Monitoring device and method for determining at least one characteristic variable for the state of a battery

  • US 7,423,408 B2
  • Filed: 02/17/2005
  • Issued: 09/09/2008
  • Est. Priority Date: 02/18/2004
  • Status: Expired due to Fees
  • ×
    • Pin Icon | RPX Insight
    • Pin
First Claim
Patent Images

1. A method for determining at least one characteristic variable for the state of an electrochemical energy storage battery comprising:

  • determining the charge throughput (Δ

    Q) of the energy storage battery per time step (Δ

    t);

    determining a first characteristic figure (KS) in order to describe the stratification of the electrolyte concentration in the energy storage battery on the basis of a defined initial state (KS0) for an as-new energy storage battery;

    determining a second characteristic figure (KL) in order to describe the stratification of the state of charge (SOC) in the energy storage battery on the basis of a defined initial value (KL0) for an as-new energy storage battery during operation of the energy storage battery;

    in each time step (Δ

    t), adapting the first characteristic figure (KS) and the second characteristic figure (KL) as a function of the charge throughput (Δ

    Q) from the instantaneous state of the energy storage battery, which is characterized by the state of charge of the electrodes, the electrolyte concentration in the energy storage battery and the first and second characteristic figures (KS, KL); and

    determining at least one characteristic variable from the first and the second characteristic figures (KS, KL).

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×