predicted income exceeds the target income line. Here, the "target revenue line" will be explained in detail with reference to FIG. The target income line is information that defines the target income for each operating time period. The target income line is stored in the memory unit 219 and is read out when the income determination unit 2152 makes a determination. The target revenue line is set appropriately. For example, the target revenue line may be information obtained by taking statistics on the life spans of a wide variety of batteries and determining a target revenue that is highly feasible and allows for early recovery of investment within the operating time. The operator creates a target income line in advance as shown in Fig. 5. The income determination unit 2152 determines whether the current predicted income (energy fee) obtained by multiplying the amount of power obtained by outputting the requested output for each operation time within the requested time (t1-t2) by the power selling price exceeds the target income line. In addition, when the requested input is used, it determines whether the energy fee obtained by multiplying the amount of power obtained by inputting (charging) the requested input for each operation time within the requested time by the power selling price predicted in the future exceeds the target income line. The income determination unit 2152 further determines whether the electricity selling price satisfies a target price. The target electricity selling price is stored in the storage unit 219 and is read out at the time of judgment by the income judgment unit 2152.

[0024] The output measurement section 218 includes a measurement sensor 218m. As shown in FIG. 1, the measurement sensor 218m is disposed between the current conversion unit 11 and the battery 12. The measurement sensor 218m measures the voltage value applied to the battery 12 and the current value flowing between the battery 12 and the current converter 11. The output measuring unit 218 calculates the power and amount of power of the battery 12 from the measured current and voltage values. For example, the voltage value and the current value measured by the measurement sensor 218m are stored in the storage unit 219. For example, the power and the amount of power calculated by the output measuring unit 218 are stored in the storage unit 219.

[0025] The storage unit 219 stores the acquired requested input / output, requested time, and electricity selling price. The storage unit 219 stores the additional use range that exceeds the standard use range. The memory unit 219 stores a target revenue line and a target full charge capacity line. The storage unit 219 stores the target electricity selling price.

[0026] The predetermined program executed by the processor 21B is stored in a computer-readable recording medium. The computer-readable recording medium refers to a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, and the like. The computer program may be distributed to a computer via a communication line, and the computer that receives the program may execute the program. The program may be for implementing part of the above-mentioned functions. The program may be a so-called differential file (differential program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

[0027] The memory 22 has a memory area necessary for the operation of the processor 21B.

[0028] The storage 23 is a so-called auxiliary storage device, such as a hard disk drive (HDD) or a solid state drive (SSD).

[0029] The communication interface 24 is an interface for receiving various signals from an external device (command unit 6).

[0030] The display device 25 is a display device, such as a liquid crystal display or an organic EL display. For example, the display device 25 may display information such as requested input / output, requested time, or electricity selling price obtained from the command unit 6, or the determination of the full charge capacity determination unit 214 or the determination of the income determination unit 2152, or the like.

[0031] The input device 26 is an input device that accepts operations by a user of the charge / discharge control device 2B (or the charge / discharge control device 2C, the charge / discharge control device 2D, and the charge / discharge control device 2A described later), and is, for example, a general mouse, keyboard, touch sensor, etc.

[0032] (Charge / discharge control method) A charge / discharge control method in this embodiment will be described. The charge / discharge control method in this embodiment is carried out according to the flow shown in FIG.

[0033] (Overview of processing related to the charge / discharge control unit) In the first embodiment of the present disclosure, after performing a specified processing, if the current predicted income exceeds the target income line (ST15: YES) and further, the current predicted full charge capacity exceeds the target full charge capacity line (ST16: YES), the charge / discharge control unit 211 performs charge / discharge control of the battery 12 beyond the standard usage range (ST17). Each step is explained below.

[0034] First, the charge / discharge control section 211 of the charge / discharge control device 2B controls charging and discharging of the battery within the standard usage range (ST11). The standard usage range is a range that is set so that the battery 12 meets a target battery life. In this embodiment, the standard use range is mainly set for the charge and discharge current of the battery 12. When a predetermined condition is subsequently satisfied, the charge / discharge control unit 211 refers to the additional use range stored in the storage unit 219 and controls the charge / discharge of the battery.

[0035] Next, the request acquisition unit 212 of the charge / discharge control device 2B acquires the requested input / output to the power grid 5, the requested time, and the power selling price (ST12). The request acquisition unit 212 receives various signals from the command unit 6 via the communication interface 24 . The requested input / output, requested time, and electricity selling price acquired by the request acquisition unit 212 are stored in the storage unit 219 .

[0036] Next, the predicted income calculation unit 2151 of the charge / discharge control device 2B calculates the current predicted income (ST13). The current forecast income is the income expected to be obtained based on the requested input / output, the requested time, and the electricity selling price.

[0037] Next, the predicted full charge capacity calculation unit 213 of the charge / discharge control device 2B calculates the current predicted full charge capacity (ST14). The current predicted full charge capacity is the full charge capacity of the battery 12 that is predicted to change over a required time period when the battery 12 is charged and discharged beyond the standard usage range in order to satisfy the required input / output and time period.

[0038] Next, the income determination unit 2152 of the charge / discharge control device 2B determines whether or not the calculated current predicted income exceeds the target income line (ST15). The target income line is information that defines the target income for each operating time period. The target revenue line is set appropriately. For example, the target revenue line may be information obtained by taking statistics on the life spans of a wide variety of batteries and determining a target revenue that is highly feasible and allows for early recovery of investment within the operating time. The target income line is stored in the memory unit 219 and is read out when the income determination unit 2152 makes a determination. When the income determination unit 2152 determines that the current forecast income exceeds the target income line (ST15: YES), the process proceeds to ST16. When the income determination unit 2152 determines that the current estimated income does not exceed the target income line (ST15: NO), the process returns to ST11.

