Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2008-05-13
2008-05-13
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
Reexamination Certificate
active
07373264
ABSTRACT:
A method for determining a state of charge (SOC) or state of health (SOH) of a battery system includes performing a first step. The first step includes determining a set of initial values for parameters, coefficients, and derivatives based upon linear functional relationships. A result is computed based on the determination. After execution of the first step, intermediate functions are calculated based on the result. The parameters are updated based on the intermediate functions. An open circuit voltage VOCthat has a functional relationship with a voltage-based SOC (SOCV) is determined based on the updated parameters. The SOCVis extracted by inverting an expression of VO(SOCV). A current based SOC (SOCC) is calculated. A weight for weighting the SOCCand the SOCVis calculated. A SOC is calculated based on the weight. VOis a battery voltage.
REFERENCES:
patent: 6359419 (2002-03-01), Verbrugge et al.
Frisch Damon R.
Koch Brian J.
Tate, Jr. Edward D.
Verbrugge Mark W.
Barlow John
Cherry Stephen J
General Motors Corporation
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