Battery Profile Matching for Negative Electrode Identification
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Solution Overview
Problem
Current battery technologies face challenges in determining the type of a battery's negative electrode, which is crucial for setting optimal usage conditions, as existing methods struggle to distinguish between natural and artificial graphite-based electrodes, leading to potential rapid degradation when inappropriate charging conditions are applied.
Innovation Solution
A battery management apparatus and method that calculates the degree of association between a battery's differential voltage profile and preset profiles to determine the type of the negative electrode, allowing for the setting of specific usage conditions based on the judgment, such as charging and discharging rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the negative electrode type is not identified, then the battery can be used immediately, but the battery may undergo rapid degradation due to inappropriate charging conditions
Solution Approach 1:
The system performs preliminary identification of the negative electrode type by comparing voltage-SOC profile characteristics against reference profiles before the battery is put into service. This preliminary action enables the subsequent setting of appropriate usage conditions, preventing rapid degradation while minimizing the time delay through efficient profile matching algorithms.
2Measurement precision
If the negative electrode type is determined through chemical analysis, then accurate identification is achieved, but the process becomes complex and time-consuming
Solution Approach 1:
The invention replaces complex chemical analysis methods with an electrical measurement-based approach. By utilizing voltage-SOC profile characteristics and comparing them against reference profiles through pattern recognition, the system achieves accurate negative electrode type identification without requiring chemical disassembly or complex analytical equipment.
Solution Approach 2:
The system creates reference profiles that represent the characteristic voltage-SOC behavior of different negative electrode types. These reference profiles serve as templates for comparison, enabling identification by matching the measured battery profile against the stored reference patterns, thereby simplifying the identification process while maintaining accuracy.
3Productivity
If the battery usage conditions are set without knowing the negative electrode type, then the battery can be used immediately, but the battery performance and lifespan are compromised
Solution Approach 1:
The system performs preliminary identification of the negative electrode type by comparing voltage-SOC profile characteristics against reference profiles before the battery is put into service. This preliminary action enables the subsequent setting of appropriate usage conditions, preventing rapid degradation while minimizing the time delay through efficient profile matching algorithms.
Data Source
AI summary
A battery management apparatus includes a profile generating unit configured to obtain a battery profile representing a correspondence between voltage and SOC of a battery and generate a differential profile representing a correspondence between the SOC and a differential voltage of the SOC based on the obtained battery profile, and a control unit configured to receive the differential profile from the profile generating unit, calculate a degree of association between the differential profile and a preset criterion profile, and judge a type of a negative electrode of the battery based on the calculated degree of association.