[0039] Next, the full charge capacity determination unit 214 of the charge / discharge control device 2B determines whether the calculated current predicted full charge capacity exceeds the target full charge capacity line (ST16). As described above, in the determination of the current predicted full charge capacity in the present disclosure, the current predicted full charge capacity is determined to be exceeded if it exceeds the target full charge capacity line even partially. The target full charge capacity line is information that defines a target full charge capacity for each operation time. The target full charge capacity line is set so as to satisfy a target income line, which will be described later, within a required time period. The target full charge capacity line is stored in the storage unit 219 and is read out when the full charge capacity determination unit 214 makes a determination. When the full charge capacity determination unit 214 determines that the current estimated full charge capacity exceeds the target full charge capacity line (ST16: YES), the process proceeds to ST17. When the full charge capacity determination unit 214 determines that the current estimated full charge capacity does not exceed the target full charge capacity line (ST16: NO), the process returns to ST11. As described above, the determination by the full charge capacity determination unit 214 differs depending on the request input / output acquired by the request acquisition unit 212.

[0040] Next, when the current predicted income exceeds the target income line (ST15: YES) and the current predicted full charge capacity exceeds the target full charge capacity line (ST16: YES), the charge / discharge control unit 211 of the charge / discharge control device 2B performs charge / discharge control of the battery 12 within an additional usage range that exceeds the standard usage range (ST17). In addition, when using a required input instead of a required output, the charge / discharge control unit 211 can prioritize charging over discharging, assuming that the aforementioned electricity fee will exceed the target revenue line in the future. Here, charging and discharging control of the battery 12 is performed within the additional use range stored in the memory unit 219. (Complete)

[0041] (Action and Effects) According to the charge / discharge control device 2B of this embodiment, when a predetermined condition is satisfied, the charge / discharge control of the battery 12 can be performed by referring to the additional use range stored in the storage unit 219. Therefore, the charge / discharge control device 2B of this embodiment can meet the required input / output.

[0042] Second Embodiment Hereinafter, a charge / discharge control device and a charge / discharge control method according to the present disclosure will be described as a second embodiment with reference to FIGS. Components common to the first embodiment are given the same reference numerals and detailed description thereof will be omitted.

[0043] (Output system configuration) As shown in FIG. 7, the output system 10C includes a power storage system 1, a charge / discharge control device 2C, a power generation system 4, a power grid 5, and a command unit 6. The output system 10C includes a charge / discharge control device 2C that adds some functions to the charge / discharge control device 2B.

[0044] (Charge / Discharge Control System Configuration) As shown in FIG. 8, the charge / discharge control device 2C includes a processor 21C, a memory 22, a storage 23, a communication interface 24, a display device 25, and an input device .

[0045] For example, in the second embodiment of the present disclosure, the processor 21C may function as a temperature control unit 2161 and an SOC value calculation / determination unit 2162, in addition to the functions of the processor 21B, by operating according to a predetermined program. For example, in the second embodiment of the present disclosure, the processing according to this embodiment may be performed independently of the processing performed in the first embodiment described above.

[0046] The temperature control unit 2161 controls the temperature of the battery 12 so that it falls within a predetermined temperature range. For example, the predetermined temperature range is a temperature range that is set to meet a target battery life. As shown in FIGS. 7 and 8, the temperature control section 2161 includes a temperature measuring section 2161m and a temperature adjusting section 2161tc. The temperature measuring unit 2161m measures the temperature of the battery 12C. The temperature adjustment unit 2161tc is a fan, a ribbon heater, or an air conditioner. When a predetermined requirement is satisfied, the temperature control section 2161 controls the operation of the temperature adjustment section 2161tc, whereby the temperature control section 2161 can control the temperature of the battery 12 beyond a predetermined temperature range.

[0047] The SOC value calculation / determination unit 2162 acquires, from the storage unit 219, the voltage value of the battery 12 controlled within the operation range. Moreover, the SOC value calculation / determination unit 2162 calculates the SOC value using information such as the voltage, current, temperature, full charge capacity, and the relationship between the voltage and the state of charge (SOC) of the battery 12C, and determines whether the voltage value exceeds the operating range based on the SOC value. In the present disclosure, since the voltage fluctuates instantaneously, the voltage value is determined based on the SOC value, which changes less abruptly than the voltage. In addition, the storage unit 219 stores information such as the fully charged capacity of the battery 12C, and the relationship between the voltage and the SOC.

