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CELL CONTROL UNIT FAULT DETECTION SYSTEMS AND METHODS

  • US 20170126035A1
  • Filed: 08/31/2016
  • Published: 05/04/2017
  • Est. Priority Date: 11/04/2015
  • Status: Active Grant
First Claim
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1. A battery system comprising:

  • a battery module comprising a first cell group and a second cell group connected in series between terminals of the battery module, wherein the first cell group comprises a first plurality of battery cells connected in series and the second cell group comprises a second plurality of battery cells connected in series; and

    a cell control unit communicatively coupled to a plurality of sensors, wherein the cell control unit comprises;

    a first analog-to-digital converter configured to output a first cell group voltage based at least in part on a first voltage measured across the first cell group by the plurality of sensors;

    a second analog-to-digital converter configured to;

    output a second cell group voltage based at least in part on a second voltage measured across the second cell group by the plurality of sensors;

    output a measured battery module voltage based at least in part on a third voltage measured across the battery module by the plurality of sensors; and

    logic circuitry communicatively coupled to the first analog-to-digital converter and the second analog-to-digital converter, wherein the logic circuitry is configured to;

    determine a calculated battery module voltage based at least in part on the first cell group voltage and the second cell group voltage; and

    determine whether a fault is expected to be present in the cell control unit, the battery module, or both based at least in part on the measured battery module voltage and the calculated battery module voltage.

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