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Abnormality diagnosis device and method for battery pack

  • US 20040001996A1
  • Filed: 06/18/2003
  • Published: 01/01/2004
  • Est. Priority Date: 06/26/2002
  • Status: Active Grant
First Claim
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1. An abnormality diagnosis device for a battery pack comprising a plurality of parallel blocks, each of which comprises a plurality of cells connected in parallel, and which are themselves connected in series, comprising:

  • a voltage detection device which detects voltages of each parallel block of the battery pack; and

    an abnormality determination device which performs a diagnosis of abnormality of the cells connected in parallel within each parallel block, based upon an amount of change of voltages of each parallel block during discharge or charge of the battery pack.

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