| 摘要: |
| 为解决动力电池工作过程中温度过高的问题，本文基于结构理论提出了一种双层工字形流道液冷板。通过充放电实验建立电池的产热模型，然后利用FLUENT软件建立液冷板的计算流体力学模型。通过正交实验设计研究三个结构参数（长度比、宽度比和流道厚度）对温度和压降的影响，得出最佳组合方案：长度比为0.70、宽度比为0.85、流道厚度为2.5 mm。此外，讨论不同入口速度对液冷板性能的影响。最后，将工字形流道与蛇形流道在相同传热面积和入口速度的条件下进行综合性能对比。结果表明：随着流速的增加，液冷板的最高温度下降了17.493 2 K，表面温度标准差下降了63.4%，最大压力增加了726.789 Pa。工字形流道液冷板的最高温度比蛇形流道液冷板降低了1.333 0 K，表面温度标准差降低了1.386 5 K，压降相比于蛇形流道降低了24.38%。 |
| 关键词: 电池冷却 板式换热器 工字形流道 传热系数 |
| DOI： |
| 投稿时间：2022-10-10 修订日期：2022-12-09
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| 基金项目:国家自然科学基金（51877001）资助项目。 |
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| Numerical Investigation of Battery Thermal Management Using Liquid-cooling Plate Exchanger with I-shaped Flow Channel |
|
He Ping1, Lu Hao1, Fan Yiwei2, Zhang Qiang1, Huang Zezhong1, Zhu Yinfeng1
|
| (1.School of Mechanical and Electrical Engineering, Anhui Jianzhu University;2.Key Laboratory of Metallurgical Equipment and ItsControl, Ministry of Education, Wuhan University of Science and Technology) |
| Abstract: |
| To solve the problem of high temperatures during the operation of power batteries, a double-layer liquid-cooling plate heat-dissipation system with an I-shaped flow channel is proposed based on structural theory. The heat production model of the battery was established through charging/discharging experiments, and the computational fluid dynamics model of the liquid-cooling plate was established using FLUENT software. The effects of three structural parameters (length ratio, width ratio, and channel thickness) on the temperature and pressure drops were investigated using the orthogonal experimental design. The optimal combination of a length ratio of 0.70, width ratio of 0.85, and channel thickness of 2.5 mm was determined. In addition, the effects of different inlet velocities on the performance of liquid-cooling plates were considered. The comprehensive performances of I-shaped and serpentine channels were compared at the constraint of constant heat transfer area and inlet velocity. The results showed that with an increase in the flow rate, the maximum temperature of the liquid-cooling plate decreased 17.493 2 K, the standard deviation of the surface temperature decreased by 63.4%, and the maximum pressure increased by 726.789 Pa. The maximum temperature of the I-shaped flow channel liquid-cooling plate was 1.3330 K lower than that of the serpentine flow channel; the standard deviation of the surface temperature was 1.3865 K smaller, and the pressure drop was 24.38% lower than that of the serpentine channel. |
| Key words: battery cooling plate heat exchanger I-shaped flow channel heat transfer coefficient |
