Solid-State Battery Fault Detection via Pressure Distribution
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Solution Overview
Problem
All-solid-state batteries require uniform pressure to prevent lithium metal deposition and volume expansion issues, but uneven pressure application can lead to defects, affecting safety and durability.
Innovation Solution
An all-solid-state battery defect detection apparatus and method that uses pressure distribution measurements at the ends of charging and discharging to detect defects by comparing standard deviation values with predetermined reference values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high pressure is continuously applied to the all-solid-state battery, then energy density and stability are improved, but uneven pressure application causes lithium metal deposition and volume expansion leading to defects
Solution Approach 1:
The patent performs defect detection at predetermined timing points (immediately after fastening the pressurizing jig, at the end of charging, and at the end of discharging) before actual defects cause failure. By measuring pressure distribution in advance at these critical moments, the system can identify potential issues with lithium metal deposition or volume expansion early, allowing for preventive action while the battery is still under controlled pressure conditions.
2Measurement precision
If pressure distribution is monitored continuously, then defect detection accuracy is improved, but measurement complexity and time consumption increase
Solution Approach 1:
The patent implements periodic measurement by monitoring pressure distribution only at specific predetermined timing points: immediately after fastening the pressurizing jig, at the end of charging, and at the end of discharging. This periodic approach captures critical moments when defects are most likely to manifest or change, maintaining high detection accuracy while avoiding continuous measurement that would consume excessive time and resources.
3Reliability
If multiple pressure measurements are taken at different charging states, then defect detection reliability is improved, but device complexity increases
Solution Approach 1:
The system pre-defines three critical measurement timing points: immediately after fastening the pressurizing jig (before charging), at the end of charging (maximum state of charge), and at the end of discharging (minimum state of charge). By establishing these predetermined measurement occasions in advance, the system achieves comprehensive defect detection across different charging states without requiring complex real-time decision-making or additional measurement equipment.
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 detects defects in all-solid-state batteries by analyzing pressure distribution standard deviations, ensuring improved quality and safety by identifying potential issues before they cause significant deterioration.
Implementation Method 1
a surface pressure sensor configured to measure a pressure distribution of an all-solid-state battery
Data Source
AI summary
The present disclosure relates to an all-solid-state battery defect detection apparatus, system, and method. An exemplary embodiment of the present disclosure provides an all-solid-state battery defect detection apparatus including: a processor configured to detect a defect in an all-solid-state battery by using a pressure distribution measurement of the all-solid-state battery at ends of charging and discharging of the all-solid-state battery immediately after fastening a pressurizing jig to the all-solid-state battery; and a storage configured to store data and algorithms driven by the processor.