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29권 8호 741-749 2021 [한국자동차공학회 논문집 ]

제목 고용량 리튬이온 배터리의 주파수 응답특성을 반영한 임피던스 기반 온도 추정 연구
분야 전기동력자동차
언어 Korean
저자 최창기(충남대학교), 강덕훈(충남대학교), 한승윤(충남대학교), 김종훈(충남대학교)
Key Words Electric vehicle(전기자동차), Heating factor(발열인자), Temperature(온도), Frequency response characteristic(주파수 응답특성), Heat generation rate(발열량)
초록 Recently, research and development have been actively conducted in order to increase the mileage of electric vehicles(EVs). The performance change of lithium-ion battery, the main power source of EV, is related to battery life. This is directly related to EV mileage. One of the factors affecting the change in battery performance is temperature, and to effectively manage the battery temperature, it is necessary to be able to estimate the temperature. A heating factor is needed to estimate the battery temperature. Since the heating factor extracted through the electrical characteristic experiment that has been studied so far does not reflect the electrochemical change inside the battery, it is impossible to estimate the temperature with high accuracy. Therefore, in this paper, for high-accuracy temperature estimation, we extracted the heating factor reflecting the internal frequency response characteristic of the battery, and used it to derive the heat generation rate in the electrical-thermal analysis.
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