WO2012128252A1 - Système de stockage d'énergie - Google Patents

Système de stockage d'énergie Download PDF

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Publication number
WO2012128252A1
WO2012128252A1 PCT/JP2012/057021 JP2012057021W WO2012128252A1 WO 2012128252 A1 WO2012128252 A1 WO 2012128252A1 JP 2012057021 W JP2012057021 W JP 2012057021W WO 2012128252 A1 WO2012128252 A1 WO 2012128252A1
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WO
WIPO (PCT)
Prior art keywords
charging
power
storage battery
battery module
current
Prior art date
Application number
PCT/JP2012/057021
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English (en)
Japanese (ja)
Inventor
太田垣　和久
Original Assignee
三洋電機株式会社
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Filing date
Publication date
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Publication of WO2012128252A1 publication Critical patent/WO2012128252A1/fr

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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
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • 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 invention relates to a power storage system in which a plurality of interconnection systems including a storage battery module and a power conversion device are connected to the same system.
  • the present invention relates to a power storage system for power demand.
  • an interconnection system in which a storage battery module and a power conversion device (also called a power conditioner) are incorporated is connected between a commercial power source (system) and each load, and this interconnection system is connected to a communication system or a computer. It has been used as a backup power source in the event of a power failure in a system or the like.
  • a power conversion device also called a power conditioner
  • large-scale solar cells, wind power generators, wave power generators, etc. connecting distributed power sources with large fluctuations in power generation and interconnection systems, storing the power generated by distributed power sources in storage battery modules, The power of this storage battery module is orthogonally transformed and supplied to the system.
  • the solar cells and micro wind power generators installed in each home are connected to the interconnection system, and the electric power generated by these power generators is temporarily stored in a storage battery module, and air conditioners and microwave ovens are used in the homes. It is also used as auxiliary power when large power such as is used, or the surplus power is allowed to flow backward through the system. Adopting such an interconnection system can suppress the instantaneous use of large power from the grid, and if the grid fails, the power stored in the interconnection system can be stored in the home. It can also be used as an emergency power supply or uninterruptible power supply used as power for the equipment used. In addition, if the storage battery module is charged from the grid at night, the power consumption of the grid can be leveled by discharging at the peak of the daytime power demand.
  • Patent Document 1 the structure for extending the life of the storage battery module of the interconnection system is shown in Patent Document 1 below.
  • the power storage system disclosed in Patent Document 1 has a configuration in which a plurality of interconnected systems are interconnected, and charging / discharging of individual storage battery modules is performed under mild conditions. This prevents the battery module from becoming overcharged or overdischarged and shortening its life.
  • the power buffer device system 50 disclosed in Patent Document 1 below performs AC / DC conversion that performs AC / DC conversion of power between the system 51 and the DC bus 52 as shown in FIG. 6.
  • a power buffer 57, a sustaining power buffer 59 connected to the DC bus 52 via a second bidirectional DC / DC converter 58 in parallel with the instantaneous power buffer 57, and a control device 60 are provided.
  • the control device 60 charges and discharges the change in the instantaneous force type electric power buffer 57.
  • the instantaneous power buffer 57 for example, an electric double layer capacitor capable of instantaneous charge / discharge is used.
  • a storage battery such as a lead storage battery, a lithium ion battery, a NaS battery, or a nickel metal hydride battery capable of storing a large amount of power is used.
  • the power buffer device system 50 includes the instantaneous force type power buffer 57, even if a sudden change occurs in the loads 54a and 54b, the change can be absorbed by the instantaneous force type power buffer 57. Abrupt charging / discharging in the mold power buffer 59 can be avoided. Thereby, deterioration of the charge / discharge life of the sustaining power buffer 59 can be suppressed.
  • Patent Document 2 discloses a power storage system that controls three power sources, that is, a solar battery, a storage battery module, and a commercial power system, using a power conditioner.
