锂离子电池组风冷散热结构的优化

建立锂离子电池组风冷结构初始模型,采用计算流体力学(CFD)理论,用Fluent软件进行温度场和流场仿真。根据仿真结果,考虑进风角度、出风角度和电池间距等3种因素,基于正交试验进行多目标优化。以电池组最高温度和温差的最小化作为目标,经多次迭代计算,得出局部最优方案:进风区域左端高度为9 mm(进风角度2. 74°),出风口高度为28 mm(出风角度2°),电池间距公差值为0. 4 mm。与初始模型相比,优化模型的电池组最高温度降低9. 55%,温差下降25. 89%。

Optimization of structure of air cooling heat dissipation for Li-ion batteries

The initial model of the air cooling structure of Li-ion batteries was established.The temperature field and flow field were simulated by CFD theory and Fluent software.According to the simulation results,the multi-objective optimization based on orthogonal test was adopted,considering the three factors of air inlet angle,air outlet angle and battery spacing.Taking the maximum temperature and the minimum temperature difference of the batteries as the optimization objectives,the local optimal scheme of the air cooling heat dissipation structure of the batteries was obtained through multiple iterations.The left side height of the air inlet area was 9 mm(inlet angle was 2.74°),the air outlet height was 28 mm(outlet angle was 2°),the tolerance value of battery spacing was 0.4 mm.Compared with the initial model,the maximum temperature and the temperature difference of the batteries in the optimization model were reduced by 9.55%and 25.89%,respectively.