Available input-output power estimating device for secondary...

Details Available input-output power estimating device for secondary... Available input-output power estimating device for secondary...

2005-06-10

2009-02-03

Ullah, Akm E (Department: 2838)

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

C324S426000, C324S430000, C324S433000, C320S132000, C702S063000

Reexamination Certificate

active

07486079

ABSTRACT:
An available input-output power estimating device for a secondary battery includes a parameter estimating section substituting a measured current value I and a measured voltage value V into an adaptive digital filter using an equivalent circuit model of the secondary battery for thereby collectively estimating values of parameters in the equivalent circuit model, an open circuit voltage calculator substituting I, V, and the estimated parameter values into the equivalent circuit model for calculating an open circuit voltage {circumflex over (V)}0, an available input power estimating section estimating an available input power Pinof the secondary battery using components (ân,{circumflex over (b)}n), associated with a direct term in the equivalent circuit model, in the estimated parameters, the open circuit voltage estimate value {circumflex over (V)}0and an upper limit voltage Vmaxof the terminal voltage, and an available output power estimating section estimating an available output power Poutfor the secondary battery using (ân,{circumflex over (b)}n), {circumflex over (V)}0and a lower limit voltage Vminof the terminal voltage.

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D. Yumoto, et al., “Method of Estimating Internal State Quantity of Battery Using Adaptive Digital Filter Theory,” Automobile Technology Association, Academic Lecture Handout, No. 20035031, May 21, 2003, pp. 1-6.

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