Abstract

This article proposes a liquid-cooled battery thermal management system based on a serial-parallel mini-channel cold plate to solve the problem of severe heat generation during high-rate battery discharge. The numerical simulation method was used to investigate the cooling effects of the bottom margin of the inlet flow channel length (L) and flow channel width (W). The results showed that increasing the L will reduce the standard deviation of the battery pack temperature, but the maximum temperature and maximum temperature difference will decrease at first and then increase. Meanwhile, the increase of the W will reduce the average temperature of the battery pack, but the maximum temperature and maximum temperature difference will increase slightly after the W exceeds a certain value. In addition, the response surface methodology (RSM) was used to analyze the interactive effects of different parameters on the performance of the cooling system and optimize the structural parameters. The RSM predicted results revealed that compared with the original model, the maximum temperature difference and pressure drop of the coolant fell by 15.5 and 34.8%, respectively, which significantly improved the performance of the cooling system.

摘要

本文提出了一种基于串并联微通道冷板的液冷电池热管理系统，以解决电池高速放电时发热严重的问题。采用数值模拟方法研究了入口流道底部边缘长度（L）和流道宽度（W）的冷却效果。结果表明，增大L会降低电池组温度的标准偏差，但最高温度和最高温差先减小后增大。同时，W的增加会降低电池组的平均温度，但W超过一定值后，最高温度和最高温差会略有增加。此外，采用响应面法（RSM）分析不同参数对冷却系统性能的交互影响，优化结构参数。RSM预测结果显示，与原模型相比，冷却剂最大温差和压降分别下降15.5%和34.8%，冷却系统性能显着提高。