Modular Wireless Charging Pad With Coupling-Based Coil Switching
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Solution Overview
Problem
Wireless chargers designed to charge multiple devices simultaneously are bulky and inconvenient to carry, leading to disorganized power usage and user experience issues.
Innovation Solution
A wireless charging device with interconnected charging units that determine optimal charging configurations based on electromagnetic coupling strengths between adjacent units and devices, allowing for efficient charging without blind spots and enabling convenient portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a wireless charger with multiple built-in transmitter coils is used to charge multiple devices simultaneously, then the number of power adapters and cables is reduced, but the device size becomes large and inconvenient to carry
Solution Approach 1:
The charging system is divided into multiple independent charging units, each with its own transmitter coil. These modular units can be used independently or combined together, allowing the charging capacity to be segmented and scaled according to actual needs without requiring a single large charger.
Solution Approach 2:
Each charging unit is designed to be universally applicable and can function both as a standalone charger and as part of a combined multi-unit system. The charging units share common power supply interfaces and control protocols, enabling them to serve multiple purposes: individual charging, simultaneous charging of multiple devices, and flexible configuration options.
2Reliability
If multiple wireless chargers are configured to charge multiple devices simultaneously, then each device can be charged independently, but power sockets become insufficient and the chargers look disordered
Solution Approach 1:
Multiple charging units can be physically connected and merged into a unified charging system through extension ports. When connected, the units share a common power supply and coordinate their charging operations under unified control, eliminating the need for multiple separate power adapters and cables, and presenting an organized, integrated appearance.
Solution Approach 2:
The charging system dynamically adapts its configuration based on the number of devices being charged. The controller can selectively activate individual charging units or combine them, and can dynamically adjust power distribution among connected devices. This dynamic flexibility allows the system to maintain orderliness while accommodating varying charging needs.
3Volume of moving object
If a single charging unit is used, then the device size remains small and portable, but charging coverage has blind spots and cannot efficiently charge multiple devices
Solution Approach 1:
Charging units are designed with nested extension capabilities, where additional charging units can be attached to expand the charging area. The base unit contains essential charging components, and extension units can be nested or connected to it, creating a scalable charging system that grows with the charging needs while maintaining portability when used in its compact base form.
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
Ensures efficient charging of multiple devices without gaps, reduces device size, and enhances user convenience by allowing for easy transport and organized power management.
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
Figure 1~2
Figure 3~4a
Figure 4b
AI summary
This application provides a wireless charging device, including: a charging pad and a first controller. The charging pad includes a plurality of charging units, and the first controller is configured to control how the plurality of charging units charge the to-be-charged device. Specifically, 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.