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Energy storage device including a status indicator

  • US 7,439,711 B2
  • Filed: 09/27/2004
  • Issued: 10/21/2008
  • Est. Priority Date: 09/27/2004
  • Status: Active Grant
First Claim
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1. An energy storage device for use with an electric vehicle, the energy storage device comprising:

  • an electrical energy storage device including at least one ultracapacitor configured to be coupled to an electrical traction system of the electric vehicle to provide electrical power to the electrical traction system;

    a sensor integrally mounted within the electrical energy storage device and configured to measure a voltage of the ultracapacitor of the electrical energy storage device; and

    a status indicator integrally mounted to the electrical energy storage device and configured to provide a visual indication of the voltage.

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