  • a power conditioner 70 used in this power storage system includes a household load 72 connected to a commercial power system 71, and a power source 74 including a DC power source 73 such as a solar battery and a storage battery module.
  • a DC power source 73 such as a solar battery and a storage battery module.
  • the power conditioner 70 includes a DC-DC converter 75, an inverter circuit 76, and a charge / discharge circuit 77.
  • the direct current power of the direct current power source 73 is boosted by the DC-DC converter 75, and the inverter circuit 76 converts the direct current power of the direct current bus 78 into the alternating current power of the commercial frequency and outputs it to the commercial power system 71 of, for example, a single phase 200V.
  • the power storage means 74 is charged or discharged by a charge / discharge circuit 77 and is connected to a DC bus 78 to which a DC-DC converter 75 and a charge / discharge circuit 77 are connected.
  • charging power is supplied from the commercial power system 71 to the power storage means 74 through the inverter circuit 76 and the charging / discharging circuit 77 at night when there is no power generation by the solar battery.
  • the inverter circuit 76 is a bidirectional inverter circuit capable of converting in either DC / AC or AC / DC direction.
  • the power source selection circuit 79 receives the driving power from the first power source circuit 80 to which driving power is supplied from the DC power source 73, the second power source circuit 81 to which driving power is supplied from the power storage means 74, and the commercial power system 71. At least one power supply circuit is selected from the supplied third power supply circuit 82 and drive power is supplied to the control circuit 83.
  • the power conditioner 70 is connected via the switch Sb in order to realize a self-sustaining operation mode in which the power conditioner 70 operates as an emergency power source independent of the commercial power system 71 when the commercial power system 71 fails.
  • the self-sustained operation output 84 is provided as an output terminal of the inverter circuit 76.
  • the power buffer device system 50 disclosed in Patent Document 1 includes an instantaneous power buffer 57 and a continuous power buffer 59 having different functions, and the instantaneous power buffer 57 is connected to the loads 54a and 54b. Charging / discharging is performed when a sudden change occurs. In recent years, it has been desired to level the operation of each storage battery module in a storage system in which a plurality of interconnection systems including storage battery modules having the same function are linked. *
  • FIG. 8 is a figure which shows the relationship between elapsed time, the terminal voltage of a storage battery module, and charging current.
  • FIG. 9 is a diagram showing the relationship between the terminal voltage and the charging current of the storage battery module.
  • the internal voltage R of the storage battery module increases as the charging progresses, so that the terminal voltage Vb increases.
  • the current value becomes I2 of 1/50 to 1/20 constant voltage charging is terminated at an appropriate place, and this state is handled as a 100% charged state, that is, a fully charged state.
  • the present invention has been made to solve the problems of the prior art as described above. That is, according to the present invention, in a power storage system in which a plurality of interconnected systems including a storage battery module and a power conversion device are interconnected, the operation of the storage battery module is performed by appropriately charging and discharging each interconnected system.
  • An object of the present invention is to provide a power storage system that is leveled.
  • the present invention provides a power storage system in which a plurality of interconnected systems including a storage battery module and a power conversion device are interconnected, and shortens the time required for charging the plurality of storage battery modules to reliably prepare for power demand during discharging. It is an object of the present invention to provide a power storage system that can perform the above.
  • the power storage system of the present invention comprises: An interconnection system including a storage battery module, a power conversion device having a discharge function of converting the output of the storage battery module into AC power and superimposing it on a system, and a charging function of charging the storage battery module using the AC power of the system Is a power storage system connected to a plurality of the same system, wherein the plurality of linkage systems are controlled by a control device,
  • the controller is Set a target charge capacity less than the nominal charge capacity of the battery module,
  • Each of the interconnection systems is ranked by at least one of the past number of charges and the number of discharges to the storage battery module of each of the interconnection systems, At the time of discharging, among the connected systems that are charged, control to discharge in order from the interconnected system with a small number of times, At the time of charging, among the interconnected systems that are determined to require charging, at least one of the control that performs charging until the respective target charging capacities are performed in order from the interconnected system with the smallest number of
  • FIG. 5A is a diagram showing a change in the amount of charging power when charging a storage battery module of one interconnection system
  • FIG. 5B is a charging power when charging one storage battery module of two interconnection systems.
