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.
| Original language | English |
|---|---|
| Title of host publication | I2MTC 2023 - 2023 IEEE International Instrumentation and Measurement Technology Conference |
| Subtitle of host publication | Rising Above Covid-19, Proceedings |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (Electronic) | 9781665453837 |
| DOIs | |
| State | Published - 2023 |
| Event | 2023 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2023 - Kuala Lumpur, Malaysia Duration: 22 May 2023 → 25 May 2023 |
Publication series
| Name | Conference Record - IEEE Instrumentation and Measurement Technology Conference |
|---|---|
| Volume | 2023-May |
| ISSN (Print) | 1091-5281 |
Conference
| Conference | 2023 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2023 |
|---|---|
| Country/Territory | Malaysia |
| City | Kuala Lumpur |
| Period | 22/05/23 → 25/05/23 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
Keywords
- Battery management
- electrochemical impedance spectroscopy
- impedance measurement
- measurement time
- quadrature demodulation
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