WO2013128985A1 - 蓄電池制御装置、蓄電池制御方法、プログラム、蓄電システム、および電源システム - Google Patents
蓄電池制御装置、蓄電池制御方法、プログラム、蓄電システム、および電源システム Download PDFInfo
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- WO2013128985A1 WO2013128985A1 PCT/JP2013/051376 JP2013051376W WO2013128985A1 WO 2013128985 A1 WO2013128985 A1 WO 2013128985A1 JP 2013051376 W JP2013051376 W JP 2013051376W WO 2013128985 A1 WO2013128985 A1 WO 2013128985A1
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- Prior art keywords
- charge
- storage battery
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- charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/50—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially
- H02J7/52—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially for charge balancing, e.g. equalisation of charge between batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present disclosure relates to a storage battery control device, a storage battery control method, a program, an electricity storage system, and a power supply system, and in particular, a storage battery control device capable of exhibiting better performance in a configuration in which a plurality of storage batteries are connected.
- Storage battery control method, program, storage system, and power supply system are connected to a storage battery control device, and in particular, a storage battery control device capable of exhibiting better performance in a configuration in which a plurality of storage batteries are connected.
- a storage system configured by connecting a plurality of storage batteries is used.
- the performance of the storage system differs according to the control method for charging or discharging each storage battery.
- Patent Document 1 separately detects the voltages of a plurality of storage batteries connected in parallel, and charges the storage batteries whose voltages are equal to or less than the threshold to the storage voltage, thereby causing overdischarge during storage of the storage batteries.
- An energy storage system is disclosed to prevent.
- the voltage of the storage battery, the temperature, and the like because the charging is performed by a control method based on a viewpoint of charging safely and charging to a full charge.
- the amount of charge was determined by measuring the current, internal resistance, and the like.
- the charging state of each storage battery varies due to the fact that charging is performed by a control method based on viewpoints of safe charging and full charging. It may occur.
- the time that can be driven with the maximum capacity at the time of a power failure becomes short.
- the charging system configured by connecting a plurality of storage batteries, it is possible to exhibit good performance of the entire system by extending the life of the entire system and extending the time that can be driven with the maximum capacity at the time of a power failure. It was asked to do so.
- This indication is made in view of such a situation, and enables it to exhibit better performance in the composition where a plurality of storage batteries were connected.
- a setting unit in which the order of charging or discharging the storage battery is preset according to at least two parameters that define the life and output of the storage battery storing electric power; And a determination unit that determines the storage battery to be charged or discharged among the plurality of storage batteries based on the parameters acquired from the plurality of storage batteries with reference to the order set in advance in a unit.
- the order of charging or discharging the storage battery is set in advance in accordance with at least two parameters that define the life and output of the storage battery storing power. And determining the storage battery to be charged or discharged among the plurality of storage batteries based on the parameters acquired from the plurality of storage batteries with reference to the order of priority.
- the storage system includes a plurality of storage batteries that store electric power, and a setting in which the order of charging or discharging the storage batteries is preset according to at least two parameters that define the life and output of the storage batteries. It is determined to determine the storage battery to be charged or discharged among the plurality of storage batteries based on the parameters acquired from the plurality of storage batteries with reference to the unit and the order set in advance in the setting unit. And a unit.
- a power supply system is connected to a power supply including at least a DC power supply using natural energy and an AC power supply via a power system, and the power supply via a power wiring,
- the storage battery according to the load to be consumed, a plurality of storage batteries connected in parallel to the power supply via the power wiring and storing power, and at least two parameters defining the life and output of the storage battery
- a setting unit in which the order of charging or discharging is set in advance and the order set in advance in the setting unit, among the plurality of storage batteries based on the parameters acquired from the plurality of storage batteries
- a determination unit that determines the storage battery to be charged or discharged.
- the order in which the storage battery is charged or discharged is preset according to at least two parameters that define the life and output of the storage battery that stores power, and the plurality is referred to Among the plurality of storage batteries, the storage battery to be charged or discharged is determined based on the parameters acquired from the storage batteries.
- FIG. 1 is a block diagram showing a configuration example of a first embodiment of a power storage system to which the present technology is applied.
- the storage system 11 is configured to include three storage devices 12-1 to 12-3 and a control device 13. Further, in the power supply system including the storage system 11, the power supply 15 for supplying power via the power system and the loads 16-1 and 16-2 consuming power are connected via the power wiring 14 for transmitting power. And be configured.
