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Method and apparatus for charging batteries

  • US 8,729,868 B2
  • Filed: 06/19/2008
  • Issued: 05/20/2014
  • Est. Priority Date: 07/27/2007
  • Status: Active Grant
First Claim
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1. A battery charging system comprising:

  • a battery charger;

    a DC power supply;

    a load coupled to said DC power supply;

    a first switch coupled between said DC power supply and said battery charger coupled to a rechargeable battery to be recharged;

    a second switch coupled between said DC power supply and said rechargeable battery; and

    a control circuit for selectively switching between a first charging mode by closing said first switch and opening said second switch, during which said battery charger charges said rechargeable battery while said DC power supply supplies electric power to said battery charger and to said load, and a second charging mode by opening said first switch and closing said second switch, during which said DC power supply charges said rechargeable battery while supplying electric power to said load.

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