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Method of monitoring and/or controlling or automatically controlling the voltage of at least one group of cells in a compound of cells of an energy storage device

  • US 7,852,042 B2
  • Filed: 08/07/2008
  • Issued: 12/14/2010
  • Est. Priority Date: 02/07/2006
  • Status: Active Grant
First Claim
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1. A method of monitoring and controlling a voltage of at least one group of cells in a cell compound of an energy storage device in an onboard power supply system of a motor vehicle, comprising the acts of:

  • connecting a cell group logic to the group of cells by a supply line by which the group of cells is charged or discharged;

    monitoring with the cell group logic the voltage of the group of cells;

    controlling with the cell group logic charging or discharging of the group of cells, where the cell group logic takes energy from a rail line to charge the group of cells or feeds energy to the rail line from the group of cells;

    conducting a data communication between the cell group logic and at least one of another cell group logic and a central logic on the rail line at voltage levels above an idle voltage level which is equal to or greater than a predetermined maximal voltage level below which the group of cells is charged or discharged; and

    switching the cell group logic to active when the rail line voltage is determined to be above an enable voltage level which below the predetermined maximal voltage level.

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