[0048] (Operation scope) Here, the "operation range" will be described in detail with reference to Figs. The charging and discharging of a battery can be explained using either current or power. Here, we will explain charging and discharging of current so that it is easier to explain using diagrams that use SOC (battery charge rate). Also, there are DC and AC resistance values, but here we will only explain the DC portion to simplify the explanation. When charge / discharge control is performed on a battery in a battery open-circuit voltage state, the voltage value of the battery 12 changes from the battery open-circuit voltage. As shown in Fig. 9, the voltage rises (drops) by the product of the current value i during charging (discharging) and the internal resistance value R of the battery 12, and charging (discharging) ends when the battery reaches the upper limit voltage (lower limit voltage). In Fig. 9, the operating temperature of the battery 12 is constant. The SOC of the battery 12 is determined by point A when the battery reaches the upper limit voltage and point B when the battery reaches the lower limit voltage. In FIG. 10, it is considered that charging and discharging are performed at a current value within an additional use range, which is a set range beyond the standard use range, in order to satisfy the required input and output. In FIG. 10, the operating temperature of the battery 12 is also constant. Compared to FIG. 9, when charging and discharging are performed at a large current value i', the voltage further rises (drops) by the product of the current value i' and the internal resistance value R of the battery 12. As a result, the voltage changes from the arrival point A when the battery upper limit voltage is reached and the arrival point B when the battery lower limit voltage is reached in FIG. 9 to the arrival point C and the arrival point D. The operating range of the SOC determined by the arrival point C and the arrival point D is narrower than the operating range in FIG. 9. In the charging and discharging in FIG. 10, it is difficult to satisfy the required input and output and the required time. In Fig. 11, it is assumed that the operating temperature of the battery 12 is increased from that in Fig. 10. By increasing the operating temperature of the battery 12, the internal resistance value R' of the battery 12 can be made sufficiently smaller than that in Fig. 10. This makes it possible to reduce the integrated value of the current value i' and the internal resistance value R' of the battery 12 even when charging and discharging at a large current value i'. As a result, the operating range of the SOC determined by the point E when the battery upper limit voltage is reached and the point F when the battery lower limit voltage is reached can be made wider than that in Fig. 9. It is also possible to control the charging and discharging of the battery within the standard usage range while satisfying the required input and output. However, when satisfying the required input and output and the required time from the command unit 6, it is possible to perform charging and discharging within the additional usage range. Therefore, it is preferable that the SOC operating range is wide in order to satisfy the required amount of power. For example, the operator may set a threshold value for the SOC value in advance. The set SOC value is within the range of the upper and lower battery voltage limits that can be confirmed from the operating range. From this threshold value, the SOC value calculation and determination unit 2162 may determine whether or not the voltage value is likely to exceed the operating range based on the SOC value.

[0049] (Overview of processing related to the temperature control unit) In this embodiment, the following process is carried out independently of the process carried out in the first embodiment. After performing a specified process, if the battery 12 satisfies the required input / output and, as a result, the voltage value measured by the measurement sensor 218m based on the SOC value is likely to exceed the operating range (ST25: YES), the temperature control unit 2161 controls the temperature of the battery 12 beyond a specified temperature range via the temperature adjustment unit 2161tc (ST27a). Each step is explained below.

[0050] (Charge / discharge control method) First, the temperature control section 2161 of the charge / discharge control device 2C controls the temperature of the battery 12C so that it falls within a predetermined temperature range (ST21). For example, the predetermined temperature range is a temperature range that is set to meet a target battery life.

[0051] Next, the SOC value calculation / determination unit 2162 of the charge / discharge control device 2C obtains the voltage value of the battery 12 controlled within the operation range from the memory unit 219, and further calculates the SOC value using information such as the voltage, current, and temperature of the battery 12, the full charge capacity of the battery 12C stored in the memory unit 219, and the relationship between the voltage and SOC (ST22). Alternatively, the SOC value calculation / determination unit 2162 may calculate the SOC value from the above-mentioned formula (2).

[0052] Next, the SOC value calculation / determination unit 2162 of the charge / discharge control device 2C determines whether or not the SOC value is outside the upper / lower threshold range and the acquired voltage value is likely to exceed the operating range based on the SOC value (ST25). For example, the operator may set a threshold value for the SOC value in advance. The set SOC value is within the range of the upper and lower battery voltage limits that can be confirmed from the operating range. From this threshold value, the SOC value calculation and determination unit 2162 determines whether or not there is a possibility that the voltage value will exceed the operating range based on the SOC value. When the SOC value determining unit 2162 determines, based on the SOC value, that there is a possibility that the voltage value will exceed the operating range (ST25: YES), the process proceeds to ST27a. When the SOC value determination unit 2162 determines based on the SOC value that the voltage value does not exceed the operating range (ST25: NO), the process returns to ST21. In addition, in order to prevent chattering when switching near a threshold value that is determined to exceed the operating range, a hysteresis may be provided to the threshold value. A table may be created in which the temperature setting value is gradually increased when the SOC value increases or decreases beyond the threshold value. In this embodiment, the calculation of the SOC value and the judgment of the measured voltage value are performed consistently by the SOC value calculation / judgment unit 2162. However, depending on the operation, a voltage value judgment unit may be provided to separate these processes.

[0053] Next, the temperature control section 2161 of the charge / discharge control device 2C controls the temperature of the battery 12 beyond a predetermined temperature range (ST27a). The temperature control section 2161 controls the operation of the temperature adjustment section 2161tc, and thus the temperature control section 2161 can control the temperature of the battery 12 beyond a predetermined temperature range.

[0054] (Action and Effects) According to the charge / discharge control device 2C of this embodiment, when a predetermined requirement is satisfied, the charge / discharge control of the battery 12 can be performed by referring to the additional use range stored in the storage unit 219. Therefore, the charge / discharge control device 2C of this embodiment can meet the required input / output.

