Battery Management Modes for Fast Charging and Cycle-Life Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The cycle-life of lithium-ion batteries in electric vehicles is shortened due to frequent rapid charging and excessive usage, leading to increased replacement costs and environmental impact.
Innovation Solution
A battery management system that allows users to select between a normal mode for maximum capacity and rapid charging, and an eco-friendly mode that limits battery capacity and charging speed to slow charging, thereby extending the battery's cycle-life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If rapid charging method is used to reduce charging time, then charging speed is improved, but battery cycle-life is shortened
Solution Approach 1:
The patent implements dynamic charging mode selection that adapts between rapid charging and slow charging based on real-time battery state monitoring. The system dynamically adjusts charging parameters including current, voltage, and temperature thresholds to optimize both charging speed and battery longevity, resolving the contradiction between fast charging and cycle-life extension.
Solution Approach 2:
The system changes charging parameters (current, voltage, temperature) based on battery state to switch between rapid and slow charging modes. By modifying these physical parameters dynamically, the system achieves both fast charging when appropriate and battery protection when needed, resolving the speed versus reliability contradiction.
2Productivity
If battery capacity is fully utilized to maximize driving range, then productivity is improved, but battery aging is accelerated
Solution Approach 1:
The patent applies partial action by utilizing only the necessary portion of battery capacity for each charging cycle based on actual driving needs. Rather than always charging to 100% capacity, the system charges to an optimized level that provides sufficient driving range while reducing stress on the battery, thereby extending cycle-life while maintaining productivity.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor battery state, usage patterns, and environmental conditions to dynamically adjust charging termination points. This feedback loop enables the system to optimize the balance between driving range and battery aging by learning from actual usage patterns and adjusting capacity utilization accordingly.
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
The present invention relates to a battery management method and a battery system for provides the same. An embodiment of the present invention provides a battery system including: a battery; and a battery management system (BMS) configured to control charging of the battery depending on a normal mode using a first battery capacity between a first lower limit state of charge (SOC) and a first upper limit SOC or an eco-friendly mode using a second battery capacity between a second lower limit SOC and a second upper limit SOC, wherein the first lower limit SOC is smaller than the second lower limit SOC, and the first upper limit SOC is greater than the second upper limit SOC.