Battery Tab Diagnosis Using X-Ray Diffraction Profiles
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Solution Overview
Problem
Existing battery technologies lack an effective method to accurately diagnose disconnection of internal electrode tabs, which can lead to performance deterioration and safety hazards such as fire or explosion.
Innovation Solution
An apparatus and method utilizing X-ray diffraction analysis to generate graphite profiles for each negative electrode tab during battery discharge, determining charge and discharge behaviors, and diagnosing the battery state based on these profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery diagnosis is performed by connecting to a battery management system or vehicle control unit, then diagnostic capability is provided, but the apparatus requires complex communication protocols and may not access all battery parameters
Solution Approach 1:
The patent uses communication circuitry as an intermediary component that can operate in multiple modes: connecting to external systems (BMS/VCU) when available, or directly reading battery terminal voltages when external connection is unavailable. This intermediary approach allows the apparatus to bypass complex communication protocols by directly interfacing with battery terminals, thereby reducing dependency on proprietary communication protocols while maintaining diagnostic capability.
2Measurement precision
If battery voltage is measured using a multimeter or voltmeter, then voltage measurement is achieved, but the measurement process is time-consuming and requires manual operation
Solution Approach 1:
The diagnosis apparatus performs automatic voltage measurement and processing without requiring manual operation. The voltage detection circuit automatically measures terminal voltages, the processor automatically calculates state of charge and state of health parameters, and the system automatically generates diagnostic results. This self-service automation eliminates the time-consuming manual measurement process while maintaining measurement precision through consistent, repeatable automated measurements.
Solution Approach 2:
The patent replaces manual mechanical measurement operations with automated electronic measurement and processing. Instead of manually connecting multimeter probes and reading displays, the system uses electronic voltage detection circuits coupled with digital processing to automatically measure, calculate, and display battery parameters, thereby reducing measurement time while maintaining accuracy.
3Measurement precision
If battery state of charge and state of health are calculated using complex algorithms, then diagnostic accuracy is improved, but computational requirements and processing time increase
Solution Approach 1:
The patent applies a pragmatic approach to algorithm complexity by using calculation algorithms that are sufficiently accurate for diagnostic purposes without being overly complex. The system calculates state of charge based on terminal voltage and state of health based on voltage changes over time, using algorithms that balance accuracy with computational efficiency. This partial action approach provides adequate diagnostic accuracy while minimizing unnecessary computational energy consumption.
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
Accurately diagnoses the state of the battery, including disconnection of negative electrode tabs, in a non-destructive manner, thereby preventing potential accidents.
Implementation Method 1
a voltage detection circuit configured to detect a voltage between a positive terminal and a negative terminal of the battery
Data Source
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AI summary
An apparatus for diagnosing a battery according to an embodiment of the present disclosure includes a discharging unit electrically connected to a battery and configured to discharge the battery; an X-ray diffraction analyzing unit configured to output an X-ray toward a plurality of negative electrode tabs included in the battery and generate a graphite profile for each of the plurality of negative electrode tabs based on the output X-ray; and a control unit configured to determine a charge and discharge behavior of each of the plurality of negative electrode tabs based on the generated plurality of graphite profiles, and diagnose the state of the battery based on the determined plurality of charge and discharge behaviors.