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Battery equalization using a plug-in charger in a hybrid electric vehicle

  • US 8,314,595 B2
  • Filed: 06/09/2009
  • Issued: 11/20/2012
  • Est. Priority Date: 01/12/2007
  • Status: Active Grant
First Claim
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1. In a hybrid electric vehicle that includes an engine, motor- generator, and energy storage device, a power supply system accessible to an AC electric power source external to the vehicle, the system comprising:

  • a charger coupled to said electric power source and the energy storage device for supplying DC electric power to the energy storage device from said electric power source; and

    a controller configured to use a state of charge of the energy storage device and a base electric power profile having regions including a fast active discharge region, a increasing active discharge region, an opportunistic passive region, an increasing active charge and a fast active charge region relating electric power and said state of charge, and to use the motor-generator and internal combustion engine to provide a bulk charge to the energy storage device in accordance with the base electric profile and a current state of charge.

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