Segmented Ferrite Shielding Module for EV Wireless Power

The shielding sheet is divided into multiple unit blocks (first, second, third, and fourth unit blocks) that can be separately manufactured and then assembled together. This segmentation allows each unit block to be optimized for weight while maintaining the overall large-area coverage needed for power transmission efficiency.

The shielding module uses a composite structure combining ferrite material unit blocks with a magnetic sheet having different magnetic permeability. This composite approach allows the system to achieve the required shielding performance for power transmission while reducing the overall weight compared to a solid ferrite sheet of the same size.

The magnetic sheet is positioned specifically at regions where magnetic field leakage occurs, rather than uniformly across the entire shielding area. This localized placement enhances shielding effectiveness at critical points while minimizing the total metallic material present, thereby reducing eddy current losses and heat generation.

The magnetic sheet acts as an intermediary element between the ferrite unit blocks, targeting specific leakage paths. By intervening only where necessary to block magnetic field leakage, it provides shielding enhancement without the continuous metallic coverage that would cause excessive eddy currents and heat.

The shielding sheet is divided into multiple unit blocks that can be manufactured independently using standard fabrication processes. This segmentation enables parallel production of individual blocks, significantly increasing the mass production rate compared to manufacturing a single large-area shielding sheet as one piece.

Multiple unit blocks are assembled together to form the complete large-area shielding structure. This modular assembly approach allows the system to achieve the required large coverage area for effective shielding while maintaining high productivity through standardized, repeatable assembly processes.