Battery Electrode State Diagnosis via Differential Profile Peak Comparison
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Solution Overview
Problem
Existing battery diagnosis technologies are destructive and pose safety risks, making it difficult to assess the state of electrodes accurately.
Innovation Solution
A non-destructive battery diagnosis apparatus and method that analyzes the differential profile of voltage and differential capacity to determine the state of the positive electrode by comparing target peaks with reference peaks, allowing for accurate diagnosis and setting appropriate usage conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If battery disassembly is performed to directly check electrode state, then measurement precision is improved, but safety risks and device complexity increase
Solution Approach 1:
The patent introduces differential capacity analysis as an intermediary method to indirectly assess electrode state without direct physical contact or disassembly. By analyzing the relationship between voltage and capacity changes during charging/discharging cycles, the system derives diagnostic information about electrode conditions through electrical measurements rather than physical inspection, thus eliminating safety risks associated with battery disassembly while maintaining diagnostic accuracy
2Object-affected harmful factors
If non-destructive diagnosis method is used, then safety is improved, but measurement precision deteriorates
Solution Approach 1:
The patent transforms the diagnosis approach by changing from direct physical measurement parameters to electrical parameter analysis. Specifically, it uses voltage and capacity parameters during normal charging/discharging operations to derive differential capacity characteristics that reveal electrode state. This parameter transformation enables accurate non-destructive diagnosis by extracting diagnostic information from routine operational data rather than requiring specialized intrusive measurements
Solution Approach 2:
The system performs preliminary characterization of the battery's differential capacity profile during normal operation before any diagnostic decision is made. By establishing baseline voltage-capacity relationships and identifying characteristic peaks during standard charging/discharging cycles, the system prepares diagnostic reference data in advance, enabling accurate comparison and diagnosis without requiring additional intrusive testing or disassembly operations
Data Source
AI summary
An apparatus for diagnosing a battery includes a profile obtaining unit configured to obtain a differential profile representing the corresponding relationship between a voltage of a battery and a differential capacity for the voltage; and a control unit configured to determine a target peak from the differential profile, determine a first comparison result that compares the voltage between a reference peak of a reference profile preset for the battery and the determined target peak and a second comparison result that compares the differential capacity between the reference peak and the determined target peak, and judge a state of the battery based on the first comparison result and the second comparison result.