×

Apparatus for controlling charging of a storage battery

  • US 5,175,485 A
  • Filed: 09/19/1991
  • Issued: 12/29/1992
  • Est. Priority Date: 09/19/1990
  • Status: Expired due to Fees
First Claim
Patent Images

1. An apparatus for controlling charging of a storage battery comprising:

  • power supply means for operating initially in a constant current charging mode and then operating in a constant voltage charging mode in response to a charging mode switch-over signal, said storage battery being charged sequentially with a constant current and then a constant voltage from said power supply means;

    charged voltage state detecting means for checking a charging state of said storage battery to output said charging mode switch-over signal to said power supply means, for switching-over from the constant current charging mode to the constant voltage charging mode, when the charged voltage reaches a predetermined constant value;

    switching means for receiving, in response to said output signal from said charged voltage state detecting means, the voltage being applied to said storage battery and dividing the received voltage at different predetermined rates to output a plurality of signals; and

    current variation detecting means for receiving one output signal from said switching means as a reference signal and designating the time when the output signal begins to increase as a charging completion point of time to output a desired signal level of a power-off signal to said power supply means indicating completion of the charging of said storage battery.

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