Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Reexamination Certificate
2006-08-29
2006-08-29
Tibbits, Pia (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
With charging
Reexamination Certificate
active
07098625
ABSTRACT:
In charge rate estimating apparatus and method for a secondary cell, a current flowing through the secondary cell is measured, a voltage across terminals of the secondary cell is measured, an adaptive digital filtering is carried out using a cell model in a continuous time series shown in an equation (1), all of parameters at one time are estimated, the parameters corresponding to an open-circuit voltage which is an offset term of the equation (1) and coefficients of A(s), B(s), and C(s) which are transient terms, and, the charge rate is estimated from a relationship between a previously derived open-circuit voltage V0and the charge rate SOC using the open-circuit voltage V0,V=B(s)A(s)·I+1C(s)·V0,(1)wherein s denotes a Laplace transform operator, A(s), B(s), and C(s) denote poly-nominal functions of s.
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Nakamura Hideo
Yumoto Daijiro
Foley & Lardner LLP
Nissan Motor Co,. Ltd.
Tibbits Pia
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