Storage battery system
First Claim
1. A storage battery system connected to a power system and operative based on a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising:
- a storage battery including a plurality of cells connected in series;
battery management circuitry configured to continuously monitor a state of the storage battery;
power conditioning circuitry configured toconvert AC power of the power system into DC power;
charge the storage battery with the DC power;
convert DC power of the storage battery into AC power; and
discharge the AC power to the power system; and
a controller configured toreceive the charge/discharge request and storage battery information supplied from the battery management circuitry; and
control the power conditioning circuitry based on the charge/discharge request and the storage battery information, whereinthe controller is configured toreceive the storage battery information and execute control to output a charge/discharge command to the power conditioning circuitry so that an average voltage of the plurality of cells is maintained within a range of a holding voltage that suppresses deterioration of the storage battery; and
stop the executing the control when a voltage of any one of the plurality of cells included in the storage battery information is out of an allowable voltage range including the holding voltage range.
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Accused Products
Abstract
A storage battery system connected to a power system and operative based on a charge/discharge request from an EMS includes: a battery management unit configured to monitor a state of a storage battery including plural cells; a power conditioning system; a controller configured to receive the charge/discharge request and storage battery information from the battery management unit and control the power conditioning system based thereon; a sleep controller configured to receive the storage battery information and execute sleep control to output a charge/discharge command to the power conditioning system so that an average voltage of plural cells is maintained within a voltage range that suppresses deterioration of the storage battery. The sleep controller includes a sleep control stop function stopping the sleep control when a voltage of any of the plural cells in the storage battery information is out of an allowable voltage range including the holding voltage range.
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Citations
7 Claims
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1. A storage battery system connected to a power system and operative based on a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising:
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a storage battery including a plurality of cells connected in series; battery management circuitry configured to continuously monitor a state of the storage battery; power conditioning circuitry configured to convert AC power of the power system into DC power; charge the storage battery with the DC power; convert DC power of the storage battery into AC power; and discharge the AC power to the power system; and a controller configured to receive the charge/discharge request and storage battery information supplied from the battery management circuitry; and control the power conditioning circuitry based on the charge/discharge request and the storage battery information, wherein the controller is configured to receive the storage battery information and execute control to output a charge/discharge command to the power conditioning circuitry so that an average voltage of the plurality of cells is maintained within a range of a holding voltage that suppresses deterioration of the storage battery; and stop the executing the control when a voltage of any one of the plurality of cells included in the storage battery information is out of an allowable voltage range including the holding voltage range. - View Dependent Claims (2, 3, 4, 5)
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6. A storage battery system connected to a power system and operative based on a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising:
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a storage battery including a plurality of cells connected in series; battery management circuitry configured to continuously monitor a state of the storage battery; power conditioning circuitry configured to convert AC power of the power system into DC power; charge the storage battery with the DC power; convert DC power of the storage battery into AC power; and discharge the AC power to the power system; and a controller configured to receive the charge/discharge request and storage battery information supplied from the battery management circuitry; and control the power conditioning circuitry based on the charge/discharge request and the storage battery information, wherein the controller is configured to receive the storage battery information and execute control to output a charge/discharge command to the power conditioning circuitry so that an average voltage of the plurality of cells is maintained within a range of a holding voltage that suppresses deterioration of the storage battery; stop executing the controlling when a voltage of any one of the plurality of cells included in the storage battery information is out of an allowable voltage range including the holding voltage range; and perform interlock processing upon detection of abnormality of the storage battery system based on the storage battery information, the interlock processing corresponding to a content of the detected abnormality.
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7. A storage battery system connected to a power system and operative based on a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising:
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a storage battery including a plurality of cells connected in series; battery management circuitry configured to continuously monitor a state of the storage battery; power conditioning circuitry configured to convert AC power of the power system into DC power; charge the storage battery with the DC power; convert DC power of the storage battery into AC power; and discharge the AC power to the power system; and a controller configured to receive the charge/discharge request and storage battery information supplied from the battery management circuitry; and control the power conditioning circuitry based on the charge/discharge request and the storage battery information, wherein the controller is configured to receive the storage battery information and execute control to output a charge/discharge command to the power conditioning circuitry so that an average voltage of the plurality of cells is maintained within a range of a holding voltage that suppresses deterioration of the storage battery; stop executing the controlling when a voltage of any one of the plurality of cells included in the storage battery information is out of an allowable voltage range including the holding voltage range; and prestore a utilization schedule of the storage battery system utilized by the power system and execute the controlling based on the schedule.
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Specification