As ESS safety issues increase recently, there is a need to more precisely monitor the temperature of the ESS. In this paper, DTS technology for temperature monitoring of ESS batteries is introduced and the temperature measurement principle is explained. The temperature of the battery module is measured using the DTS system, and the thermal deviation between battery cells inside the battery module is analyzed. In order to analyze how thermal imbalance affects the charging and discharging performance of the battery, an accelerated degradation test was conducted. Cycle life characteristics analysis, battery surface temperature change, and AC impedance characteristics were conducted to analyze how the performance of battery cells differs according to temperature conditions.
This research was supported by Korea Electric Power Corporation under Grant R21TA03
참고문헌
Abhisek Ukil, Hubert Braendle, Peter Krippner, "Distributed Temperature Sensing: Review of Technology and Applications", IEEE Sensors Journal, Volume 12, 885-892, May 2012 https://doi.org/10.1109/JSEN.2011.2162060
Byoung-Yong Chang, Su-Moon Park, "Electrochemical Impedance Spectroscopy", Annual Review of Analytical Chemistry 2010.3:207-229, https://doi.org/10.1146/annurev.anchem.012809.102211