State of charge determination of LiFePO4 batteries using an external applied magnetic field

Thomas Gallien; Bernhard Schweighofer; Manes Recheis; Hannes Wegleiter

doi:10.1109/IECON.2013.6699775

State of charge determination of LiFePO4 batteries using an external applied magnetic field

Thomas Gallien, Bernhard Schweighofer, Manes Recheis, Hannes Wegleiter

Research output: Conference proceeding/Chapter in Book/Report/ › Conference Paper › peer-review

Abstract

In recent years, lithium ion (Li-ion) batteries have become ubiquitous energy sources for various battery-powered applications. Due to the good availability, the moderate raw material costs and the thermal stability, lithium iron phosphate (LiFePO₄) has become a common cathode active material for secondary cells. Batteries of this cell chemistry are further characterized by a high power density and are therefore often used in automotive applications. Unfortunately these cells show nonlinear and very flat open circuit voltage (OCV) characteristics, therefore the state of charge (SOC) can not be estimated accurately by means of model based estimation algorithms. This paper investigates an alternative way to determine the cell's SOC, whereas instead of the OCV in combination with Coulomb counting, the variation of the inductance of an external sense coil is used to quantify the SOC.

Original language	English
Title of host publication	IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society
Pages	4000-4004
Number of pages	5
DOIs	https://doi.org/10.1109/IECON.2013.6699775
Publication status	Published - 13 Nov 2013
Externally published	Yes
Event	IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society - Vienna, Austria Duration: 10 Nov 2013 → 13 Nov 2013

Conference

Conference	IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society
Period	10/11/13 → 13/11/13

Keywords

Coils
System-on-chip
Batteries
Inductance
Current measurement
Battery charge measurement
Temperature measurement

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10.1109/IECON.2013.6699775

https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6699775

Cite this

@inproceedings{11ab6161e3544f66b1cfc8bb68da5cb9,

title = "State of charge determination of LiFePO4 batteries using an external applied magnetic field",

abstract = "In recent years, lithium ion (Li-ion) batteries have become ubiquitous energy sources for various battery-powered applications. Due to the good availability, the moderate raw material costs and the thermal stability, lithium iron phosphate (LiFePO4) has become a common cathode active material for secondary cells. Batteries of this cell chemistry are further characterized by a high power density and are therefore often used in automotive applications. Unfortunately these cells show nonlinear and very flat open circuit voltage (OCV) characteristics, therefore the state of charge (SOC) can not be estimated accurately by means of model based estimation algorithms. This paper investigates an alternative way to determine the cell's SOC, whereas instead of the OCV in combination with Coulomb counting, the variation of the inductance of an external sense coil is used to quantify the SOC.",

keywords = "Coils, System-on-chip, Batteries, Inductance, Current measurement, Battery charge measurement, Temperature measurement",

author = "Thomas Gallien and Bernhard Schweighofer and Manes Recheis and Hannes Wegleiter",

year = "2013",

month = nov,

day = "13",

doi = "10.1109/IECON.2013.6699775",

language = "English",

isbn = "978-1-4799-0224-8",

pages = "4000--4004",

booktitle = "IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society",

note = "IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society ; Conference date: 10-11-2013 Through 13-11-2013",

}

Gallien, T, Schweighofer, B, Recheis, M & Wegleiter, H 2013, State of charge determination of LiFePO4 batteries using an external applied magnetic field. in IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society., 6699775, pp. 4000-4004, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 10/11/13. https://doi.org/10.1109/IECON.2013.6699775

TY - GEN

T1 - State of charge determination of LiFePO4 batteries using an external applied magnetic field

AU - Gallien, Thomas

AU - Schweighofer, Bernhard

AU - Recheis, Manes

AU - Wegleiter, Hannes

PY - 2013/11/13

Y1 - 2013/11/13

N2 - In recent years, lithium ion (Li-ion) batteries have become ubiquitous energy sources for various battery-powered applications. Due to the good availability, the moderate raw material costs and the thermal stability, lithium iron phosphate (LiFePO4) has become a common cathode active material for secondary cells. Batteries of this cell chemistry are further characterized by a high power density and are therefore often used in automotive applications. Unfortunately these cells show nonlinear and very flat open circuit voltage (OCV) characteristics, therefore the state of charge (SOC) can not be estimated accurately by means of model based estimation algorithms. This paper investigates an alternative way to determine the cell's SOC, whereas instead of the OCV in combination with Coulomb counting, the variation of the inductance of an external sense coil is used to quantify the SOC.

AB - In recent years, lithium ion (Li-ion) batteries have become ubiquitous energy sources for various battery-powered applications. Due to the good availability, the moderate raw material costs and the thermal stability, lithium iron phosphate (LiFePO4) has become a common cathode active material for secondary cells. Batteries of this cell chemistry are further characterized by a high power density and are therefore often used in automotive applications. Unfortunately these cells show nonlinear and very flat open circuit voltage (OCV) characteristics, therefore the state of charge (SOC) can not be estimated accurately by means of model based estimation algorithms. This paper investigates an alternative way to determine the cell's SOC, whereas instead of the OCV in combination with Coulomb counting, the variation of the inductance of an external sense coil is used to quantify the SOC.

KW - Coils

KW - System-on-chip

KW - Batteries

KW - Inductance

KW - Current measurement

KW - Battery charge measurement

KW - Temperature measurement

UR - https://ieeexplore.ieee.org/document/6699775/

U2 - 10.1109/IECON.2013.6699775

DO - 10.1109/IECON.2013.6699775

M3 - Conference Paper

SN - 978-1-4799-0224-8

SP - 4000

EP - 4004

BT - IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society

T2 - IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society

Y2 - 10 November 2013 through 13 November 2013

ER -

State of charge determination of LiFePO4 batteries using an external applied magnetic field

Abstract

Conference

Keywords

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