Secondary Battery Deterioration Estimation With Adaptive Formula Updates
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Solution Overview
Problem
Existing methods struggle to accurately determine the deterioration degree of secondary batteries due to variations in deterioration progress, making it difficult to assess their condition directly.
Innovation Solution
A server and external terminal system that updates estimation formulas based on real-time battery characteristics, allowing for precise determination of deterioration by comparing battery data with stored formulas, ensuring accuracy through continuous adaptation to changing battery conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If estimation formulas are updated based on real-time battery characteristics, then determination accuracy is improved, but device complexity increases
Solution Approach 1:
The system divides functionality between external terminals (data collection and preliminary processing) and a server (estimation formula storage and updating), allowing complex operations to be distributed and managed separately while maintaining overall system accuracy
Solution Approach 2:
The system implements continuous feedback loops where battery characteristics are monitored in real-time, estimation formulas are updated based on this data, and the updated formulas are applied to improve subsequent determinations, creating a self-improving system that maintains high accuracy without requiring complete system redesign
2Measurement precision
If battery deterioration is determined through various types of information, then measurement capability is improved, but difficulty of detecting and measuring increases
Solution Approach 1:
The patent introduces estimation formulas as intermediary computational models that process multiple battery characteristics (voltage, current, temperature, charge-discharge history) and convert them into a unified deterioration degree metric, simplifying the measurement process while maintaining comprehensive analysis capability
Solution Approach 2:
The system uses universal estimation formulas that can evaluate multiple types of battery characteristics simultaneously through a single standardized process, allowing the same measurement framework to handle diverse battery types and conditions without requiring separate measurement procedures for each parameter
Data Source
AI summary
A server for a deterioration degree determination system for a secondary battery includes an estimation formula memory unit and an update unit. The estimation formula memory unit stores an estimation formula for determining a deterioration degree based on a battery characteristic related to transition of a battery state over a predetermined voltage section in the secondary battery or a battery characteristic relationship value related to the battery characteristic. The update unit that updates the estimation formula stored in the estimation formula memory unit based on the battery characteristic related to the transition of the battery state of the secondary battery acquired by charging and discharging the secondary battery in an external terminal.