Vehicle Floor Panel Power Receiving Coil Alignment via Sub-Frame
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Solution Overview
Problem
Existing contactless power supply systems for vehicles require complex drive control mechanisms and alignment systems to ensure proper alignment of power receiving and supply coils, complicating the charging process.
Innovation Solution
A contactless power supply device with a power receiving portion on the vehicle's floor panel and a power supply portion in the parking space, utilizing magnetic induction for power transfer, where the power receiving coil is aligned with the power supply coil using a sub-frame and extension portions for stability and alignment, eliminating the need for a dedicated drive control system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a movable primary coil is provided on the road and driven to align with the secondary coil on the vehicle, then power transfer alignment is improved, but the system complexity increases due to required drive control mechanisms and detectors
Solution Approach 1:
Instead of making the primary coil movable on the road, the invention makes the secondary coil movable on the vehicle. The secondary coil is mounted on a movable platform that can be positioned to align with the stationary primary coil on the road, thereby inverting the traditional approach and reducing road-side complexity while achieving the same alignment function.
Solution Approach 2:
The secondary coil assembly on the vehicle is designed to be self-aligning through its movable platform mechanism. The platform can be automatically positioned or manually adjusted to align with the primary coil without requiring complex external drive control systems or detectors, allowing the system to self-align through simple mechanical or user-operated means.
2Ease of manufacture
If the power receiving portion is fixed on the vehicle floor panel, then manufacturing simplicity is improved, but alignment capability with the power supply portion deteriorates
Solution Approach 1:
The power receiving portion is designed with dynamic positioning capability. The secondary coil is mounted on a movable platform that can be adjusted in position on the vehicle floor panel, transitioning from a fixed to a dynamic configuration. This allows the system to maintain manufacturing simplicity while gaining the adaptability to align with the primary coil on the road by moving the platform to the appropriate position.
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
Enables easy and cost-effective alignment of power coils during vehicle parking, ensuring efficient and safe electromagnetic induction-based power transfer without the complexity of additional drive control systems, enhancing vehicle operation and safety.
Implementation Method 1
a power supply portion which is provided for a parking space and contactlessly supplies electric power to the vehicle by magnetic connection with the power receiving portion
Data Source
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AI summary
A contactless power supply device including: a power receiving portion (22) which is provided at the center in the vehicle width direction, of a front part of the lower surface of a floor panel (40) of a vehicle (1); a power supply portion (12) which is provided for a parking space (2) and contactlessly supplies electric power to the vehicle by magnetic connection with the power receiving portion (22); a sub-frame (51) provided in a lower part of a front compartment (1F) of the vehicle (1); a motor unit (29U) mounted on the sub-frame (51); and extension portions (53) stiffening fixed portions of the power receiving portion (22), the extension portions (53) being extended from both sides of the rear end of the sub-frame (51) in the vehicle width direction toward the back of the vehicle along both sides of the power receiving portion (22) in the vehicle width direction.