USB Charge-Discharge Device with Dynamic Port Role Switching
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Solution Overview
Problem
Mobile power banks with two USB ports face increased size and cost due to dual functionality, and users struggle to identify the power input and output functions without clear markers, leading to operational issues.
Innovation Solution
A charge-discharge device with a USB port featuring a configuration channel and a power channel, equipped with a sampling circuit, pull-up and pull-down circuits, and a control circuit that selectively connects to these circuits based on input voltage signals to determine and manage charging and discharging functions, ensuring normal operation regardless of port insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two USB ports are configured for dual functionality (input and output), then the power bank can charge and discharge, but the size and cost increase
Solution Approach 1:
The patent implements a single USB port that can perform both power input and power output functions by dynamically switching its role based on detection results, eliminating the need for separate dedicated input and output ports while maintaining full charging and discharging capabilities
Solution Approach 2:
The port's function is not fixed but dynamically changed through real-time detection of voltage signals and resistance values, allowing the same physical port to transition between input and output modes based on operational needs, thereby reducing structural complexity
2Device complexity
If two USB ports are configured without clear markers, then the device structure is simpler, but it is difficult to identify the function of each port
Solution Approach 1:
The system automatically detects the function of the connected device and configures the port accordingly without requiring user input or manual identification, making the operation intuitive and eliminating the need for physical markers on the port
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 allows for normal operation of the charge-discharge device with either port insertion, saving production costs and enhancing user convenience by identifying and managing power flow correctly through a single power channel.
Implementation Method 1
sampling the input voltage signal in a predetermined period to generate a plurality of sampling values
Implementation Method 2
selectively connecting the configuration channel to a pull-down circuit or a pull-up circuit according to the sampling values
Implementation Method 3
receiving a first charging voltage via a power channel of the USB port when the configuration channel is connected to the pull-down circuit, and outputting a second charging voltage via the power channel when the configuration channel is connected to the pull-up circuit
Data Source
AI summary
A charge-discharge device and a control method of the charge-discharge device are provided. The control method of the charge-discharge device comprising: receiving an input voltage signal via a configuration channel of a USB port; sampling the input voltage signal in a predetermined period to generate a plurality of sampling values; selectively connecting the configuration channel to a pull-down circuit or a pull-up circuit according to the sampling values, receiving a first charging voltage via a power channel of the USB port when the configuration channel is connected to the pull-down circuit, and outputting a second charging voltage via the power channel when the configuration channel is connected to the pull-up circuit.