[0055] Furthermore, according to the charge / discharge control device 2C of this embodiment, when the SOC value satisfies a predetermined requirement, the temperature of the battery 12C can be controlled beyond a predetermined temperature range. By increasing the operating temperature of the battery 12C, the internal resistance value of the battery 12C can be reduced. As a result, even if charging and discharging are performed at a current value within the additional use range, the integrated value of the current value and the internal resistance value can be reduced, and the operating range of the SOC can be widened. Therefore, in the charging and discharging in this embodiment, the required input / output and the required time can be easily satisfied. Therefore, the charge / discharge control device 2C of this embodiment can meet the required input / output.

[0056] <Third embodiment> Hereinafter, a charge / discharge control device and a charge / discharge control method according to the present disclosure will be described as a third embodiment with reference to Figs. Components common to the second embodiment are given the same reference numerals and detailed description thereof will be omitted.

[0057] (Output system configuration) As shown in FIG. 13, an output system 10D includes a power storage system 1D, a charge / discharge control device 2D, a power generation system 4, a power grid 5, and a command unit 6. The output system 10D includes a charge / discharge control device 2D that adds some functions to the charge / discharge control device 2C. The power storage system 1D includes a current converter 11 and a battery 12D. Battery 12D is a battery whose internal resistance, due to aging or various other reasons, is greater than the internal resistance of a battery that has not aged significantly.

[0058] (Charge / Discharge Control System Configuration) As shown in FIG. 14, the charge / discharge control device 2D includes a processor 21D, a memory 22, a storage 23, a communication interface 24, a display device 25, and an input device .

[0059] For example, in the third embodiment of the present disclosure, the processor 21D may operate in accordance with a predetermined program to perform the functions of a temperature control unit 2161D, a resistance value acquisition unit 2171, a target resistance value setting unit 2172, and a memory unit 219D in addition to the functions of the processor 21C. For example, in the third embodiment of the present disclosure, the processing according to this embodiment may be performed independently of the processing performed in the second embodiment described above.

[0060] When a predetermined requirement is satisfied, the temperature control unit 2161D performs temperature control of the battery 12D beyond a predetermined temperature range so as to bring the internal resistance value closer to a target resistance value. For example, the operator may set the temperature of the battery 12D when it has the target resistance value in the temperature control unit 2161D. The temperature control unit 2161D controls the temperature of the battery 12D beyond a predetermined temperature range so as to approach the temperature of the battery 12D when it has the target resistance value.

[0061] The resistance value acquisition unit 2171 acquires the internal resistance value of the battery 12D. For example, the internal resistance value is periodically acquired by periodically measuring the internal resistance value of the battery 12D and stored in the storage unit 219D. In this case, the resistance value acquisition unit 2171 acquires the internal resistance value of the battery 12D from the storage unit 219D.

[0062] The target resistance value setting unit 2172 sets the target resistance value. The target resistance value is the internal resistance value targeted for the battery 12D.

[0063] The memory unit 219D stores the internal resistance value of the battery 12 in addition to the information stored in the memory unit 219.

[0064] (Operation range changes over time or due to various circumstances) Here, the "operation range that changes with time or due to various circumstances" will be described in detail with reference to FIG. 9 and FIG. 15 to FIG. The internal resistance value of the battery 12D changes from the internal resistance value R at the time of FIG. 9 to the internal resistance value R due to aging or various other reasons. d In FIG. 15, the operating temperature of the battery 12 is constant. Compared to FIG. 9, the internal resistance R d When charging and discharging, the current value i and the internal resistance value R of the battery 12 are d The voltage further rises (drops) by the integrated amount of the voltage Vcc and the voltage Vdc. As a result, the voltage changes from point A when the battery upper limit voltage is reached and point B when the battery lower limit voltage is reached in FIG. 9 to point G and point H. The SOC operating range determined by points G and H becomes narrower than the operating range in FIG. 9. In the charge / discharge in FIG. 15, it is difficult to satisfy the required input / output and the required time. In Fig. 16, it is assumed that the operating temperature of the battery 12 is increased from that in Fig. 15. By increasing the operating temperature of the battery 12, the internal resistance value R d The internal resistance R is sufficiently small compared to the case in Figure 15. r This allows the increased internal resistance R d Even if the battery is charged and discharged at 1000V, the temperature of the battery 12 will increase, and the current value i and the internal resistance value R of the battery 12 will r As a result, the SOC operating range determined by the point J when the battery upper limit voltage is reached and the point K when the battery lower limit voltage is reached can be made wider than that in FIG.

[0065] (Overview of processing related to the temperature control unit) In this embodiment, the following process is carried out independently of the process carried out in the first embodiment. The process according to this embodiment adds ST23, ST24, and ST27b to the process performed in the second embodiment. After performing the specified processing, if the battery 12D satisfies the required input / output and, based on the SOC value, there is a possibility that the voltage value measured by the measurement sensor 218m will exceed the operating range (ST25: YES), the temperature control unit 2161D controls the temperature of the battery 12D beyond a specified temperature range via the temperature adjustment unit 2161tc so as to bring the internal resistance value closer to the target resistance value (ST27b). Each step is explained below.

[0066] First, in ST21-ST22, the same processes as those in the second embodiment are performed.

[0067] Next, the resistance value acquisition unit 2171 of the charge / discharge control device 2D acquires the internal resistance value of the battery 12D (ST23).

[0068] Next, the target resistance value setting unit 2172 of the charge / discharge control device 2D sets the target resistance value. (ST24). The target resistance value is the internal resistance value targeted for the battery 12D.

