DC Charging Adaptor Dynamic Voltage Adjustment
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Solution Overview
Problem
Conventional DC charging methods for mobile terminals require constant voltage output from power source adaptors, limiting charging current and resulting in prolonged charging times, as the charging current is typically controlled to be below 1.5 A to prevent damage to the battery.
Innovation Solution
A DC-charging power source adaptor that dynamically adjusts voltage output based on real-time battery voltage changes, allowing higher charging currents up to 4 A by communicating with the mobile terminal via UART mode and using a controllable switch and digital potentiometer to adjust the charging voltage, enabling rapid charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant voltage output is used from power source adaptor, then battery safety is maintained, but charging current is limited and charging time is prolonged
Solution Approach 1:
The patent applies dynamics by transitioning from constant voltage output to dynamically adjustable voltage output. The power source adaptor continuously monitors battery voltage and adjusts the output voltage in real-time based on battery state, enabling charging current to vary dynamically while maintaining safety. This resolves the contradiction by allowing high current when safe and reducing current when battery voltage approaches limits.
Solution Approach 2:
The patent implements feedback control where the power source adaptor monitors battery voltage continuously and uses this feedback to adjust output voltage. The adaptor communicates with the mobile terminal to receive battery status information and sends control signals to adjust charging parameters, creating a closed-loop system that maintains safety while optimizing charging speed.
2Productivity
If higher charging current is applied, then charging speed increases, but risk of battery damage increases
Solution Approach 1:
The patent changes the voltage parameter dynamically during charging based on battery state. Instead of fixed voltage, the adaptor adjusts voltage levels according to real-time battery voltage measurements and charging stage, enabling higher currents when battery voltage is low and reducing voltage when battery approaches full charge, thus increasing speed while preventing damage.
Solution Approach 2:
The system transitions from static constant voltage charging to dynamic voltage adjustment. The power source adaptor continuously adapts output parameters based on battery conditions, allowing charging current to increase when safe and decrease when battery voltage approaches dangerous levels, resolving the contradiction between speed and safety.
3Adaptability or versatility
If fixed voltage output is used, then device compatibility is maintained, but charging efficiency is reduced
Solution Approach 1:
The patent makes the power source adaptor multi-functional by combining constant voltage mode and dynamic voltage adjustment mode. The adaptor can operate in fixed voltage mode for compatibility with standard devices and switch to dynamic adjustment mode for optimized charging efficiency, serving multiple functions and different device types while maintaining broad compatibility.
Solution Approach 2:
The adaptor dynamically adjusts its operating mode based on device requirements. It maintains fixed voltage output for basic compatibility but can transition to dynamic voltage adjustment when conditions permit, enabling both universal compatibility and high charging efficiency in different scenarios.
Data Source
AI summary
This disclosure relates to a DC-charging power source adaptor including a charging interface, an AC to DC converting unit, and a controlling unit; and the DC-charging power source adaptor is timed to communicate with a mobile terminal which is a charging object, to acquire a change in voltage of a battery in the mobile terminal and further adjust dynamically a volt value of charging voltage output by the DC-charging power source adaptor according to the change in voltage of the battery, and DC-charges the battery in the mobile terminal using the charging voltage.