  • FIG. 5C is a figure which shows the change of the amount of charging electric power at the time of charging simultaneously about the storage battery module of two connected systems.
  • a load 12 is connected to a system 11 connected to commercial power, and is output from a storage battery module 13-1 including a plurality of storage battery modules via a power converter 14-1.
  • AC power is superimposed on the grid.
  • the storage battery module of the storage battery module 13-1 is charged at a specific time such as at night, charging power is charged from the system 11 via the power conversion device 14-1.
  • the power converter 14-1 can not only generate AC power that can be supplied from the storage battery module of the storage battery module 13-1 to the system 11, but conversely for charging the storage battery module of the storage battery module 13-1 from the system 11. DC power can be generated.
  • the power converter 14-1 is also referred to as a bidirectional power converter or a bidirectional power conditioner.
  • the storage battery module 13-1 a single storage battery, a storage battery module in which a plurality of storage batteries are connected in series or series-parallel, a storage battery module, or the like is used. .
  • a disconnecting device 15-1 is disposed between the storage battery module 13-1 and the power converter 14-1.
  • the disconnecting device 15-1 controls ON / OFF of the electrical connection between the storage battery module 13-1 and the power converter 14-1, and may be an open / close piece of a semiconductor switching element or a relay. it can. Note that the disconnecting device 15-1 may be incorporated in the storage battery module 13-1 or the power conversion device 14-1 depending on circumstances.
  • the storage battery module 13-1, the power conversion device 14-1, and the disconnecting device 15-1 are controlled by a common control device 16-1.
  • the storage battery module 13-1, the power conversion device 14-1, the disconnecting device 15-1, and the control device 16-1 form a first interconnection system 17-1.
  • the power conversion device 14-1 includes a step-up / step-down unit and an AC / DC bidirectional conversion unit (not shown), for example.
  • the step-up / step-down unit boosts the DC power of the storage battery module 13-1 to a predetermined voltage and outputs it to the AC / DC bidirectional converter, and the DC output of the AC / DC bidirectional converter is a predetermined voltage. And a function of charging the storage battery module 13-1 by stepping down the voltage.
  • the AC / DC bidirectional conversion unit converts the AC power from the system 11 into DC power and outputs it to the step-up / down unit, and converts the DC power from the step-up / down unit into AC power into the system. And a function to supply.
  • the control device 16-1 controls charging / discharging of the storage battery module 13-1 by switching the functions of the step-up / step-down unit and the AC / DC bidirectional conversion unit.
  • the control devices 16-1 to 16-5 are connected to each other by a signal line 18.
  • any signal line 18 can be selected, for example, when communicating by daisy chain connection or when communicating by LAN connection.
  • the electric water heater 19 and the electric power from direct current generators, such as the solar cell 20, are connected to the system
  • the power storage system 10 of the first embodiment operates as follows. First, any one of the first to fifth interconnection systems 17-1 to 17-5 is defined as a master interconnection system.
  • the first interconnection system 17-1 will be described as a master interconnection system, and the other four interconnection systems will be described as slave interconnection systems.
  • the control device 16-1 of the first interconnection system 17-1 that is the master interconnection system is the control device 16-2 of the second to fifth interconnection systems 17-2 to 17-5 that is the slave interconnection system.
  • 16-5 collect signals related to the past charge / discharge states of the storage battery modules 13-2 to 13-5 via the signal line 18, and charge / discharge based on the signals related to the past charge / discharge states. Create and execute schedules. Signals related to past charge / discharge states include, for example, charge count, total charge energy, total charge time, total discharge time, average charge / discharge current, number of discharge currents greater than a specified value, number of charge currents greater than a specified value, etc. Is done.
  • the signal regarding the past charge / discharge state may use the past number of discharges instead of the past number of charges.
