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Battery charger capable of charging a variety of batteries with varying cell numbers

  • US 5,973,480 A
  • Filed: 09/15/1997
  • Issued: 10/26/1999
  • Est. Priority Date: 09/13/1996
  • Status: Expired due to Term
First Claim
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1. A battery charger comprising:

  • a battery voltage detector for detecting a voltage of a battery being charged and outputting a first battery voltage signal indicative of the voltage of the battery;

    a battery voltage converter for converting the first battery voltage signal to a second battery voltage that changes within a predetermined range corresponding to a variable range of the voltage of the battery being charged, the second battery voltage being in a form of an analog signal;

    an analog-to-digital converter for converting the second battery voltage to a digital value; and

    a full charge detector for detecting, based on the digital value, that the battery has reached a fully charged condition.

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