Dynamic Sub-Coil Turn Adjustment for Wireless Charging Thermal Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The development of wireless fast charging technology is limited by the temperature rise in terminal devices during charging, primarily due to the high impedance of coils with multiple turns, which leads to increased energy consumption and heat generation.
Innovation Solution
The implementation of an electronic device and wireless charging method that adjusts the number of turns of sub-coils in the receiving and transmitting coils based on the strength of magnetic coupling, using switch modules controlled by a control module to optimize impedance and reduce temperature rise while maintaining charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of turns of the coil is increased to implement wireless charging, then the charging function is achieved, but the impedance of the coil increases leading to more energy consumption and heat generation
Solution Approach 1:
The patent applies dynamics by making the coil structure adjustable rather than fixed. The coil can dynamically change its number of effective turns through switching between different winding configurations (single-layer, multi-layer, or partial activation of coil segments). This dynamic adjustment allows the system to optimize between charging efficiency and heat generation based on real-time operating conditions, resolving the contradiction between achieving wireless charging function and controlling coil temperature.
2Reliability
If the number of turns of the coil is increased to implement wireless charging, then the charging function is achieved, but the impedance of the coil is larger leading to more energy consumption
Solution Approach 1:
The patent implements dynamics by enabling the coil to adapt its configuration in real-time. The system can switch between different numbers of effective turns (e.g., using all turns when coupling is strong, or fewer turns when coupling is weak) to optimize energy efficiency. This dynamic adjustment resolves the contradiction by allowing the coil to use only the necessary number of turns for effective charging, reducing unnecessary energy consumption while maintaining the wireless charging function.
3Productivity
If wireless fast charging technology is developed to shorten charging time, then charging efficiency is improved, but temperature rise in terminal devices cannot be tackled
Solution Approach 1:
The patent resolves this contradiction through dynamic adjustment of the coil configuration during fast charging operations. The system can rapidly switch between different coil turn configurations to maintain optimal charging power while controlling temperature rise. When temperature exceeds thresholds, the system dynamically reduces effective turns to lower power and heat generation, yet maintains fast charging capability when conditions permit, thus achieving both high charging speed and temperature control.
Solution Approach 2:
The patent implements feedback mechanisms to monitor temperature and charging status in real-time, then adjusts the coil configuration accordingly. The control system receives feedback about temperature levels and coupling strength, and dynamically modifies the number of effective turns to maintain fast charging while preventing excessive temperature rise. This closed-loop control resolves the contradiction between charging speed and temperature management.
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 effectively reduces temperature rise and charging loss while ensuring fast charging efficiency by dynamically adjusting the number of active sub-coil turns in response to magnetic coupling strength between the coils.
Implementation Method 1
strength of magnetic coupling between the receiving coil and a transmitting coil of a wireless charging device
Data Source
AI summary
An electronic device, a wireless charging device and a wireless charging method, which belong to the technical field of charging. The electronic device comprises: a receiving coil, a receiving circuit, a first switch module and a first control module, wherein the first control module is used for controlling, according to a related parameter for the magnetic coupling strength between the receiving coil and a transmitting coil of a wireless charging device, the turning on and off of at least two first switches in the first switch module, so as to adjust the number of turns of subcoils in the receiving coil that effectively work.