  • the interconnection system 17-1 to 17-5 is controlled by the control device 16-1 depending on the number of times of charging (or the number of times of discharging).
  • the storage battery modules are ranked.
  • the third charging system 17-3 and the fourth connecting system 17-4 with 99 charging times are the smallest charging times, followed by the first charging with 100 charging times.
  • the storage battery modules of the interconnection system 17-1, the second interconnection system 17-2, and the fifth interconnection system 17-5 are the third interconnected system 17-3. 1, the fourth interconnected system 17-4 is No. 2, The fifth interconnection system 17-5 is ranked No. 3, the second interconnection system 17-2 is No. 4, and the first interconnection system 17-1 is No. 5.
  • the first to fifth interconnection systems 17-1 to 17-5 can be ranked by regarding that the number of times of charging is different.
  • the battery module of the third interconnection system 17-3 having the first rank is discharged.
  • the rank of the third interconnection system 17-3 is set to No. 5 at the end of this discharge, and others.
  • the ranks of the interconnected systems that were ranked 2nd to 5th were moved up from 1st to 4th in order.
  • control is performed as follows. .
  • the third interconnected system 17-3 is ranked 5th, and the ranks of the interconnected systems whose other ranks are 2-5 are moved up from 1st to 4th in order.
  • the rank of the fourth interconnection system 17-4 is set to No. 5, and the rank of the interconnection system having the other ranks of No. 2 to No. 5 is raised to No. 1 to No. 4 in order. Such an operation is repeated until necessary power is supplied.
  • the interconnection systems are charged in the same order as the above-described discharging order. However, if there is an interconnected system that was not discharged due to a small amount of discharge requested from the load, the interconnected system that was not discharged and the interconnected system with a remaining capacity exceeding a predetermined capacity shall not be charged. To do.
  • capacitance about 20% can be suitably set in the range larger than the predetermined charge stop remaining capacity mentioned above, for example.
  • the charging is normally performed until a predetermined target charging capacity, for example, 80%, is obtained by constant current charging of 1 It (IC).
  • the power storage system of the first embodiment by repeating the above-described control, the number of times of charging of the storage battery module of each interconnection system becomes the same, and in particular, the storage battery module with respect to the storage battery module of a specific interconnection system The charge / discharge that leads to the deterioration of the battery is not concentrated. Thereby, the total charge electric energy of each interconnection system can be made uniform, and various charge / discharge conditions of the storage battery modules in each interconnection system are made uniform.
  • interconnected systems having the same number of times of charging or discharging may be formed.
  • the electrical storage system of 1st Embodiment even if the interconnection system with the same frequency
  • the predetermined charge stop remaining capacity may be arbitrarily set to about 0% to 10%. However, if the predetermined remaining charge stop capacity is set to 0%, there is a possibility that the battery is excessively discharged due to a sudden change in the discharge current value or the like. Further, the target charge capacity in the storage battery module is set to about 80% of the full charge, but is not limited to this, and may be within the range of constant current charge in order to shorten the charge end time. If the additional charge capacity of the module is low, it may be set within a range where the additional charge is possible.
  • the control device 16-1 of the master interconnection system 17-1 includes the input power from the system 11 of the load 12 accumulated in the past, the power from the solar cell 20 and the PV power conversion device 21, and each interconnection system.
  • a daily discharge schedule (what time and what kW is required) is determined, and the entire system is operated.
  • the load follow-up control may be performed by providing a detection means 22 for the current flowing between the system 11 and the load 12.
  • the control devices 16-1 to 16-5 of the first to fifth interconnection systems 17-1 to 17-5 have the load 12 according to the current value flowing between the system 11 and the load 12. Can be detected accurately. Therefore, the charging / discharging of each of the first to fifth interconnection systems 17-1 to 17-5 can be appropriately switched quickly following the current flowing through the load 12, and the battery life can be further extended.
