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    Rights statement: This is the author’s version of a work that was accepted for publication in Journal of Power Sources. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Power Sources, 329, 2016 DOI: 10.1016/j.jpowsour.2016.08.120

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Temperature dependency of state of charge inhomogeneities and their equalization in cylindrical lithium-ion cells

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Temperature dependency of state of charge inhomogeneities and their equalization in cylindrical lithium-ion cells. / Osswald, P. J.; Erhard, S. V.; Rheinfeld, A. et al.
In: Journal of Power Sources, Vol. 329, 15.10.2016, p. 546-552.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Osswald, PJ, Erhard, SV, Rheinfeld, A, Rieger, B, Hoster, H & Jossen, A 2016, 'Temperature dependency of state of charge inhomogeneities and their equalization in cylindrical lithium-ion cells', Journal of Power Sources, vol. 329, pp. 546-552. https://doi.org/10.1016/j.jpowsour.2016.08.120

APA

Osswald, P. J., Erhard, S. V., Rheinfeld, A., Rieger, B., Hoster, H., & Jossen, A. (2016). Temperature dependency of state of charge inhomogeneities and their equalization in cylindrical lithium-ion cells. Journal of Power Sources, 329, 546-552. https://doi.org/10.1016/j.jpowsour.2016.08.120

Vancouver

Osswald PJ, Erhard SV, Rheinfeld A, Rieger B, Hoster H, Jossen A. Temperature dependency of state of charge inhomogeneities and their equalization in cylindrical lithium-ion cells. Journal of Power Sources. 2016 Oct 15;329:546-552. Epub 2016 Sept 4. doi: 10.1016/j.jpowsour.2016.08.120

Author

Osswald, P. J. ; Erhard, S. V. ; Rheinfeld, A. et al. / Temperature dependency of state of charge inhomogeneities and their equalization in cylindrical lithium-ion cells. In: Journal of Power Sources. 2016 ; Vol. 329. pp. 546-552.

Bibtex

@article{2fc358bc45d34aae84d60cf62d63eceb,
title = "Temperature dependency of state of charge inhomogeneities and their equalization in cylindrical lithium-ion cells",
abstract = "The influence of cell temperature on the current density distribution and accompanying inhomogeneities in state of charge (SOC) during cycling is analyzed in this work. To allow for a detailed insight in the electrochemical behavior of the cell, commercially available 26650 cells were modified to allow for measuring local potentials at four different, nearly equidistant positions along the electrodes. As a follow-up to our previous work investigating local potentials within a cell, we apply this method for studying SOC deviations and their sensitivity to cell temperature. The local potential distribution was studied during constant current discharge operations for various current rates and discharge pulses in order to evoke local inhomogeneities for temperatures ranging from 10 °C to 40 °C. Differences in local potentials were considered for estimating local SOC variations within the electrodes. It could be observed that even low currents such as 0.1C can lead to significant inhomogeneities, whereas a higher cell temperature generally results in more pronounced inhomogeneities. A rapid SOC equilibration can be observed if the variation in the SOC distribution corresponds to a considerable potential difference defined by the open circuit voltage of either the positive or negative electrode. With increasing temperature, accelerated equalization effects can be observed.",
keywords = "Lithium-ion battery, Current density distribution, Local potential measurements, SOC inhomogeneity, Temperature dependency",
author = "Osswald, {P. J.} and Erhard, {S. V.} and A. Rheinfeld and B. Rieger and Harry Hoster and A. Jossen",
note = "This is the author{\textquoteright}s version of a work that was accepted for publication in Journal of Power Sources. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Power Sources, 329, 2016 DOI: 10.1016/j.jpowsour.2016.08.120",
year = "2016",
month = oct,
day = "15",
doi = "10.1016/j.jpowsour.2016.08.120",
language = "English",
volume = "329",
pages = "546--552",
journal = "Journal of Power Sources",
issn = "0378-7753",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Temperature dependency of state of charge inhomogeneities and their equalization in cylindrical lithium-ion cells

AU - Osswald, P. J.

AU - Erhard, S. V.

AU - Rheinfeld, A.

AU - Rieger, B.

AU - Hoster, Harry

AU - Jossen, A.

N1 - This is the author’s version of a work that was accepted for publication in Journal of Power Sources. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Power Sources, 329, 2016 DOI: 10.1016/j.jpowsour.2016.08.120

PY - 2016/10/15

Y1 - 2016/10/15

N2 - The influence of cell temperature on the current density distribution and accompanying inhomogeneities in state of charge (SOC) during cycling is analyzed in this work. To allow for a detailed insight in the electrochemical behavior of the cell, commercially available 26650 cells were modified to allow for measuring local potentials at four different, nearly equidistant positions along the electrodes. As a follow-up to our previous work investigating local potentials within a cell, we apply this method for studying SOC deviations and their sensitivity to cell temperature. The local potential distribution was studied during constant current discharge operations for various current rates and discharge pulses in order to evoke local inhomogeneities for temperatures ranging from 10 °C to 40 °C. Differences in local potentials were considered for estimating local SOC variations within the electrodes. It could be observed that even low currents such as 0.1C can lead to significant inhomogeneities, whereas a higher cell temperature generally results in more pronounced inhomogeneities. A rapid SOC equilibration can be observed if the variation in the SOC distribution corresponds to a considerable potential difference defined by the open circuit voltage of either the positive or negative electrode. With increasing temperature, accelerated equalization effects can be observed.

AB - The influence of cell temperature on the current density distribution and accompanying inhomogeneities in state of charge (SOC) during cycling is analyzed in this work. To allow for a detailed insight in the electrochemical behavior of the cell, commercially available 26650 cells were modified to allow for measuring local potentials at four different, nearly equidistant positions along the electrodes. As a follow-up to our previous work investigating local potentials within a cell, we apply this method for studying SOC deviations and their sensitivity to cell temperature. The local potential distribution was studied during constant current discharge operations for various current rates and discharge pulses in order to evoke local inhomogeneities for temperatures ranging from 10 °C to 40 °C. Differences in local potentials were considered for estimating local SOC variations within the electrodes. It could be observed that even low currents such as 0.1C can lead to significant inhomogeneities, whereas a higher cell temperature generally results in more pronounced inhomogeneities. A rapid SOC equilibration can be observed if the variation in the SOC distribution corresponds to a considerable potential difference defined by the open circuit voltage of either the positive or negative electrode. With increasing temperature, accelerated equalization effects can be observed.

KW - Lithium-ion battery

KW - Current density distribution

KW - Local potential measurements

KW - SOC inhomogeneity

KW - Temperature dependency

U2 - 10.1016/j.jpowsour.2016.08.120

DO - 10.1016/j.jpowsour.2016.08.120

M3 - Journal article

VL - 329

SP - 546

EP - 552

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

ER -