Power Management System for Battery Life Extension
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Solution Overview
Problem
Users of portable information handling systems experience accelerated battery degradation when using non-mobile external power supplies for extended periods, leading to shorter battery life and increased frequency of battery pack replacements.
Innovation Solution
A power supply system with a power management system that determines the battery power level and adjusts the charging and power supply accordingly, disabling external power when the battery is fully charged and reducing charge levels to prevent overcharging, thereby extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the external power supply continuously charges the battery to full capacity, then the battery power level is maintained at maximum, but the battery degradation accelerates and battery life shortens
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the battery charge level threshold based on detected usage patterns. When the system detects that the external power supply has been connected for an extended period, it modifies the charge threshold parameter to prevent the battery from reaching full charge, thereby reducing degradation while maintaining sufficient power levels for portability needs.
Solution Approach 2:
The patent implements dynamics by making the charge threshold adaptive rather than static. The power management system continuously monitors external power connection duration and automatically adjusts the charge threshold accordingly, creating a dynamic response that balances battery maintenance with degradation prevention without requiring user intervention.
2Reliability
If the battery is kept at fully charged status for extended periods, then power availability is maximized, but permanent battery degradation occurs more rapidly
Solution Approach 1:
The patent changes the charge threshold parameter from a fixed value to a dynamic value that adjusts based on external power connection duration. This parameter modification allows the system to maintain adequate power availability while preventing the battery from remaining at full charge status for extended periods, thus extending battery storage duration.
3Use of energy by moving object
If the charging threshold is increased to maintain higher battery power levels, then power availability improves, but battery degradation accelerates
Solution Approach 1:
The patent makes the charging threshold dynamic by linking it to the duration of external power connection. The threshold automatically adjusts upward when portability is needed (short connection duration) and downward when the system is primarily docked (long connection duration), creating a dynamic balance between power availability and degradation prevention.
Data Source
AI summary
A power supply system includes a battery and a power management system. The power management system is coupled to the battery and to an external power source that is operable to charge the battery using a first charge level. The power management system is operable to determine that a battery power level of the battery is greater than a first predetermined level that depends on a battery storage option and, in response, disable power from being supplied from the external power source such that power is supplied from the battery until the battery power level is below the first predetermined level. The power management system is also operable to determine that the battery power level of the battery is less than the first predetermined level and, in response, charge the battery with a second charge level that is less than the first charge level until the battery power level is above a second predetermined level that depends on the battery storage option.