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Battery system and method for determining battery module voltages

  • US 9,400,312 B2
  • Filed: 08/12/2011
  • Issued: 07/26/2016
  • Est. Priority Date: 09/20/2010
  • Status: Active Grant
First Claim
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1. A battery system comprising:

  • at least two battery modules connected in series to provide a battery voltage, each of the at least two battery modules comprising;

    a plurality of battery cells connected in series to provide a battery module voltage;

    a cell voltage sensing unit configured to measure a battery cell voltage of each battery cell of the plurality of battery cells; and

    a module voltage sensing unit configured to measure the battery module voltage independently of the cell voltage sensing unit; and

    a central controller, the central controller being operatively connected to the cell voltage sensing unit of each of the at least two battery modules via a common communication bus, the central controller being operatively connected to the module voltage sensing unit of each of the at least two battery modules via separate connections.

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