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논문 기본 정보

자료유형
학술대회자료
저자정보
Minhwan Seo (Pohang University of Science and Technology) Youngbin Song (Pohang University of Science and Technology) Shina park (Pohang University of Science and Technology) Sang Woo Kim (Pohang University of Science and Technology)
저널정보
제어로봇시스템학회 제어로봇시스템학회 국제학술대회 논문집 ICCAS 2021
발행연도
2021.10
수록면
457 - 461 (5page)

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초록· 키워드

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Lithium-ion batteries undergo calendar aging and cycle aging, respectively, during storage and usage, and their capacity (an important factor for efficient and safe use of batteries) gradually decreases. Additionally, ambient temperature changes capacity of the battery. Existing methods developed for a specific temperature are difficult to apply to batteries under different temperatures. This study proposes a method to easily estimate capacities of batteries at various temperatures and aging conditions using two aging indicators. Electrochemical characteristics of the battery, which change according to battery aging, can be extracted through measured surface temperatures, terminal voltages, and currents: 1) One is change in entropy of the battery and 2) the other is change in internal resistance of the battery. It is confirmed that two aging indicators (entropy and internal resistance) have a linear relationship with battery aging through the experimental data, and that the linear relationship maintains the identical trend even at various temperatures. The results of estimating the battery capacities using the two aging indicators demonstrate that relative errors are less than 3.11%. Therefore, the proposed method can accurately estimate capacities of batteries in different temperature and aging conditions, and can be easily applied to batteries in various temperature environments.

목차

Abstract
1. INTRODUCTION
2. EXPERIMENTAL SETUP
3. BATTERY AGING INDICATOR
4. RESULTS AND DISCUSSIONS
5. CONCLUSION
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