[0069] Next, the SOC value calculation / determination unit 2162 of the charge / discharge control device 2D determines, based on the SOC value, whether or not the SOC value is outside the upper / lower threshold range and the acquired voltage value is likely to exceed the operating range (ST25). When the SOC value calculation and determination unit 2162 determines, based on the SOC value, that there is a possibility that the voltage value will exceed the operating range (ST25: YES), the process proceeds to ST27b. When the SOC value calculation and determination unit 2162 determines based on the SOC value that the voltage value does not exceed the operating range (ST25: NO), the process returns to ST21.

[0070] Next, the temperature control section 2161D of the charge / discharge control device 2D controls the temperature of the battery 12D beyond a predetermined temperature range so as to bring the internal resistance value closer to the target resistance value (ST27b). For example, the operator may set the temperature of the battery 12D when it has the target resistance value in the temperature control unit 2161D. The temperature control unit 2161D controls the temperature of the battery 12D beyond a predetermined temperature range so as to approach the temperature of the battery 12D when it has the target resistance value.

[0071] (Action and Effects) According to the charge / discharge control device 2D of this embodiment, when a predetermined condition is satisfied, the charge / discharge control of the battery 12D can be performed by referring to the additional use range stored in the storage unit 219D. Therefore, the charge / discharge control device 2D of this embodiment can meet the required input / output.

[0072] Furthermore, according to the charge / discharge control device 2D of this embodiment, when the SOC value satisfies a predetermined requirement, the temperature of the battery 12D can be controlled beyond a predetermined temperature range. By increasing the operating temperature of the battery 12D, the internal resistance of the battery 12D that has increased over time or due to various circumstances can be reduced. This allows the integrated value of the current value and the internal resistance value to be reduced even when charging and discharging at a current value within the additional use range, and the operating range of the SOC can be widened. Therefore, the charging and discharging in this embodiment makes it easier to satisfy the required input / output and the required time. Therefore, the charge / discharge control device 2D of this embodiment can meet the required input / output.

[0073] <Fourth embodiment> Hereinafter, a charge / discharge control device and a charge / discharge control method according to the present disclosure will be described as a fourth embodiment with reference to FIG. Components common to the third embodiment are given the same reference numerals and detailed description thereof will be omitted. In this embodiment, the battery does not necessarily have to be the battery 12D. For example, the battery 12 may be used.

[0074] (Overview of processing related to the temperature control unit) In this embodiment, the following process is carried out independently of the process carried out in the first embodiment. The process according to this embodiment adds ST26 to the process performed in the third embodiment. After performing the specified processing, if the battery 12D satisfies the required input / output, and the voltage value measured by the measurement sensor 218m based on the SOC value is likely to exceed the operating range (ST25: YES), and further the electricity selling price satisfies the target price (ST26: YES), the temperature control unit 2161D controls the temperature of the battery 12D beyond the specified temperature range via the temperature adjustment unit 2161tc so as to bring the internal resistance value closer to the target resistance value (ST27b). Each step is explained below.

[0075] First, in ST21-ST24, the same processes as those in the third embodiment are performed.

[0076] Next, the SOC value calculation / determination unit 2162 of the charge / discharge control device 2D determines, based on the SOC value, whether or not the SOC value is outside the upper / lower threshold range and the acquired voltage value is likely to exceed the operating range (ST25). When the SOC value calculation and determination unit 2162 determines, based on the SOC value, that there is a possibility that the voltage value will exceed the operating range (ST25: YES), the process proceeds to ST26. When the SOC value calculation and determination unit 2162 determines based on the SOC value that the voltage value does not exceed the operating range (ST25: NO), the process returns to ST21.

[0077] Next, the charge / discharge control device 2D determines whether the power selling price satisfies a target price (ST26). For example, the income determination unit 2152 determines whether or not the electricity selling price satisfies a target price, in addition to the process in ST15. When the income determination unit 2152 determines that the electricity selling price satisfies the target price (ST26: YES), the process proceeds to ST27b. When the income determination unit 2152 determines that the electricity selling price does not satisfy the target price (ST25: NO), the process returns to ST21.

[0078] Next, the temperature control section 2161D of the charge / discharge control device 2D controls the temperature of the battery 12D beyond a predetermined temperature range so as to bring the internal resistance value closer to the target resistance value (ST27b).

[0079] (Action and Effects) According to the charge / discharge control device 2D of this embodiment, when a predetermined condition is satisfied, the charge / discharge control of the battery 12D can be performed by referring to the additional use range stored in the storage unit 219D. Therefore, the charge / discharge control device 2D of this embodiment can meet the required input / output.

[0080] Furthermore, according to the charge / discharge control device 2D of this embodiment, when the SOC value and the power selling price satisfy predetermined requirements, the temperature of the battery 12D can be controlled beyond a predetermined temperature range. By increasing the operating temperature of the battery 12D, the internal resistance value of the battery 12 can be reduced, thereby widening the operating range of the SOC. Furthermore, the income determination unit 2152 can determine whether or not the power selling price satisfies a target price. This allows the temperature control unit 2161D to control the operating range of the SOC in response to the charge / discharge control of the battery 12D. Therefore, in the charging and discharging in this embodiment, the required input / output and the required time are easily satisfied. Therefore, the charge / discharge control device 2C of this embodiment can meet the required input / output.

[0081] <Fifth embodiment> Hereinafter, a charge / discharge control device and a charge / discharge control method according to the present disclosure will be described as a fifth embodiment with reference to Figs. Components common to the first embodiment are given the same reference numerals and detailed description thereof will be omitted.

