TY - GEN
T1 - A Novel Method for High Frequency Battery Impedance Measurements
AU - Landinger, Thomas F.
AU - Schwarzberger, Guenter
AU - Jossen, Andreas
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/7
Y1 - 2019/7
N2 - Electrochemical Impedance Spectroscopy (EIS) is widely used to measure the impedance of lithium-ion (Li-ion) battery cells. The EIS focuses on frequencies from millihertz to kilohertz, since the electrochemical processes do not have shorter time constants. To investigate high frequency phenomena as the electromagnetic compatibility (EMC) of an automotive traction battery, impedance measurements also in the higher megahertz range are necessary. State-of-the-art EIS measurement devices for batteries do not meet the requirements of this application, as they can cause electromagnetic wave reflections and do not provide sufficient calibration techniques. In this paper, we present a method to determine the battery impedance for a wide frequency range from 1 kHz to 300 MHz. Using a vector network analyzer, two-port scattering parameters (S-parameters) of a 18650 Li-ion cylindrical cell are measured with the shunt-through method. The resulting cell impedance is 40 Ωm at 1 kHz and increases to 40 Ω at 300 MHz mainly due to the external inductance of the cell.
AB - Electrochemical Impedance Spectroscopy (EIS) is widely used to measure the impedance of lithium-ion (Li-ion) battery cells. The EIS focuses on frequencies from millihertz to kilohertz, since the electrochemical processes do not have shorter time constants. To investigate high frequency phenomena as the electromagnetic compatibility (EMC) of an automotive traction battery, impedance measurements also in the higher megahertz range are necessary. State-of-the-art EIS measurement devices for batteries do not meet the requirements of this application, as they can cause electromagnetic wave reflections and do not provide sufficient calibration techniques. In this paper, we present a method to determine the battery impedance for a wide frequency range from 1 kHz to 300 MHz. Using a vector network analyzer, two-port scattering parameters (S-parameters) of a 18650 Li-ion cylindrical cell are measured with the shunt-through method. The resulting cell impedance is 40 Ωm at 1 kHz and increases to 40 Ω at 300 MHz mainly due to the external inductance of the cell.
KW - 18650 cell
KW - automotive traction battery
KW - electrochemical impedance spectroscopy
KW - high frequency impedance
KW - partial inductance
KW - shunt-through method
UR - http://www.scopus.com/inward/record.url?scp=85073059981&partnerID=8YFLogxK
U2 - 10.1109/ISEMC.2019.8825315
DO - 10.1109/ISEMC.2019.8825315
M3 - Conference contribution
AN - SCOPUS:85073059981
T3 - 2019 IEEE International Symposium on Electromagnetic Compatibility, Signal and Power Integrity, EMC+SIPI 2019
SP - 106
EP - 110
BT - 2019 IEEE International Symposium on Electromagnetic Compatibility, Signal and Power Integrity, EMC+SIPI 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE International Symposium on Electromagnetic Compatibility, Signal and Power Integrity, EMC+SIPI 2019
Y2 - 22 July 2019 through 26 July 2019
ER -