Wireless Charging Control via Random Phase-Delay Packets
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Solution Overview
Problem
Conventional wireless charging systems face challenges in accurately controlling charging power for multiple devices, leading to data collisions and increased costs due to the need for additional communication components and potential frequency band insufficiency.
Innovation Solution
A method and apparatus for wireless charging control that involves determining voltage levels at a DC output terminal and selectively sending random phase-delay packets to carry wireless charging reports, allowing for uni-directional packet transmission with variant timing slots to prevent data collisions and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If out-band bidirectional communication (e.g., Bluetooth) is implemented for wireless charging control, then communication freedom from regulation issues is achieved, but device complexity and cost increase due to additional communication components
Solution Approach 1:
The patent combines wireless charging power transmission and communication functions into a single ISM band channel. The transmitter pad uses the same electromagnetic field for both power transfer and bidirectional communication, eliminating the need for separate Bluetooth or other out-band communication components. This merging approach maintains communication versatility while reducing device complexity and cost.
Solution Approach 2:
The ISM band communication channel is designed to serve multiple functions: power transmission, power control, and bidirectional data communication. The system uses the same frequency band and communication infrastructure for both charging and control operations, making the communication system universal and eliminating the need for additional dedicated communication hardware.
2Productivity
If multiple devices use the same frequency band for simultaneous wireless charging, then charging accessibility is improved, but data collisions occur leading to loss of information
Solution Approach 1:
The patent segments the communication process into distinct time slots for different devices. Each device is assigned specific time windows for transmitting charging reports and receiving control signals. This time-division segmentation allows multiple devices to share the same frequency band simultaneously without data collisions, as each device communicates during its designated time period.
Solution Approach 2:
The system implements periodic communication cycles where devices take turns transmitting information in a structured sequence. The transmitter pad periodically requests charging status from connected devices, and devices respond in a predetermined sequence. This periodic action pattern ensures organized multi-device communication without interference or data loss.
3Device complexity
If conventional wireless charging control is used without variant slot timing, then system simplicity is maintained, but data collisions occur reducing reliability
Solution Approach 1:
The patent introduces dynamic time slot allocation where the timing and duration of communication slots are adjusted based on the number of connected devices and their charging status. Instead of fixed rigid time slots, the system dynamically modifies slot parameters to accommodate varying numbers of devices, preventing data collisions while maintaining reasonable system complexity through standardized adjustment rules.
Data Source
AI summary
A method for performing wireless charging control of an electronic device and an associated apparatus are provided, where the method may include: determining whether a voltage level of a direct current (DC) output at a DC output terminal of a rectifier in the electronic device is greater than a first voltage threshold to generate a first detection result; and according to the first detection result, selectively sending at least one random phase-delay packet, wherein each random phase-delay packet of the at least one random phase-delay packet has a random phase-delay with respect to a time slot, and the at least one random phase-delay packet is utilized for carrying information of at least one wireless charging report of the electronic device. More particularly, a wireless charging device is arranged to wirelessly charge the electronic device, and the electronic device does not obtain information from the wireless charging device through any packet.