  • charging is performed at a specific time such as at night. And when there exists the electric water heater 19, the electric power feeding to this electric water heater 19 is also performed at night. Therefore, when charging is performed, the controller 16-1 of the master interconnection system 17-1 appropriately avoids the power supply time of the electric water heater 19 and connects within a range that does not exceed a predetermined current consumption value. Allocate the charging order of the system. At this time, it is also possible to charge a plurality of interconnected systems simultaneously within a range that does not exceed a predetermined current consumption value.
  • the control device 16-1 of the master interconnection system 17-1 can perform the number of times of charging, the total charging power amount, the total charging time via the signal line 18 during standby or the like. Collect the signals corresponding to the total discharge time, the average charge / discharge current, the number of discharge currents above the specified value, and the number of charge currents above the specified value, and set the schedule for the next charge / discharge.
  • the control devices 16-1 to 16-5 are formed in the respective interconnection systems 17-1 to 17-5, any one interconnection A system is selected as a master system, and charge / discharge of other interconnected systems is controlled by a controller of this master system.
  • a control device is incorporated in an interconnected system that has been generally used. Therefore, the power storage system according to the first embodiment can be easily applied to a power storage system using a plurality of conventionally used interconnected systems without preparing a separate special interconnected system. Can do.
  • the power storage system 10 can make the number of discharges of the interconnection systems 17-1 to 17-5 uniform.
  • the interconnection system that was not discharged and the interconnection system with a remaining capacity exceeding a predetermined specified capacity are not charged, so that the total charge power amount of each interconnection system can be made uniform. it can.
  • various charging / discharging conditions of the storage battery module in each interconnection system are leveled, and it can suppress that the lifetime of a specific storage battery module becomes short.
  • the disconnecting devices 15-1 to 15-5 open the storage battery modules 13-1 to 13-5 that are not charged / discharged and disconnect them from the power converters 14-1 to 14-5. You may do it.
  • the power converter normally boosts the DC power of the storage battery module to a predetermined voltage and outputs it to the AC / DC bidirectional converter and the DC output of the AC / DC bidirectional converter to the predetermined voltage
  • a step-up / step-down unit having a function of charging the storage battery module, a function of converting AC power from the system into DC power and outputting it to the step-up / step-down unit, and converting DC power from the step-up / down unit to AC power
  • an AC / DC bidirectional converter having a function of supplying power to the system. As shown in FIG.
  • the power storage system 10A of the second embodiment divides the function of the power converter into two, and the AC / DC bidirectional conversion unit 14a is replaced with the first to fifth interconnection systems 17- 1 to 17-5, and the step-up / step-down units 14b1 to 14b5 are integrated with the first to fifth interconnection systems 17-1 to 17-5, respectively.
  • the disconnecting device is not shown.
  • the power storage system 10A uses the first interconnection system 17-1 as a master interconnection system, and the first to fifth interconnection systems 17-1 by the master interconnection system control device 16-1.
  • the storage battery modules 13-1 to 13-5, the step-up / step-down units 14b1 to 14b5, and the common AC / DC bidirectional conversion unit 14a are controlled.
  • the power storage system 10A operates on substantially the same principle as the power storage system 10, but the configuration of the power conversion device can be simplified by using one AC / DC bidirectional conversion unit 14a in common. At the same time, the control of the power converter is simplified.
  • the power storage system 10B like the power storage system 10A, divides the function of the power conversion device into two parts, and the AC / DC bidirectional conversion unit 14a is connected to the first to fifth connected units.
  • the step-up / step-down units 14b1 to 14b5 are integrated with the first to fifth interconnected systems 17-1 to 17-5, respectively.
  • the disconnecting device is not shown.
  • one control device 16a is commonly used in the first to fifth interconnection systems 17-1 to 17-5.
  • the control device 16a controls the storage battery modules 13-1 to 13-5, the step-up / step-down units 14b1 to 14b5 and the common AC / DC bidirectional converter 14a of the first to fifth interconnection systems 17-1 to 17-5.
