TY - GEN
T1 - Detection of cell-stack inhomogeneities via mechanical SOC and SOH measurement
AU - Ebert, Fabian
AU - Sextl, Gerhard
AU - Adermann, Jörn
AU - Reiter, Christoph
AU - Lienkamp, Markus
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/7/26
Y1 - 2017/7/26
N2 - Common lithium-ion battery cells consist of a cathode material, such as a Nickel-Manganese-Cobalt NMC and a graphite anode. Expansion of the graphite anode due to lithium intercalation while charging leads to macroscopic expansion of the entire cell, which is directly related to the state-of-charge. Therefore, conventional rigid-battery-module bracing causes pressure forces to build up periodically in the cell stack due to charging and discharging steps. In homogeneous cell stacks, the measured-pressure curve is a multiple of a single cell's measured pressure force curve. One cell, perhaps prematurely aged (i.e. diverging state-of-health), disturbs the module-pressure force curve. Due to the mechanical coupling of the cells in a module, a single sensor can monitor this.
AB - Common lithium-ion battery cells consist of a cathode material, such as a Nickel-Manganese-Cobalt NMC and a graphite anode. Expansion of the graphite anode due to lithium intercalation while charging leads to macroscopic expansion of the entire cell, which is directly related to the state-of-charge. Therefore, conventional rigid-battery-module bracing causes pressure forces to build up periodically in the cell stack due to charging and discharging steps. In homogeneous cell stacks, the measured-pressure curve is a multiple of a single cell's measured pressure force curve. One cell, perhaps prematurely aged (i.e. diverging state-of-health), disturbs the module-pressure force curve. Due to the mechanical coupling of the cells in a module, a single sensor can monitor this.
KW - Lithium-ion battery
KW - Mechanical stress
KW - SOC
KW - SOH
KW - Stack inhomogeneities
UR - http://www.scopus.com/inward/record.url?scp=85028616328&partnerID=8YFLogxK
U2 - 10.1109/ITEC.2017.7993329
DO - 10.1109/ITEC.2017.7993329
M3 - Conference contribution
AN - SCOPUS:85028616328
T3 - 2017 IEEE Transportation and Electrification Conference and Expo, ITEC 2017
SP - 545
EP - 549
BT - 2017 IEEE Transportation and Electrification Conference and Expo, ITEC 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 IEEE Transportation and Electrification Conference and Expo, ITEC 2017
Y2 - 22 June 2017 through 24 June 2017
ER -
