Wireless Power Pad Resin Frame and Grout Insulation
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Solution Overview
Problem
The existing power transmission pads for wireless charging of electric and hybrid electric vehicles, embedded in cement or similar materials, suffer from insulation degradation due to aging, leading to high maintenance costs as the pads need to be repeatedly replaced to maintain effective insulation performance.
Innovation Solution
A power transmission apparatus featuring a cast resin frame embedded in the ground, with a base structure and grout, where the cast resin frame is used to house the power transmission pad and coil, preventing cracks and ensuring consistent insulation, and the grout is used to fill gaps, preventing damage from external factors like heat and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the power transmission pad is embedded in cement or similar materials, then the pad is protected from external damage, but cracks occur due to aging degradation leading to insulation performance deterioration
Solution Approach 1:
The patent uses a composite structure consisting of a resin material layer and a cementitious material layer. The resin material provides flexible protection against cracking while the cementitious material provides structural support and protection from external damage. This composite approach resolves the contradiction by combining materials with complementary properties to maintain both protection and insulation performance over time.
2Strength
If cement or similar materials are used as protectors, then structural support is provided, but aging degradation causes cracks and requires frequent removal and re-embedding
Solution Approach 1:
The patent employs a composite structure with resin material and cementitious material working together. The resin layer prevents cracking while the cementitious layer provides structural support, thereby extending the service life of the power transmission pad embedding without requiring frequent maintenance or re-embedding.
Solution Approach 2:
The resin material layer acts as a cushioning layer that prevents cracks from forming in the cementitious material due to thermal expansion, contraction, and other environmental factors. This beforehand cushioning effect maintains the integrity of the embedding structure over time, extending service life without maintenance.
3Power
If high voltage is applied to the power transmission pad, then wireless charging function is achieved, but insulation performance degradation occurs due to cracking
Solution Approach 1:
The composite structure of resin material and cementitious material provides both the mechanical protection needed to prevent cracks and the insulation properties required for high-voltage wireless charging. The resin layer specifically maintains insulation performance by preventing crack formation while allowing the system to operate at high power levels.
Data Source
AI summary
A power transmission apparatus includes a power transmission pad, a base structure, and grout. The power transmission pad for wireless power transmission has a cast resin frame, at least part of the cast resin frame being embedded in the ground. The base structure is disposed below the power transmission pad. The grout is filled around the power transmission pad, including a gap between an upper surface of the base structure and the power transmission pad.