Battery Charging Cut-Off Voltage Control for Overcharge Prevention
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Solution Overview
Problem
Lithium-ion batteries experience premature capacity decline due to overcharging, which is often caused by user behaviors such as charging to full capacity even when not necessary, leading to significant battery life reduction.
Innovation Solution
A method and apparatus that dynamically adjust the charging cut-off voltage based on the battery's state and user history to prevent overcharging, using predetermined and adjusted charging cut-off voltages to protect the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If users charge the battery to full capacity frequently, then the battery capacity is maximized for use, but the battery life decreases due to overcharging damage
Solution Approach 1:
The patent implements dynamic adjustment of the charging cut-off voltage based on real-time battery state monitoring. The charging termination voltage is not fixed but varies according to battery temperature, charging current, and state of charge, allowing the system to adapt charging parameters to extend battery life while still providing adequate capacity.
Solution Approach 2:
The patent employs feedback mechanisms by continuously monitoring battery voltage, current, and temperature during charging. Based on this feedback, the system dynamically adjusts charging parameters and determines optimal charging termination points, preventing overcharging while maximizing usable capacity.
2Ease of operation
If a fixed charging cut-off voltage is used, then the charging process is simple to control, but overcharging occurs when users charge beyond optimal levels
Solution Approach 1:
The patent enables the battery management system to autonomously determine charging termination without requiring user intervention. The system automatically monitors battery parameters, compares them against safety thresholds, and terminates charging when optimal conditions are met, providing both simplicity and protection.
Solution Approach 2:
The patent changes the charging cut-off voltage parameter dynamically based on battery state rather than using a fixed value. The system adjusts voltage thresholds according to temperature, charging rate, and state of charge, maintaining simple operation while improving battery protection through parameter adaptation.
Data Source
AI summary
A method of charging processing includes: acquiring a present battery voltage of a terminal battery in response to charging the terminal battery; determining a predetermined charging cut-off voltage of the terminal battery during a present charging; determining 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 the predetermined charging cut-off voltage, and controlling the present charging of the terminal battery based on an adjusted charging cut-off voltage.