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Apparatus for detecting charged state of secondary battery

  • US 7,679,328 B2
  • Filed: 10/26/2006
  • Issued: 03/16/2010
  • Est. Priority Date: 10/26/2005
  • Status: Expired due to Fees
First Claim
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1. An apparatus for detecting a charged state of a battery being mounted on a vehicle, the apparatus comprising:

  • a data acquiring device configured to acquire a plurality of pairs of data consisting of current and voltage of the battery;

    a stabilizing device configured to stabilize a polarized state of the battery;

    a first calculating device configured to calculate a pseudo open-circuit voltage of the battery based on i) the pairs of data acquired in a state where the polarized state of the battery is stabilized and ii) an internal resistance of the battery calculated at a latest sampling time; and

    a second calculating device configured to calculate, as the charged state, a state of charge based on the pseudo open-circuit voltage.

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