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BATTERY STATE DETECTION DEVICE

  • US 20140218042A1
  • Filed: 01/23/2013
  • Published: 08/07/2014
  • Est. Priority Date: 01/31/2012
  • Status: Active Grant
First Claim
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1. A battery state detection device that detects whether a battery is normal or abnormal or a degree of deterioration of the battery, comprising:

  • measurement means for measuring complex impedances in a diffusion region of the battery;

    detection means for calculating a slope of a straight light or an approximate straight line which connects together two complex impedances or more of different frequencies in a diffusion region of the battery measured by the measurement means; and

    storage means that preliminarily stores a threshold value corresponding to the slope used for determining whether the battery is normal or abnormal or the degree of deterioration of the battery, whereinthe detection means detects whether the battery is normal or abnormal or the degree of deterioration of the battery by use of the predetermined threshold value stored in the storage means and the calculated slope.

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