Smart Battery Charging Around Idle Periods to Limit High-Voltage Aging
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Solution Overview
Problem
Battery lifespan is reduced due to varying usage habits and environments, leading to accelerated aging from prolonged high voltage states during charging.
Innovation Solution
A smart charging method that employs constant current charging at a low rate followed by constant voltage charging, avoiding prolonged full capacity states, which is implemented through a power management unit that detects charger connections and idle periods to manage battery charging modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constant voltage charging is applied continuously, then charging speed is improved, but battery lifespan deteriorates due to prolonged high voltage states
Solution Approach 1:
The patent implements periodic action by alternating between constant current charging and constant voltage charging in cycles. The charging process switches between these two modes based on time intervals and battery state, preventing continuous exposure to high voltage conditions while maintaining efficient charging periods, thus resolving the contradiction between charging speed and battery lifespan
Solution Approach 2:
The patent applies dynamics by making the charging parameters adjustable and time-dependent. The charging current and voltage are dynamically modified based on the charging stage and detected battery conditions, transitioning from fixed high-voltage charging to adaptive charging that reduces voltage exposure time, thereby protecting battery lifespan while maintaining charging efficiency
2Reliability
If battery remains at full capacity for long period, then charging completeness is improved, but battery aging accelerates
Solution Approach 1:
The patent applies preliminary action by implementing an idle period between constant current and constant voltage charging stages. During this idle period, the battery is allowed to rest before reaching full capacity, preventing immediate prolonged exposure to high voltage states and reducing aging effects while still achieving complete charging
Solution Approach 2:
The patent uses periodic action by introducing regular idle periods during the charging cycle. These periodic rest intervals prevent continuous full capacity states, allowing the battery to recover between charging phases while ensuring charging completeness is achieved over the full cycle
Data Source
AI summary
A smart charging method and an electronic device using the same are provided. The smart charging method includes the following steps. Whether an electronic device is connected to a charger is determined. If the battery is connected to the charger, whether a current time is within a predetermined idle period is determined. If the current time is within the predetermined idle period, a battery of the electronic device is charged at a charge rate less than 0.8C by constant current charging, which lasts for a predetermined constant current charging time. After the predetermined constant current charging time is over, the battery is idled for a predetermined idle time. After the predetermined idle time is over, the battery is charged by constant voltage charging.