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배터리냉각시스템 냉각성능 예측을 위한 열전달 모델 개발
임혜수(Hyesu Lim),김화성(Hwasung Kim),공태윤(Taeyun Kong),박근서(Keunseo Park),김충영(Chungyoung Kim),권태석(Taesuk Kwon) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
In recent years, high-voltage batteries of electric vehicles have been in the spotlight as high-efficiency cooling technology capable of coping with high cell heating as high output and large capacity are inevitable due to an increase in travel distance and shortening of rapid charge time. Battery cooling technology of next-generation electric vehicles is changing between indirect-refrigerant based cooling using water-glycol coolant as cooling fluid and direct-refrigerant cooling type. It is important to predict cooling performance and battery cell temperature distribution to develop new battery cooling system. In this paper, 1D analysis model based on thermal resistance network method was developed through EES(Engineering Equation Solver) and system cooling load, cell temperature distribution, and outlet condition of cooling fluid were confirmed. As a result, the error between test data and the analytical model was within 12% at maximum, and it was confirmed that direct-refrigerant cooling reaches target temperature compared to that of indirect cooling.
1D 해석을 통한 배터리 냉각 시스템 성능에 관한 연구
박근서(Keunseo Park),임혜수(Hyesu Lim),공태윤(Taeyun Kong),김화성(Hwasung Kim),김충영(Chungyoung Kim),권태석(Taesuk Kwon) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
An investigation on battery cooling system has been conducted using 1D simulation. Commercial Software, KULI, is used for estimation of cooling performance with various battery conditions in this study. For investigation of the battery cooling system, some 1D modeling had been developed and various parametric studies had been conducted. Some specific current values according to driving condition were engaged in the simulation model to estimate cooling performance of this system. The simulations indicate that current cooling system meet the target (under 45℃) when driving conditions like US06, HW and the fastest speed mode and that environmental temperature is also can be critical design factor since an effect of natural convection was pretty critical when we consider natural convection.