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Battery balancing including resonant frequency compensation

  • US 7,592,775 B2
  • Filed: 05/31/2006
  • Issued: 09/22/2009
  • Est. Priority Date: 05/31/2006
  • Status: Active Grant
First Claim
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1. A device, comprising:

  • a plurality of balancing circuits, coupled to each of a plurality of coupled battery cells, that conduct current to and from the plurality of coupled battery cells;

    a share bus, coupled to at least each of the plurality of balancing circuits; and

    a phase locked loop controller, coupled to at least the share bus and the plurality of balancing circuits, that controls a driving frequency for the plurality of balancing circuits by detecting an overall resonant frequency of the plurality of balancing circuits through the share bus and adjusting the driving frequency produced by the phase locked loop controller to match the overall resonant frequency.

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