Dynamic Charging Current Regulation via Cell Voltage Feedback
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Solution Overview
Problem
Existing mobile terminal charging systems risk overcharging due to constant, high current charging without adequate control, posing safety hazards.
Innovation Solution
A quick charging method and system that includes a charging adapter with a second controller and a regulation circuit, and a mobile terminal with a first controller and cell connector, where the charging adapter requests permission for quick charging, monitors the cell's voltage, and adjusts the charging current using a threshold range table to prevent overcharging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constant large current charging is used to reduce charging time, then charging speed is improved, but safety risk increases due to potential overcharging
Solution Approach 1:
The charging system dynamically adjusts the charging current based on real-time cell voltage monitoring. The controller switches between different charging modes (first charging mode with lower current and second charging mode with higher current) depending on the cell's charging state, enabling both fast charging and safety protection
Solution Approach 2:
The system implements a feedback mechanism where the controller continuously monitors the cell voltage and adjusts the charging current accordingly. When the cell voltage reaches a threshold, the controller automatically reduces or stops the charging current to prevent overcharging, ensuring safety while maintaining charging efficiency
2Loss of time
If constant large current charging is applied without monitoring, then charging time is reduced, but cell damage risk increases
Solution Approach 1:
The system performs preliminary monitoring of cell voltage before applying large charging current. The controller first detects the cell's charging state and determines whether the cell can accept high current charging, preventing cell damage before it occurs
Solution Approach 2:
The system changes the charging current parameter based on cell voltage thresholds. When voltage is below the threshold, high current charging is applied; when voltage reaches the threshold, the current is reduced or stopped, optimizing charging time while preventing cell damage
Data Source
AI summary
The present disclosure provides a quick charging method and a quick charging system. A second controller sends a quick-charging request to a first controller. The first controller feeds back a quick-charging permission command. The second controller sends a notification request for obtaining a voltage value of a cell. The first controller obtains the voltage value by a cell connector, and sends the voltage value to the second controller. The second controller finds a current regulation instruction matching a threshold section that the voltage value falls within from a threshold section table, and sends a current regulation instruction to a regulation circuit. The regulation circuit adjusts a current, and outputs a power supply signal of which the current is regulated.