병렬 배터리 팩의 온도 불균형 검출 방법론 연구 (Methodology Study of Temperature Imbalance Detection of Parallel Battery Packs)

서지정보

· 발행기관 : 한국자동차공학회
· 수록지 정보 : 한국자동차공학회 논문집 / 30권 / 2호 / 115 ~ 122페이지
· 저자명 : 홍성곤, 강덕훈, 박성윤, 이평연, 한승윤, 김종훈

초록

As the use of lithium-ion batteries increases, battery management becomes important. Among them, battery temperature management significantly affects the safety and performance of the battery. Studying battery temperature estimation is difficult, as mechanical, electrical, and chemical actions must be considered. It is also tricky to detect when temperature imbalance occurs in a parallel battery pack. In this paper, instead of detecting battery temperature imbalance through temperature estimation, temperature imbalance in a parallel battery pack can be detected through a commonly used battery parameter extraction method. As a way of detecting temperature imbalance in a battery pack, battery internal parameters through the ECM model are used. In this paper, a methodology for detecting non-uniform temperature through internal parameters is also studied. The difference based on the method was studied through parameter extraction by using the HPPC test method and the OCV recovery section. Furthermore, parameters were extracted for each SOC. Through this methodological study, the long-term performance and the safety of the battery can be improved.

영어초록

As the use of lithium-ion batteries increases, battery management becomes important. Among them, battery temperature management significantly affects the safety and performance of the battery. Studying battery temperature estimation is difficult, as mechanical, electrical, and chemical actions must be considered. It is also tricky to detect when temperature imbalance occurs in a parallel battery pack. In this paper, instead of detecting battery temperature imbalance through temperature estimation, temperature imbalance in a parallel battery pack can be detected through a commonly used battery parameter extraction method. As a way of detecting temperature imbalance in a battery pack, battery internal parameters through the ECM model are used. In this paper, a methodology for detecting non-uniform temperature through internal parameters is also studied. The difference based on the method was studied through parameter extraction by using the HPPC test method and the OCV recovery section. Furthermore, parameters were extracted for each SOC. Through this methodological study, the long-term performance and the safety of the battery can be improved.

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