锂离子动力电池包CFD仿真

针对电动汽车锂离子电池包设计过程中需要注意的散热问题,通过对某电池包模块的几何模型进行简化建立相应的计算模型,通过FLUENT仿真,从多个角度分析不同设计方案对电池包散热性能的影响.通过对仿真结果的对比和分析,发现随着电池包进口风速的增加,电池包的散热性能逐步提升;但超过一定速度后,进一步提升进口风速对电池散热性能的提升效果有限.电池叉排比顺排散热性能要好;随着电池间距的增加,电池包的散热性能随之提升,且改变纵向间距对散热性能的影响大于改变横向间距;边界距离对电池包散热性能的影响较大,距离的减小能提升电池包的散热性能.

CFD simulation on lithium-ion power battery pack

As to the heat dissipation issues in the design process of lithium ion power battery pack of electric vehicles, a computational model is built by simplifying the geometric model of a battery pack module, and the heat dissipation performance of different design schemes of battery packs is analyzed by FLUENT simulation from multiple aspects. The comparison and analysis on simulation results show that the performance of heat dissipation on battery packs is gradually improved with the increase of inlet velocity, but when the velocity exceeds a certain value, no apparent improvement of heat dissipation performance of battery packs occurs. The performance of heat dissipation on staggered battery packs is better than that on aligned battery packs; the heat dissipation performance of battery packs can be improved by increasing battery spacing, and the effect of vertical battery spacing on heat dissipation performance is larger than that of lateral battery spacing; the boundary distance has a significant effect on heat dissipation performance of battery packs, and the decrease of boundary distance can improve the heat dissipation performance of battery packs.