Solar Module EL Defect Detector
The Solar Module EL Defect Detector is a critical quality control device that utilizes the principle of electroluminescence (EL) imaging. It operates in a darkroom environment by applying an electric current to a powered solar cell module, causing it to emit light actively. A high-sensitivity infrared camera captures the internal luminescence image, enabling non-contact, non-destructive automatic identification, localization, and classification of internal microscopic defects within the module. These defects include micro-cracks, fragments, finger interruptions, cold soldering, black core cells, sintering defects, material inhomogeneity, and more.
Product Features
Core Technology: Electroluminescence Non-Destructive Imaging: Leverages the electroluminescence (EL) principle to image powered solar cell modules. Clearly visualizes internal microscopic structures and defects without disassembly or contact, enabling non-destructive inspection.
High Efficiency & Accuracy: Automated Intelligent Recognition: Equipped with a high-sensitivity infrared camera and professional image processing software. Capable of automatically and rapidly scanning, capturing images, and intelligently identifying, locating, and classifying various complex defects (such as micro-cracks, fragments, finger interruptions, cold soldering, black core cells, etc.). Significantly enhances inspection efficiency and accuracy, suitable for online or offline detection.
High-Resolution Imaging: Precise Defect Localization: Employs a high-resolution imaging system combined with a darkroom environment design. Ensures captured EL images possess exceptional clarity and contrast, clearly revealing micron-level cracks, fine finger interruptions, and other subtle defects. Achieves precise defect localization, providing reliable basis for quality judgment.
Comprehensive Quality Control: Enhanced Yield Rate: Covers the entire process from raw material acceptance, production process monitoring, finished product final inspection, to power station operation and maintenance inspection. A key device for ensuring the long-term reliability and power generation performance of solar modules. Effectively reduces production losses and improves product yield and quality by early detection and elimination of defective products.
Technical Specifications
Model: YHEL-2400
Applicable Process: Defect detection for pre-lamination and post-lamination components
Testing Specification: Mono-crystalline, Poly-crystalline cell modules
Camera Type: YOHA Dedicated Camera
Resolution: 24 million/48 million pixels
Shooting Mode: Single/Dual Camera Mode
Sensitivity: Detects cracks with width less than 0.03mm
Effective Testing Area: 2600*1500mm
Stabilized Power Supply: 60V/20A
Image Acquisition Time: 1~60s (Adjustable)
Power Supply: 220V/50HZ
Equipment Dimensions: 2900×1940×1155mm
Product Applications
Full-Process Quality Monitoring in PV Module Production: This device is a core quality inspection tool on production lines, applied at critical stages such as raw material (cell) incoming inspection, post-soldering/layup, pre/post-lamination encapsulation, and final finished product shipment inspection. By detecting internal defects in real-time and non-destructively, it strictly controls quality at each stage, preventing defective products from flowing into the next process or reaching customers, significantly improving production yield and product reliability.
PV Power Station Component Receiving Inspection & Installation QC: Used during the PV power station construction phase for batch sampling or full inspection of delivered solar modules, verifying if internal damage like micro-cracks occurred during transportation or handling. It can also be used for re-inspection after modules are mounted on racks (installation stress testing) to ensure the installation process caused no damage, laying a quality foundation for the long-term stable operation of the power station and avoiding power generation loss or safety hazards due to hidden defects.
PV Power Station O&M Fault Diagnosis & Performance Assessment: As an essential diagnostic tool for power station operation and maintenance, used for regular inspections or fault troubleshooting. When abnormal performance degradation (e.g., reduced output) or issues like hot spots are detected, EL inspection can quickly and visually locate internal defects (such as severe micro-cracks, fragments, PID effect, cell failure, soldering failure, etc.), accurately determine the cause and severity of the fault, and guide repair or replacement decisions to maximize power generation revenue and asset value.
R&D and Process Improvement Support: In R&D laboratories and process improvement departments for PV modules and cells, the EL detector is a critical device for evaluating the reliability of new materials, structures, and processes (e.g., novel cell technologies, different soldering/encapsulation processes). By comparatively analyzing EL images of modules under various conditions, it facilitates in-depth research on defect formation mechanisms, distribution patterns, and their impact on performance, providing robust data support for continuously improving module design, optimizing manufacturing processes, and enhancing product lifespan.
