Battery Current Pattern Updating for Rapid Charging Life Protection
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Solution Overview
Problem
The rapid charging of battery packs leads to a decrease in battery capacity, and existing methods do not effectively address this issue without affecting the battery's lifespan.
Innovation Solution
A method and apparatus for updating the current pattern for rapid charging, which involves calculating an adjustment coefficient based on the internal resistance of the battery module and updating the current pattern to minimize capacity loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If rapid charging is performed using a fixed current pattern, then charging speed is improved, but battery capacity degradation increases
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed current pattern to a dynamic current pattern that changes based on battery state. The current pattern is updated in real-time based on measured internal resistance values, allowing the charging system to adapt to battery degradation and maintain optimal charging conditions throughout the battery's lifecycle.
Solution Approach 2:
The patent implements parameter changes by modifying the current pattern parameters (current magnitude, duration, intervals) based on battery internal resistance measurements. As the battery ages and internal resistance increases, the system adjusts the charging current parameters to prevent excessive heat generation and capacity loss, thereby resolving the contradiction between charging speed and battery reliability.
2Duration of action of stationary object
If the current pattern is updated frequently to maintain battery health, then battery life is improved, but system complexity increases
Solution Approach 1:
The patent implements feedback by continuously measuring the battery's internal resistance and using this information to update the current pattern. The BMS receives internal resistance values from the internal resistance calculation unit and automatically adjusts the charging current pattern accordingly, creating a closed-loop control system that maintains battery health without requiring complex manual intervention.
Solution Approach 2:
The system applies self-service by enabling the BMS to autonomously update the current pattern based on battery condition monitoring. The battery management system automatically detects changes in battery state through internal resistance measurements and adjusts charging parameters without external intervention, simplifying the overall system architecture while extending battery life.
3Productivity
If a higher constant current is applied for charging, then charging speed is improved, but internal resistance increase accelerates
Solution Approach 1:
The patent applies preliminary action by measuring the battery's internal resistance before initiating rapid charging and using this pre-measured value to determine the appropriate current pattern. This allows the system to select an optimal charging current that maximizes charging speed while preventing excessive internal resistance increase from the outset, rather than reacting after damage has occurred.
Data Source
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AI summary
The present invention relates to an apparatus and method for updating a current pattern for rapid charging, and a computer program stored in a storage medium performing the method. Provided is an apparatus for updating a current pattern for rapid charging, including a resistance calculation unit configured to calculate an internal resistance of a battery module, a storage unit configured to store a current pattern for rapid charging of the battery module, and a calculation unit configured to update the current pattern according to a state of the internal resistance of the battery module, and the calculation unit calculates a resistance increase rate based on the internal resistance calculated by the resistance calculation unit, calculates an adjustment coefficient based on the calculated resistance increase rate, and updates the current pattern using the calculated adjustment coefficient and the current pattern so that when performing rapid charging, the impact on the life of the battery module is minimized.