Modular Wireless Charging Pad Using Coupling-Based Coil Activation
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Solution Overview
Problem
Wireless chargers with multiple built-in transmitter coils are large and inconvenient to carry, making them unsuitable for simultaneous charging of multiple devices without occupying excessive space and power sockets.
Innovation Solution
A wireless charging device with a charging pad comprising multiple interconnected charging units, where a controller determines the charging method based on electromagnetic coupling strengths between adjacent units to efficiently charge devices without blind spots, allowing for flexible and compact charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a wireless charger with multiple built-in transmitter coils is used to simultaneously charge multiple electronic devices, then the charging capacity and productivity are improved, but the device size and volume increase, making it inconvenient to carry
Solution Approach 1:
The wireless charging system is divided into multiple independent charging units, each capable of charging one device. These modular units can be used separately or combined together, allowing the system to scale charging capacity from 1 to N devices without requiring a single large charger, thus maintaining portability while improving productivity
Solution Approach 2:
Each charging unit is designed to be universally applicable and can function independently or in combination with other units. The same charging unit can serve multiple purposes - as a standalone charger or as part of a multi-device charging array, providing multi-functionality that resolves the contradiction between charging capacity and device size
2Productivity
If multiple wireless chargers are used to simultaneously charge multiple electronic devices, then the charging capacity is improved, but the device complexity and the number of components increase, affecting user experience
Solution Approach 1:
Multiple charging units are merged into a single integrated system with shared control and power management. The controller coordinates all charging units and communicates with multiple devices simultaneously, reducing the overall system complexity compared to using separate wireless chargers while maintaining the ability to charge multiple devices
3Productivity
If a wireless charger with multiple transmitter coils is used, then the charging capacity is improved, but the power consumption and energy use increase
Solution Approach 1:
The system dynamically activates only the charging units that are currently needed based on device detection and placement. The controller monitors the charging state and power consumption in real-time, dynamically adjusting which units are active to minimize energy waste while maintaining the capacity to charge multiple devices when needed
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
The solution enables efficient and compact wireless charging of multiple devices by optimizing the use of charging units and reducing the need for multiple power sources, enhancing user experience and convenience.
Implementation Method 1
Direct-current low-voltage electric energy that is converted from alternating-current electric energy of a power grid and that is transmitted by a power adapter 200 by using a power cable 300 is transferred to a to-be-charged electronic device according to an electromagnetic induction principle through coupling between a receiver coil in the to-be-charged electronic device and the transmitter coil in the wireless charging platform 101
Data Source
AI summary
A wireless charging device is disclosed, which includes: a charging pad and a first controller. The charging pad includes a plurality of charging units, the plurality of charging units include a first charging unit and a second charging unit. When a first electromagnetic coupling strength between the first charging unit and the to-be-charged device is greater than or equal to a first threshold, the first controller is configured to control the first charging unit to separately charge the to-be-charged device. When both the second electromagnetic coupling strength between the second charging unit and the to-be-charged device and the first electromagnetic coupling strength are less than a first threshold, and are greater than or equal to a second threshold, the first controller is configured to control the first charging unit and the second charging unit to jointly charge the target to-be-charged device.