STORAGE BATTERY SYSTEM AND METHOD OF CONTROLLING THE SAME
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Accused Products
Abstract
A storage battery system includes: electric storage units; and DC-DC converters each provided between one of the electric storage units and a DC bus. Each of the DC-DC converters includes: a voltage sensor for detecting a voltage value at a connection point between the DC bus and the DC-DC converter; a second obtainment unit which obtains voltage values detected by the voltage sensors of the other DC-DC converters; and a control unit which, when a difference value between a statistic of the voltage values obtained by the second obtainment unit and the voltage value detected by the voltage sensor is not less than a predetermined threshold value, changes the voltage value detected by the voltage sensor, and controls an amount of charge in and an amount of discharge from a corresponding one of the electric storage units to approximate the changed voltage value to a predetermined target value.
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Citations
20 Claims
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1-10. -10. (canceled)
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11. A storage battery system comprising:
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electric storage units connected with a common direct current (DC) bus in parallel, and each including at least one storage battery; and voltage conversion units, each provided between one of the electric storage units and the DC bus, for controlling amounts of charge in and amounts of discharge from the electric storage units, wherein each of the voltage conversion units includes; a voltage sensor for detecting a voltage value at a connection point between the DC bus and the voltage conversion unit; a communication unit configured to communicate with the other voltage conversion units; an obtainment unit configured to obtain, via the communication unit, voltage values detected by the voltage sensors of the other voltage conversion units; and a control unit configured to, when a difference value between (i) a statistic of the voltage values obtained by the obtainment unit and (ii) the voltage value detected by the voltage sensor is not less than a predetermined threshold value, approximate the voltage value detected by the voltage sensor to a predetermined target value by changing an amount of charge in and an amount of discharge from a corresponding one of the electric storage units. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method of controlling a storage battery system including electric storage units connected with a common direct current (DC) bus in parallel, and each including at least one storage battery;
- and voltage conversion units, each provided between one of the electric storage units and the DC bus, for controlling amounts of charge in and amounts of discharge from the electric storage units, the method comprising;
detecting a voltage value at a connection point between the DC bus and each of the voltage conversion units by a voltage sensor of the voltage conversion unit; obtaining voltage values detected by voltage sensors of the other voltage conversion units; and when a difference value between (i) a statistic of the voltage values detected in the obtaining and (ii) the voltage value detected in the detecting is not less than a predetermined threshold value, approximating the voltage value detected by the voltage sensor to a predetermined target value by changing an amount of charge in and an amount of discharge from a corresponding one of the electric storage units.
- and voltage conversion units, each provided between one of the electric storage units and the DC bus, for controlling amounts of charge in and amounts of discharge from the electric storage units, the method comprising;
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19. A storage battery system comprising:
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electric storage units connected with a common direct current (DC) bus in parallel, and each including at least one storage battery; voltage conversion units, each provided between one of the electric storage units and the DC bus, for controlling amounts of charge in and amounts of discharge from the electric storage units; voltage sensors each of which detects a voltage value at a connection point between the DC bus and one of the voltage conversion units; and a control unit configured to control each of the voltage conversion units, wherein when a difference value between (i) a voltage value detected by the voltage sensor corresponding to a particular voltage conversion unit and (ii) a statistic of voltage values detected by the voltage sensors corresponding to the voltage conversion units other than the particular voltage conversion unit is not less than a predetermined threshold value, the control unit is configured to approximate the voltage value detected by the voltage sensor corresponding to the particular voltage conversion unit to a predetermined target value by controlling each of the voltage conversion units.
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20. A method of controlling a storage battery system including electric storage units connected with a common direct current (DC) bus in parallel, and each including at least one storage battery;
- and voltage conversion units, each provided between one of the electric storage units and the DC bus, for controlling amounts of charge in and amounts of discharge from the electric storage units, the method comprising;
detecting a voltage value at a connection point between the DC bus and each of the voltage conversion units by a voltage sensor of the voltage conversion unit; and when a difference value between (i) a voltage value detected by the voltage sensor corresponding to a particular voltage conversion unit and (ii) a statistic of voltage values detected by the voltage sensors corresponding to the voltage conversion units other than the particular voltage conversion unit is not less than a predetermined threshold value, approximating the voltage value detected by the voltage sensor corresponding to the particular voltage conversion unit to a predetermined target value by controlling each of the voltage conversion units.
- and voltage conversion units, each provided between one of the electric storage units and the DC bus, for controlling amounts of charge in and amounts of discharge from the electric storage units, the method comprising;
Specification