Multi-Pad Wireless Charging Control Under Input Power Limits
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Solution Overview
Problem
Conventional wireless charging transmitters are limited by the input power from external sources, preventing them from supplying sufficient power to multiple electronic devices simultaneously.
Innovation Solution
A wireless charging transmitter system with multiple charging pads, each equipped with a wireless power circuit and a controller that adjusts power transfer based on the presence and type of devices, including authentication procedures to manage power levels, ensuring efficient power distribution among devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the wireless charging transmitter supplies power at the first designated wireless power level to the first electronic device, then the charging speed for the first device is improved, but when a second electronic device is placed on the second charging pad requesting the same or similar amount of power, the total power demand exceeds the input power from the external power device
Solution Approach 1:
The system dynamically adjusts the power transfer level for the first electronic device from the first designated wireless power level to the second designated wireless power level when a second electronic device is detected on the second charging pad. This dynamic adjustment allows the total power consumption to remain within the input power limit while enabling both devices to charge simultaneously, resolving the contradiction between maintaining high charging speed and staying within power supply capabilities.
Solution Approach 2:
The controller changes the power transfer parameter (wireless power level) based on the presence and power requests of multiple electronic devices. When the second device is detected, the system transitions from a single-device high-power mode to a multi-device adjusted-power mode, modifying the power level parameter to ensure the sum of power demands does not exceed the external power device's output capacity.
2Power
If the wireless charging transmitter uses a single charging pad with high power output, then the power supply capability for one device is improved, but the ability to charge multiple devices simultaneously is reduced
Solution Approach 1:
The wireless charging transmitter is divided into multiple independent charging pads (first charging pad and second charging pad), each capable of independently detecting and charging electronic devices. This segmentation allows the system to serve multiple devices simultaneously while the controller coordinates power distribution to ensure the total power consumption remains within the external power device's output limit, thus resolving the contradiction between high power supply capability and multi-device charging versatility.
Solution Approach 2:
Each charging pad is designed with universal functionality to detect and charge various types of electronic devices. The controller manages the power distribution across multiple pads, enabling the system to adapt to different charging scenarios (single device, multiple devices, different power requirements) while maintaining efficient power utilization within the external power device's capacity.
3Productivity
If the wireless charging transmitter allocates maximum power to each detected device, then the charging efficiency for individual devices is improved, but the overall power distribution efficiency among multiple devices deteriorates
Solution Approach 1:
The controller implements a feedback mechanism by detecting the presence of electronic devices on charging pads, receiving power requests from each device, and adjusting the power transfer level accordingly. When multiple devices are detected, the controller receives power requests from both devices, compares the total demand with the external power device's capacity, and adjusts individual power allocation to optimize overall power distribution efficiency while ensuring each device receives adequate charging power.
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
Facilitates stable and efficient wireless charging by determining optimal power levels for each device based on presence, type, and available power, enhancing charging capabilities for multiple devices simultaneously.
Implementation Method 1
a first charging pad including a first wireless power circuit, a second charging pad including a second wireless power circuit
Data Source
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AI summary
One or more disclosed embodiments relate to a wireless charging transmitter and a wireless power transfer method. The wireless charging transmitter includes a first charging pad including a first wireless power circuit, a second charging pad including a second wireless power circuit, and a controller configured to, in response to detection of a first electronic device being placed on the first charging pad, transfer power at a first designated wireless power level via the first wireless power circuit, in response to detection of a second electronic device being placed on the second charging pad, transmit a first command for decreasing power transferred to the first electronic device, and transfer, upon receipt of a first request for power at a second designated wireless power level from the first electronic device in response to the first command, the power at the second designated wireless power level via the first and second wireless power circuits. The disclosure may further include other various embodiments.