Wireless Charging Authentication Control for Multi-Device Fast Charging
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Solution Overview
Problem
In wireless charging systems where multiple power reception devices are connected to a single power supply device, authentication collisions occur, leading to increased costs and hardware complexity due to the need for multiple authentication circuits, resulting in prolonged battery charging times for devices that fail to receive authentication responses.
Innovation Solution
A power supply device with a single authentication circuit that uses a control circuit to manage authentication requests from multiple power reception devices, determining the order of authentication and relaying data signals to authenticate each device sequentially while maintaining power transmission, thereby avoiding collisions and reducing hardware complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple authentication circuits are provided to authenticate all power reception devices simultaneously, then authentication reliability is improved, but device complexity and cost increase
Solution Approach 1:
The control circuit acts as an intermediary between multiple power reception devices and the single authentication circuit. It receives authentication requests from multiple devices, manages the authentication process sequentially, and relays signals between the devices and the authentication circuit, thereby eliminating the need for multiple authentication circuits while maintaining reliable authentication.
Solution Approach 2:
The single authentication circuit is designed to handle authentication requests from multiple different power reception devices through the control circuit's coordination. The authentication circuit performs the same authentication function for different devices in sequence, making it a universal solution that replaces multiple dedicated authentication circuits.
2Productivity
If multiple authentication circuits are provided to authenticate all power reception devices simultaneously, then authentication speed is improved, but cost increases
Solution Approach 1:
The control circuit implements periodic action by managing authentication requests in a time-multiplexed manner. When multiple authentication requests are received, the control circuit processes them in sequence with different time intervals, allowing a single authentication circuit to serve multiple devices without requiring simultaneous operation, thereby reducing cost while maintaining acceptable authentication speed.
3Device complexity
If authentication is performed sequentially with a single authentication circuit, then device complexity is reduced, but loss of time increases
Solution Approach 1:
The control circuit performs preliminary action by receiving and buffering multiple authentication requests before processing them sequentially. When the authentication circuit becomes available, the control circuit can quickly process the buffered requests, minimizing the overall time loss. Additionally, the system can prepare authentication data in advance to speed up the actual authentication process.
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
Enables authentication of multiple power reception devices without collisions, reducing costs and hardware complexity, and allowing all devices to charge at high speeds by using a single authentication circuit, thus improving charging efficiency.
Implementation Method 1
A battery may be wirelessly charged using a coil in a wireless charging system. With a reception coil of a portable power reception device (e.g., a smartphone, a smartwatch, a wireless earphone charging case (or cradle), and the like) being close to a transmission coil of a power supply device, the portable power reception device may charge a battery by using a power signal received from the power supply device through the reception coil.
Data Source
AI summary
A power supply device is provided. The power supply device includes an authentication circuit, power supply circuits, and a control circuit connected to the authentication circuit and the power supply circuits. Each of the power supply circuits includes a coil and a communication circuit and may be configured to transmit a power signal to one power reception device through the coil. The control circuit performs an authentication operation for fast charging of a plurality of power reception devices without a collision by using the authentication circuit and the power supply circuits.