Battery Power Management via Capacity Ratio Adjustment
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Solution Overview
Problem
Rechargeable batteries in electronic devices experience declining capacity over time due to aging, leading to reduced battery life and increased frequency of recharging, which affects both user devices and non-user devices like sensors, resulting in undesirable performance and maintenance intervals.
Innovation Solution
Implementing a power management method that reduces power consumption based on the ratio of current full charge capacity to initial full charge capacity, calculated through determining the average power consumption profile and adjusting operational parameters to minimize impact on user experience while extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device operates at full power consumption, then performance and user experience are maintained, but battery life decreases due to aging
Solution Approach 1:
The system dynamically adjusts power consumption based on the battery's current capacity relative to its initial capacity. As the battery ages and capacity decreases, the system automatically reduces power consumption of operations to compensate, maintaining consistent battery life. This is achieved by monitoring battery capacity over time and modulating operational parameters accordingly.
Solution Approach 2:
The system changes operational parameters (such as processing speed, transmission power, or operational frequency) based on the battery's state of health. By adjusting these parameters in response to battery aging, the system reduces power consumption to offset capacity loss, thereby maintaining reliable operation throughout the battery's lifecycle.
2Duration of action of moving object
If power consumption is reduced to extend battery life, then battery aging effects are mitigated, but performance and user experience may be affected
Solution Approach 1:
The system implements feedback by continuously monitoring battery capacity and comparing it to initial capacity. Based on this feedback, the system adjusts power consumption levels to maintain consistent battery life while preserving performance. The feedback loop ensures that performance degradation is minimized by only reducing power consumption to the extent necessary to compensate for battery aging.
Solution Approach 2:
The system applies partial power reduction rather than complete throttling. By reducing power consumption only to the extent needed to offset battery aging, the system maintains adequate performance for user needs while extending battery life. This partial action approach avoids excessive reduction that would compromise user experience.
3Productivity
If operations are performed repeatedly with predictable patterns, then device functionality is maintained, but battery capacity degrades faster
Solution Approach 1:
The system recognizes predictable operational patterns and adjusts power consumption periodically based on battery capacity degradation. For repetitive operations, the system modulates power usage to account for cumulative battery stress, reducing energy loss while maintaining productivity. This periodic adjustment aligns with the cyclical nature of battery charging and discharging.
Data Source
AI summary
A method and apparatus reduce power consumption and mitigate declining battery life. In some embodiments, an initial full charge capacity, C(O), of a rechargeable battery is determined. A full charge capacity, C(t), of the rechargeable battery is determined at time t. An average power consumption profile is determined. A reduced power consumption is implemented based on the average power consumption profile and a factor C(t)/C(O). In other embodiments, functions that are not used in an average power consumption profile are deactivated. Other functions that occur in certain use cases of the average power consumption profile are activated and deactivated as needed.