- the power supply 15 includes a direct current power supply using natural energy such as sunlight or wind power or using a fuel cell, and an alternating current power supply such as a commercial power supply that supplies electric power via a power system.
- Power storage devices 12-1 to 12-3 are connected in parallel to power supply 15 via power wiring 14, and are connected to loads 16-1 and 16-2. Power storage devices 12-1 to 12-3 store the power supplied from power supply 15 via power wiring 14, and store the stored power via loads 16-1 and 16-1 via power wiring 14. Supply to 2.
- Power storage devices 12-1 to 12-3 include storage batteries 21-1 to 21-3, charging units 22-1 to 22-3, discharging units 23-1 to 23-3, and a battery management system (BMS: Battery). Management System) 24-1 to 24-3 are respectively provided. Power storage devices 12-1 to 12-3 are similarly configured, and hereinafter, power storage devices 12-1 to 12-3 are referred to as power storage device 12 when it is not necessary to distinguish them. The same applies to storage batteries 21-1 to 21-3, charging units 22-1 to 22-3, discharging units 23-1 to 23-3, and battery management systems 24-1 to 24-3.
- the storage battery 21 can store power of a predetermined capacity, and can maintain a specified charging capacity until charging and discharging of a specified number of times are performed.
- the ratio of the remaining charge amount of the power stored in the storage battery 21 to the rated capacity with which the storage battery 21 can store power is referred to as the state of charge of the storage battery 21.
- the number of times of charge and discharge is called the number of charge and discharge.
- the state of charge defines the output of the storage battery 21, and the number of times of charging and discharging defines the life of the storage battery 21.
- charging unit 22 performs AC / DC conversion of the power supplied via power wiring 14 according to the voltage of storage battery 21 to charge storage battery 21.
- the discharge unit 23 DC / AC converts the power stored in the storage battery 21 according to the control of the control device 13, for example, in accordance with the phase of the power transmitted via the power wiring 14 or the like. Output and supply to loads 16-1 and 16-2.
- the battery management system 24 communicates with the control device 13 to manage the storage battery 21. For example, the battery management system 24 measures the charge state of the storage battery 21 or counts the number of charge / discharge cycles of the storage battery 21 and transmits data indicating the charge state of the storage battery 21 and the number of charge / discharge cycles to the control device 13 .
- the control device 13 is configured to include an input / output unit 31, a memory 32, and a CPU (Central Processing Unit) 33.
- an input / output unit 31 a memory 32, and a CPU (Central Processing Unit) 33.
- a CPU Central Processing Unit
- the input / output unit 31 is an interface for communicating with the storage device 12, acquires data transmitted from the battery management system 24, transmits a control signal instructing charging to the charging unit 22, and discharges it. A control signal instructing discharge to the unit 23 is transmitted.
- the memory 32 stores programs executed by the CPU 33, various data required when the CPU 33 executes the programs, and the like. For example, when the CPU 33 executes a program for controlling charging of the power storage devices 12-1 to 12-3, the memory 32 refers to charging for determining the charging order of the power storage devices 12-1 to 12-3.
- the order table (see FIG. 2 described later) is stored.
- the CPU 33 reads out and executes a program stored in the memory 32, controls the entire storage system 11, and controls, for example, charging of the storage devices 12-1 to 12-3.
- the charging order table is set based on the charging state of the storage battery 21 and the number of times of charging and discharging.
- the charging order table is configured by six rows and six columns of squares, and in each square of the charging order table, the charging with the lowest priority is performed from the charging order "1" having the highest priority.
- the order up to "36" is set.
- the column direction of the charge order table is divided by the charge / discharge frequency CNT0 to CNT6, the charge / discharge frequency CNT0 is set to 0, and the charge / discharge frequency CNT6 is, for example, a number according to the charge capacity of the storage battery 21 (an example And 3000 to 4000 times). Furthermore, the charge / discharge number CNT3 is, for example, a number obtained by integrating the number of days required for the replacement of the storage battery 21 to the average number of charge / discharges per day as a first threshold serving as a reference for prompting replacement of the storage battery 21. The number of times of adding a predetermined margin factor is set.
- the charge / discharge times CNT1 and CNT2 are set to equally divide the charge / discharge times CNT0 to the charge / discharge times CNT3.
- the charge / discharge times CNT4 and CNT5 are equal for the charge / discharge times CNT3 to the charge / discharge times CNT6. It is set to be divided into The charge / discharge times CNT1 and CNT2, and the charge / discharge times CNT4 and CNT5 may not be equal, and may be set at arbitrary rates.
