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Parallel hybrid battery pack charging

  • US 7,518,338 B2
  • Filed: 04/13/2006
  • Issued: 04/14/2009
  • Est. Priority Date: 04/13/2006
  • Status: Active Grant
First Claim
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1. A charge circuit for a hybrid battery pack, the charge circuit comprising:

  • a first switch operable to provide a charge to a first cell stack of the hybrid battery pack;

    a first charge switch coupled in parallel with the first switch;

    a second switch operable to provide the charge to a second cell stack of the hybrid battery pack, wherein the first cell stack and the second cell stack are coupled in parallel;

    a second charge switch coupled in parallel with the second switch; and

    a controller to control each one of the first switch and the second switch in accordance with a parallel charging sequence for the first cell stack and the second cell stack, wherein the parallel charging sequence includes providing the charge to the first cell and to the second cell in parallel during a pre-charge phase and during a trickle-charge phase.

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