关键词: 电池系统箱体；电动汽车；商用车；结构性能；ANSYS

Abstract: The battery system is the core of the power of electric vehicles, directly determining the vehicle's power and safety performance, and is of great significance to the development of the new energy vehicle industry. The electrification modification of traditional fuel vehicles generally has problems such as irregular battery box structure, insufficient strength and poor universality. Forward development can effectively avoid the above defects. This paper takes the microplanar commercial vehicle power battery box as the research object, aiming to achieve standardized and platform-based design of the box and improve its comprehensive performance. Based on the available space of the entire vehicle, the internal layout is optimized and the protection and structural reinforcement design is completed. Mechanical simulation is carried out using ANSYS. The results show that the rated load of the box is 280 kg and the maximum load is ≤300 kg, meeting the IP67 protection requirements. The maximum stress of random vibration is 70.12 MPa and the maximum stress of mechanical shock is 339.15 MPa. The strength of each key component complies with the GB 38031－2020 standard.This research can provide a reference for the forward development and standardized design of battery boxes for commercial vehicles.

Key words: battery system box; electric vehicle; commercial vehicle; structural performance; ANSYS