Power Source Adaptor Dynamic Charging via UART Feedback
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Solution Overview
Problem
Conventional power source adapters for charging mobile terminals provide constant charging voltage, leading to prolonged charging times due to limited charging current, which is typically below 1.5 A, necessitating frequent recharging of batteries in portable electronic devices with increasing power consumption.
Innovation Solution
A power source adapter with an AC to DC converting unit and a controlling unit that communicates with the mobile terminal via UART to dynamically adjust charging voltage, allowing for higher charging currents up to 4 A by switching between normal and rapid charging modes, utilizing a USB interface with a power source pin, ground pin, and communication pins to manage charging efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If constant charging voltage is provided by conventional power source adapters, then charging interface compatibility is maintained, but charging current is limited to below 1.5 A resulting in prolonged charging time
Solution Approach 1:
The patent implements dynamic charging by allowing the power source adapter to adjust charging voltage and current based on real-time communication with the mobile terminal. The adapter transitions from static constant voltage output to dynamic variable output, enabling charging current to increase from conventional limits up to 4 A or higher, thereby significantly reducing charging time while maintaining safety through continuous monitoring.
Solution Approach 2:
The patent employs feedback mechanisms where the mobile terminal communicates battery status, charging capacity, and safety parameters back to the power source adapter via UART communication. The adapter uses this feedback information to dynamically adjust charging parameters, ensuring optimal charging current is delivered without exceeding safety thresholds, thus resolving the contradiction between high charging current and charging safety.
2Productivity
If charging current is increased to reduce charging time, then battery charging speed improves, but risk of overheating and safety issues increases
Solution Approach 1:
The patent implements real-time feedback monitoring where the mobile terminal continuously reports battery temperature, charging status, and safety parameters to the power source adapter. The adapter uses this feedback to dynamically adjust charging current, reducing it when temperature thresholds are approached and maintaining high current when safe, thereby achieving fast charging without excessive overheating risk.
Solution Approach 2:
The patent changes operating parameters dynamically during charging by adjusting voltage and current based on battery state, temperature, and charging phase. The system transitions from fixed parameter charging to variable parameter charging, allowing optimal charging speed while staying within safety boundaries through continuous parameter monitoring and adjustment.
3Productivity
If dynamic voltage adjustment is implemented to enable rapid charging, then charging efficiency improves, but device complexity increases due to additional communication and control requirements
Solution Approach 1:
The patent leverages the existing USB interface's data communication capability (UART) to serve dual purposes: both standard data transmission and charging parameter communication. By reusing existing communication pins and protocols, the system achieves dynamic charging control without adding separate dedicated communication channels, thereby minimizing the increase in device complexity while enabling rapid charging functionality.
Solution Approach 2:
The patent implements self-service mechanisms where the mobile terminal autonomously provides charging capacity information, battery status, and safety parameters to the power source adapter. The adapter uses this self-provided information to automatically adjust charging parameters without requiring complex external control systems, reducing overall system complexity while maintaining high charging efficiency.
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
Significantly speeds up battery charging by maintaining higher charging currents, thereby reducing the time required to fully charge the battery, while ensuring compatibility with existing charging interfaces and hosts.
Implementation Method 1
the AC to DC converting unit is configured to convert an external AC input power source into charging voltage required for the mobile terminal
Data Source
AI summary
The application discloses a power source adaptor for charging directly and a mobile terminal, where the power source adaptor for charging directly is timed to communicate with a mobile terminal which is a charging object, in the UART communication mode to obtain a change in voltage of a battery in the mobile terminal, adjusts dynamically a volt value of charging voltage output by the power source adaptor for charging directly according to the varying voltage of the battery, and charges directly the battery in the mobile terminal using the charging voltage.