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Control strategy for HV battery equalization charge during driving operation in fuel cell hybrid vehicles

  • US 8,148,952 B2
  • Filed: 07/14/2009
  • Issued: 04/03/2012
  • Est. Priority Date: 07/14/2009
  • Status: Active Grant
First Claim
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1. A method for equalizing the charge of battery cells in a battery in an electric vehicle, said method comprising:

  • monitoring the state of charge of the battery cells in the battery;

    measuring the actual current of the battery;

    determining a maximum charge current limit of the battery;

    comparing the actual battery current and the maximum charge current limit;

    modifying the maximum charge current limit based on the comparison between the actual battery current and the maximum charge current limit;

    converting the modified maximum charge current limit to a power charge limit; and

    overcharging the battery using the power charge limit so that all of the cells in the battery become fully charged.

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