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Title: Energy storage cell impedance measuring apparatus, methods and related systems

Abstract

Energy storage cell impedance testing devices, circuits, and related methods are disclosed. An energy storage cell impedance measuring device includes a sum of sinusoids (SOS) current excitation circuit including differential current sources configured to isolate a ground terminal of the differential current sources from a positive terminal and a negative terminal of an energy storage cell. A method includes applying an SOS signal comprising a sum of sinusoidal current signals to the energy storage cell with the SOS current excitation circuit, each of the sinusoidal current signals oscillating at a different one of a plurality of different frequencies. The method also includes measuring an electrical signal at a positive terminal and a negative terminal of the energy storage cell, and computing an impedance of the energy storage cell at each of the plurality of different frequencies using the measured electrical signal.

Inventors:
; ;
Issue Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1414943
Patent Number(s):
9851414
Application Number:
14/789,959
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
Resource Relation:
Patent File Date: 2015 Jul 01
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Morrison, John L., Morrison, William H., and Christophersen, Jon P. Energy storage cell impedance measuring apparatus, methods and related systems. United States: N. p., 2017. Web.
Morrison, John L., Morrison, William H., & Christophersen, Jon P. Energy storage cell impedance measuring apparatus, methods and related systems. United States.
Morrison, John L., Morrison, William H., and Christophersen, Jon P. Tue . "Energy storage cell impedance measuring apparatus, methods and related systems". United States. https://www.osti.gov/servlets/purl/1414943.
@article{osti_1414943,
title = {Energy storage cell impedance measuring apparatus, methods and related systems},
author = {Morrison, John L. and Morrison, William H. and Christophersen, Jon P.},
abstractNote = {Energy storage cell impedance testing devices, circuits, and related methods are disclosed. An energy storage cell impedance measuring device includes a sum of sinusoids (SOS) current excitation circuit including differential current sources configured to isolate a ground terminal of the differential current sources from a positive terminal and a negative terminal of an energy storage cell. A method includes applying an SOS signal comprising a sum of sinusoidal current signals to the energy storage cell with the SOS current excitation circuit, each of the sinusoidal current signals oscillating at a different one of a plurality of different frequencies. The method also includes measuring an electrical signal at a positive terminal and a negative terminal of the energy storage cell, and computing an impedance of the energy storage cell at each of the plurality of different frequencies using the measured electrical signal.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {12}
}

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