- the row direction of the charge order table is divided by the charge states SOC0 to SOC6.
- the charge state SOC0 is set to 0%
- the charge state SOC6 is set to 100%.
- the state of charge SOC3 is, for example, a value obtained by integrating the necessary time and the necessary power as a second threshold serving as a reference for determining whether or not to perform the process of determining the charge order.
- a value obtained by adding a predetermined margin factor to the value divided by the rated capacity is set.
- charge states SOC1 and SOC2 are set to equally divide charge state SOC0 to charge state SOC3, and charge states SOC4 and SOC5 are set to equally divide charge state SOC3 to charge state SOC6. Be done.
- the charge order table is classified into first to fourth groups according to the first threshold charge / discharge frequency CNT3 and the second threshold charge state SOC3.
- the first group consists of nine squares whose charge / discharge frequency is less than or equal to the charge / discharge frequency CNT3 and the charge state is less than or equal to the charge state SOC3.
- the second group is where the charge / discharge frequency is the charge / discharge frequency CNT3. It consists of the nine squares below whose state of charge is greater than state of charge SOC3.
- the third group consists of nine cells whose charge / discharge frequency is greater than charge / discharge frequency CNT3 and whose charge state is less than or equal to charge state SOC3.
- the fourth group is charged / discharge frequency is It consists of nine squares which are larger than the number of times of discharge CNT3 and whose state of charge is larger than state of charge SOC3.
- the charging order “1” having the highest priority to the charging order “9” is set, and in the 9th square of the second group, the first square is set.
- the charging order “10” to the charging order “18” having the highest priority next to the group are set.
- the charging order "19" having the highest priority next to the second group to the charging order "27” are set, and the ninth square of the fourth group is set.
- the charging order having the highest priority is sequentially set preferentially from the lower row in the row where the number of times of charge and discharge is low and from the lower row in the charge state in each row.
- charge is applied to the grid divided by charge states SOC0 and SOC1 with the lowest charge state.
- Order "1" is set, and charge order "2" is set to a grid divided by state of charge SOC1 and SOC2 with next lower state of charge, and state of charge is classified with next lower state of charge SOC2 and SOC3
- the charging order "3" is set to the square.
- the charge order "4" is in the charge state divided into charge states SOC0 and SOC1 with the lowest charge state.
- the charge order "5" is set to the grid which is set and is divided by the next lower charge state SOC1 and SOC2 and the charge order is set to the grid next divided by the charge state SOC2 and SOC3 next to the charge state.
- "6" is set.
- the charge order "7" is set to the charge condition SOC0 and SOC1 where the charge condition is lowest.
- Charge order “8” is set in the grid divided by charge state SOC1 and SOC2 with the next lower charge state, and charge order “2” is charged into grid next divided with charge state SOC2 and SOC3 with the next lowest charge state 9 "is set.
- the charging order “1” from the charging order “1” is given priority from the squares with low charging number and the charging order “1” from the squares with low charging state in each row. Up to 9 "is set.
- the charge order "10" to the charge order “18” are set, and in the third group, the charge order "19" to the charge order “27” are set, and the fourth In the group, the charging order "28" to the charging order "36" are set.
- the charge order table in which the charge order is set as described above is stored in the memory 32 of the control device 13. Then, in control device 13, CPU 33 determines the charge order of power storage device 12 with reference to the charge order table, and executes a program for controlling the charge of power storage device 12 based on the charge order to control the storage battery.
- the function as an apparatus is realized.
- FIG. 3 shows a function when CPU 33 determines the charging order of power storage device 12 with reference to the charging order table, and functions as a storage battery control device for controlling charging of power storage device 12 based on the charging order.
- a block diagram is shown.
- the storage battery control device 41 includes a data acquisition unit 42, a charge order determination unit 43, a charge instruction unit 44, and a determination unit 45.
- Data acquisition unit 42 periodically communicates with battery management systems 24-1 to 24-3 of power storage devices 12-1 to 12-3 via input / output unit 31 in FIG. Data indicating the charge state and charge / discharge frequency of 1 to 21-3 is acquired. Then, data acquisition unit 42 supplies data indicating the charge state and the number of times of charge and discharge of storage batteries 21-1 to 21-3 to charge order determination unit 43 and determination unit 45.
