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18650 Li-ion battery Module의 Cell-to-Cell 온도 편차 최소화를 위한 양방향 냉각에 대한 실험적 연구
장호선,박민규,전지환,박성수,김태우,박성진 한국수소및신에너지학회 2017 한국수소 및 신에너지학회논문집 Vol.28 No.4
Battery heat management is essential for high power and high energy battery system because it affects its performance, longevity, and safety. In this paper, we investigated the temperature of the 18650 Lithium Ion Battery Module used in a Energy Storage System (ESS) and the cooling method to minimize cell-to-cell temperature variation of battery module. For uniform temperature distribution within a battery module, the flow direction of the coolant in a battery module has been changed according to the time interval, and studied the effect of the cooling method on the temperature uniformity in a battery module which includes a number of battery cells. The experimental results show that bi-directional battery cooling method can effectively reduce the cell-to-cell temperature variation compared with the one-directional battery cooling. Furthermore, it is also found that bi-directional battery cooling can reduce the maximum temperature in a battery module.