Wireless Charger Cradle Coil Positioning Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery charger cradles face issues with inefficient charging due to misalignment, increased thickness for positioning features, and heat generation when metallic elements are present, which hinder efficient and safe charging of built-in batteries.
Innovation Solution
A battery charger cradle with a movement mechanism and position detection controller that adjusts the primary coil's position relative to the induction coil to ensure efficient electromagnetic induction, allowing charging regardless of device alignment and preventing heat generation from metallic elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a positioning protrusion and positioning recess structure is used to ensure alignment, then charging reliability is improved, but device thickness increases and portability deteriorates
Solution Approach 1:
The patent removes the positioning protrusion and positioning recess structures from the battery built-in device, extracting the alignment function to the charging cradle side only. This allows the battery pack to be thin and portable while maintaining charging reliability through the cradle's positioning mechanisms.
Solution Approach 2:
Instead of providing positioning features on both the cradle and battery pack, the patent inverts the approach by providing positioning protrusions on the cradle and positioning recesses only on the battery pack bottom, making the battery pack thinner while maintaining alignment capability.
2Ease of manufacture
If the primary coil is fixed in position, then manufacturing simplicity is maintained, but charging efficiency deteriorates when devices are misaligned
Solution Approach 1:
The patent makes the primary coil movable rather than fixed, allowing it to dynamically adjust its position to align with the induction coil on the battery pack. This movement capability enables efficient electromagnetic induction regardless of initial device placement while maintaining reasonable manufacturing complexity.
3Ease of operation
If electromagnetic induction is used for wireless charging, then ease of operation is improved, but heat generation from metallic elements becomes a harmful factor
Solution Approach 1:
The patent detects metallic elements that cause harmful heat generation and converts this harmful effect into a useful detection signal. By monitoring changes in electromagnetic induction characteristics caused by metallic objects, the system can identify their presence and take appropriate measures to prevent overheating.
Solution Approach 2:
The patent incorporates a detection mechanism that provides feedback about metallic element presence to the control system. This feedback loop allows the system to adjust operation parameters or alert users when metallic objects are detected, preventing harmful heat generation while maintaining wireless charging convenience.
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 efficient and safe charging of batteries across various positions and device types, maintaining thinness for portable devices while preventing heat generation from metallic interference.
Implementation Method 1
electric power is carried from a primary coil to an induction coil (a secondary coil) by the effect of electromagnetic induction
Data Source
AI summary
In a battery charger cradle, a battery incorporated in a battery built-in device is charged by electric power induced to an induction coil. The cradle includes a primary coil for inducing electromotive force to the induction coil, a casing having a top plate atop of which the battery built-in device is placed, a movement mechanism for moving the primary coil along an inner surface of the top plate, and a position detection controller for detecting a position of the battery built-in device placed on the top plate and controlling the movement mechanism to bring the primary coil closer to the induction coil in the battery built-in device. When the battery built-in device is placed on the top plate, the position detection controller detects the position of the battery built-in device, and the movement mechanism moves the primary coil closer to the induction coil in the battery built-in device.