[0082] (Output system configuration) As shown in FIG. 19, an output system 10A includes a power storage system 1A, a charge / discharge control device 2A, a power generation system 4A, a power grid 5, and a command unit 6. The output system 10A is a system that takes into consideration the full charge capacity of the battery 12 with respect to the power system, and charges and discharges the battery when certain requirements are met. The power storage system 1A includes a current converter 11A and a battery 12. For example, the current converter 11A is a voltage regulator. For example, the power generation system 4A is an alternator.

[0083] The request acquisition unit 212A acquires, from the command unit 6, the requested input / output to the power system 5 and the requested time. The requested input / output and requested time acquired by the request acquisition unit 212A are stored in the storage unit 219A. In this embodiment, the target full charge capacity line is set according to the required time. For example, an operator calculates the number of cycles required to supply power to the power grid 5 from the operating distance and operating cycle of the vehicle or ship, and sets a target full charge capacity line according to this number of cycles.

[0084] (Processing related to the charge / discharge control unit) In the fifth embodiment of the present disclosure, when the current estimated full charge capacity exceeds the target full charge capacity line (ST16: YES), the charge / discharge control unit 211 performs charge / discharge control of the battery 12 beyond the standard usage range (ST17). Each step is explained below.

[0085] First, the charge / discharge control section 211 of the charge / discharge control device 2A controls charging and discharging of the battery within the standard use range (ST11).

[0086] Next, the request acquisition unit 212 of the charge / discharge control device 2A acquires the requested input / output to the power system 5 and the requested time (ST12).

[0087] Next, the predicted full charge capacity calculation unit 213 of the charge / discharge control device 2A calculates the current predicted full charge capacity (ST14).

[0088] Next, the full charge capacity determination unit 214A of the charge / discharge control device 2A determines whether the calculated current predicted full charge capacity exceeds the target full charge capacity line (ST16). Similarly, in the present embodiment, the current predicted full charge capacity is determined to be exceeded if it exceeds the target full charge capacity line even partially. In this embodiment, the target full charge capacity line is set according to the required time. The target full charge capacity line is stored in the storage unit 219A, and is read out at the time of judgment by the full charge capacity judgment unit 214A. When the full charge capacity determination unit 214A determines that the current estimated full charge capacity exceeds the target full charge capacity line (ST16: YES), the process proceeds to ST17. When the full charge capacity determination unit 214A determines that the current estimated full charge capacity does not exceed the target full charge capacity line (ST16: NO), the process returns to ST11.

[0089] Next, when the current estimated full charge capacity exceeds the target full charge capacity line (ST16: YES), the charge / discharge control unit 211 of the charge / discharge control device 2B performs charge / discharge control of the battery 12 within an additional usage range that exceeds the standard usage range (ST17). In this embodiment, the charge / discharge control unit 211 may refer to the additional use range in response to a request input from the power grid 5, perform charge control, and charge the energy generated by the power generation system 4A into the battery 12. Thereafter, in response to a request input / output from the power grid 5, the charge / discharge control unit 211 may refer to the additional use range, perform discharge control, and discharge the battery 12. Here, charging and discharging control of the battery 12 is performed within the additional use range stored in the memory unit 219A. (Complete)

[0090] (Action and Effects) According to the charge / discharge control device 2A of this embodiment, when a predetermined condition is satisfied, the additional use range stored in the storage unit 219A can be referenced to control the charge / discharge of the battery. Therefore, the charge / discharge control device 2A of this embodiment can meet the required input / output.

[0091] (Other embodiments) Although the embodiments of the present disclosure have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like that do not depart from the gist of the present disclosure are also included. The order of the steps of the present disclosure may be changed as appropriate. For example, the order of the steps of the charge / discharge control method (steps S11 to S14) may be changed. For example, the order of the steps of the charge / discharge control method (steps S22 to S24) may be changed.

[0092] For example, in the present disclosure, the acquired requested input / output, requested time, and electricity selling price are stored in the storage unit 219, but instead of the storage unit 219, they may be stored in a non-volatile memory.

[0093] For example, in the present disclosure, the acquired requested input / output, requested time, and electricity selling price are stored in the storage unit 219, but instead of the storage unit 219, they may be stored in a storage device.

[0094] For example, in the present embodiment, the internal resistance value is obtained periodically by measuring the internal resistance value of the battery 12D periodically, but the internal resistance value may be obtained in real time.

[0095] For example, in the present disclosure, the battery 12 (battery 12D) may have multiple cells. In this case, the process of the present disclosure is performed on a target cell from among the multiple cells.

[0096] In the present disclosure, the remaining battery capacity [Ah], which has a correlation with the SOC, may be used instead of the SOC [%].

[0097] In the present disclosure, the standard usage range is a range set so that the battery 12 meets a ten-year battery life, and is set for the charge and discharge current. For example, as a modified example, standard operating ranges may be set for the operating temperature, upper limit voltage, and lower limit voltage of the battery 12 as shown in Figs. 22 to 24 . Furthermore, charge and discharge control may be performed using a charge and discharge current, a usage temperature, an upper limit voltage, or a lower limit voltage to which a standard usage range is applied. For example, an additional use range may be set in a similar manner and used for charge / discharge control.

[0098] Although the embodiment of the present disclosure has been described above, this embodiment is shown as an example and is not intended to limit the scope of the disclosure. This embodiment can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the present disclosure. This embodiment and its modifications are included in the scope and gist of the present disclosure, as well as in the scope of the present disclosure and its equivalents.

