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BATTERY SYSTEM AND METHOD FOR DETECTING CURRENT RESTRICTION STATE IN A BATTERY SYSTEM

  • US 20110148361A1
  • Filed: 12/21/2010
  • Published: 06/23/2011
  • Est. Priority Date: 12/22/2009
  • Status: Abandoned Application
First Claim
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1. A battery system comprising:

  • a battery pack that includes at least one parallel battery unit each of which includes a plurality of series battery units each of which includes a current restriction portion and at least one battery cell serially connected to each other, the plurality of series battery units being connected to each other in parallel;

    a detecting portion that detects voltage and current of each of the at least one parallel battery unit, and calculates the accumulated current value of each of the at least parallel battery unit;

    a storage portion that stores reference voltage values to be associated the accumulated current value of each of the at least one parallel battery unit calculated by said detecting portion; and

    a determining portion that reads, from said storage portion, one of the reference voltages corresponding to the accumulated value of each of the at least one parallel battery unit detected by said detecting portion, and compares the read reference voltage with the detection voltage of said each of the at least one parallel battery unit detected by said detecting portion whereby determining that the battery cell current restriction portion is brought in a current restriction state if the difference between the detection voltage and the read reference voltage is larger than a predetermined value.

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