×

Combination battery charger and battery driven power supply

  • US 6,133,711 A
  • Filed: 03/16/1998
  • Issued: 10/17/2000
  • Est. Priority Date: 03/26/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A charging device for charging a secondary battery, comprising:

  • charging means for performing a charging action on the secondary battery;

    power supplying means for supplying power to a load device connected to said charging device;

    mode change-over means for selecting between a charge mode in which the charging action on the secondary battery is performed and a discharge mode in which power is supplied to the load device; and

    control means for, when the charge mode is selected by said mode change-over means, causing said charging means to perform the charging action on the secondary battery and for, when the discharge mode is selected by said mode change-over means, causing said power supplying means to supply power from said secondary battery to the load device in a state in which the secondary battery is mounted on said charging device,said charging device further comprising dropped-voltage state detecting means for detecting a dropped-voltage state of the secondary battery, wherein said control means allows a mode to be set as selected by said mode change-over means when the secondary battery is decided to be not in the dropped-voltage state by said dropped-voltage state detecting means, and causes said charging means to perform the charging action on the secondary battery irrespectively of a state of said mode change-over means when the secondary battery is decided to be in the dropped-voltage state by said dropped-voltage state detecting means.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×