인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Lithium-ion batteries (LIBs) play a pivotal role in energy storage systems (ESSs) and electric vehicles (EVs); however, they inevitably undergo capacity fading and performance degradation during long-term operation. Accordingly, accurate state-of-health (SOH) estimation is essential for reliable battery management. In this study, refined health indicators (HIs) are defined from charge– discharge voltage–time characteristics, and a flexible SOH prediction framework is proposed. Aging data obtained from INR21700-33J cells over 1,400 cycles are analyzed to extract multiple HIs, including mean voltage falloff (MVF), voltage interval of equal discharging/charging time difference (VIEDTD/VIECTD), and time interval of discharging/charging voltage difference (TIEDVD/TIECVD). These indicators are further subdivided using voltage resolutions of 0.1 V and 0.01 V, enabling robust HI extraction under data imbalance. To compensate for missing HI data caused by external operational factors in practical ESS environments, a denoising autoencoder (DAE)-based interpolation method is employed to preserve temporal degradation trends. Subsequently, recurrent neural network (RNN), long short-term memory (LSTM), and gated recurrent unit (GRU) models are applied for SOH prediction. Among them, the GRU model achieves the best performance, with an MAE of 2.24, RMSE of 2.74, and R² of 0.97, demonstrating improved accuracy and robustness under incomplete operational data conditions.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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UCI(KEPA) : I410-151-26-02-096342811