Floating Wireless Charging Coil Alignment for Uneven Phone Surfaces
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Solution Overview
Problem
Existing wireless charging devices face inefficiencies due to uneven device surfaces, such as protruding camera modules, which lead to poor fitment and reduced charging efficiency.
Innovation Solution
A wireless charging device with a floating charging assembly, comprising a support plate, a power transmission coil, and a magnetic element, is designed to move within a mounting hole. The magnetic element attracts the device, aligning the support plate to ensure optimal contact and alignment with the power transmission coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the wireless charging device uses a fixed rigid charging surface, then the structure is simple and manufacturing is easy, but devices with protruding surfaces (like camera modules) cannot achieve good contact, reducing charging efficiency
Solution Approach 1:
The charging assembly is designed to be movable rather than fixed, allowing it to dynamically adjust its position and orientation in response to the device being charged. The assembly can move along the normal direction of the charging surface and rotate around an axis, enabling it to adapt to various device surface profiles including protruding camera modules, thereby maintaining optimal charging contact.
Solution Approach 2:
The charging assembly changes its spatial parameters (position and orientation) based on the device characteristics. By allowing movement in multiple degrees of freedom, the system adjusts key parameters such as the distance between the charging coil and device coil, and the angular alignment, to optimize charging efficiency for different device configurations.
2Productivity
If the charging assembly is made movable to adapt to different device surfaces, then charging efficiency improves, but the device complexity and structural difficulty increase
Solution Approach 1:
The charging device is divided into a fixed housing and a movable charging assembly. The charging assembly is further segmented into components that can move independently, such as the support structure and the coil assembly. This segmentation allows the complex adaptive function to be isolated in a separate module, simplifying the overall system architecture while enabling sophisticated movement capabilities.
Solution Approach 2:
A magnetic element is introduced as an intermediary between the charging assembly and the device being charged. This magnetic element not only provides magnetic attraction to hold the device but also serves as a reference for positioning and alignment. The intermediary magnetic element simplifies the control mechanism by providing natural magnetic coupling that guides the movable assembly into the correct position without requiring complex sensors or actuators.
3Productivity
If the support plate is positioned high to ensure contact with protruding devices, then charging efficiency improves, but the aesthetic appearance and flat surface when not in use deteriorates
Solution Approach 1:
The support plate transitions from a static high-positioned structure to a dynamic movable component. When not in use, the support plate retracts to maintain a flat aesthetic appearance. When a device is placed on the charging surface, the support plate moves forward to provide the necessary contact and alignment, thus achieving both aesthetic appeal and functional effectiveness at different times.
Solution Approach 2:
The movable charging assembly is pre-positioned in a retracted state that maintains aesthetic appearance. Upon detection of a device being placed (through weight sensing or other detection mechanisms), the assembly automatically moves to the active position to ensure proper contact. This preliminary positioning allows the device to maintain its aesthetic form while being ready to transition to functional form when needed.
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 design enhances charging efficiency by ensuring precise alignment and minimal distance between the power transmission coil and the device, while also accommodating devices with protrusions and maintaining a flat aesthetic when not in use.
Implementation Method 1
the magnetic element is configured to be attracted to the device to be charged placed on the bearing surface so that outer surface of the support plate is brought into contact with the device to be charged
Implementation Method 2
a power transmission coil and a magnetic element, the support plate is provided with an outer side and an inner side disposed opposite to each other, the outer side of the support plate being configured to be opposite to the device to be charged, the power transmission coil and the magnetic element are arranged at the inner side of the support plate
Data Source
AI summary
A wireless charging device is disclosed. At least one floating charging component is arranged in the wireless charging device, the floating charging component comprises a supporting plate, a power transmission coil, and a magnetic element, the top wall of a housing is provided with at least one mounting hole, and the floating charging component is movably arranged in the mounting hole, so that when the device to be charged is placed on a bearing surface of the top wall, the magnetic element is able to attract the device to be charged so that the outer surface of the supporting plate contacts with the device to be charged, so that ensures that the power transmission coil and the device to be charged be aligned with each other and the distance between them is small, thereby ensuring the wireless charging rate.