Method of detecting system function by measuring frequency response
Abstract
Realtime battery impedance spectrum is acquired using a onetime record. Fast Summation Transformation (FST) is a parallel method of acquiring a realtime battery impedance spectrum using a onetime 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. The time profile of this signal has a duration that is a few periods of the lowest frequency. The voltage response of the battery, average deleted, is the impedance of the battery in the time domain. Since the excitation frequencies are known and octave and harmonically related, a simple algorithm, FST, processes the time record by rectifying relative to the sine and cosine of each frequency. Another algorithm yields real and imaginary components for each frequency.
 Inventors:

 Butte, MT
 Manchester, CT
 Idaho Falls, ID
 Publication Date:
 Research Org.:
 Idaho National Lab. (INL), Idaho Falls, ID (United States)
 Sponsoring Org.:
 USDOE
 OSTI Identifier:
 1041020
 Patent Number(s):
 8,150,643
 Application Number:
 12/217,013
 Assignee:
 Battelle Energy Alliance, LLC (Idaho Falls, ID); Montana Tech of the University of Montana (Butte, MT); Qualtech Systems, Inc. (East Hartford, CT)
 DOE Contract Number:
 AC0705ID14517
 Resource Type:
 Patent
 Country of Publication:
 United States
 Language:
 English
 Subject:
 25 ENERGY STORAGE
Citation Formats
Morrison, John L, Morrison, William H, and Christophersen, Jon P. Method of detecting system function by measuring frequency response. United States: N. p., 2012.
Web.
Morrison, John L, Morrison, William H, & Christophersen, Jon P. Method of detecting system function by measuring frequency response. United States.
Morrison, John L, Morrison, William H, and Christophersen, Jon P. Tue .
"Method of detecting system function by measuring frequency response". United States. https://www.osti.gov/servlets/purl/1041020.
@article{osti_1041020,
title = {Method of detecting system function by measuring frequency response},
author = {Morrison, John L and Morrison, William H and Christophersen, Jon P},
abstractNote = {Realtime battery impedance spectrum is acquired using a onetime record. Fast Summation Transformation (FST) is a parallel method of acquiring a realtime battery impedance spectrum using a onetime 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. The time profile of this signal has a duration that is a few periods of the lowest frequency. The voltage response of the battery, average deleted, is the impedance of the battery in the time domain. Since the excitation frequencies are known and octave and harmonically related, a simple algorithm, FST, processes the time record by rectifying relative to the sine and cosine of each frequency. Another algorithm yields real and imaginary components for each frequency.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {4}
}
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