Power Receiving Coil with Nonparallel Opening for Flexible Wireless Charging
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Solution Overview
Problem
Existing wireless power transmission systems face complexity, increased costs due to multiple wirings and control devices, and limited configurational freedom due to specific positional requirements between power feeding and receiving devices, which restricts their application and efficiency.
Innovation Solution
A power receiving device and power feeding device configuration that allows magnetic flux to interlink through multiple surfaces using a planar or curved coil with protruding portions, enabling power transmission across various surfaces without the need for multiple coils, thus simplifying wirings and reducing control devices, while allowing for flexible device positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power feeding side coils and power receiving side coils are provided to enable optional configuration regardless of positional relation, then configurational freedom is improved, but device complexity and cost increase due to increase in numbers of wirings and control devices
Solution Approach 1:
A single power receiving coil is designed with a nonparallel opening portion that can receive magnetic flux from power feeding coils positioned at multiple different locations. This allows the same coil structure to serve multiple receiving functions without requiring separate coils for each position, thereby reducing device complexity while maintaining configurational freedom
Solution Approach 2:
The opening portion of the power receiving coil is configured with a nonparallel structure that extends in multiple directions, enabling the coil to detect and receive magnetic flux from power feeding coils positioned at various locations. This dimensional extension allows one coil to replace multiple coils, reducing the number of wirings and control devices needed
2Reliability
If a curved induction coil is built-in and the portable device is back surface-curved to follow the shape of the induction coil, then positional offset between induction coil and source coil is inhibited, but configurational freedom is limited as charging cannot occur if a surface other than the surface opposite to the induction coil faces the charger
Solution Approach 1:
The opening portion of the power receiving coil is divided into multiple directional faces that can independently detect and receive magnetic flux from power feeding coils positioned at different locations. This segmentation allows the coil to maintain reliable power reception from various positions without requiring the entire device to be precisely aligned, thereby maintaining configurational freedom while ensuring positional alignment
3Loss of energy
If the primary coil and secondary coil are configured at specific portions and positioned opposite to each other, then power transmission efficiency is improved, but configurational freedom is reduced as specific portions need to be opposite when charging
Solution Approach 1:
The power receiving coil is designed with a dynamic, nonparallel opening portion that can adaptively detect and receive magnetic flux from power feeding coils positioned at various locations. This dynamic structure maintains high power transmission efficiency by optimizing magnetic flux reception from different positions, eliminating the need for fixed opposite positioning while preserving configurational freedom
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 enhances power transmission efficiency and user convenience by allowing flexible configuration of devices, reducing size and complexity, and maintaining high power transfer efficiency across different surfaces.
Implementation Method 1
a power receiving device to which power is transmitted wirelessly from a power feeding device comprising a power feeding coil
Data Source
AI summary
A power receiving device and power feeding device improve convenience of the user by increasing the freedom of configuring the power receiving device with respect to the power feeding device and freedom of configuring the power feeding device with respect to the power receiving device, and inhibit large size of machines. The power receiving device includes: plurality of surfaces; and inside a power receiving coil, and the power receiving coil includes: a winding portion with wires wound; and an opening portion surrounded by the winding portion and having two opposite opening ends. By disposing the power receiving coil so an end face of at least one of the two opening ends is nonparallel (excluding perpendicular) to two or more surfaces of the power receiving device, a power receiving area capable of receiving power from the power feeding device formed on the two or more surfaces of the power receiving device.