  • the power storage system 10B operates on substantially the same principle as the power storage system 10A. However, since one control device 16a is used in common, a single control device can be used for a plurality of interconnected systems. This makes it easier to control each interconnection system.
  • the power storage system 10C has a configuration in which a current detection circuit 23 is added to the power storage system 10 as shown in FIG.
  • the current detection circuit 23 is provided in the first interconnection system 17-1, detects the current value of the current output from the detection means 22, and outputs the detection result to the first to fifth interconnection systems 17-1 to 17-1. It is transmitted to the control devices 16-1 to 16-5 of 17-5.
  • the control devices 16-1 to 16-5 appropriately control charging / discharging of the interconnection system in consideration of the transmitted current value.
  • Other configurations are substantially the same as those of the power storage system of the first embodiment.
  • the control devices 16-1 to 16-5 can accurately detect the power flowing through the load 12 based on the current value flowing between the system 11 and the load 12. With the above configuration, the control devices 16-1 to 16-5 can appropriately and quickly switch charging / discharging of the first to fifth interconnection systems 17-1 to 17-5 following the current flowing through the load 12. Battery life can be further increased.
  • any one of the first to fifth interconnection systems 17-1 to 17-5 is determined as a master interconnection system.
  • the first interconnection system 17-1 will be described as a master interconnection system, and the other four interconnection systems will be described as slave interconnection systems.
  • the control device 16-1 of the first interconnection system 17-1 which is a master interconnection system, collects signals relating to past charge / discharge states of the storage battery module 13-1. Further, the control device 16-1 passes through the signal line 18 from the control devices 16-2 to 16-5 of the second to fifth interconnection systems 17-2 to 17-5 which are slave interconnection systems. Signals relating to past charge / discharge states of the respective storage battery modules 13-2 to 13-5 are collected. Based on the collected signals relating to the past charge / discharge states, the control device 16-1 designs and executes charge / discharge schedules of the first to fifth interconnected systems 17-1 to 17-5. Each of the control devices 16-2 to 16-5 is controlled by the master control device 16-1.
  • the master control device 16-1 includes a first control unit and a second control unit (not shown). As shown in FIG. 8 and FIG. 9, the first control unit is more than the nominal terminal voltage V2 in the fully charged state of the storage battery modules 13-1 to 13-5 of the interconnection systems 17-1 to 17-5. A small predetermined voltage V1 is set. The predetermined voltage V1 is a voltage when shifting from constant current charging to constant voltage charging. The first control unit shifts to constant voltage charging when the terminal voltage Vb of the storage battery modules 13-1 to 13-5 at the time of constant current charging with the current I1 reaches the predetermined voltage V1.
  • the predetermined voltage V1 is appropriately set within a range of about 70 to about 90% of the nominal terminal voltage V2 in a fully charged state of the storage battery modules 13-1 to 13-5, for example. If the predetermined voltage V1 is too small, the time required for charging will be long. If it is too large, the time required for charging will be short. However, since the possibility of overvoltage increases, the past of each storage battery module 13-1 to 13-5 It may be set appropriately taking into account the state of charge and discharge. The charging voltage during constant voltage charging is made approximately equal to the nominal terminal voltage V2 in the fully charged state.
  • the second control unit controls the timing for starting charging the storage battery modules 13-1 to 13-5 in order.
  • the second control unit reduces the charging current Ic of the storage battery module below the set value I3.
  • the storage battery module to be charged next is started by the first control unit with constant current charging at the current value I1.
  • the control by the second control unit is sequentially performed on each of the storage battery modules 13-1 to 13-5.
  • the set value I3 of the charging current Ic of the storage battery module is appropriately set to a value larger than 1/50 to 1/20 of I1, which is the charging current value I2 when regarded as the fully charged state of the conventional example, for example, several times.
  • the charging of the storage battery module that performs charging next by comparing the terminal voltage Vb with the set voltage instead of the charging current Ic. May start.
