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Method for checking and modulating battery capacity and power based on discharging/charging characteristics

  • US 8,823,325 B2
  • Filed: 04/07/2011
  • Issued: 09/02/2014
  • Est. Priority Date: 11/25/2010
  • Status: Active Grant
First Claim
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1. A method for checking and modulating capacity and power based on battery charging/discharging characteristics, comprising:

  • measuring a relationship between an open circuit voltage and an output electric capacity of a battery to obtain a first characteristic curve;

    measuring a relationship between a voltage and the output electric capacity of the battery at a predetermined maximum discharge current rate to obtain a second characteristic curve;

    selecting a first characteristic point and a second characteristic point from the first characteristic curve and the second characteristic curve respectively, wherein a voltage value corresponding to the first characteristic point is higher than a voltage value corresponding to the second characteristic point;

    establishing a characteristic boundary line passing the first characteristic point and the second characteristic point, wherein the first characteristic curve, the second characteristic curve, and the characteristic boundary line constitute a battery discharge boundary line to define an operation range; and

    managing the battery discharge within a discharge voltage range according to the output electric capacity of the battery, so as to keep a voltage-capacity curve falling within the operation range.

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