@inproceedings{34f6172e8880440280d6be59f0a912ae,
title = "Fast-settling Onboard Electrochemical Impedance Spectroscopy System Adopting Quasi-linear-phase Band-pass Filter",
abstract = "Electrochemical impedance spectroscopy (EIS) is a non-invasive tool capable of characterizing batteries' states based on impedance over a specific frequency range. Considering that the use of lithium-ion batteries with large capacity in many electric vehicles imposes an extremely high impedance measurement accuracy in a range of sub-mΩ, EIS systems widely use a digital lock-in amplifier (DLIA) that allows ultra-precision impedance measurement at the cost of a long settling time. This work presents an onboard EIS system with further reduced measurement time. In the proposed EIS system, the DLIA embedding of a pair of quasi-linear-phase band-pass filters is utilized to shorten the settling time by widening the bandwidth of the noise suppression low-pass filter with minimum accuracy degradation. Compared to the EIS systems using the conventional DLIA, this work achieves a 45\% and 57\% reduction in the estimated settling time over the frequency range of 1-to-1000 Hz and at the lower bound (1 Hz), respectively.",
keywords = "Battery management, electrochemical impedance spectroscopy, impedance measurement, measurement time, quadrature demodulation",
author = "Lee, \{Young Nam\} and Choi, \{Kyung Sik\} and Jo, \{Seong Won\} and Gul Rahim and Kyeongha Kwon and Lee, \{Sang Gug\}",
note = "Publisher Copyright: {\textcopyright} 2023 IEEE.; 2023 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2023 ; Conference date: 22-05-2023 Through 25-05-2023",
year = "2023",
doi = "10.1109/I2MTC53148.2023.10176024",
language = "English",
series = "Conference Record - IEEE Instrumentation and Measurement Technology Conference",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "I2MTC 2023 - 2023 IEEE International Instrumentation and Measurement Technology Conference",
}
