KEPCO Journal on Electric Power and Energy

Korea Electric Power Corporation (한국전력공사)
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DTS-based Temperature Monitoring and Analysis of Battery Cell Deterioration Characteristics by Temperature Condition

DTS 기반 온도 감시 및 온도 조건에서의 배터리 셀 열화 특성 분석

  • SoonJong, Kwon (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Soo-Yeon, Kim (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Jin, Hwang (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Sang-Kyun, Woo (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Bong-Suck, Kim (KEPCO Research Institute, Korea Electric Power Corporation)
  • Received : 2022.08.16
  • Accepted : 2022.09.16
  • Published : 2022.12.30
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Abstract

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.

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Acknowledgement

This research was supported by Korea Electric Power Corporation under Grant R21TA03

References

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