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Title: Method and apparatus for in-situ characterization of energy storage and energy conversion devices

Abstract

Disclosed are methods and apparatuses for determining an impedance of an energy-output device using a random noise stimulus applied to the energy-output device. A random noise signal is generated and converted to a random noise stimulus as a current source correlated to the random noise signal. A bias-reduced response of the energy-output device to the random noise stimulus is generated by comparing a voltage at the energy-output device terminal to an average voltage signal. The random noise stimulus and bias-reduced response may be periodically sampled to generate a time-varying current stimulus and a time-varying voltage response, which may be correlated to generate an autocorrelated stimulus, an autocorrelated response, and a cross-correlated response. Finally, the autocorrelated stimulus, the autocorrelated response, and the cross-correlated response may be combined to determine at least one of impedance amplitude, impedance phase, and complex impedance.

Inventors:
 [1];  [1];  [2];  [3]
  1. Idaho Falls, ID
  2. Butte, MT
  3. Layton, UT
Issue Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1014497
Patent Number(s):
7675293
Application Number:
U S Patent Application 11/381,689
Assignee:
Battelle Energy Alliance, LLC (Idaho Falls, ID)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
DOE Contract Number:  
AC07-05ID14517
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Christophersen, Jon P, Motloch, Chester G, Morrison, John L, and Albrecht, Weston. Method and apparatus for in-situ characterization of energy storage and energy conversion devices. United States: N. p., 2010. Web.
Christophersen, Jon P, Motloch, Chester G, Morrison, John L, & Albrecht, Weston. Method and apparatus for in-situ characterization of energy storage and energy conversion devices. United States.
Christophersen, Jon P, Motloch, Chester G, Morrison, John L, and Albrecht, Weston. Tue . "Method and apparatus for in-situ characterization of energy storage and energy conversion devices". United States. https://www.osti.gov/servlets/purl/1014497.
@article{osti_1014497,
title = {Method and apparatus for in-situ characterization of energy storage and energy conversion devices},
author = {Christophersen, Jon P and Motloch, Chester G and Morrison, John L and Albrecht, Weston},
abstractNote = {Disclosed are methods and apparatuses for determining an impedance of an energy-output device using a random noise stimulus applied to the energy-output device. A random noise signal is generated and converted to a random noise stimulus as a current source correlated to the random noise signal. A bias-reduced response of the energy-output device to the random noise stimulus is generated by comparing a voltage at the energy-output device terminal to an average voltage signal. The random noise stimulus and bias-reduced response may be periodically sampled to generate a time-varying current stimulus and a time-varying voltage response, which may be correlated to generate an autocorrelated stimulus, an autocorrelated response, and a cross-correlated response. Finally, the autocorrelated stimulus, the autocorrelated response, and the cross-correlated response may be combined to determine at least one of impedance amplitude, impedance phase, and complex impedance.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {3}
}

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Works referenced in this record:

Determination of the state-of-health of VRLA batteries by means of noise measurements
conference, January 2001