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State-of-charge estimating device of secondary battery

  • US 7,352,156 B2
  • Filed: 07/16/2006
  • Issued: 04/01/2008
  • Est. Priority Date: 07/19/2005
  • Status: Active Grant
First Claim
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1. A state-of-charge estimating device for estimating a state-of-charge of a secondary battery connected to a load, comprising:

  • a current detecting device for detecting a current I of the secondary battery;

    a terminal voltage detecting device for detecting a terminal voltage V of the secondary battery; and

    a controller receiving input from the current detecting device and the terminal voltage detecting device, the controller including;

    an open-circuit voltage estimating part operable to perform an adaptive digital filter computing treatment to estimate at least one battery parameter in a battery model

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