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전기자동차용 배터리의 수명 예측을 위한 열전달 모델 개발
정융(Yoong Jung),김귀택(Gwitaek Kim),김선진(Sunjin Kim),김민수(Min Soo Kim) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
Temperature of lithium-ion battery has a huge impact on battery life and performance. Thus, it is important to properly manage the battery cooling system to maintain target battery temperature. In this paper, a numerical model for battery pack and its cooling system for battery electric vehicle(BEV) is developed. In this model, battery stack of 50 kWh capacity is cooled by coolant flow through the fin-assisted cooling plate. The model calculate the temperature change of battery stack under several design and operation factors. Predicted battery life is suggested according to the simulation results.
최종민(Jongmin Choi),김귀택(Gwitaek Kim),김선진(Sunjin Kim),정융(Yoong Jung),김민수(Min Soo Kim) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
In this study, semi lumped parameter thermal modelling is developed for transient analysis of 4 kW TEFC(totally enclosed fan cooled) induction motor. In order to validate the method, the previous experimental and analytic results using lumped parameter thermal modelling is adopted from Amar Bousbaine (1993). Various heat transfer coefficient correlations are chosen for this modelling, which are from literatures and widely applied for heat transfer analysis accompanying with the laminar or turbulent flow around electric motors. The results show comparatively similar tendency except for stator and end cap air region, which are limited in calculation due to complicated heat transfer mechanism nearby and intrinsic simplicity of semi lumped parameter thermal modelling.