Electromagnetic Compatibility of Metallic Enclosure of EV Battery Management System Based on FEM

Electromagnetic shielding effectiveness of metallic enclosure influences the EMC performance of EV-BMS (electric vehicle-battery management system). Electromagnetic leakage of electric equipment enclosure caused by apertures is a serious problem. In this chapter, the numerical simulation analysis for electromagnetic shielding performance of enclosure with apertures is performed based on Finite Element Method. Different shapes and orientation of aperture/slot bringing to shielding effectiveness and resonant frequency are analyzed, and analysis of the influence on the shielding performance of the enclosure by the different location of aperture is conducted as well. Meanwhile, some improving counter measures are proposed. By comparing different schemes of BMS metallic enclosure, the chapter provides guidelines for designing the enclosure.