- the charge order determination unit 43 refers to the charge order table stored in the memory 32 based on the data indicating the charge state and the charge / discharge frequency of the storage batteries 21-1 to 21-3 supplied from the data acquisition unit 42. , Determine the charge order for the storage batteries 21-1 to 21-3.
- the charge instructing unit 44 selects the storage battery 21 to be charged in accordance with the charging order of the storage batteries 21-1 to 21-3 determined by the charging order determination unit 43. For example, when charging one unit at a time, charging instruction unit 44 charges storage battery 21 for which the highest priority charging order is determined among the charging sequences of storage batteries 21-1 to 21-3. It selects as a storage battery 21 to perform. Then, the charge instructing unit 44 transmits a control signal instructing charging to the charging unit 22 of the selected storage battery 21 via the input / output unit 31, and causes the charging unit 22 to charge the storage battery 21.
- determination unit 45 performs the process of determining the charge order by charge order determination unit 43 based on data indicating the charge states of storage batteries 21-1 to 21-3 periodically acquired by data acquisition unit 42 Determine For example, determination unit 45 determines the charge order determination unit when the state of charge of storage battery 21 during charging becomes 100% and when the state of charge of storage battery 21 during charging exceeds the second threshold described above. It is determined that the process of determining the charging order is to be performed according to S43.
- the column direction is divided by the number of times of charging / discharging 0 times, 25 times, 50 times, 75 times and 100 times, and the row direction is 0%, 25%, 50%, 75
- the charge order table divided by the% and 100% charge states. Further, in the charging order table, the first threshold described above is set to 50 times, the second threshold described above is set to 50%, and the charging order "1" to the charging order "16" are set. It is done.
- the state of charge of the storage battery 21-1 is 51%, and the number of times of charging and discharging of the storage battery 21-1 is 10 times. Is shown. Similarly, it is shown that the state of charge of storage battery 21-2 is 10%, and the number of times of charge and discharge of storage battery 21-2 is 10 times, and the state of charge of storage battery 21-3 is 10%. And, it is assumed that it is shown that the number of times of charging and discharging of the storage battery 21-3 is 30 times.
- the charge order determination unit 43 determines that the charge state of the storage battery 21-1 exceeds 50% and is 75% or less, and the charge / discharge frequency of the storage battery 21-1 is 25 times or less. Decide the charge order "5" for -1. Further, since the charge state of storage battery 21-2 is 25% or less and the charge / discharge frequency of storage battery 21-2 is 25 times or less, charge order determination unit 43 charges the storage battery 21-2 in charge order. Decide "1". Similarly, the charge order determination unit 43 determines that the state of charge of the storage battery 21-3 is 25% or less and the number of times of charge and discharge of the storage battery 21-3 is more than 25 and not more than 50. The charging order "3" is determined with respect to.
- charge instructing unit 44 transmits a control signal instructing charge to storage battery 21-2 of storage batteries 21-1 to 21-3 in which the charging order “1” with the highest priority is set.
- the discharging unit 23-2 charges the storage battery 21-2.
- determination unit 45 determines the charge order according to the state of charge of storage battery 21-2 being charged exceeding the second threshold of 50% based on data periodically acquired by data acquisition unit 42. It is determined that the process of determining
- data acquisition unit 42 acquires data indicating the charge state and the number of times of charge and discharge of storage batteries 21-1 to 21-3, and charge order determination unit 43 determines the charge order based on those data. Do the process.
- the charge order determination unit 43 refers to the charge order table and charges the storage cell 21-2 with the charge order “ Determine "5". Since the state of charge and the number of times of charge and discharge of storage battery 21-1 have not changed, storage battery 21-1 remains in the charge order "5", and similarly storage battery 21-3 remains in the charge order "3". It is.
- charge instructing unit 44 transmits a control signal instructing charging to storage battery 21-3 of storage batteries 21-1 to 21-3 to which the highest priority charging order “3” is set.
- the discharging unit 23-3 charges the storage battery 21-3. Further, at this time, charging of the storage battery 21-2 is completed, and the number of times of charging and discharging of the storage battery 21-2 is counted up to 11 times.
- determination unit 45 determines the charge order as the state of charge of storage battery 21-3 being charged exceeds the second threshold of 50%. It is determined that the process of determining
- data acquisition unit 42 acquires data indicating the charge state and the number of times of charge and discharge of storage batteries 21-1 to 21-3, and charge order determination unit 43 determines the charge order based on those data. Do the process.
