混合动力车电池模组冷却结构优化

Cooling Structure Optimization of Battery Module for Hybrid Electric Vehicle

摘要:

通过对混合动力车电池箱并行结构的改进，改善了原有并行通风结构的进风不均匀性，达到对电池模组前后表面冷却的目的.按照进风形式和流道结构的不同，设计了楔形、梯形和圆孔挡板3种进风结构，圆孔挡板结构均匀进风效果最佳.对圆孔挡板结构进行冷却维度改进，设计了平行冷却和垂直冷却2种方式.结果表明:双流道、 垂直冷却结构较优，在中低放电倍率和环境温度小于30 ℃的情况下，出口流速为6 m?s-1、电池间隙为4～6 mm时散热效果最佳.

Abstract:

In this paper, the parallel ventilation structure of battery box for hybrid electric vehicle is improved by optimizing the original parallel ventilation structure. Uniform cooling between the front surface and the rear surface of battery can be ensured. According to the air inlet mode and flow path structure, three kinds of structures, i.e., wedgeshaped structure, trapezoid structure and circular hole baffle structure, are designed. It is shown that the circular hole baffle structure is the best. Meanwhile, the structure of the circular hole baffle is improved in cooling dimension. Parallel cooling and vertical cooling are demonstrated. The results show that the dualchannel vertical cooling structure is the better. In the condition of ambient temperature less than 30 ℃, cooling effect is the best at medium and low discharge status when the outlet flow velocity is 6 m?s-1 and the battery gap is 4 ~ 6 mm.