Small solar panel EL tester
The Small solar panel EL tester is a professional instrument based on the principle of electroluminescence (EL). Utilizing a high-precision imaging system, it enables non-contact, non-destructive, rapid imaging detection and intelligent analysis of various potential defects within solar cell modules that affect performance and reliability. These defects include micro-cracks, broken fingers, black core fragments, shattered cells, sintering defects, low-efficiency cells, shunt resistance issues, and process contamination. It is a key tool for ensuring module production quality and long-term reliability.
Product Features
Core Technology: Electroluminescence Non-Destructive Imaging: Leverages the electroluminescence (EL) principle to image energized solar cell modules. Enables clear visualization of internal microstructures and defects without disassembly or contact, achieving non-destructive testing.
High Efficiency & Precision: 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, broken fingers, poor soldering, black core fragments, etc.). Significantly enhances detection efficiency and accuracy, suitable for online or offline inspection.
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 broken fingers, and other subtle defects. Enables precise defect localization, providing a reliable basis for quality judgment.
Comprehensive Quality Control: Improved Yield Rate: Covers the entire process from raw material acceptance, production process monitoring, finished product final inspection, to power plant operation and maintenance testing. It is a key device for ensuring the long-term reliability and power generation performance of solar modules. By detecting and eliminating defective products early, it effectively reduces production losses and improves product yield and quality.
Technical Specifications
Model: YHEL-1590
Applicable Process: Defect detection for pre & post-lamination modules
Test Specification: monocrystalline, polycrystalline cell modules
Camera Type: YOHA Dedicated Camera
Resolution: EL: 5MP / 24MP
Shooting Mode: Single Camera Mode
Sensitivity: Can detect cracks with width < 0.03mm
Effective Test Area: 1500*900mm
Stabilized Power Supply: 60V/10A
Image Acquisition Time: 1~60s (Adjustable)
Power Supply: 220V/50HZ
Device Dimensions: 1660×940×1050mm
Product Applications
Full-Process Quality Monitoring in PV Module Production: This device is a core quality inspection tool on the production line. It is applied at critical stages such as raw material (cell) incoming inspection, post-soldering/layup process, pre/post-lamination encapsulation, and final finished product 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 Plant Component Receiving Inspection & Installation Quality Check: During PV power plant construction, used for batch sampling or full inspection of incoming solar modules to verify if internal damage like micro-cracks occurred during transportation and handling. It can also be used for re-inspection after modules are installed on racks (installation stress testing) to ensure the installation process caused no damage. This lays a quality foundation for the plant's long-term stable operation, avoiding power generation loss or safety hazards due to hidden defects.
PV Power Plant O&M Fault Diagnosis & Performance Assessment: As a vital diagnostic tool for plant operation and maintenance, used for regular inspections or troubleshooting. When abnormal performance degradation (e.g., hot spots) is detected, EL testing can quickly and visually locate internal defects (such as severe micro-cracks, shattered cells, PID effect, cell failure, soldering failure, etc.), accurately determining the cause and severity of the fault to guide repair or replacement decisions, maximizing plant power generation revenue and asset value.
R&D & Process Improvement Support: In PV module and cell R&D labs and process improvement departments, the EL detector is a key 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 different conditions, it facilitates in-depth research on defect generation mechanisms, distribution patterns, and their impact on performance, providing strong data support for continuously improving module design, optimizing manufacturing processes, and enhancing product lifespan.
