Floating Transmitter Coil Layout for Multi-Device Wireless Charging
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Solution Overview
Problem
Existing information handling systems face challenges in efficiently and wirelessly charging multiple mobile computing devices using a limited number of transmit coils, as current solutions often require multiple coils to charge multiple devices, which can be inefficient and bulky.
Innovation Solution
A cart with dual-sided transmit coils, where each coil can wirelessly charge two mobile computing devices simultaneously, reducing the number of coils needed and enhancing efficiency by using omni-directional coils that detect and transmit power to receive coils within a specific distance, allowing for charging of multiple devices with half the number of coils compared to single-sided systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple transmit coils are used to charge multiple mobile computing devices, then the charging capacity increases, but the system size and complexity increase
Solution Approach 1:
The transmit coil is designed to perform multiple functions by charging multiple mobile computing devices simultaneously through its dual surfaces. Each transmit coil can charge up to two devices at once, making it a universal charging unit that eliminates the need for separate coils for each device, thereby reducing system complexity while maintaining high charging capacity
Solution Approach 2:
The transmit coil utilizes both of its surfaces (dual-sided design) for wireless power transmission, effectively using two dimensions of the same component. This allows a single coil to serve multiple devices positioned on opposite sides, doubling the charging capacity without proportionally increasing the number of coils or system footprint
2Device complexity
If one transmit coil charges multiple devices, then the number of coils is reduced, but the detection and power distribution complexity increases
Solution Approach 1:
The system employs feedback mechanisms where each mobile computing device communicates its charging status, power requirements, and detection signals back to the transmit coil controller. This enables the controller to dynamically adjust power distribution to multiple devices simultaneously, managing the complexity of multi-device charging through real-time feedback rather than complex pre-programmed control
Solution Approach 2:
Each mobile computing device actively participates in the charging process by detecting the transmit coil's presence, signaling its charging needs, and regulating its own power reception. This self-service approach simplifies the overall system control, as devices autonomously manage their charging parameters rather than requiring centralized complex control for each device
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 solution enables efficient wireless charging of multiple mobile computing devices with fewer coils, improving charging efficiency and reducing the size of the charging system, while maintaining effective power transmission to multiple devices.
Implementation Method 1
A first transmit coil may be included in the second plate to wirelessly transmit power to a first receive coil in a first mobile computing device within the first slot, and to a second receive coil in a second mobile computing device within the second slot
Data Source
AI summary
A cart to store a plurality of mobile computing devices includes a plurality of slots defined by opposed plates. Each of the slots is configured to accept a corresponding mobile computing device. A first slot is defined by first and second plates, and a second slot is defined by the second plate and a third plate. The second plate includes a first transmit coil for wirelessly transmitting power to a first receive coil in a first mobile computing device within the first slot, and to a second receive coil in a second mobile computing device within the second slot.