关键词: 电池箱体；局部应力；HyperMesh；应力仿真；箱体结构优化

Abstract: As the most critical load-bearing component of the power battery system, the structural stability of the power battery house is crucial to the operation of the vehicle. This paper combines theoretical analysis and finite element simulation analysis to study in detail the influence of three aspects, such as the thickness of the house material, the structure of the house, and the presence or absence of reinforcement plates, on the local stress law and mechanism of the house. The finite element simulation analysis is carried out by HyperMesh software, and four groups of local stress locations and local stress values are obtained. Comparison and analysis of the four groups of local stress simulation results, the direction of the project to effectively reduce the local stress of the house: reasonable structural design can not only make full use of the elastic deformation of the parts themselves to absorb some of the stress, but also can effectively transfer the stress out, as well as increase the thickness of the material at the part of the local stress concentration. The paper also through the optimized battery house for vibration test, the test results prove the optimization direction of reducing local stress, house structure optimization design of the effectiveness and reasonableness, for the follow-up vehicle battery house structure optimization design provides a certain reference basis.

Key words: Battery house; Local stress; HyperMesh; Stress simulation; House structure optimization