- the charge order determination unit 43 refers to the charge order table and charges the storage cell 21-3 with the charge order “ Decide 7 ". Since the state of charge and the number of times of charge and discharge of storage battery 21-1 have not changed, storage battery 21-1 remains in the charge order "5", and similarly storage battery 21-2 remains in the charge order "5". It is.
- storage batteries 21-1 and 21-2 are both identical in charge order "5".
- charge instructing unit 44 compares the number of times of charge and discharge of storage batteries 21-1 and 21-2, and selects the one having the smaller number of charge / discharge cycles as storage battery 21 to be charged. That is, in this case, since the number of times of charge and discharge of storage battery 21-1 is 10 and the number of charge and discharge of storage battery 21-2 is 11, the charge instructing unit 44 charges storage battery 21-1. And transmits a control signal for instructing the storage battery 21-1 to be charged. In response to this, charging of storage battery 21-1 is performed by discharging unit 23-1. Further, at this time, charging of the storage battery 21-3 is completed, and the number of times of charging and discharging of the storage battery 21-3 is counted up to 31 times.
- the determination unit 45 determines based on data periodically acquired by the data acquisition unit 42. It is determined that the process of determining the charging order is to be performed.
- data acquisition unit 42 acquires data indicating the charge state and the number of times of charge and discharge of storage batteries 21-1 to 21-3, and charge order determination unit 43 determines the charge order based on those data. Do the process.
- the charging order determination unit 43 refers to the charging order table to charge the storage battery 21-1 “ Determine 6 ". Since the state of charge and the number of times of charge and discharge of storage battery 21-2 have not changed, storage battery 21-2 remains in the charge order "5", and similarly storage battery 21-3 remains in the charge order "7". It is.
- charge instructing unit 44 transmits a control signal instructing charging to storage battery 21-2 of storage batteries 21-1 to 21-3 to which the highest priority charging order “5” is set.
- the discharging unit 23-2 charges the storage battery 21-2. Further, at this time, charging of the storage battery 21-1 is completed, and the number of times of charging and discharging of the storage battery 21-1 is counted up to 11 times.
- charging is performed until the state of charge of the storage battery 21-2 reaches 100%, and the number of times of charging and discharging of the storage battery 21-2 is counted up to 12 times. The same process is repeated.
- step S11 the data acquisition unit 42 acquires, from all the storage batteries 21 included in the storage system 11, data indicating the charge state and the number of times of charge and discharge. Then, the data acquisition unit 42 supplies data indicating the charge state of the storage batteries 21-1 to 21-3 and the number of times of charge and discharge to the charge order determination unit 43.
- step S12 the charge order determination unit 43 refers to the charge order table stored in the memory 32 based on the data supplied from the data acquisition unit 42, as described above with reference to FIGS. , Determine the charge order for the storage batteries 21-1 to 21-3.
- step S13 the charge instructing unit 44 transmits a control signal for instructing the charging unit 22 of the storage battery 21 having the high priority to be charged according to the charging order determined by the charging order determining unit 43 in step S12. Send.
- the charge instructing unit 44 compares the number of times of charge and discharge of those storage batteries 21 and charges the one with the smaller number of charge and discharge times. Instruct
- step S14 the determination unit 45 performs the process of determining the charge order by the charge order determination unit 43 based on the data indicating the charge state of the storage batteries 21-1 to 21-3 acquired regularly by the data acquisition unit 42. It is determined whether or not to do. For example, as described above with reference to FIGS. 4 and 5, when the state of charge of storage battery 21 being charged exceeds the second threshold described above, determination unit 45 determines the charge order by charge order determination unit 43. It is determined that the process to be determined is to be performed.
- step S14 the process is on standby until the charge order determination unit 43 determines that the process of determining the charge order is to be performed, and the charge order determination unit 43 determines that the process of determining the charge order is to be performed. Returning to S11, the same processing is performed thereafter.
- the order of charging each of storage batteries 21-1 to 21-3 can be determined based on the state of charge and the number of times of charging of storage batteries 21-1 to 21-3.
- storage system 11 can charge both the life of storage batteries 21-1 to 21-3 and the state of charge of storage batteries 21-1 to 21-3 in a well-balanced manner. Good performance can be exhibited.
