Terminal Battery Charging Cut-Off Adjustment for Overcharge Aging
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Solution Overview
Problem
Lithium-ion batteries experience premature capacity decline due to overcharging, which is common among users who charge their devices frequently and anxiously, leading to reduced battery life.
Innovation Solution
A method and apparatus that dynamically adjust the charging cut-off voltage of a terminal battery based on its current state and historical overcharging characteristics to prevent overcharging, extending battery life by reducing the cut-off voltage when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the charging cut-off voltage is set high to maximize battery capacity utilization, then the battery capacity and energy storage are improved, but the battery life deteriorates due to overcharging damage
Solution Approach 1:
The patent applies dynamics by making the charging cut-off voltage adjustable rather than fixed. The system dynamically adjusts the cut-off voltage based on the battery's health state (SOH) and charging history. When overcharging is detected or battery age increases, the cut-off voltage is reduced to protect battery life, while maintaining higher voltages when the battery is healthy to maximize capacity utilization.
Solution Approach 2:
The patent changes the electrical parameter (cut-off voltage) based on battery condition. By monitoring charging characteristics and battery state, the system modifies the voltage threshold to balance between maximizing charge storage and preventing overcharging damage, thereby resolving the contradiction between capacity and lifespan.
2Ease of operation
If users charge batteries frequently to full level to eliminate low battery anxiety, then the ease of operation is improved, but the battery life deteriorates due to repeated overcharging
Solution Approach 1:
The system implements feedback by continuously monitoring charging characteristics, battery voltage, and charging duration. Based on this feedback, the system identifies overcharging patterns and adjusts the cut-off voltage accordingly. This allows the system to protect battery life while maintaining user convenience, as users still experience full charging when appropriate but the system prevents harmful overcharging.
Solution Approach 2:
The battery management system performs self-service by automatically adjusting charging parameters without user intervention. The system monitors its own charging patterns and makes autonomous decisions to modify cut-off voltage, eliminating the need for users to manually manage charging to protect battery life.
3Device complexity
If a fixed charging cut-off voltage is used to simplify charging control, then the device complexity is reduced, but the reliability deteriorates due to inability to prevent overcharging
Solution Approach 1:
The system performs preliminary action by pre-establishing charging profiles and cut-off voltage thresholds based on battery characteristics and usage patterns. Rather than implementing complex real-time adjustments during charging, the system prepares appropriate voltage thresholds in advance based on monitored battery state, simplifying the actual charging control while maintaining reliable overcharging protection.
Data Source
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AI summary
A method and an apparatus of charging processing, and a storage medium. The method includes: acquiring (101, 203, 304) a present battery voltage of a terminal battery in response to charging the terminal battery; determining (102, 204, 305) a predetermined charging cut-off voltage of the terminal battery during a present charging; determining (103, 205, 306) whether the terminal battery is in an overcharging state according to the predetermined charging cut-off voltage and the present battery voltage; and in response to determining that the terminal battery is in the overcharging state, adjusting (104, 206, 307) the predetermined charging cut-off voltage, and controlling the present charging of the terminal battery based on the adjusted charging cut-off voltage.