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COMPENSATION FOR PARASITIC RESISTANCE IN BATTERY MONITORING

  • US 20080018305A1
  • Filed: 07/05/2007
  • Published: 01/24/2008
  • Est. Priority Date: 05/31/2006
  • Status: Active Grant
First Claim
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1. A device for correcting a monitored battery cell voltage read from a battery balancing circuit to an actual battery cell voltage, comprising:

  • a plurality of balancing circuits, coupled to each of a plurality of coupled battery cells, the plurality of balancing circuits enabled to conduct current to and from the battery cells;

    a share bus, coupled to at least each of the plurality of balancing circuits; and

    a monitoring circuit, coupled to the battery balancing circuit, the monitoring circuit configured to;

    monitor a battery cell voltage;

    monitor a share bus voltage; and

    adjust the monitored battery cell voltage to reflect an actual battery cell voltage based on the share bus voltage, a share bus resistance and a balancing circuit parasitic resistance.

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