Secondary battery power storage system
First Claim
1. A secondary battery storage system for connection to a power system, the storage system comprising:
- a secondary battery connected to a secondary battery load;
a detecting device for detecting a residual electric power of said secondary battery;
a connection unit connected to the power system and to said secondary battery;
a control unit connected to said connection unit; and
a signal line for transmitting information about said secondary battery through said detecting device to said control unit, wherein said control unit controls said connection unit on the basis of said information, wherein said information comprises measured values for determining a residual electric power stored in the secondary battery, wherein for discharging the residual electric power said connection unit selects either the secondary battery load or the power system depending on the residual electric power stored in the secondary battery.
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Abstract
The present invention provides a distributed secondary battery type power storage system capable of maintaining the soundness of the secondary battery and of efficient electric power charging and discharging operations. The secondary battery power storage system comprises a secondary battery connected to a load, a charge/discharge unit connectable to a power system and connected to the secondary battery, and a plurality of loads connected to the charge/discharge unit. A power receiving object is selected and a capacity is determined on the basis of information about the operating condition of the plurality of loads, and the surplus electric power remaining in the secondary battery after feeding electric power from the secondary battery to the load is fed to the selected power receiving object through the charge/discharge unit. The secondary battery power storage system is capable of maintaining the soundness of the secondary battery and of efficient charging and discharging operation.
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Citations
31 Claims
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1. A secondary battery storage system for connection to a power system, the storage system comprising:
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a secondary battery connected to a secondary battery load; a detecting device for detecting a residual electric power of said secondary battery; a connection unit connected to the power system and to said secondary battery; a control unit connected to said connection unit; and a signal line for transmitting information about said secondary battery through said detecting device to said control unit, wherein said control unit controls said connection unit on the basis of said information, wherein said information comprises measured values for determining a residual electric power stored in the secondary battery, wherein for discharging the residual electric power said connection unit selects either the secondary battery load or the power system depending on the residual electric power stored in the secondary battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A secondary battery storage system for connection to a power system, the storage system comprising:
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a secondary battery connected to a secondary battery load; a connection unit connected to the secondary battery, said connection unit connected to the power system and either a plurality of loads or a plurality of electric power storage units; a detecting device for detecting a residual electric power in the secondary battery; and a control unit for controlling the connection unit on the basis of information from the secondary battery and at least one of the loads of the plurality of loads or at least one of the units of the plurality of electric power storage units, wherein for discharging the residual electric power said connection unit selects at least a load of said plurality of loads or a unit of said plurality of electric power storage units depending on the residual electric power stored in the secondary battery, wherein a controller receives information from at least either the secondary battery or the plurality of loads and controls the connection unit;
a computer that measures the amount of electric power charged into and the amount of electric power discharged from the secondary battery, calculates the amount of residual electric power stored in the secondary battery, and comprises a memory for storing measured data of the secondary battery and arithmetic program information, and a controller for processing the information stored in the memory or information given thereto from external devices, and an analog-to-digital converter through which information provided by the external devices is given to the controller. - View Dependent Claims (12, 13, 14, 15)
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16. A secondary battery storage system for connection to a power system, the storage system comprising a connection unit connected to the power system, and connected to at least either a plurality of loads or a plurality of electric power storage units and having connecting means to connect the connection unit to a secondary battery;
- wherein the connection unit is controlled by a controller on the basis of information received from the plurality of loads or the plurality of electric power storage units, and wherein for discharging a residual electric power of said secondary battery said connection unit selects at least a load of said plurality of loads or a unit of said plurality of electric power storage units depending on the residual electric power stored in the secondary battery, further comprising an information transmitting means for interconnecting the controller and at least either the connecting means or the plurality of loads connected to the connection unit.
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17. A method of operating a secondary battery storage system for connection to a power system, the storage system comprising:
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a secondary battery connected to a secondary battery load; a detecting device for detecting a residual electric power of said secondary battery; a connection unit connected to the power system and to said secondary battery; a control unit connected to said connection unit; and a signal line for transmitting information about said secondary battery through said detecting device to said control unit; the method comprising; selecting the power system for discharging a residual electric power of the secondary battery through the connection unit after an electric power stored in the secondary battery is discharged to the secondary battery load, depending on the residual electric power stored in the secondary battery.
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18. A method of operating a secondary battery storage system for connection to a power system, the storage system comprising:
- a secondary battery connected to a secondary battery load, and a connection unit connected to the power system and connected to at least either a plurality of loads or a plurality of electric power storage units;
the method comprising;feeding surplus electric power from the secondary battery to at least either a load of the plurality of loads or a unit of the plurality of electric power storage units, depending on the residual electric power of the secondary battery, prior to charging said secondary battery with power from the power system. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
- a secondary battery connected to a secondary battery load, and a connection unit connected to the power system and connected to at least either a plurality of loads or a plurality of electric power storage units;
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31. A secondary battery storage system for connection to a power system, the storage system comprising:
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a secondary battery connected to a secondary battery load; a detecting device for detecting a residual electric power of said secondary battery; a connection unit connected to the power system and to said secondary battery; and a signal line for transmitting information about said secondary battery through said detecting device to said connection unit, wherein said connection unit controls charging and discharging of the secondary battery on the basis of said information, and wherein said information comprises measured values for determining residual electric power stored in the secondary battery, wherein for discharging the residual electric power said connection unit selects either the secondary battery load or the power system depending on the residual electric power stored in the secondary battery.
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Specification