Power Adapter Terminal Charging Mode Negotiation
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Solution Overview
Problem
Current power adapters increase output current or voltage to achieve quick charging, leading to overheating or damage of smartphones, without considering the device's tolerance capacity.
Innovation Solution
A power adapter and terminal system that negotiates charging modes via bidirectional communication, controlling output voltage and current based on determined modes to prevent overheating, featuring multiple charging modes including common and quick charging modes, with the terminal identifying supported modes and the adapter adjusting output accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the output current or output voltage of the power adapter is directly increased to achieve quick charging, then the charging speed is improved, but the terminal may overheat or even burn out, reducing its lifespan
Solution Approach 1:
The power adapter dynamically adjusts its output current and voltage based on real-time communication with the terminal device. The adapter transitions between different charging modes (standard mode and quick charging mode) depending on the terminal's tolerance capacity, making the charging parameters flexible rather than fixed to avoid overheating while enabling quick charging when safe
Solution Approach 2:
The system implements bidirectional communication between the power adapter and terminal, where the terminal provides feedback about its charging tolerance capacity. The adapter uses this feedback information to determine whether to activate quick charging mode, creating a closed-loop control system that prevents overheating by continuously monitoring and adjusting output based on terminal conditions
2Loss of time
If the output current or output voltage of the power adapter is directly increased to achieve quick charging, then the charging time is reduced, but the terminal's lifespan is reduced due to overheating or burning out
Solution Approach 1:
The charging system dynamically switches between standard charging mode and quick charging mode based on the terminal's real-time tolerance capacity. This dynamic adjustment allows the system to maximize charging speed when the terminal can tolerate it, while protecting the terminal's lifespan when its tolerance is exceeded, thus resolving the contradiction between charging time and reliability
Solution Approach 2:
Through bidirectional communication, the terminal provides feedback about its charging tolerance capacity to the power adapter. The adapter uses this feedback to intelligently control the charging current and voltage, ensuring that quick charging is only applied when safe for the terminal, thereby reducing charging time without compromising terminal lifespan
Data Source
Figure 1~3
Figure 4
AI summary
A power adapter (200) and a terminal (100) are provided. The terminal (100) includes a battery (110) and a charging interface (120), the terminal (100) introducing a charging current from the power adapter (200) via the charging interface (120) so as to charge the battery (110); and the terminal (100) further includes: a communication unit (130), configured to perform a bidirectional communication with the power adapter (200) via the charging interface (120) so as to determine a charging mode of the terminal (100).