Abstract: To address the long charging time of battery electric vehicles, a mechanical battery quick-swap mechanism that allows for fast and convenient battery pack replacement has been developed. Using ANSYS Workbench software, the article establishes a finite element model of the mechanism and conducts static mechanical analysis and modal analysis for scenarios such as emergency braking, steering, and bumpy roads. The results of the static analysis indicate that the maximum stress of each component under the three road conditions is less than the material yield strength, satisfying the strength design requirements. The modal analysis results show that the frequencies generated by the three externals excitation deviate from the natural frequency of the mechanism, thus preventing resonance during driving. The research findings provide a theoretical reference for the design and optimization of the battery swap mechanism.

Key words: Battery electric vehicle; Battery quick change device; Finite elements analysis; Static analysis; Modal analysis

摘要： 针对纯电动汽车充电时间长的问题，研发了一个可快速、方便进行电池包更换的机械 式电池快换机构。文章运用 ANSYS Workbench 软件，建立了该机构的有限元模型，并针对紧 急制动、转向和颠簸路面等工况进行了静态力学分析和模态分析。静力学分析的结果表明， 各部件在三种路况下的最大应力均小于材料屈服强度，满足强度设计要求。模态分析的结果 表明，三种外部激励所产生的频率与机构固有频率发生偏离，因此在行车时不会产生共振现 象。研究结果为电池快换机构的设计以及优化提供了一定的理论参考依据。

关键词: 纯电动汽车；电池快换机构；有限元分析；静力学分析；模态分析