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.

By using the Babinet modeling theory and the finete element simulation software,the problem of slot radiation of enclosure is discussed.Firstly,the factor of the slot with different aspect ratio on radiation is analyzed,and that with different locations is analyzed too.Secondly,the method of inhibiting slot radiation is studied.

This paper presents a numerical simulation method based on FDTD algorithm to solve long testing period and complex process of SAR measurement. Dipole antenna and Flat Phantom were modeled. Simulation was done in the range of 300MHz to 3GHz. The simulation result was compared with IEEE-1528 reference value and error sources were analyzed. The result indicates the feasibility of numerical simulation method based on FDTD algorithm.