An exploration of Li-ion cell relaxation using EIS

Anup Barai; Yue Guo; Andrew McGordon; Paul Jennings

An exploration of Li-ion cell relaxation using EIS

Anup Barai, Yue Guo, Andrew McGordon, Paul Jennings

University of Warwick

Research output: Contribution to conference › Paper › peer-review

Abstract

This paper describes a systematic study of the effect of cell relaxation after a charge or discharge event. The EIS technique was used to investigate how the properties of the cells changed with time after charge or discharge up to a maximum of 15 hours. It was found that different chemistries show different relaxation rates and frequency dependence of R _o and R _d . The cells still showed a relaxation at 15 hours after a charge/discharge event. A suggested compromise of measurement accuracy and test length is to measure the properties of cells 4 hours after a charge/discharge event.

Original language	English
Publication status	Published - 2014
Externally published	Yes
Event	35th FISITA World Automotive Congress, 2014 - Maastricht, Netherlands Duration: 2 Jun 2014 → 6 Jun 2014

Conference

Conference	35th FISITA World Automotive Congress, 2014
Country/Territory	Netherlands
City	Maastricht
Period	2/06/14 → 6/06/14

Keywords

EIS
Impedance
Li-ion battery
Relaxation
Testing

ASJC Scopus subject areas

Automotive Engineering
Safety, Risk, Reliability and Quality

Cite this

@conference{4897c8f6ebaf428ba80c662ad78b784d,

title = "An exploration of Li-ion cell relaxation using EIS",

abstract = " This paper describes a systematic study of the effect of cell relaxation after a charge or discharge event. The EIS technique was used to investigate how the properties of the cells changed with time after charge or discharge up to a maximum of 15 hours. It was found that different chemistries show different relaxation rates and frequency dependence of R o and R d . The cells still showed a relaxation at 15 hours after a charge/discharge event. A suggested compromise of measurement accuracy and test length is to measure the properties of cells 4 hours after a charge/discharge event. ",

keywords = "EIS, Impedance, Li-ion battery, Relaxation, Testing",

author = "Anup Barai and Yue Guo and Andrew McGordon and Paul Jennings",

year = "2014",

language = "English",

note = "35th FISITA World Automotive Congress, 2014 ; Conference date: 02-06-2014 Through 06-06-2014",

}

TY - CONF

T1 - An exploration of Li-ion cell relaxation using EIS

AU - Barai, Anup

AU - Guo, Yue

AU - McGordon, Andrew

AU - Jennings, Paul

PY - 2014

Y1 - 2014

N2 - This paper describes a systematic study of the effect of cell relaxation after a charge or discharge event. The EIS technique was used to investigate how the properties of the cells changed with time after charge or discharge up to a maximum of 15 hours. It was found that different chemistries show different relaxation rates and frequency dependence of R o and R d . The cells still showed a relaxation at 15 hours after a charge/discharge event. A suggested compromise of measurement accuracy and test length is to measure the properties of cells 4 hours after a charge/discharge event.

AB - This paper describes a systematic study of the effect of cell relaxation after a charge or discharge event. The EIS technique was used to investigate how the properties of the cells changed with time after charge or discharge up to a maximum of 15 hours. It was found that different chemistries show different relaxation rates and frequency dependence of R o and R d . The cells still showed a relaxation at 15 hours after a charge/discharge event. A suggested compromise of measurement accuracy and test length is to measure the properties of cells 4 hours after a charge/discharge event.

KW - EIS

KW - Impedance

KW - Li-ion battery

KW - Relaxation

KW - Testing

UR - http://www.scopus.com/inward/record.url?scp=85060446507&partnerID=8YFLogxK

M3 - Paper

T2 - 35th FISITA World Automotive Congress, 2014

Y2 - 2 June 2014 through 6 June 2014

ER -

An exploration of Li-ion cell relaxation using EIS

Abstract

Conference

Keywords

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this