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Battery charging device and method

  • US 9,337,684 B2
  • Filed: 05/06/2009
  • Issued: 05/10/2016
  • Est. Priority Date: 05/06/2008
  • Status: Active Grant
First Claim
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1. A method of charging a lead-acid battery utilizing a charging device comprising:

  • providing the lead-acid battery with a first substantially constant current of approximately 30.0 amps;

    determining if a voltage of the lead-acid battery reaches approximately 15.6 volts;

    terminating application of the first current if the lead-acid battery is not less than 15.6 volts, and not later than approximately 3.0 hours have elapsed;

    providing the lead-acid battery with a first substantially constant voltage of approximately 14.8 volts at an initial current of no more than approximately 30.0 amps;

    determining if the current of the lead-acid battery is greater than approximately 1.0 amps;

    terminating application of the first voltage if the current of the lead-acid battery is not greater than 1.0 amps, and not later than approximately 4.0 hours have elapsed;

    providing the lead-acid battery with a second substantially constant current of approximately 3.0 amps;

    determining if the voltage of the lead-acid battery reaches approximately 17.5 volts;

    terminating application of the second current if the lead-acid battery is not less than 17.5 volts, and not later than approximately 1.0 hours have elapsed; and

    providing the lead-acid battery with a second substantially constant voltage of approximately 13.8 volts at a current of no more than approximately 1.0 amps.

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