Wireless Charging Coil Thermal Management via Time Division
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Solution Overview
Problem
High-power wireless charging in mobile terminals often leads to overheating, posing security risks and affecting device performance due to excessive heat at the contact surface between the mobile terminal and the charging device.
Innovation Solution
A method and apparatus for controlling N sets of wireless charging coils to perform charging at different times when the temperature exceeds a predetermined threshold, utilizing temperature detection and time division multiplexing to reduce heat buildup, either by stopping charging or reducing operating power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-power wireless charging is used to increase charging speed, then charging efficiency is improved, but the contact surface temperature increases causing overheating
Solution Approach 1:
The wireless charging device divides the charging function into N sets of independent wireless charging coils. When overheating occurs, the control unit can selectively activate different coil sets at different times, distributing the thermal load across multiple components rather than concentrating heat in a single coil, thereby reducing contact surface temperature while maintaining charging functionality.
Solution Approach 2:
The control unit implements periodic charging cycles by alternating between different wireless charging coil sets. When the temperature exceeds the threshold, the system switches between active and inactive states for each coil set, creating periodic charging action that allows thermal dissipation during idle periods while maintaining overall charging progress.
2Productivity
If high-power charging is applied to reduce charging time, then productivity is improved, but security risks increase due to overheating
Solution Approach 1:
The temperature detection unit continuously monitors the contact surface temperature and provides real-time feedback to the control unit. When the temperature exceeds the predetermined threshold, the control unit receives this feedback and automatically adjusts the charging strategy by switching between different wireless charging coil sets, thereby eliminating security risks while maintaining charging efficiency.
Solution Approach 2:
The system dynamically adjusts the charging configuration based on real-time temperature conditions. The control unit can flexibly switch between different wireless charging coil sets depending on which ones are currently within safe temperature ranges, creating a dynamic charging system that adapts to thermal conditions to maintain both speed and safety.
3Ease of operation
If high-power wireless charging is used to enhance user convenience, then ease of operation is improved, but device performance is affected due to overheating
Solution Approach 1:
The wireless charging device performs self-protection by automatically detecting temperature conditions and autonomously switching between different wireless charging coil sets when overheating is detected. This self-service mechanism eliminates the need for user intervention to protect device performance while maintaining the convenience of wireless charging operation.
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 mitigates overheating, enhancing user experience, reducing security risks, and maintaining charging efficiency while ensuring the mobile terminal's performance is not compromised.
Implementation Method 1
a wireless charging device including N sets of wireless charging coils
Implementation Method 2
detecting and determining whether a temperature of a wireless charging device exceeds a predetermined threshold
Data Source
AI summary
A method and an apparatus for wireless charging control, and a storage medium. The method is implemented by a wireless charging device including N sets of wireless charging coils, where N is a positive integer greater than or equal to 2. The method includes controlling the N sets of wireless charging coils to perform charging at different times in response to determining that a temperature of the wireless charging device exceeds a predetermined threshold.