Battery Charging Control via Location and Time Conditions
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Solution Overview
Problem
Lithium-ion batteries in mobile devices experience capacity loss due to increased internal resistance over time, leading to reduced battery life, and existing charging methods do not effectively prolong battery lifespan without interrupting device operation.
Innovation Solution
A system that intelligently controls rechargeable battery charging based on user-defined conditions such as location and time, using the Advanced Configuration and Power Interface (ACPI) to suspend charging before reaching a fully charged state, thereby extending battery life without interrupting device operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the battery is fully charged while the device is plugged into AC power, then the device has sufficient power availability, but the battery life span is reduced due to elevated temperature and full charge state
Solution Approach 1:
The system performs partial charging by suspending the charging process before the battery reaches full charge state (e.g., at 80% charge level). This partial action approach provides sufficient power availability for device operation while avoiding the harmful effects of maintaining 100% charge state and elevated temperatures, thus extending battery lifespan.
Solution Approach 2:
The charging threshold is made dynamic rather than fixed. The system automatically adjusts the charging suspension threshold based on detected operating conditions such as temperature levels, device power consumption patterns, and battery state. This dynamic adjustment allows the system to optimize between power availability and battery life extension in real-time.
2Duration of action of stationary object
If the battery charging is suspended before full charge to extend battery life, then battery life span is increased, but the device may experience power interruption if AC power is lost
Solution Approach 1:
The system continuously monitors multiple parameters including battery charge level, temperature, device power consumption, and AC power availability. Based on this feedback, the system dynamically adjusts the charging threshold and makes real-time decisions about whether to suspend or continue charging, ensuring both battery life extension and power supply reliability.
Solution Approach 2:
The system performs preliminary charging to reach the optimized threshold level before AC power interruption occurs. By proactively charging to the appropriate level based on predicted usage patterns and historical data, the system ensures sufficient power availability for device operation even if AC power is lost, while still extending battery life through controlled charging suspension.
3Device complexity
If a fixed charging threshold is used to extend battery life, then the charging process is simple to implement, but it cannot adapt to varying user needs and operating conditions
Solution Approach 1:
The charging threshold transitions from a fixed value to a dynamic parameter that automatically adjusts based on detected operating conditions. The system monitors temperature, device power consumption, battery state, and environmental factors, then adaptively modifies the charging suspension threshold accordingly. This maintains implementation simplicity while achieving high adaptability to varying user needs and operating conditions.
Data Source
AI summary
A method and system are provided in which a charging process for rechargeable batteries is controlled in accordance with selected predetermined variable conditions. In an exemplary embodiment, a user is enabled to select the predetermined conditions under which the charging of a battery is suspended until such conditions have changed. Such conditions include, for example, physical location of the battery being charged and/or the time and/or date when the battery is being charged. A user GUI is provided to enable a user to input selected times and/or dates and/or locations when the device containing the battery is likely to be away from a charging source and needs to be fully charged, and/or selected times and/or dates and/or locations when the device is likely to have access to a power source and the battery is enabled to be charged only to a storage level.