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Electric charge/discharge control device and electric charge/discharge control method in a system using the same device

  • US 5,705,910 A
  • Filed: 08/28/1995
  • Issued: 01/06/1998
  • Est. Priority Date: 02/15/1995
  • Status: Expired due to Term
First Claim
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1. A charge/discharge control device which is connected to terminal equipment which has a secondary cell, to which a drive power is given from said secondary cell, and electrically charges and discharges said secondary cell, comprising:

  • a voltage measuring means for measuring the voltage of said secondary cell;

    a discharging means for discharging the voltage of said secondary cell; and

    a charging means for charging said secondary cell,wherein the voltage of said secondary cell is measured by said voltage measuring means prior to charging said secondary cell, wherein when the voltage of said secondary cell is larger than a predetermined voltage, said secondary cell is discharged by said discharging means and is then charged by said charging means, and wherein when the voltage of said secondary cell is smaller than the predetermined voltage, said secondary cell is charged by said charging means without being discharged by said discharging means.

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