Method and apparatus for generalized recursive least-squares...

Details Method and apparatus for generalized recursive least-squares... Method and apparatus for generalized recursive least-squares...

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

11669196

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.

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