Power Limit Adjustment Based on Battery Self-Power Consumption Time Averages
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Solution Overview
Problem
Laptops face sudden shutdowns due to insufficient power reduction mechanisms when switching from AC to DC power, leading to overcurrent protection and battery overload, especially as battery age and power consumption patterns change.
Innovation Solution
An electronic apparatus and method that detects external power supply, calculates and compares self-power consumption times using a simple moving average, and adjusts power limits to prevent overcurrent protection by dynamically adjusting system load based on power consumption ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If throttling is used to extend battery operation time, then battery operation time is extended, but the system may still not react in time causing overcurrent protection and instantaneous shutdown
Solution Approach 1:
The system performs preliminary action by detecting battery self-power consumption characteristics in advance (when AC power is connected) and pre-calculating appropriate power limits before the AC adapter is unplugged. This allows the system to have the power limit adjustment mechanism ready to activate immediately during power transition, preventing overcurrent protection and instantaneous shutdown while maintaining extended battery operation time through proactive rather than reactive power management.
2Reliability
If power limit is adjusted based on battery self-power consumption characteristics, then system responds in time preventing overcurrent protection, but system complexity increases
Solution Approach 1:
The system applies self-service by automatically detecting its own battery self-power consumption characteristics and using this information to adjust power limits without requiring external intervention or complex user configuration. The processor monitors battery capacity changes over time, calculates self-power consumption rates, and autonomously determines appropriate power limits, thereby achieving reliable real-time response while keeping the power management system relatively simple and self-contained.
Data Source
AI summary
An electronic apparatus and a load adjusting method thereof are provided. The method includes the following steps. Powering of an external power supply is detected. A self-power consumption time of the battery from a full capacity to a preset capacity is calculated and recorded when the powering of the external power supply is detected. A first average value of multiple self-power consumption times recorded within a preset period from a current time is calculated, and the first average value is compared with a second average value of the self-power consumption times of a previous preset period of the preset period. A value of a power limit for controlling the electronic apparatus to enter a load adjusting state is adjusted according to a comparison result.