车用动力电池箱夹芯防护结构抗冲击性能仿真  

Simulation of impact resistance of sandwich protective structure for vehicle power battery pack

作　　者：亓昌[1,2] 崔丽萍 王吉旭 裴连政 于晨 杨姝 QI Chang;CUI Liping;WANG Jixu;PEI Lianzheng;YU Chen;YANG Shu(State Key Laboratory of Structural Analysis for Industrial Equipment,School of Automotive Engineering,Dalian University of Technology,Dalian 116024,China;Ningbo Research Institute,Dalian University of Technology,Ningbo 315016,China)

机构地区：[1]大连理工大学汽车工程学院工业装备结构分析国家重点实验室,辽宁大连116024 [2]大连理工大学宁波研究院,浙江宁波315016

出　　处：《振动与冲击》2023年第10期194-202,共9页Journal of Vibration and Shock

基　　金：中央高校基本科研业务费项目(DUT20LAB132,DUT21GF203)。

摘　　要：针对车用动力电池箱底部冲击防护需求,提出三种具有不同芯层构型的夹芯板结构,并对其防护性能进行了数值仿真和量化分析对比。首先,建立了动力电池箱系统典型冲击工况有限元模型,仿真获得了采用均质底板的电池箱系统动态冲击响应并揭示了结构的变形吸能机理;其次,设计了以空心圆管、BRAS结构和叠层仿生鳞片为芯层的电池箱底部夹芯防护结构;进而,以电池轴向压缩量和最大轴向压缩比、防护效果参数和结构总吸能为评价指标,仿真分析了三种夹芯板的抗冲击防护性能,并与均质防护板进行了对比。最终结果表明,BRAS夹芯板具有最佳的抗冲击性能,可用于动力电池箱系统底部防护。According to the impact protection requirements at the bottom of vehicle power battery pack,three sandwich panel structures with different core configurations were proposed,and their protection performance was numerically simulated and quantitatively analyzed and compared.Firstly,the finite element model of typical impact conditions of power battery pack system was established,the dynamic impact response of battery pack system with a homogeneous bottom plate was simulated,and the deformation and energy absorption mechanism of the structure was revealed.Secondly,the sandwich protection structures at the bottom of the battery pack were designed with hollow circular tubes,BRAS structure and laminated bionic scales as the core layer.Furthermore,taking the axial compression and maximum axial compression ratio of the battery,the protection effect parameters and the total energy absorption of the structure as the evaluation indexes,the impact protection performance of the three sandwich panels was simulated and analyzed,and compared with the homogeneous protection panel.The results show that the BRAS sandwich panel has the best impact resistance and can be used for bottom protection of power battery pack system.

关 键 词：车用动力电池 冲击防护 电池箱 夹芯板 电池模组 电池单体 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3