Charging System Voltage Adjustment for USB PPS Efficiency
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Solution Overview
Problem
Existing USB charging systems with program power supply (PPS) face inefficiencies due to non-adjustable power source voltage and current, which affects charging efficiency across various electronic devices.
Innovation Solution
A charging method and system that adjusts the power source voltage until the inputting current approaches a predetermined limit, using a controller, current detector, and communication unit to optimize charging efficiency by maintaining a current difference within a specified range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the power source voltage and current are continuously adjustable under PPS, then the USB adaptor can be widely used for more electronic devices, but the charging efficiency cannot be optimized without programming the power source voltage or current
Solution Approach 1:
The patent implements dynamic adjustment of power source voltage and current through continuous sweeping of voltage values and real-time monitoring of inputting current. The system transitions from static fixed voltage/current settings to dynamic programmable control, allowing the power source to adapt its output parameters continuously during charging to optimize efficiency while maintaining compatibility with various devices
Solution Approach 2:
The patent employs feedback control by measuring the inputting current through a current detector and comparing it with a predetermined current limit. The system uses this feedback information to adjust the power source voltage dynamically, ensuring the inputting current approaches but does not exceeds the limit, thereby optimizing charging efficiency while preventing overcurrent conditions
2Loss of energy
If the power source voltage is swept to approach the inputting current limit, then the charging efficiency is optimized, but the system complexity increases due to voltage sweeping and current monitoring mechanisms
Solution Approach 1:
The patent implements self-service control where the charging system automatically performs voltage sweeping, current monitoring, and parameter adjustment without requiring external intervention. The controller autonomously manages the entire charging optimization process, including setting current limits, sweeping voltage, detecting current values, and adjusting power source parameters based on real-time feedback, thereby reducing the need for complex external control mechanisms
Data Source
AI summary
A charging method, a charging system and an electronic device are provided. The charging method includes the following steps: An inputting current limit is set. An inputting current of at least one charger is measured. A power source voltage of a power source is adjusted until a current difference between the inputting current and the inputting current limit is within a predetermined range.