[0099] <Additional Notes> The charge / discharge control device described in each embodiment can be understood, for example, as follows.

[0100] (1) A charge / discharge control device 2A according to a first aspect includes a charge / discharge control unit 211 that controls charging and discharging of the battery within a standard usage range, a request acquisition unit 212A that acquires a required input / output to the power grid and a required time, a predicted full charge capacity calculation unit 213 that calculates a current predicted full charge capacity, which is the full charge capacity of the battery that is expected to change with the required time when the battery is charged or discharged beyond the standard usage range to satisfy the required input / output and the required time, and a full charge capacity determination unit 214A that determines whether the current predicted full charge capacity exceeds a target full charge capacity line, which is information that defines a target full charge capacity for each operation time. When the current predicted full charge capacity exceeds the target full charge capacity line, the charge / discharge control unit controls charging and discharging of the battery beyond the standard usage range.

[0101] According to the charge / discharge control device 2A of the first embodiment, when a predetermined requirement is satisfied, the charge / discharge control of the battery can be performed by referring to the additional use range stored in the storage unit 219A. Therefore, the charge / discharge control device 2A of this embodiment can meet the required input / output.

[0102] (2) The charge / discharge control device 2B of the second aspect is the charge / discharge control device 2A of (1), wherein the request acquisition unit 212B further acquires the electricity selling price, and further includes a predicted income calculation unit 2151 that calculates a current predicted income, which is the income expected to be obtained based on the required input / output, the required time, and the electricity selling price, when the battery is charged / discharged beyond the standard usage range to satisfy the required input / output and the required time, and an income determination unit 2152 that determines whether the current predicted income exceeds a target income line, which is information that sets a target income for each operating time, and the charge / discharge control unit 211 further performs charge / discharge control of the battery 12 beyond the standard usage range when the current predicted income exceeds the target income line.

[0103] According to the charge / discharge control device 2B of the second embodiment, when a predetermined requirement is satisfied, the additional use range stored in the storage unit 219 can be referenced to control the charge / discharge of the battery. Therefore, the charge / discharge control device 2B of this embodiment can meet the required input / output.

[0104] (3) A charge / discharge control device 2C according to a third aspect is the charge / discharge control device 2B of (2), further comprising a temperature control unit 2161 that controls the temperature of the battery 12C to be within a predetermined temperature range, and an SOC value calculation / determination unit 2162 that acquires a voltage value of the battery 12C controlled within the operating range and determines whether or not there is a possibility that the voltage value will exceed the operating range based on the SOC value. When the battery 12C satisfies the required input / output and there is a possibility that the voltage value will exceed the operating range, the temperature control unit 2161 controls the temperature of the battery 12C beyond the predetermined temperature range.

[0105] According to the charge / discharge control device 2C of the third aspect, when a predetermined requirement is satisfied, the additional use range stored in the storage unit 219 can be referenced to control the charge / discharge of the battery 12C. Therefore, the charge / discharge control device 2C of this embodiment can meet the required input / output.

[0106] Furthermore, according to the charge / discharge control device 2C of the third embodiment, when the SOC value satisfies a predetermined requirement, the temperature of the battery 12 can be controlled beyond a predetermined temperature range. By increasing the operating temperature of the battery 12, the internal resistance of the battery 12 can be reduced. This allows the integrated value of the current value and the internal resistance value to be reduced even when charging and discharging at a current value within the additional use range, and the operating range of the SOC can be widened. Therefore, the charging and discharging in this embodiment makes it easier to satisfy the required input / output and the required time. Therefore, the charge / discharge control device 2C of this embodiment can meet the required input / output.

[0107] (4) A charge / discharge control device 2D of a fourth aspect is the charge / discharge control device 2C of (3), and further includes a resistance value acquisition unit 2171 that acquires the internal resistance value of the battery, and a target resistance value setting unit 2172 that sets a target resistance value that is a target internal resistance value for the battery 12D, and when there is a possibility that the voltage value will exceed the operational range, the temperature control unit 2161D further controls the temperature of the battery so as to bring the internal resistance value of the battery 12D closer to the target resistance value.

[0108] According to the charge / discharge control device 2D of the fourth aspect, when a predetermined requirement is satisfied, the charge / discharge control of the battery 12D can be performed by referring to the additional use range stored in the storage unit 219D. Therefore, the charge / discharge control device 2D of this embodiment can meet the required input / output.

[0109] Furthermore, according to the charge / discharge control device 2D of the fourth aspect, when the SOC value satisfies a predetermined requirement, the temperature of the battery 12D can be controlled beyond a predetermined temperature range. By increasing the operating temperature of the battery 12D, the internal resistance of the battery 12D that has increased over time or due to various circumstances can be reduced. This allows the integrated value of the current value and the internal resistance value to be reduced even when charging and discharging at a current value within the additional use range, and the operating range of the SOC can be widened. Therefore, the charging and discharging in this embodiment makes it easier to satisfy the required input / output and the required time. Therefore, the charge / discharge control device 2D of this embodiment can meet the required input / output.

[0110] (5) A charge / discharge control device 2D according to a fifth aspect is the charge / discharge control device 2D of (4), in which the temperature control unit further controls the temperature of the battery when the power selling price satisfies a target price.

