Battery Charging Voltage Control for Longer Laptop Battery Life
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Batteries in information handling systems degrade faster under high voltage and temperature conditions, leading to irreversible capacity loss when used for extended periods.
Innovation Solution
A battery management computing module adjusts the charging voltage based on accumulated time and user behavior, implementing multiple levels of charge voltage reduction to extend battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the battery is charged at a high voltage and temperature condition, then the charging speed is improved, but the battery degradation accelerates and capacity is lost
Solution Approach 1:
The charging voltage is dynamically adjusted based on accumulated time thresholds. The system transitions from a static charging voltage to a dynamic one that changes over time, reducing voltage after specific time periods (e.g., first threshold, second threshold) to prevent excessive heat and degradation while maintaining fast charging during early stages.
Solution Approach 2:
The charging process is divided into periodic stages with different voltage levels. The system applies high voltage initially for fast charging, then periodically reduces voltage after time thresholds are met, creating a cyclic charging pattern that balances speed and battery health.
2Reliability
If the charging voltage is reduced to extend battery life, then the battery degradation is reduced, but the charging speed decreases
Solution Approach 1:
The system performs preliminary high-voltage charging before the battery reaches critical temperature or degradation thresholds. By charging at high voltage initially and then reducing it, the system captures the benefits of fast charging before harmful effects set in.
Solution Approach 2:
The charging voltage parameter is changed over time based on accumulated charging duration and battery conditions. The system transitions from high voltage to reduced voltage as time thresholds are met, optimizing both charging speed and battery longevity through dynamic parameter adjustment.
Data Source
AI summary
Adjusting a charging rate of battery of an information handling system, the method comprising: determining, at a first time, a first accumulation of time over a first time period that i) a state of charge (SOC) of the battery indicates that the battery is fully charged and that ii) the battery is connected to a power source; comparing the first accumulation of time with a time threshold; determining, based on the comparing, that the first accumulation of time is greater than the time threshold, and in response: decreasing a charging voltage of the battery from a nominal level to a first decreased level; charging the battery based on the charging voltage having the first decreased level.