Measurements of Electric Performance and Impedance of a 75 Ah NMC Lithium Battery Module

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Measurements of Electric Performance and Impedance of a 75 Ah NMC Lithium Battery Module. / Jensen, Søren Højgaard; Engelbrecht, Kurt.

In: Electrochemical Society. Journal, Vol. 159, No. 6, 2012, p. A791-A797.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Jensen, Søren Højgaard; Engelbrecht, Kurt / Measurements of Electric Performance and Impedance of a 75 Ah NMC Lithium Battery Module.

In: Electrochemical Society. Journal, Vol. 159, No. 6, 2012, p. A791-A797.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{1dfee95cace54f9ea5ac3947c8737de4,
title = "Measurements of Electric Performance and Impedance of a 75 Ah NMC Lithium Battery Module",
abstract = "Detailed characterization of battery modules is necessary to construct reliable models that incorporate performance related aspects of the modules such as thermodynamics, electrochemical reaction kinetics and degradation mechanisms. Charge-discharge curves, temperature and battery impedance measurements can provide information about these aspects. Charge-discharge curves can be used to measure the battery open circuit voltage and the internal resistance. Temperature measurements provide information about the thermodynamic reactions and impedance spectra yield detailed information about the reaction kinetics. In this paper we present the measurement methods used to examine the internal resistance, the capacity and the impedance of a 75 Ah NMC battery module. In order to measure the impedance of the battery module and of the individual cells in the module, we combine the single sine technique and the Laplace transformed excitation signal technique which each have pros and cons. By combining the two impedance measurement techniques we are able to reduce the measurement time by a factor of 20 relative to ordinary single-sine measurements. Further we use the impedance measurements to calculate the overvoltage as a function of state of charge and the difference between charging overvoltage and discharging overvoltage and compare it with measurements. ©2012 The Electrochemical Society",
author = "Jensen, {Søren Højgaard} and Kurt Engelbrecht",
note = "Copyright The Electrochemical Society, Inc. [2012]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).",
year = "2012",
doi = "10.1149/2.088206jes",
volume = "159",
pages = "A791--A797",
journal = "Electrochemical Society. Journal",
issn = "0013-4651",
publisher = "Electrochemical Society, Incorporated",
number = "6",

}

RIS

TY - JOUR

T1 - Measurements of Electric Performance and Impedance of a 75 Ah NMC Lithium Battery Module

AU - Jensen,Søren Højgaard

AU - Engelbrecht,Kurt

N1 - Copyright The Electrochemical Society, Inc. [2012]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).

PY - 2012

Y1 - 2012

N2 - Detailed characterization of battery modules is necessary to construct reliable models that incorporate performance related aspects of the modules such as thermodynamics, electrochemical reaction kinetics and degradation mechanisms. Charge-discharge curves, temperature and battery impedance measurements can provide information about these aspects. Charge-discharge curves can be used to measure the battery open circuit voltage and the internal resistance. Temperature measurements provide information about the thermodynamic reactions and impedance spectra yield detailed information about the reaction kinetics. In this paper we present the measurement methods used to examine the internal resistance, the capacity and the impedance of a 75 Ah NMC battery module. In order to measure the impedance of the battery module and of the individual cells in the module, we combine the single sine technique and the Laplace transformed excitation signal technique which each have pros and cons. By combining the two impedance measurement techniques we are able to reduce the measurement time by a factor of 20 relative to ordinary single-sine measurements. Further we use the impedance measurements to calculate the overvoltage as a function of state of charge and the difference between charging overvoltage and discharging overvoltage and compare it with measurements. ©2012 The Electrochemical Society

AB - Detailed characterization of battery modules is necessary to construct reliable models that incorporate performance related aspects of the modules such as thermodynamics, electrochemical reaction kinetics and degradation mechanisms. Charge-discharge curves, temperature and battery impedance measurements can provide information about these aspects. Charge-discharge curves can be used to measure the battery open circuit voltage and the internal resistance. Temperature measurements provide information about the thermodynamic reactions and impedance spectra yield detailed information about the reaction kinetics. In this paper we present the measurement methods used to examine the internal resistance, the capacity and the impedance of a 75 Ah NMC battery module. In order to measure the impedance of the battery module and of the individual cells in the module, we combine the single sine technique and the Laplace transformed excitation signal technique which each have pros and cons. By combining the two impedance measurement techniques we are able to reduce the measurement time by a factor of 20 relative to ordinary single-sine measurements. Further we use the impedance measurements to calculate the overvoltage as a function of state of charge and the difference between charging overvoltage and discharging overvoltage and compare it with measurements. ©2012 The Electrochemical Society

U2 - 10.1149/2.088206jes

DO - 10.1149/2.088206jes

M3 - Journal article

VL - 159

SP - A791-A797

JO - Electrochemical Society. Journal

T2 - Electrochemical Society. Journal

JF - Electrochemical Society. Journal

SN - 0013-4651

IS - 6

ER -