Park Seokjun, Lee Hamin, Park Cheonha, Kim Chang-Wan
Graduate School of Mechanical Engineering, Konkuk University, Seoul, 05029, Republic of Korea.
School of Mechanical Engineering, Konkuk University, Seoul, 05029, Republic of Korea.
Heliyon. 2024 Oct 11;10(20):e39220. doi: 10.1016/j.heliyon.2024.e39220. eCollection 2024 Oct 30.
In real-world driving scenarios of electric vehicles, the C-rate fluctuates with changes in speed, and a Battery Thermal Management System (BTMS) design that does not account for a range of C-rates may fail to ensure thermal safety of the battery. In this study, we statistically analyzed the effects of cooling plate geometry and coolant velocity on battery thermal behavior using Design of Experiments (DoE) and Analysis of Variance (ANOVA) across various C-rates. The ANOVA results by C-rate demonstrate that the influence of design factors on BTMS thermal behavior varies with the C-rate. Specifically, at 0.5C, the percentage contribution of the cooling plate outer width to the temperature difference is 41.56 %, whereas at 3C, it is reduced to 39.41 %. Conversely, the percentage contribution of the cooling plate outer height to the temperature difference increases from 6.88 % at 0.5C to 9.13 % at 3C. These findings suggest that to ensure the thermal safety of the BTMS, it is crucial to consider the thermal behavior under various C-rate conditions during the design process.
在电动汽车的实际驾驶场景中，充放电倍率会随速度变化而波动，而未考虑充放电倍率范围的电池热管理系统（BTMS）设计可能无法确保电池的热安全性。在本研究中，我们使用实验设计（DoE）和方差分析（ANOVA），在不同的充放电倍率下，对冷却板几何形状和冷却液流速对电池热行为的影响进行了统计分析。不同充放电倍率下的方差分析结果表明，设计因素对BTMS热行为的影响随充放电倍率而变化。具体而言，在0.5C时，冷却板外部宽度对温差的贡献率为41.56%，而在3C时，该贡献率降至39.41%。相反，冷却板外部高度对温差的贡献率从0.5C时的6.88%增加到3C时的9.13%。这些发现表明，为确保BTMS的热安全性，在设计过程中考虑各种充放电倍率条件下的热行为至关重要。
