保温棉对动力电池包上盖振动响应影响仿真研究
2021-10-20丁志友高超田艳妮
丁志友 高超 田艳妮


摘要:本文利用有限元仿真前处理软件Hypermesh进行了动力电池包的建模,并进行了线性动力学随机振动分析求解,计算得出有保温棉电池包与没有保温棉电池包相比,上盖振动响应降低约10%。通过振动台台架试验,验证了电池包有保温棉和没有保温棉的情况下,上盖监测点振动响应降低约7.1%。仿真结果与试验数据较为吻合,可对电池包上盖缓振设计提供设计参考。
Abstract: In this paper, the FEM simulation software HyperMesh was used to model the battery pack, and the random vibration analysis was solved. It is calculated that the vibration response of the cover of the battery pack with insulation cotton is reduced by about 10% compared with that of the battery pack without insulation cotton in the random vibration analysis process. Through the vibration test, it is verified that the vibration response of the monitoring point on the cover decreases by 7.1% under the condition of the battery with or without the insulation cotton. Comparing test with the simulation the results were in good agreement. The simulation results are in good agreement with the experimental data, which can provide reference for the isolation-buffer design of the battery pack cover vibration.
關键词:保温棉;动力电池包;振动响应;仿真
Key words: the thermal insulation cotton;battery pack;vibration response;simulation
中图分类号:U469.72 文献标识码:A 文章编号:1674-957X(2021)20-0031-03
0 引言
在全球能源危机的不断加深和石油资源的日趋枯竭的今天,各国政府及汽车企业普遍认识到节能减排是未来汽车技术发展的重要方向[1]。纯电动汽车中最重要的核心部件是动力电池包,由于其“体积大、重量大”[2],电池包布置在前后地板下方较为可行[3],并通过螺栓等连接方式连接在底盘上。
车辆在行驶中路面的激励可能导致上盖出现振动响应,进而拍击车身地板,发出异响。目前一个较为常见的方法为在电池包内部,上盖和模组之间增加一层保温棉。
保温棉是一个双面无纺布、中部填充PP或者其他材料的柔软结构,被广泛用在需要隔热保温的场景中。也因其具有一定的弹性可以在一定程度上降低上盖的振动响应被应用在动力电池中。但是长久以来,工程设计对保温棉厚度、硬度等参数的设计主要依靠经验,对缓振效果缺乏定量的分析。通过仿真手段可以对……
