Battery Diagnosis Using Electrode Profile Maps for Multi-Phase Cells
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Solution Overview
Problem
Conventional battery diagnosis methods are inaccurate for battery cells with multi-phase characteristics, leading to significant degradation in diagnostic accuracy as the multi-phase characteristic changes over time, distorting the overall electrode design.
Innovation Solution
A battery diagnosing apparatus and method that generates comparison profiles based on electrode profile maps, determining diagnostic factors like negative electrode participation end points by comparing first and second profiles, adjusting for multi-phase characteristics using scaling and shifting operations, and limiting voltage and State of Charge (SOC) ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional diagnostic methods are applied to battery cells with multi-phase characteristics, then the diagnostic process is simple, but the diagnostic accuracy greatly degrades as the battery degrades
Solution Approach 1:
The patent segments the battery electrode profiles into multiple comparison profiles based on different degradation states. Instead of using a single conventional diagnostic method, the system divides the diagnostic approach into multiple electrode profiles that can be selectively compared, allowing accurate diagnosis even as the battery degrades over time.
Solution Approach 2:
The patent implements a dynamic diagnostic approach where multiple electrode profiles are stored in a database, and the system dynamically selects and compares appropriate profiles based on the current state of the battery. This allows the diagnostic method to adapt to changing battery conditions while maintaining accuracy.
2Reliability
If the overall electrode design is significantly distorted from release due to multi-phase characteristic changes, then the battery cell degrades, but conventional diagnostic methods remain unchanged
Solution Approach 1:
The patent performs preliminary actions by pre-storing multiple electrode profiles corresponding to different degradation states in a database before actual diagnosis is needed. This preparation allows the system to quickly and accurately diagnose battery conditions without requiring complex real-time adjustments to the diagnostic methodology.
Solution Approach 2:
The patent changes the diagnostic parameters by using multiple electrode profiles with different characteristics instead of a single fixed diagnostic method. The system selects and compares appropriate profiles based on the battery's current state, allowing accurate diagnosis across different degradation levels while improving reliability.
Data Source
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AI summary
Disclosed is a battery diagnosing apparatus and a battery diagnosing method. The battery diagnosing apparatus includes a data obtaining unit configured to obtain a first profile representing a capacity-voltage relationship of a battery cell containing an active material with a multi-phase characteristic, and a processor configured to generate a plurality of comparison profiles based on a plurality of electrode profiles included in an electrode profile map. The processor is configured to select, as a second profile, one comparison profile from the plurality of comparison profiles by comparing each of the plurality of comparison profiles with the first profile, and determine a negative electrode participation end point as a diagnostic factor representing a degradation state of the battery cell based on the second profile.