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Energy storage apparatus having a power processing unit

  • US 7,436,150 B2
  • Filed: 04/04/2005
  • Issued: 10/14/2008
  • Est. Priority Date: 04/04/2005
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • a. an energy storage device configured to deliver electrical energy to a load, and configured to receive electrical energy from a source;

    b. a power processing unit coupled to the energy storage device and comprising a first terminal and a second terminal; and

    c. an energy management unit coupled to the energy storage device;

    d. wherein the power processing unit is configured to regulate a voltage that corresponds to the voltage measured across the first and second terminals, the voltage being regulated to be at approximately a prescribed value despite a fluctuation in voltage across the energy storage device while electrical energy is received by the energy storage device, or while electrical energy is delivered from the energy storage device to the load; and

    e. wherein the energy management unit comprises a balancing element coupled in parallel to the energy storage device for controlling the rate at which the energy storage device delivers and receives electrical energy.

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