- the storage battery 21 does not have the number of charge / discharge cycles of any one of the storage batteries 21-1 to 21-3 projecting or variations in the charge state of the storage batteries 21-1 to 21-3. -1 to 21-3 are charged. As a result, it is possible to prevent the overall performance of the system from being degraded, such as the lifetimes of the storage batteries 21-1 to 21-3 being uneven, and the time during which a maximum capacity can be driven during a power failure can be shortened.
- the storage system 11 can extend the life of the entire system by averaging the lives of the storage batteries 21-1 to 21-3, and can further increase the time that can be driven with the maximum capacity at the time of a power failure. Therefore, better performance can be exhibited.
- storage system 11 determines the charging order of storage batteries 21-1 to 21-3 using the charging order table in which the charging order is set based on the charging state and the number of times of charging, more simple processing The order of charging can be determined.
- the storage system 11 since the storage batteries 21 are charged one by one in accordance with the charging order, it is possible to avoid the flow of a large current as when charging a plurality of storage batteries 21 simultaneously.
- the introduction of the storage system 11 can prevent an increase in the contracted power, and can reduce the discharge opportunity such as peak cut.
- a of FIG. 7 shows storage batteries 21-1 to 21-3 having variations in charge state
- B of FIG. 7 shows storage batteries 21-1 to 21-3 having no variation in charge state. It is done.
- the charge state of the storage battery 21-1 is 50%
- the charge state of the storage battery 21-2 is 30%
- the charge state of the storage battery 21-3 is 10%.
- the storage capacity of storage batteries 21-1 to 21-3 is 10 KWh
- the storage capacity of storage battery 21-1 is 5 KWh
- the storage capacity of storage battery 21-3 is 3 KWh.
- the capacity stored in 21-3 is 1 KWh.
- the entire storage batteries 21-1 to 21-3 are The time that can be driven by 15 KW, which is the maximum capacity of, is taken until the power stored in the storage battery 21-3 is consumed. Thereafter, after driving by 10 KW until the power stored in the storage battery 21-2 is consumed, it is driven by 5 KW by only the storage battery 21-1.
- the entire storage batteries 21-1 to 21-3 are The time that can be driven with 15 KW, which is the maximum capacity of, is taken until the power stored in all of the storage batteries 21-1 to 21-3 is consumed. That is, the storage batteries 21-1 to 21-3 can output 15 KW until the end of consuming their respective power.
- the total capacity (area of the graph) of the storage batteries 21-1 to 21-3 is the same as the storage battery 21-1 even though both are the same at 9 KWh in the example of A in FIG. 7 and the example of B in FIG.
- the time which can be driven by 15 KW which is the maximum capacity of the whole of 21 to 21 is longer when no variation occurs in the state of charge of the storage batteries 21-1 to 21-3.
- the storage system 11 refers to the charging order table in which the charging order is set based on the charging state, and determines the charging order of the storage batteries 21-1 to 21-3. It is possible to suppress the occurrence of variations in the state of charge of 21-3 and to charge the battery more uniformly. Therefore, in the storage system 11, even in the event of a power failure, the time that can be driven with the maximum capacity can be made longer.
- FIG. 8 is divided according to the number of charge / discharge times and the charge state, and the discharge order is set to be symmetrical with the charge order set in the charge order table.
- a discharge order table is shown. That is, in the discharge order table, discharge orders with high priorities are sequentially set preferentially from the row of squares having a small number of times of charge and discharge, and from the square of high charge state in each row.
- the priority is given to the ninth square of the second group of nine squares whose charge state is equal to or less than the charge number of times CNT3 and whose charge state is larger than the charge state SOC3.
- the highest discharge order "1" to the discharge order "9” are set.
- priority is given next to the second group.
- the discharge order "10" having the highest rank to the discharge order "18" are set.
- the fourth group of nine squares with the number of charge / discharge cycles greater than the number of charge cycles CNT3 and the state of charge greater than the state of charge SOC3 has the next highest priority after the first group.
- the discharge order "19" to the discharge order "27” are set.
- the third group consisting of nine squares whose number of charge / discharge cycles is greater than the number of charge / discharge cycles CNT3 and the charge state is less than or equal to the charge state SOC3 a discharge with the next highest priority next to the fourth group
- the order from "28" to "36" is set.
- the CPU 33 refers to the discharge order table in which the discharge order is set as described above, and determines the charge order based on the number of times of charge and discharge and the charge state of the storage batteries 21-1 to 21-3. Similarly, the discharge order is determined. Thereby, even when the storage batteries 21-1 to 21-3 are discharged, it is possible to prevent the occurrence of variation in the number of times of charging and discharging of the storage batteries 21-1 to 21-3, and the storage batteries 21-1 to 21-3. It can be discharged so that the charge condition of Also in this case, the storage system 11 can exhibit better performance as the entire system.
