Multi-Phase Battery Cell Diagnosis via Electrode Profile Map Fitting
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Solution Overview
Problem
Conventional battery diagnosis methods are inaccurate for battery cells with multi-phase characteristics, leading to significant distortion in the overall electrode design as they deteriorate, thus affecting the accuracy of degradation state diagnosis.
Innovation Solution
A battery diagnosing apparatus and method that generates comparison profiles based on electrode profile maps, determining diagnostic factors like negative electrode loading amount by comparing first and second profiles, and adjusting these profiles through scaling or shifting operations to accurately assess degradation states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional diagnostic methods are used for battery cells with multi-phase characteristics, then the diagnostic process is simple, but the diagnosis accuracy greatly deteriorates
Solution Approach 1:
The patent segments the battery electrode profile analysis into multiple distinct phases (first phase, second phase, third phase) with different characteristics. Each phase is analyzed separately using phase-specific reference profiles, allowing accurate diagnosis of multi-phase electrode materials without requiring a single complex diagnostic model.
Solution Approach 2:
The patent changes the diagnostic parameters by introducing phase-specific reference profiles with different capacity-voltage relationships. Instead of using a single fixed reference profile, the system selects and applies appropriate reference profiles based on the identified phase characteristics, enabling accurate diagnosis across different electrode material phases.
2Reliability
If conventional diagnostic methods are applied to multi-phase electrode materials, then the method remains simple to implement, but the overall electrode design becomes significantly distorted from release state
Solution Approach 1:
The patent implements a dynamic diagnostic approach where the reference profile selection is not fixed but adapts based on the identified phase. The system dynamically selects appropriate reference profiles from multiple options based on phase identification, allowing the diagnostic method to adapt to different electrode states while maintaining operational simplicity through automated selection.
Solution Approach 2:
The patent introduces phase identification as an intermediary step between the raw electrode profile and the diagnostic comparison. This intermediary process identifies the phase characteristics first, then selects the appropriate reference profile as a mediator for accurate comparison, ensuring reliable diagnosis without requiring manual intervention.
3Measurement precision
If the electrode profile is used as-is without adjustment, then the diagnostic process is straightforward, but the diagnosis accuracy deteriorates when the battery cell deteriorates over time
Solution Approach 1:
The patent performs preliminary actions by pre-establishing multiple phase-specific reference profiles that represent different degradation states and phase characteristics. These reference profiles are prepared in advance for each phase type, allowing the diagnostic system to directly compare against appropriate references without requiring complex real-time adjustments during the actual diagnosis process.
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 loading amount as a diagnostic factor representing a degradation state of the battery cell based on the second profile.