×

Fast battery charger

  • US 5,493,199 A
  • Filed: 10/06/1992
  • Issued: 02/20/1996
  • Est. Priority Date: 06/07/1982
  • Status: Expired due to Term
First Claim
Patent Images

1. In a battery conditioning system,(a) rechargeable battery means for supplying operating current during portable operation so as to become progressively discharged as a result,(b) battery conditioning system means for coupling with said rechargeable battery means for supplying dynamic, charging current to said rechargeable battery means during at least a portion of a battery conditioning cycle, after a period of portable operation,(c) said battery conditioning system means comprising computer means having input means for receiving measures of battery and ambient temperature at intervals during such battery conditioning cycle, and(d) current control means for coupling with said rechargeable battery means for controlling the rate of current flow to the rechargeable battery means during a battery conditioning cycle,(e) said computer means having output means coupled with said current control means for varying the rate of current flow to said rechargeable battery means during a battery conditioning cycle as a function of battery temperature as monitored by said computer means without relying on measured battery voltage, including dynamically varying rate of current flow by successive relatively small incremental changes, as a function of battery temperature during said portion of the battery conditioning cycle to maximize efficiency of recharging,(f) wherein said computer means senses a differential between ambient temperature and battery temperature to insure that battery temperature rise will be essentially a function of an overcharge condition of the battery means as substantial current flow rates are supplied to the battery means during a battery conditioning cycle, the substantial current flow rates varying dynamically as a function of battery temperature.

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