  • the set voltage is a voltage corresponding to the current set value I3.
  • the storage battery module which shifted to constant voltage charge is the same as in the case of the conventional constant voltage charge, when the charge current value I2 when considered to be a full charge state, for example, 1/50 to 1/20 of I1 is reached. Stopped.
  • the master control device 16-1 uses the storage battery modules 13-1 to 13-5 of the interconnection systems 17-1 to 17-5 according to the number of times of charging (or the number of times of discharging), as in the case of the first embodiment.
  • a ranking of 13-5 is performed, and the order and number of charging are determined.
  • the change of the amount of charging power when charging the storage battery module of one interconnection system is as shown in FIG. 5A.
  • the electric water heater 19 is in operation, the current consumption of the electric water heater 19 is large, so charging is not performed, and after the operation of the electric water heater 19 is stopped, the current value is first determined for a predetermined interconnected system.
  • the storage battery module of the preceding interconnected system is first charged with a constant current at a current value I1, and the terminal voltage When Vb reaches a predetermined voltage V1, the constant current charging is shifted to the constant voltage charging. Thereafter, when the charging current Ic of the storage battery module reaches the set value I3 or the terminal voltage V2 corresponding to the set value I3, the storage battery module of the next interconnection system is immediately charged with a constant current I1.
  • the change in the charging current amount in this case is as shown in FIG. 5B. If such a charge form is adopted, the chargeable time can be used effectively, and charging can be completed in a short time.
  • Such charge control is performed by the master control device 16-1, as described above. This is done by determining the set value I3 so that the relationship is set value I3 + current value I1 ⁇ current value at which the breaker flies. When the breaker flies, charging is forcibly terminated.
  • the amount of electric power is reduced, and the electric power consumption is substantially due to constant current charging of the other storage battery module.
  • the charging power amount is reduced to an extremely low value. Also in this case, charging can be completed in a short time.
  • the master control device 16-1 When the discharge is performed after the charging is completed, the master control device 16-1 appropriately designs and executes a discharge schedule in the same manner as in the first embodiment.
  • the signal related to the past charge / discharge state is the same as that in the first embodiment.
  • control devices 16-1 to 16-5 are formed in the interconnection systems 17-1 to 17-5 constituting the power storage system 10 of the first embodiment.
  • present invention can be similarly applied to the power storage systems 10A to 10C as in the second to fourth embodiments.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

L'invention concerne un système de stockage d'énergie (10) dans lequel des dispositifs de commande (16-1 à 16-5) classent des systèmes de connexion (17-1 à 17-5) sur la base d'au moins soit la fréquence passée de décharge soit la fréquence de charge de modules de batteries de stockage des systèmes de connexion (17-1 à 17-5). Les dispositifs de commande (16-1 à 16-5) agissent de manière que, lors du déchargement, les systèmes de connexion se déchargent dans l'ordre en commençant par le système de connexion ayant la plus petite fréquence de décharge parmi les systèmes de connexion chargés, et lors de la charge, les systèmes de connexion se chargent dans l'ordre en commençant par le système de connexion ayant la plus petite fréquence de charge parmi les systèmes de connexion pour lesquels il est déterminé qu'une charge est nécessaire, jusqu'à ce que chaque système de connexion atteigne une capacité de charge cible. Ainsi, dans les systèmes de stockage d'énergie de la présente invention qui connectent une pluralité de systèmes de connexion, entre autres des modules de batteries de stockage et des dispositifs de conversion d'énergie, on peut niveler la fréquence de charge et la fréquence de décharge de chaque système de stockage d'énergie.