- FIG. 9 is a block diagram showing a configuration example of a second embodiment of a power storage system to which the present technology is applied.
- the storage system 11 ′ shown in FIG. 9 the same reference numerals are assigned to configurations common to those in the storage system 11 of FIG. 1, and detailed description will be omitted. That is, the storage system 11 ′ includes storage batteries 21-1 to 21-3 and battery management systems 24-1 to 24-3, and the power supply 15 and the loads 16-1 and 16 are connected via the power wiring 14. It is common to the power storage system 11 of FIG. 1 in that it is connected.
- the storage system 11 includes power conditioners 51-1 to 51-3, and the power conditioners 51-1 to 51-3 include control units 52-1 to 52-3.
- a configuration different from that of the storage system 11 of FIG. 1 is that the storage batteries 21-1 to 21-3 are connected to the power wiring 14 via 51-1 to 51-3, respectively.
- Power conditioners 51-1 to 51-3 are respectively configured in the same manner, and hereinafter, when it is not necessary to distinguish power conditioners 51-1 to 51-3, power conditioners 51-1 to 51-3 are referred to as power conditioner 51.
- Power conditioners 51-1 to 51-3 adjust the input and output power according to the charge states of storage batteries 21-1 to 21-3, respectively, to charge storage batteries 21-1 to 21-3 with power. , Discharge power from the storage batteries 21-1 to 21-3.
- control units 52-1 to 52-3 are connected to the corresponding battery management systems 24-1 to 24-3 via communication wires, and the control units 52-1 to 52-3 are connected to each other for communication wires. Connected through. Further, control units 52-1 to 52-3 obtain data indicating the charge state and the number of times of charge and discharge of storage batteries 21-1 to 21-3 from corresponding battery management systems 24-1 to 24-3. Then, control units 52-1 to 52-3 communicate with each other to determine the charge order of storage batteries 21-1 to 21-3 to perform charging.
- control units 52-1 to 52-3 refer to the charging order table to determine the charging order of corresponding storage batteries 21-1 to 21-3. Then, the control units 52-1 to 52-3 compare the charging orders with each other, and the control unit 52 corresponding to the storage battery 21 of the charging order with the highest priority performs charging of the storage battery 21. Then, when the state of charge of the storage battery 21 exceeds the second threshold, the control unit 52 corresponding to the storage battery 21 being charged notifies the other control unit 52 to perform processing for determining the charging order. , The charge order is determined again.
- the storage system 11 ′ can exhibit better performance as the entire system without providing the control device 13 that controls the entire system as the storage system 11 does, as the storage system 11 does.
- charge order is set beforehand in the charge order table stored in memory 32 by CPU 33, and the charge order of storage batteries 21-1 to 21-3 is referred to with reference to the charge order table.
- the CPU 33 may determine the charge order without referring to the charge order table.
- the CPU 33 uses the determination conditions in which the charge order is set in advance based on the charge / discharge times and the charge state, and the charge / discharge times and charge state of the storage batteries 21-1 to 21-3. It is possible to determine the charging order determined by.
- the charging order is determined with reference to the charging order table created according to each parameter.
- the above-described series of processes may be performed by hardware or software.
- the various functions are executed by installing a computer in which a program constituting the software is incorporated in dedicated hardware or various programs. Can be installed from, for example, a general-purpose personal computer from the program storage medium.
- those programs are stored in advance in the storage unit, and via a communication unit including a network interface or the like, or a magnetic disk (including a flexible disk), an optical disk (CD-ROM (Compact Disc-Read Only) It can be installed in a computer via a drive for driving removable media such as Memory), DVD (Digital Versatile Disc), magneto-optical disc, or semiconductor memory.
- a communication unit including a network interface or the like, or a magnetic disk (including a flexible disk), an optical disk (CD-ROM (Compact Disc-Read Only) It can be installed in a computer via a drive for driving removable media such as Memory), DVD (Digital Versatile Disc), magneto-optical disc, or semiconductor memory.
- the processes described with reference to the above-described flowchart do not necessarily have to be processed in chronological order according to the order described as the flowchart, and processes performed in parallel or individually (for example, parallel processes or objects Processing) is also included.
- the system represents the entire apparatus configured by a plurality of apparatuses.
