Shield Case Load Support Member for Contactless Power Systems
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Solution Overview
Problem
Conventional contactless feed systems face issues with deformation and reduced waterproof performance due to insufficient load support and strength in their shield cases when subjected to vertical loads, which can lead to damage and inefficiencies in power delivery.
Innovation Solution
The implementation of a shield case with a load support member extending from the bottom surface to the cover, where the coil hold member or capacitor protective member doubles as a load support, enhancing the load-bearing capacity and maintaining waterproof performance without increasing the overall weight or thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the shield case is made thinner in vertical direction to reduce weight and size, then weight and compactness are improved, but strength and load-bearing capacity deteriorate
Solution Approach 1:
The shield case is divided into multiple functional parts: a bottom plate, sidewalls, a coil support member, and a cover. The coil support member acts as an internal reinforcement structure that segments the load-bearing function from the main case body, allowing the case walls to be thinner while maintaining overall strength through the distributed support structure.
Solution Approach 2:
The coil support member extends vertically from the bottom plate toward the cover, adding structural strength in the vertical dimension without increasing the horizontal footprint. This dimensional approach allows the shield case to maintain load-bearing capacity while keeping the overall thickness compact.
2Ease of manufacture
If the shield case structure is simplified for easier manufacture, then ease of manufacture is improved, but waterproof performance deteriorates
Solution Approach 1:
The coil support member serves multiple functions simultaneously: it supports the coil assembly, provides structural reinforcement to the shield case, and acts as a mounting structure for electrical components. This merging of functions reduces the number of separate parts needed, simplifying assembly while maintaining waterproof integrity through fewer joints and seals.
3Device complexity
If the coil support member is designed only for coil support, then device complexity is reduced, but load-bearing capacity deteriorates
Solution Approach 1:
The coil support member is designed as a multi-functional component that simultaneously supports the coil assembly, reinforces the shield case structure against vertical loads, and provides mounting points for electrical connections. This universal design allows a single structure to handle multiple tasks without increasing overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration ensures efficient power delivery while maintaining environmental resistance, strength, and waterproofing, preventing deformation and damage to the shield case components, even when subjected to vertical loads.
Implementation Method 1
An electromagnetic shield material is stuck on the electromagnetic shield case 190, and a low impedance substance such as a slim copper foil is used as the electromagnetic shield material. The electromagnetic shield case 190 prevents an electromagnetic field generated by the secondary self-resonant coil 110 and a primary self-resonant coil 240 from leaking toward a vehicle side.
Data Source
AI summary
There is provided a shield case allowing efficient power delivery while ensuring environmental resistant such as strength and waterproof and provided a contactless feed system using the shield case.A contactless feed system includes: a feed-side device installed in a fixed body; a receive-side device installed in a mobile body and fed electric power from the feed-side device in a contactless manner, and a shield case used in the feed-side device of the contactless feed system includes: a case open toward the receive-side device; a coil housed in an interior of the case; and a cover covering an opening of the case, wherein a load support member extending from a bottom surface of the case to an inner surface of the cover is provided inside the case.