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High-efficiency battery equalization for charging and discharging

  • US 9,564,763 B2
  • Filed: 10/19/2015
  • Issued: 02/07/2017
  • Est. Priority Date: 08/28/2009
  • Status: Active Grant
First Claim
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1. A method for charging a battery of cells, comprising:

  • determining a voltage of each of a plurality of cells in the battery;

    selecting a subset of the plurality of cells based at least in part on the determined voltages, the subset comprising the N least charged cells, wherein a sum of operating voltages of the N cells is at most equal to a charging voltage;

    creating a series connection of cells that includes the subset of the plurality of cells, the series connection of cells excluding at least one cell that requires charging; and

    charging the series connection of cells with the charging voltage.

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