Adaptive Battery Cutoff Voltage Management
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Solution Overview
Problem
The challenge in prolonging the life of battery packs in electric vehicles while managing costs lies in effectively managing the discharge of battery units, as increasing the capacity or number of cells can lead to higher costs and inefficient usage patterns.
Innovation Solution
A battery management method that records output information, determines output patterns, adjusts cutoff physical quantities based on frequency distribution and similarity analysis, and provides feedback to users to optimize battery usage, thereby extending battery life and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the capacity of the battery pack is increased to prolong battery life, then the life of the battery pack is prolonged, but the cost of the battery pack increases
Solution Approach 1:
The patent applies dynamics by making the cutoff voltage adaptive rather than fixed. The battery management system dynamically adjusts the cutoff voltage based on real-time monitoring of discharge patterns, frequency distribution analysis, and output information. This allows the system to optimize battery utilization without requiring increased capacity, thereby extending battery life while avoiding additional costs associated with larger battery packs.
Solution Approach 2:
The patent changes the parameter of cutoff voltage from a static value to a dynamically adjusted parameter. By analyzing discharge frequency distribution and output patterns, the system modifies the cutoff voltage threshold to match actual usage patterns. This parameter change enables more efficient battery utilization, prolonging effective battery life without increasing the physical battery capacity or cost.
2Duration of action of stationary object
If the number of battery cells is increased to prolong battery life, then the life of the battery pack is prolonged, but the cost of the battery pack increases
Solution Approach 1:
The system employs dynamic adjustment of cutoff voltage based on monitored discharge patterns and frequency distribution. This dynamic approach allows the existing battery cells to be utilized more effectively, extending battery life without adding more cells. The complexity is managed through software-based adaptation rather than hardware expansion.
Solution Approach 2:
The battery management system performs self-service by automatically monitoring its own operation, analyzing discharge patterns, and adjusting cutoff voltage accordingly. This self-adjusting mechanism eliminates the need for additional battery cells or complex external management systems, thereby extending battery life while keeping device complexity low.
3Ease of operation
If a fixed cutoff voltage is used for battery discharge, then the control is simple, but the battery life cannot be optimized based on usage patterns
Solution Approach 1:
The patent transitions from a static cutoff voltage to a dynamic one that adapts to usage patterns. The system monitors discharge frequency distribution and output information, then adjusts the cutoff voltage accordingly. This dynamic approach maintains ease of operation through automated control while significantly optimizing battery life by preventing both over-discharge and unnecessary early termination of discharge cycles.
Solution Approach 2:
The battery management system implements feedback by continuously monitoring discharge patterns, analyzing frequency distribution, and using this information to adjust the cutoff voltage. This closed-loop feedback mechanism optimizes battery life based on actual usage patterns while maintaining simple operation through automated adjustment, eliminating the need for manual intervention.
Data Source
AI summary
A battery management method includes recording output information associated with a discharging of a battery unit, determining output pattern information based on the recorded output information, determining an adjusted cutoff physical quantity of the battery unit based on the determined output pattern information, and changing a cutoff physical quantity of the battery unit to the adjusted cutoff physical quantity.