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...

2008-01-29

2008-01-29

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

Reexamination Certificate

active

07324902

ABSTRACT:
A method for determining a voltage based or current based state of charge (SOC) and state of health (SOH) of a battery system is provided. The method includes: providing a model of the battery system including an equivalent circuit having both low frequency and high frequency elements; establishing a plurality of functional relationships comprising relationship of the equivalent circuit with SOC; reducing at least part of the plurality of functional relationships into a set of time segmented recursive functional relationships, wherein a state at a first time t can be modeled by a functional presentation of a state at a second time t−Δt that occurred before the first time t; and computing a set of data points based upon the set of time segmented recursive functional relationships using a matrix for operation in matrix algebra.

REFERENCES:
patent: 5539318 (1996-07-01), Sasaki
patent: 5945808 (1999-08-01), Kikuchi et al.
patent: 6011379 (2000-01-01), Singh et al.

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