Wireless Charger Coil Array for Position-Independent Charging
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Solution Overview
Problem
Conventional contact-less charger systems suffer from inefficient charging due to positional dependencies between primary and secondary coils, leading to reduced charging efficiency and excessive energy waste.
Innovation Solution
A contact-less power supply system featuring a primary coil array with multiple coils arranged in a matrix or zigzag pattern, utilizing a driving mechanism that selectively activates only the coils with feedback responses from the battery, ensuring efficient energy transfer regardless of coil alignment and allowing simultaneous charging of multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single primary coil is used in a contact-less charger system, then the device structure is simple, but charging efficiency decreases when positional offset exists between the primary coil and secondary coil
Solution Approach 1:
The single primary coil is divided into multiple segmented coils arranged in specific patterns (matrix or zigzag). This segmentation allows different coil segments to serve different spatial zones, ensuring that at least one segment maintains optimal magnetic coupling with the secondary coil regardless of positional offset, thereby maintaining charging efficiency while managing structural complexity.
Solution Approach 2:
The patent transitions from a single-point coil configuration to a multi-dimensional array configuration. By arranging coils in matrix patterns (2D grid) or zigzag patterns (interlaced rows), the system creates spatial redundancy across multiple dimensions, ensuring that positional variations in the secondary coil do not result in complete misalignment but rather partial overlap with at least one active coil segment.
2Loss of energy
If multiple coils are arranged alternately or parallel on the same plane to compensate for positional offset, then charging efficiency is maintained, but excessive energy is wasted
Solution Approach 1:
The system implements dynamic coil selection and activation based on real-time detection of secondary coil position and coupling status. Instead of continuously powering all coils, the control system dynamically identifies which coil segments are effectively coupled and activates only those, adapting the operational configuration to match the actual spatial relationship between primary and secondary coils.
Solution Approach 2:
The system incorporates feedback mechanisms to monitor charging efficiency and coil coupling status. Based on this feedback, the control system adjusts which coils are activated, optimizing the balance between maintaining charging efficiency and minimizing energy consumption. The feedback loop enables the system to respond to positional changes and adjust coil activation patterns accordingly.
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 approach enhances charging efficiency by optimizing energy transfer and reducing waste, enabling convenient charging of multiple devices without requiring precise alignment of coils.
Implementation Method 1
a power supply for contactlessly charging a secondary battery device, that is, a battery pack having a secondary coil (210) for inductive coupling
Implementation Method 2
charges a power supply and a battery in a contact-less manner... charge a battery using inductive coupling between a primary coil of a charging body and a secondary coil of a battery pack
Data Source
AI summary
The present invention relates to a contact-less power supply magnetically coupled to a battery device having a receiving coil therein, for contact-less charging the battery device, the contact-less power supply having a sending coil array including a plurality of sending coils for inducing a charging power to the receiving coil; and a driving means for detecting a sending coil magnetically coupled to the receiving coil and selectively driving only the detected sending coil.