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APPARATUS AND METHOD FOR CONTROLLING CHARGING AND DISCHARGING OF BATTERIES

  • US 20130076519A1
  • Filed: 05/29/2012
  • Published: 03/28/2013
  • Est. Priority Date: 09/27/2011
  • Status: Active Grant
First Claim
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1. A method being executed by a microprocessor of an apparatus for controlling charging and discharging of batteries in a battery unit that supplies power to power-driven equipment, the apparatus electrically connected to the battery unit, the power-driven equipment, and an energy conversion system, the method comprising:

  • (a) setting number requirements of batteries to be connected to a discharge unit and a charge unit of the battery unit, and setting a cut-off discharge voltage and a nominal voltage of each battery;

    (b) when the power-driven equipment is started, detecting an open-circuit voltage of each battery by a sensor connected to the battery;

    (c) establishing connections of the batteries with the discharge unit and the charge unit according to the open-circuit voltages of the batteries and the number requirements;

    (d) monitoring variations of the open-circuit voltages of the batteries during the discharge unit supplying power to the power-driven equipment and the energy conversion system charging the charge unit;

    (e) switching connections of one or more first batteries from the discharge unit to the charge unit, wherein a current open-circuit voltage of each first battery is lower than the cut-off discharge voltage of the first battery; and

    (f) switching connections of one or more second batteries from the charge unit to the discharge unit, wherein a current open-circuit voltage of each second battery equals the nominal voltage of the second battery.

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