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SYSTEM AND METHOD FOR OPTIMIZING ENERGY STORAGE DEVICE CYCLE LIFE

  • US 20130038127A1
  • Filed: 08/12/2011
  • Published: 02/14/2013
  • Est. Priority Date: 08/12/2011
  • Status: Active Grant
First Claim
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1. A multi-energy storage device system comprising:

  • a first energy storage device coupled to a direct current (DC) link;

    a load coupled to the DC link and configured to receive energy from the DC link;

    a bi-directional buck/boost converter assembly comprising a first bi-directional buck/boost converter, the first bi-directional buck/boost converter comprising an output channel coupled to the DC link and comprising a first input channel;

    a second energy storage device coupled to the first input channel of the first bi-directional buck/boost converter via a first DC bus, the second energy storage device having a usable energy storage range defining an entire amount of usable energy storable in second energy storage device;

    a database comprising stored information related to a known acceleration event in which a supply of energy to the load is desired; and

    a system controller configured to;

    acquire the stored information related to the known acceleration event; and

    during the known acceleration event, cause the first bi-directional buck/boost converter to boost the voltage of the second energy storage device and to supply the boosted voltage to the DC link to power the load such that after the known acceleration event, the state of charge of the second energy storage device is less than or substantially equal to a minimum usable energy storage state of charge.

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