×

Battery charger charging time control

  • US 5,747,970 A
  • Filed: 09/24/1996
  • Issued: 05/05/1998
  • Est. Priority Date: 09/24/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A circuit for charging a battery, comprising:

  • a temperature signal input for inputting a temperature signal indicative of a temperature of the battery;

    a switch having an input to couple to a power source and an output for coupling to the battery, the switch to selectively supply power to the output under control of a control signal; and

    a controller coupled to the temperature signal input and to the switch to generate the control signal, the controller calculating a rate of change of the temperature signal and storing a peak rate of change value during a battery charging interval, the controller to generate the control signal to control the switch to disable charging of the battery when the rate of change drops below the peak rate of change value by a temperature rate of change threshold amount.

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