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Title: Method of detecting system function by measuring frequency response

Abstract

Methods of rapidly measuring an impedance spectrum of an energy storage device in-situ over a limited number of logarithmically distributed frequencies are described. An energy storage device is excited with a known input signal, and a response is measured to ascertain the impedance spectrum. An excitation signal is a limited time duration sum-of-sines consisting of a select number of frequencies. In one embodiment, magnitude and phase of each frequency of interest within the sum-of-sines is identified when the selected frequencies and sample rate are logarithmic integer steps greater than two. This technique requires a measurement with a duration of one period of the lowest frequency. In another embodiment, where selected frequencies are distributed in octave steps, the impedance spectrum can be determined using a captured time record that is reduced to a half-period of the lowest frequency.

Inventors:
; ; ;
Publication Date:
Research Org.:
INL (Idaho National Laboratory (United States))
Sponsoring Org.:
USDOE
OSTI Identifier:
1082875
Patent Number(s):
8,352,204
Application Number:
12/772,880
Assignee:
Battelle Energy Alliance, LLC (Idaho Falls, ID)
DOE Contract Number:  
AC07-05ID14517
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Morrison, John L., Morrison, William H., Christophersen, Jon P., and Motloch, Chester G. Method of detecting system function by measuring frequency response. United States: N. p., 2013. Web.
Morrison, John L., Morrison, William H., Christophersen, Jon P., & Motloch, Chester G. Method of detecting system function by measuring frequency response. United States.
Morrison, John L., Morrison, William H., Christophersen, Jon P., and Motloch, Chester G. Tue . "Method of detecting system function by measuring frequency response". United States. https://www.osti.gov/servlets/purl/1082875.
@article{osti_1082875,
title = {Method of detecting system function by measuring frequency response},
author = {Morrison, John L. and Morrison, William H. and Christophersen, Jon P. and Motloch, Chester G.},
abstractNote = {Methods of rapidly measuring an impedance spectrum of an energy storage device in-situ over a limited number of logarithmically distributed frequencies are described. An energy storage device is excited with a known input signal, and a response is measured to ascertain the impedance spectrum. An excitation signal is a limited time duration sum-of-sines consisting of a select number of frequencies. In one embodiment, magnitude and phase of each frequency of interest within the sum-of-sines is identified when the selected frequencies and sample rate are logarithmic integer steps greater than two. This technique requires a measurement with a duration of one period of the lowest frequency. In another embodiment, where selected frequencies are distributed in octave steps, the impedance spectrum can be determined using a captured time record that is reduced to a half-period of the lowest frequency.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {1}
}

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