PCT/JP2012/057021 2011-03-18 2012-03-19 Système de stockage d'énergie WO2012128252A1 (fr)

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JP2015126541A (ja) * 2013-12-25 2015-07-06 トヨタ自動車株式会社 電源制御装置
CN104953198A (zh) * 2014-03-26 2015-09-30 苏州宝时得电动工具有限公司 电池包组的控制方法、电池包组及电动工具
CN105281379A (zh) * 2014-06-06 2016-01-27 天硕电网科技股份有限公司 二次电池的充电供电方法及充电设备
KR20160020714A (ko) * 2014-08-14 2016-02-24 엘지전자 주식회사 에너지 저장장치 및 이를 구비하는 에너지 저장 시스템
JP5905118B2 (ja) * 2012-11-19 2016-04-20 株式会社日立製作所 蓄電池制御装置及び蓄電地制御方法
CN109301920A (zh) * 2018-10-10 2019-02-01 北京凯华网联新能源技术有限公司 基于菊花链总线的智能多路混用电池管理器、控制方法及其应用
CN109756018A (zh) * 2017-11-02 2019-05-14 光宝电子(广州)有限公司 电池充电装置及电池充电方法
WO2019163181A1 (fr) * 2018-02-20 2019-08-29 株式会社日立製作所 Système de stockage d'énergie
CN110544966A (zh) * 2019-07-25 2019-12-06 宁波三星智能电气有限公司 一种基于链表的充电桩自动功率分配方法
CN110679054A (zh) * 2017-06-02 2020-01-10 松下知识产权经营株式会社 蓄电系统
CN111937269A (zh) * 2018-03-26 2020-11-13 古河电气工业株式会社 蓄电系统以及充电控制方法

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JP5905118B2 (ja) * 2012-11-19 2016-04-20 株式会社日立製作所 蓄電池制御装置及び蓄電地制御方法
JPWO2014076832A1 (ja) * 2012-11-19 2017-01-05 株式会社日立製作所 蓄電池制御装置及び蓄電地制御方法
KR20150029935A (ko) * 2013-09-11 2015-03-19 엘지전자 주식회사 에너지 저장장치, 및 이를 구비하는 전력 공급 시스템
KR102068177B1 (ko) * 2013-09-11 2020-01-20 엘지전자 주식회사 에너지 저장장치, 및 이를 구비하는 전력 공급 시스템
JP2015126541A (ja) * 2013-12-25 2015-07-06 トヨタ自動車株式会社 電源制御装置
CN104953198A (zh) * 2014-03-26 2015-09-30 苏州宝时得电动工具有限公司 电池包组的控制方法、电池包组及电动工具
CN105281379A (zh) * 2014-06-06 2016-01-27 天硕电网科技股份有限公司 二次电池的充电供电方法及充电设备
KR20160020714A (ko) * 2014-08-14 2016-02-24 엘지전자 주식회사 에너지 저장장치 및 이를 구비하는 에너지 저장 시스템
JP2016042782A (ja) * 2014-08-14 2016-03-31 エルジー エレクトロニクス インコーポレイティド エネルギー貯蔵装置及びそれを備えるエネルギー貯蔵システム
KR102270104B1 (ko) 2014-08-14 2021-06-25 엘지전자 주식회사 에너지 저장장치 및 이를 구비하는 에너지 저장 시스템
CN110679054A (zh) * 2017-06-02 2020-01-10 松下知识产权经营株式会社 蓄电系统
CN109756018A (zh) * 2017-11-02 2019-05-14 光宝电子(广州)有限公司 电池充电装置及电池充电方法
WO2019163181A1 (fr) * 2018-02-20 2019-08-29 株式会社日立製作所 Système de stockage d'énergie
CN111937269A (zh) * 2018-03-26 2020-11-13 古河电气工业株式会社 蓄电系统以及充电控制方法
CN109301920A (zh) * 2018-10-10 2019-02-01 北京凯华网联新能源技术有限公司 基于菊花链总线的智能多路混用电池管理器、控制方法及其应用
CN109301920B (zh) * 2018-10-10 2023-08-29 北京凯华网联新能源技术有限公司 基于菊花链总线的智能多路混用电池管理器、控制方法
CN110544966A (zh) * 2019-07-25 2019-12-06 宁波三星智能电气有限公司 一种基于链表的充电桩自动功率分配方法

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