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Storage battery system

  • US 10,014,698 B2
  • Filed: 09/19/2013
  • Issued: 07/03/2018
  • Est. Priority Date: 09/19/2013
  • Status: Active Grant
First Claim
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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:

  • 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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