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Systems and methods for scalable configurations of intelligent energy storage packs

  • US 8,686,693 B2
  • Filed: 03/02/2010
  • Issued: 04/01/2014
  • Est. Priority Date: 03/02/2009
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • providing independent current measurements of a plurality of energy storage cells electrically connected to a plurality of respective converter circuits from a plurality of respective control circuits, wherein the respective converter circuits transform respective input voltages from the plurality of respective energy storage cells to respective desired output bus contribution voltages, wherein a summation of the respective desired output bus contribution voltages equals a total desired bus voltage, and wherein the plurality of energy storage cells are part of a multi-cell storage pack;

    providing independent voltage measurements of the plurality of energy storage cells; and

    receiving first control signals for a first energy storage cell of the plurality of energy storage cells, wherein the first control signals are determined according to a load policy, wherein the load policy is based on estimation of cell lifetime of the first energy storage cell relative to estimation of cell lifetimes of other energy storage cells of the plurality of energy storage cells, and wherein a first converter circuit from a first control circuit transforms a first input voltage from the first energy storage cell to a desired first output bus contribution voltage according to the first control signals.

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