Introduction: The Last Chance Before Assembly
For battery manufacturers, the electrode tab is the foundation of a cell’s electrical integrity. However, ensuring its quality is notoriously difficult. The pre-welding stage represents the final quality gate; if a flawed tab slips through to final assembly, the mistake is irreversible and the entire cell is lost.
UnitX closes this window of risk with an inline AI visual inspection system designed to catch defects in real-time. By automating the detection of structural and process flaws, UnitX helps manufacturers move away from expensive scrap and toward consistent, high-yield production. With the UnitX solution, manufacturers can stop field failures before they happen, ensuring every battery is built to last.
The Challenge: Reflective Foils, Invisible Defects
The project required inspecting copper and aluminum tabs on every cell at full production speed.
The primary roadblock was the material itself. Traditional cameras fail on irregular, highly reflective foils. Standard lighting bounces off the uneven surfaces, creating severe glare and shadows that hide defects and trigger false acceptances.
To secure the line, the customer required the system to overcome this optical noise and reliably detect:
- Structural Flaws: Burrs, folds, and tears that mechanically damage the separator.
- Process Errors: Weld misalignment, strings, and fume residue that cause stacking failures.
Electrode tab pre-weld surface: the high reflectivity and irregular foil geometry defeat conventional single-source machine vision.
The Solution: 150 mm/s Fly-Capture In-line Inspection
UnitX engineered a solution that cuts through the glare and keeps perfect pace with the factory floor.
By processing two cells simultaneously per cycle, the system maximizes production throughput. Dual UnitX OptiX are mounted on a high-precision motion axis, executing synchronized fly-capture at 150 mm/s to sequentially inspect the copper and aluminum tabs on each cell’s surface. All inspection data is instantly uploaded to the facility’s MES. This creates a mandatory quality gateway, ensuring 100% traceability before any cell is cleared for final assembly.
Dual OptiX heads mounted on a shared high-precision motion axis, inspecting two cells simultaneously per cycle.
Vision System Components:
- AI Industrial PC: CorteX × 1 real-time inference and MES data upload for every cell.
- Imaging System: OptiX × 2 high-precision synchronized fly-capture at 150 mm/s .
Results: Zero Escapes at Production Speed
The UnitX inline AI visual inspection system successfully established a 100% automated quality gate, delivering the following validated performance metrics::
- False Acceptance Rate: 0% (Zero defect leakage to final assembly)
- False Rejection Rate: ≤ 0.5% (Maximized yield of acceptable cells)
- Visual System Throughput: 8 PPM
- Static Image Cycle Time: 0.3 s
Real-Time Defect Visualization
Operating at full speed, the inspection system detected critical defects, logging all spatial data directly to the facility’s MES. The system successfully visualizes:
- Structural Damage: Precise bounding of tab tears, folds, and microscopic burrs.
- Process Contamination: Accurate detection of wire strings and welding fume residue.
UnitX AI draws precise defect boundaries in real time and logs each result — defect class, location, and confidence — directly to the MES.
Conclusion
In battery manufacturing, the pre-welding stage is the last accessible point where tab defects can be caught at part cost rather than cell cost. UnitX’s inline AI Visual inspection solution closes that window with 100% coverage at production speed — no sampling, no slowdown, no escapes.
Protect your battery line before assembly.
Contact UnitX to discuss inline electrode tab inspection.
