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Title: Method, system and computer-readable media for measuring impedance of an energy storage device

Abstract

Real-time battery impedance spectrum is acquired using a one-time record. Fast Summation Transformation (FST) is a parallel method of acquiring a real-time battery impedance spectrum using a one-time record that enables battery diagnostics. An excitation current to a battery is a sum of equal amplitude sine waves of frequencies that are octave harmonics spread over a range of interest. A sample frequency is also octave and harmonically related to all frequencies in the sum. A time profile of this sampled signal has a duration that is a few periods of the lowest frequency. A voltage response of the battery, average deleted, is an impedance of the battery in a time domain. Since the excitation frequencies are known and octave and harmonically related, a simple algorithm, FST, processes the time profile by rectifying relative to sine and cosine of each frequency. Another algorithm yields real and imaginary components for each frequency.

Inventors:
; ; ;
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1236563
Patent Number(s):
9,244,130
Application Number:
13/438,741
Assignee:
Battelle Energy Alliance, LLC INL
DOE Contract Number:  
AC07-05ID14517
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Apr 03
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 97 MATHEMATICS AND COMPUTING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Morrison, John L., Morrison, William H., Christophersen, Jon P., and Motloch, Chester G. Method, system and computer-readable media for measuring impedance of an energy storage device. United States: N. p., 2016. Web.
Morrison, John L., Morrison, William H., Christophersen, Jon P., & Motloch, Chester G. Method, system and computer-readable media for measuring impedance of an energy storage device. United States.
Morrison, John L., Morrison, William H., Christophersen, Jon P., and Motloch, Chester G. Tue . "Method, system and computer-readable media for measuring impedance of an energy storage device". United States. doi:. https://www.osti.gov/servlets/purl/1236563.
@article{osti_1236563,
title = {Method, system and computer-readable media for measuring impedance of an energy storage device},
author = {Morrison, John L. and Morrison, William H. and Christophersen, Jon P. and Motloch, Chester G.},
abstractNote = {Real-time battery impedance spectrum is acquired using a one-time record. Fast Summation Transformation (FST) is a parallel method of acquiring a real-time battery impedance spectrum using a one-time record that enables battery diagnostics. An excitation current to a battery is a sum of equal amplitude sine waves of frequencies that are octave harmonics spread over a range of interest. A sample frequency is also octave and harmonically related to all frequencies in the sum. A time profile of this sampled signal has a duration that is a few periods of the lowest frequency. A voltage response of the battery, average deleted, is an impedance of the battery in a time domain. Since the excitation frequencies are known and octave and harmonically related, a simple algorithm, FST, processes the time profile by rectifying relative to sine and cosine of each frequency. Another algorithm yields real and imaginary components for each frequency.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 26 00:00:00 EST 2016},
month = {Tue Jan 26 00:00:00 EST 2016}
}

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