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Abstract
Description
Claims (9)
- 電力を蓄積する蓄電池の寿命および出力を規定する少なくとも2つのパラメータに応じて、前記蓄電池を充電または放電する順位が予め設定された設定部と、
前記設定部に予め設定されている順位を参照し、複数の前記蓄電池から取得された前記パラメータに基づいて、複数の前記蓄電池のうちの、充電または放電を行う前記蓄電池を決定する決定部と
を備える蓄電池制御装置。 - 前記蓄電池の寿命および出力を規定する2つのパラメータは、前記蓄電池の充電状態および充放電回数であり、
前記設定部は、前記蓄電池の充電状態および充放電回数に基づいて、前記蓄電池を充電または放電する順位が予め設定されたテーブルである
請求項1に記載の蓄電池制御装置。 - 前記テーブルには、充放電回数が少ないマス目の行から優先的に、かつ、それぞれの行における充電状態が低いマス目から優先的に、前記蓄電池を充電する順位が設定される
請求項2に記載の蓄電池制御装置。 - 前記テーブルには、充放電回数が少ないマス目の行から優先的に、かつ、それぞれの行における充電状態が高いマス目から優先的に、前記蓄電池を放電する順位が設定される
請求項2に記載の蓄電池制御装置。 - 複数の前記蓄電池から前記パラメータを取得する取得部と、
前記取得部が充電中の前記蓄電池から取得した前記パラメータが所定の閾値を超えたときに、前記決定部が充電または放電を行う前記蓄電池を決定する処理を行うと判定する判定部と
をさらに備える請求項1乃至5のいずれかに記載の蓄電池制御装置。 - 電力を蓄積する蓄電池の寿命および出力を規定する少なくとも2つのパラメータに応じて、前記蓄電池を充電または放電する順位が予め設定されており、
予め設定されている順位を参照し、複数の前記蓄電池から取得された前記パラメータに基づいて、複数の前記蓄電池のうちの、充電または放電を行う前記蓄電池を決定する
ステップを含む蓄電池制御方法。 - 電力を蓄積する蓄電池の寿命および出力を規定する少なくとも2つのパラメータに応じて、前記蓄電池を充電または放電する順位が予め設定されており、
予め設定されている順位を参照し、複数の前記蓄電池から取得された前記パラメータに基づいて、複数の前記蓄電池のうちの、充電または放電を行う前記蓄電池を決定する
ステップを含む処理をコンピュータに実行させるプログラム。 - 電力を蓄積する複数の蓄電池と、
前記蓄電池の寿命および出力を規定する少なくとも2つのパラメータに応じて、前記蓄電池を充電または放電する順位が予め設定された設定部と、
前記設定部に予め設定されている順位を参照し、複数の前記蓄電池から取得された前記パラメータに基づいて、複数の前記蓄電池のうちの、充電または放電を行う前記蓄電池を決定する決定部と
を備える蓄電システム。 - 少なくとも自然エネルギーを利用した直流電源、および、電力系統を介した交流電源のいずれか一方を含む電源と、
前記電源に電力配線を介して接続され、電力を消費する負荷と、
前記電源に対して前記電力配線を介して並列的に接続され、電力を蓄積する複数の蓄電池と、
前記蓄電池の寿命および出力を規定する少なくとも2つのパラメータに応じて、前記蓄電池を充電または放電する順位が予め設定された設定部と、
前記設定部に予め設定されている順位を参照し、複数の前記蓄電池から取得された前記パラメータに基づいて、複数の前記蓄電池のうちの、充電または放電を行う前記蓄電池を決定する決定部と
を備える電源システム。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/373,440 US20140361732A1 (en) | 2012-02-28 | 2013-01-24 | Storage battery control device, storage battery control method, program, power storage system and power supply system |
| DE112013001184.0T DE112013001184T5 (de) | 2012-02-28 | 2013-01-24 | Speicherbatteriesteuervorrichtung, Speicherbatteriesteuerverfahren, Programm, Stromspeichersystem und Stromquellensystem |
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| JP2012041027A JP2013179729A (ja) | 2012-02-28 | 2012-02-28 | 蓄電池制御装置、蓄電池制御方法、プログラム、蓄電システム、および電源システム |
| JP2012-041027 | 2012-02-28 |
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| JP2013179729A (ja) | 2013-09-09 |
| DE112013001184T5 (de) | 2014-11-13 |
| US20140361732A1 (en) | 2014-12-11 |
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