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Battery charging system

  • US 4,052,656 A
  • Filed: 08/14/1975
  • Issued: 10/04/1977
  • Est. Priority Date: 04/22/1974
  • Status: Expired due to Term
First Claim
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1. A method of charging a battery comprising the steps of:

  • sensing the charging current and terminal voltage of the battery, charging said battery with a relatively high and substantially constant current during a high current stage until said terminal voltage rises relatively rapidly indicating a transition phase;

    tapering the charging current from the relatively high value to a pedetermined finishing current in a taper current stage, said tapering being at a rate which causes continual rise in said terminal voltage of said battery during said tapering;

    monitoring the total charge delivered to said battery during said high and taper current stages;

    further charging said battery with said finishing current for a time period based upon said total charge and thereafter terminating said charging of said battery.

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