01 Preface
In the production of new energy batteries, as the first line of defense for power battery safety, the weld depth quality of top cover welding is directly related to the battery:
- Sealing: Prevent electrolyte leakage and avoid the risk of thermal runaway;
- Structural strength: Withstand the pressure of internal gas expansion and ensure cycle life;
- Electrical performance: Poor welding may lead to increased internal resistance, affecting charge and discharge efficiency.
Traditional sampling inspection methods are difficult to fully control these risks, while the NewOCT weld depth detection system one-stop solution, through synchronous welding and detection, has achieved an upgrade from “passive sampling inspection” to “active defense”.
02 NewOCT Weld Penetration Detection System One-Stop Solution: Analysis of Three Core Technologies
- Optical Coherence Tomography (OCT)
- Industrial-grade “perspective eye”: Using a near-infrared wavelength laser light source, it scans the welding pool in real-time with strong anti-interference ability. The axial resolution reaches 0.02mm (20μm), the maximum measurement range is ≥12mm, and the weld penetration detection accuracy is ≤10%, which can accurately capture weld penetration data;
Bottom: Metallographic Figure 2
NewOCT Penetration Detection System
- Non-destructive testing: Non-contact measurement, which does not affect the welding process and avoids material loss caused by traditional cutting inspection.
2. Integrated Design of Fixed-Focus Welding System
- Laser welding synchronous control: Compatible with single-mode/multi-mode/annular spot lasers and can withstand 12kW high-power welding;
- Supports multiple battery models: Compatible with full inspection of weld penetration for prismatic/blade/cylindrical battery sealing welds.
- Empowered by Intelligent Software Algorithms
- High-Speed Acquisition: Supports real-time detection at a welding speed of 400mm/s, meeting the beat requirements of power battery production lines;
- Easy Operation: Detection parameters can be quickly switched for different battery models (prismatic/blade/cylindrical), reducing the operation threshold.
03 Implementation Value: From “Probabilistic Qualification” to “Reliability of Each Piece”
1.Cost Reduction and Efficiency Improvement: Reduces material waste from sampling inspection and rework costs, saving over 30% of labor costs per production line annually;
2.Risk Prevention and Control: Intercepts defective products in real-time to avoid batch scrapping (such as potential battery cells with weld penetration less than 10%);
3.Process Optimization: Continuously improves yield by tracing the correlation between welding parameters and quality through historical data.
04 Conclusion
The NewOCT system upgrades traditional sampling inspection to process-controllable real-time quality monitoring through synchronous welding and detection technology. Against the backdrop of the new energy battery industry accelerating towards zero-defect manufacturing, this technology provides a more reliable weld penetration quality assurance solution for top cover welding.
