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http://dx.doi.org/10.7471/ikeee.2020.24.4.1129

Battery Internal Resistance Measurement System Robust to Charger Harmonic Noise  

Lee, Hyung-Kyu (Waton Inc.)
Kim, Gi-Taek (Dept. of Electrical & Electronics Eng., Kangwon National University)
Publication Information
Journal of IKEEE / v.24, no.4, 2020 , pp. 1129-1135 More about this Journal
Abstract
The effects of battery aging limit the rechargeable capacity, State of Health(SoH). It is very important to estimate the SoH in the battery monitoring system(BMS) and many algorithms of measuring the internal resistance of the battery were proposed. A method is used by applying a current source of a specific frequency to the battery and measuring the voltage response. When charging harmonic noise is generated in the voltage response, it results in poor resistance measurement accuracy. In this paper, a robust battery internal resistance measurement algorithm is proposed to eliminate the effect of charging noise by integrating the current source and voltage response signals for a certain period. It showed excellent accuracy and stable measurement results. Applying to the BMS for uninterruptible power supply, the usefulness of the proposed method is verified.
Keywords
Battery; Harmonic noise; SoH; BMS(Battery Monitoring System); Charging voltage noise;
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Times Cited By KSCI : 2  (Citation Analysis)
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