Battery Cell Voltage-Based Cycle Charging to Prevent Overcharge Damage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery charging technologies do not effectively minimize damage to lithium-ion batteries during charging, leading to reduced battery life due to inadequate control over charging currents and voltages.
Innovation Solution
A smart battery cycle charging method and device that detects battery cell voltages using a mapping table to switch between constant current and constant voltage charging modes, optimizing charging times to prevent overcharging and extend battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional charging methods are used, then charging speed is maintained, but battery damage increases and battery life decreases
Solution Approach 1:
The charging device dynamically adjusts charging parameters based on real-time battery state detection. The processor continuously monitors battery voltage and current, and automatically switches between constant current and constant voltage charging modes according to the battery's charging stage, optimizing charging speed while minimizing battery damage
Solution Approach 2:
The charging device implements a feedback mechanism where the processor detects battery voltage and current in real-time, compares them against predefined thresholds, and adjusts charging parameters accordingly. This closed-loop control ensures the battery is charged efficiently while preventing overcharging and excessive voltage stress that would damage the battery
2Productivity
If constant current charging is used throughout, then charging speed is fast, but overcharging occurs causing battery damage
Solution Approach 1:
The charging process is divided into distinct periodic stages: first a constant current charging stage for rapid charging, then a constant voltage charging stage for completing the charge safely. The processor automatically transitions between these stages based on detected battery voltage thresholds, ensuring fast charging without overcharging damage
Solution Approach 2:
The charging device changes operational parameters during the charging process. It starts with constant current mode for high-speed charging, then switches to constant voltage mode when the battery approaches full charge. This parameter transition prevents overcharging while maintaining optimal charging speed throughout the process
3Reliability
If charging time is extended to ensure full charge, then charging completeness is achieved, but battery exposure to damaging conditions increases
Solution Approach 1:
The device replaces time-based charging control with voltage-based control. Instead of charging for a fixed duration, the processor monitors battery voltage and automatically terminates or adjusts charging when voltage thresholds are reached, ensuring complete charging while minimizing unnecessary exposure time to charging currents that can damage the battery
Data Source
AI summary
A smart battery cycle charging method includes detecting a current voltage per battery cell of battery cells in a battery device; according to voltage ranges and charging times corresponding to the voltage ranges in a mapping table, after detecting and determining that the current voltage per battery cell is within one of the voltage ranges, using a constant current to charge the battery cells for one of the charging times corresponding to the one of the voltage ranges; and using a constant voltage to charge the battery cells.