Lithium-ion battery tab welding diagnosis using electrical reflectometry
Résumé
This paper investigates the use of electrical reflectometry as a non-destructive testing technique to monitor the health status of battery tab welding in a parallel pack configuration. 3D models consisting of cylindrical lithium-ion cells connected by a tab at each extremity through copper welding were developed. Current surface distribution analyses were performed to understand reflectometry signal propagation and to select the optimal setup for increasing reflectometry sensitivity. Then, several defect models with varying severities and locations were created to simulate the progressive loss of material in the welding layer. This work demonstrates the ability of reflectometry-based systems to detect welding degradation in a parallel battery pack configuration, which, to our knowledge, has never been done in the literature.
Mots clés
reflectometry
instrumentation
non-destructive testing
monitoring
structural health monitoring
battery
welding
modelling
3D model
surface distribution analysis
defect
sensitivity
signal propagation
simulation
Diagnosis
Electrical Reflectometry
Lithium-ion cell
Battery Tab Welding
Defect Diagnosis
3D Modeling
Degradation
Solid modeling
Three-dimensional displays
Noise reduction
Spatial resolution
Testing
Conductive
Electric Power
Electric Vehicles
Electrical Signals
Peak Amplitude
Phase Velocity
Reflection Coefficient
Transmission Line
Ground Plane
Electrochemical Cell
Energy Storage Systems
Electromagnetic Simulation
Solder Joints
Time Domain Reflectometry
Small Cracks
Spot Welding
Ultrasonic Testing
Gaussian Pulse
Laser Welding
Signal Bandwidth
Signal Distortion
Injection Port
Current Distribution
Capability Of System
Non-destructive Testing
Parallel Configuration
Cylindrical Cells
Spatial Resolution
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