Rollable Multi Wireless Charging Apparatus Using Flexible Substrates
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Solution Overview
Problem
Existing wireless charging apparatuses are bulky and difficult to store or carry, limiting their ability to simultaneously charge multiple devices.
Innovation Solution
A multi wireless charging apparatus is designed with a slim thickness, allowing it to be rolled up, featuring a control unit and multiple wireless charging units connected via flexible substrates with interlayer voids and shielding layers, using double-sided flexible copper clad laminates with adhesive layers and conductive via holes for efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless charging apparatus uses conventional rigid structure, then charging function is stable, but volume becomes large and portability deteriorates
Solution Approach 1:
The patent applies flexible substrates (flexible PCBs) instead of rigid PCBs to construct the wireless charging apparatus. The flexible substrate allows the apparatus to be bent, folded, or rolled into compact forms while maintaining electrical connectivity and charging functionality. This directly resolves the contradiction by enabling portability without sacrificing charging stability.
Solution Approach 2:
The patent introduces flexible hinges and flexible connection structures that allow the apparatus to dynamically change its shape between flat (for charging) and folded/rolled (for storage) states. This dynamic capability enables the apparatus to adapt between operational and portable states, resolving the volume-portability contradiction while maintaining functional reliability.
2Adaptability or versatility
If multiple wireless charging units are integrated, then ability to charge multiple devices simultaneously is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple wireless charging units onto a single flexible substrate, sharing common control circuits, power management components, and structural support. This merging approach enables multi-device charging capability while avoiding the complexity of multiple separate apparatuses, as the shared infrastructure reduces overall system complexity.
Solution Approach 2:
The flexible substrate and control unit are designed to serve multiple functions: supporting various numbers of charging units, accommodating different device types, and providing both charging and structural roles. This multi-functionality allows the apparatus to achieve adaptability for charging multiple devices while maintaining relatively simple overall architecture.
3Stability of the object's composition
If flexible substrates are laminated without interlayer voids, then structural integrity is improved, but manufacturing precision requirements increase and reliability decreases
Solution Approach 1:
The patent intentionally introduces controlled voids or air gaps between certain laminated layers of the flexible substrate. These voids act as stress relief zones that prevent delamination and cracking during bending or folding operations. By strategically placing voids, the patent maintains structural integrity while reducing the precision requirements for lamination alignment and avoiding the reliability issues that would result from perfectly dense bonding.
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 simultaneous wireless charging of multiple devices without mutual interference, with improved reliability and portability due to its compact, rollable design and shielding layers.
Implementation Method 1
Each of the wireless charging units may be further provided with shielding layers made of a flexible conductive material and formed on lower surfaces of the plurality of flexible substrates so as to shield electromagnetic field
Implementation Method 2
An electromagnetic induction type that is excellent in terms of commercialization and practical use among several technologies capable of implementing wireless charging uses electromagnetic energy coupling generated between coils wound several times
Data Source
AI summary
Disclosed herein are a multi wireless charging apparatus and a method for manufacturing the same. The multi wireless charging apparatus includes: a control unit wholly controlling a multi wireless charging process; and a plurality of wireless charging units electrically connected with the control and deformed into a roll form by being bonded so as to a plurality of interlayer voids at the time of laminating a plurality of flexible substrates. By this configuration, the multi wireless charging apparatus can be rolled up in a roll form while having a slim thickness and therefore, can be conveniently carried.