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Method and system for battery charging

  • US 5,696,436 A
  • Filed: 10/27/1995
  • Issued: 12/09/1997
  • Est. Priority Date: 10/27/1995
  • Status: Expired due to Term
First Claim
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1. A method for controlling battery charging comprising the steps of:

  • applying a predetermined voltage to a battery to be charged;

    increasing the voltage applied to the battery to a known maximum battery charging voltage;

    measuring a current supplied to the battery at the maximum battery charging voltage;

    supplying a predetermined set of constant current charging levels to be stored in a memory of the battery;

    setting a charging current level approximately equal to one of the set of predetermined constant current charging levels based on the current supplied to the battery at the maximum battery charging voltage for minimizing an amount of time needed to charge the battery and maximizing a useful life of the battery; and

    charging the battery at one of a highest constant current charging level not exceeding the maximum charging voltage or the maximum power level not exceeding the maximum charging voltage, whichever supplies the greatest amount of current.

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