Non-Destructive Battery Diagnosis Through Resistance–Voltage Profiles
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Solution Overview
Problem
Existing battery diagnosis methods are inadequate for detecting abnormalities in a non-destructive manner, which can lead to performance degradation, fire, and explosion risks due to internal gas generation and electrode imbalance.
Innovation Solution
An apparatus and method that utilize a data obtaining unit to measure resistance and voltage values, generate a profile, and set a criterion range based on these values to diagnose battery abnormalities, including updating the profile and criterion range in real time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional battery diagnosis methods are used, then battery abnormalities can be detected, but the diagnosis may be destructive or inaccurate leading to misdiagnosis
Solution Approach 1:
The patent changes the measurement parameters from traditional single-point measurements to continuous profile measurements of voltage and resistance. By monitoring the change rates (derivatives) of these parameters over time and comparing them against criterion ranges, the system achieves both high measurement precision and reliable diagnosis without destructive testing. The profile data captures the dynamic behavior of the battery, enabling accurate detection of abnormalities while maintaining battery integrity.
2Measurement precision
If continuous monitoring of battery parameters is performed, then diagnosis accuracy improves, but the complexity of the diagnostic system increases
Solution Approach 1:
The patent extracts only the essential features from the continuous profile data - specifically the change rates of voltage and resistance - to form diagnostic criteria. By focusing on these key derived parameters and their criterion ranges, the system maintains high detection accuracy while avoiding the complexity of analyzing entire continuous datasets. This extraction approach simplifies the diagnostic logic while preserving the ability to detect abnormalities.
Solution Approach 2:
The system performs preliminary calculations of change rates and establishes criterion ranges before actual diagnosis occurs. By pre-processing the profile data to extract meaningful features and setting diagnostic thresholds in advance, the real-time diagnosis becomes simpler and more efficient, reducing the computational complexity during actual operation while maintaining high accuracy.
3Reliability
If profile analysis with criterion ranges is used, then non-destructive diagnosis is achieved, but the time required for diagnosis increases
Solution Approach 1:
The patent performs preliminary establishment of criterion ranges based on normal battery behavior profiles before diagnosis is needed. These pre-established criteria can be quickly referenced during actual diagnosis, allowing the system to maintain non-destructive monitoring while reducing the time required for real-time assessment. The heavy computational work of defining normal ranges is done in advance, leaving only simple comparisons during operational diagnosis.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate, non-destructive diagnosis of battery abnormalities by comparing resistance values to a criterion range, preventing misdiagnosis and potential hazards.
Implementation Method 1
a data obtaining unit configured to obtain a resistance value and a voltage value of a battery
Data Source
AI summary
An apparatus for diagnosing a battery according to an embodiment of the present disclosure may include a data obtaining unit configured to obtain a resistance value and a voltage value of a battery; a profile generating unit configured to generate a profile representing a correspondence relationship between the resistance value and the voltage value of the battery obtained by the data obtaining unit; and a control unit configured to set a criterion range in the profile received from the profile generating unit and diagnose whether an abnormality has occurred in the battery based on the result of comparing the resistance value of the battery and the criterion range.