×

Method and apparatus for controlling selection of batteries

  • US 5,270,946 A
  • Filed: 07/02/1992
  • Issued: 12/14/1993
  • Est. Priority Date: 03/30/1988
  • Status: Expired due to Fees
First Claim
Patent Images

1. An apparatus for supplying power to a device, the apparatus comprising:

  • a plurality of batteries, each battery having a terminal;

    detecting means for detecting voltages of the batteries;

    means for selecting a first battery from the plurality of batteries when a detected voltage in the first battery is larger than a predetermined voltage, to supply power from the first battery to the device while conducting a positive current through the terminal of the first battery;

    means for selecting a second battery from the plurality of batteries when the detected voltage in the first battery is less than the predetermined voltage, to supply power from the second battery to the device, and for isolating the first battery from the device while conducting a current no less than zero through the terminal of the first battery;

    means for reselecting the first battery when the detected voltage in the second battery is less than the predetermined voltage; and

    signaling means for signaling a power condition of the first battery when the detected voltage in the first battery is less than the predetermined voltage.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×