[0111] According to the charge / discharge control device 2D of the fifth aspect, when a predetermined requirement is satisfied, the charge / discharge control of the battery 12D can be performed by referring to the additional use range stored in the storage unit 219D. Therefore, the charge / discharge control device 2D of this embodiment can meet the required input / output.

[0112] Furthermore, according to the charge / discharge control device 2D of the fifth aspect, when the SOC value and the power selling price satisfy predetermined requirements, the temperature of the battery 12D can be controlled beyond a predetermined temperature range. By increasing the operating temperature of the battery 12D, the internal resistance value of the battery 12 can be reduced, thereby widening the operating range of the SOC. Furthermore, the income determination unit 2152 can determine whether or not the power selling price satisfies a target price. This allows the temperature control unit 2161D to control the operating range of the SOC in response to the charge / discharge control of the battery 12D. Therefore, in the charging and discharging in this embodiment, the required input / output and the required time are easily satisfied. Therefore, the charge / discharge control device 2C of this embodiment can meet the required input / output. [Explanation of symbols]

[0113] 1. Energy storage system 11 Current conversion section 12 batteries 2. Charge / discharge control device 211 Charge / discharge control unit 212 Request acquisition section 213 Predicted full charge capacity calculation unit 214 Full charge capacity determination unit 2151 Projected Revenue Calculation Department 2152 Income Determination Division 2161 Temperature control unit 2162 SOC value calculation and judgment unit 2171 Resistance value acquisition unit 2172 Target resistance value setting unit 218 Output measurement section 219 Memory section 4. Power generation system 5 Power system 6 Headquarters 10A Output System 1A Energy Storage System 11A Current conversion unit 2A charge / discharge control device 214A Full charge capacity determination unit 219A Storage section 4A Power Generation System 10C Output System 2C charge / discharge control device 10D Output System 1D Energy Storage System 12D battery 2D charge / discharge control device 2161D Temperature Control Unit 219D Storage section 10B output system 2B Charge / discharge control device

Claims

1. A charge / discharge control unit that controls charging and discharging of the battery within a standard operating range; a request acquisition unit that acquires a request input / output to the power system and a request time; a predicted full charge capacity calculation unit that calculates a current predicted full charge capacity, which is a full charge capacity of the battery that is predicted to change over the required time when the battery is charged or discharged beyond the standard use range in order to satisfy the required input / output and the required time; a full charge capacity determination unit that determines whether the currently predicted full charge capacity exceeds a target full charge capacity line, which is information that defines a target full charge capacity for each operation time; Equipped with The charge / discharge control unit is When the current predicted full charge capacity exceeds the target full charge capacity line, The battery is charged and discharged beyond the standard operating range. Charge and discharge control device.

2. The request acquisition unit further acquires a power selling price, a predicted income calculation unit that calculates a current predicted income, which is an income that is expected to be obtained based on the required input / output, the required time, and the electricity selling price, when the battery is charged / discharged beyond the standard use range in order to satisfy the required input / output and the required time; an income determination unit that determines whether the current forecast income exceeds a target income line, which is information that defines a target income for each operation time; Further equipped with The charge / discharge control unit further includes: If the current forecasted income exceeds the target income line, The charge / discharge control of the battery is performed beyond the standard use range. The charge / discharge control device according to claim 1 .

3. a temperature control unit that controls the temperature of the battery so that the temperature is within a predetermined temperature range; an SOC calculation and determination unit that acquires a voltage value of the battery controlled within an operating range and determines whether or not the voltage value is likely to exceed the operating range; Further equipped with The temperature control unit is When the battery satisfies the required input / output and there is a possibility that the voltage value will exceed the operating range, The temperature control of the battery is performed beyond the predetermined temperature range. The charge / discharge control device according to claim 2 .

4. a resistance value acquiring unit that acquires an internal resistance value of the battery; a target resistance value setting unit that sets a target resistance value that is a target internal resistance value of the battery; Further equipped with The temperature control unit is If there is a possibility that the voltage value may exceed an operable range, so that the internal resistance value of the battery approaches the target resistance value. Controlling the temperature of the battery The charge / discharge control device according to claim 3 .

5. The temperature control unit further includes: If the electricity selling price meets the target price, Controlling the temperature of the battery The charge / discharge control device according to claim 4.

6. A step of controlling charging and discharging of the battery within a standard usage range; obtaining required inputs and outputs to and from a power grid and required times; a step of calculating a current predicted full charge capacity, which is a full charge capacity of the battery that is predicted to change with the required time when the battery is charged or discharged beyond the standard use range in order to satisfy the required input / output and the required time; determining whether the currently predicted full charge capacity exceeds a target full charge capacity line, which is information defining a target full charge capacity for each operation time; Including, In the step of performing the charge / discharge control, When the current predicted full charge capacity exceeds the target full charge capacity line, The battery is charged and discharged beyond the standard operating range. Charge and discharge control method.

7. On the computer, A step of controlling charging and discharging of the battery within a standard usage range; obtaining required inputs and outputs to and from a power grid and required times; a step of calculating a current predicted full charge capacity, which is a full charge capacity of the battery that is predicted to change with the required time when the battery is charged or discharged beyond the standard use range in order to satisfy the required input / output and the required time; determining whether the currently predicted full charge capacity exceeds a target full charge capacity line, which is information defining a target full charge capacity for each operation time; Run the command, In the step of performing the charge / discharge control, When the current predicted full charge capacity exceeds the target full charge capacity line, The charging and discharging of the battery is controlled beyond the standard operating range. program.

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