Power Adapter Terminal Bidirectional Communication Charging
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Solution Overview
Problem
Quick charging of smartphones often results in over-temperature, overvoltage, and overcurrent issues, leading to potential damage due to the existing methods of increasing output current, and previous solutions like time division multiplexing for communication during charging affect efficiency and cause heating problems.
Innovation Solution
Implementing a bidirectional communication mechanism between the power adapter and the terminal via a data line to negotiate charging modes and parameters, allowing for safe transitions between regular and quick charging without overheating, using USB or micro USB interfaces for power and data lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If output current of power adapter is increased to achieve quick charging, then charging speed is improved, but over-temperature, overvoltage, overcurrent and interface burnout occur
Solution Approach 1:
The patent implements a communication mechanism between power adapter and terminal that enables real-time monitoring and control of charging state. The terminal sends charging requests specifying required current, and the adapter responds by adjusting output current dynamically based on battery state and safety conditions, preventing overcurrent and overtemperature issues while maintaining fast charging capability
Solution Approach 2:
The charging current is made dynamic rather than fixed. The power adapter adjusts output current in real-time based on communication with the terminal, transitioning between different charging modes (standard and quick charging) according to battery state, temperature conditions, and safety requirements, thereby achieving both fast charging and safety
2Loss of information
If time division multiplexing is applied on power line for communication during charging, then communication between adapter and terminal is enabled, but charging efficiency is affected and isolation element heats up severely
Solution Approach 1:
The patent introduces a dedicated data line as an intermediary channel for communication between power adapter and terminal. This separate communication path allows bidirectional data exchange without interfering with power transmission, eliminating the need for time division multiplexing and associated isolation elements, thereby maintaining full charging efficiency while enabling real-time communication for charging mode negotiation and monitoring
Data Source
Figure 1~2
AI summary
A power adapter and a terminal. The power adapter (10) comprises a power conversion unit (11) and a charging interface (12). The charging interface comprises a power cable. The power conversion unit forms a charging loop with a terminal by using the power cable, so as to charge a battery of the terminal. The power adapter also comprises a communications unit (13). The charging interface also comprises a data line. During connection between the power adapter and the terminal, the communications unit performs bidirectional communication with the terminal through the data line. By using the power adapter and the terminal, the phenomenon of heating of a power cable due to an excessively high load of a single isolation unit can be avoided.