Abstract
For low cost and environmental adaptability, the air-cooling system has been widely used as the thermal management system and is being discussed in more and more studies. In this paper, a three-dimensional model of a stagger-arranged IFR-38120 battery pack was firstly established to investigate the effects of different cell-to-cell interval (d), two-roll interval (r), and cell-to-wall interval (s) on battery cooling performance. Then, the reverse-layered stagger-arranged battery pack configuration was optimized by the Design of Experiment method. The simulation results demonstrated that compared to the original configuration, the maximum temperature (Tmax) and maximum temperature difference (ΔTmax) of the optimized reverse-layered stagger-arranged configuration dropped to 310.46 K and 6.60 K, respectively. The corresponding pressure resistance (Δp) and the space utilization factor (α) were 195.66 Pa and 0.484, respectively. Additionally, a 5 × 5 spoiler was added to the optimized model to improve temperature distribution further. Temperature uniformity was further improved with the spoilers on each side, and the ΔTmax of the battery pack decreased by 1.85 K compared with the one without a spoiler.
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