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Battery Control Device and Battery System

  • US 20110193413A1
  • Filed: 02/03/2011
  • Published: 08/11/2011
  • Est. Priority Date: 02/05/2010
  • Status: Active Grant
First Claim
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1. A battery control device for a battery module including a plurality of battery cell groups connected in series each made up with a plurality of battery cells connected in series, comprising:

  • a plurality of integrated circuits each of which is provided in correspondence to one of the plurality of battery cell groups, and executes control processing and monitor processing for each of the battery cells in the one of the battery cell groups;

    a first transmission path connecting the plurality of integrated circuits in series, through which a signal is transmitted among the integrated circuits;

    a second transmission path through which a first signal, including a startup signal or a command signal output from a higher-order control circuit that controls the plurality of integrated circuits, is transmitted via a first insulating circuit to a highest-order integrated circuit among the plurality of integrated circuits connected in series; and

    a third transmission path through which a signal sent from a lowest-order integrated circuit among the plurality of integrated circuits connected in series to the higher-order control circuit, is transmitted via a second insulating circuit, whereineach integrated circuit among the plurality of integrated circuits comprises;

    a constant voltage circuit that lowers a total voltage of a battery cell group corresponding to the integrated circuit to an integrated circuit internal voltage;

    a signal generation circuit that generates, based upon the first signal provided by the higher-order control circuit, a second signal assuming a wave height value different from a wave height value of the first signal and outputs the second signal; and

    a startup circuit that includes a first comparator assuming a first decision-making threshold value corresponding to the first signal and a second comparator assuming a second decision-making threshold value corresponding to the second signal, and starts up the constant voltage circuit in response to a change in an output from at least either the first comparator or the second comparator.

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