First of all, we must first understand what is EL, EL full name Electro Luminescence or electroluminescence, also known as electronic luminescence detection. By using the electroluminescence principle of crystalline silicon, a near-infrared image of crystalline silicon is taken with a high-resolution infrared camera, and the imaged image is analyzed and processed to determine defects of solar cells and photovoltaic modules.
At present, EL detects photovoltaic applications in the photovoltaic industry, such as defect detection of photovoltaic modules, internal defect detection of solar cells, and crack detection of silicon wafers. The portable EL detector is used in photovoltaic modules and photovoltaic power stations to adapt to different environments and different places, so that it can quickly identify and judge internal defects generated by PV modules.
In the production of solar cells, EL detectors can be applied to solar cell extensions to identify internal defects such as black hearts, black spots, broken gates, cracks, and debris that are not easily recognized by machine vision systems. Wuxi Chuangshi New Technology Co., Ltd. is the first in the world to apply EL detection to solar cell sorting machines. In the sorting of cell and silicon wafers, common defects and colors can be identified and judged by machine vision system, but for some internal defects. Machine vision systems are not easy to identify or are easily missed, which leads to misclassification or missed sorting equipment. MVC-GF sorting machine integrates machine vision, EL detection, infrared technology, automation and other technologies, which can realize the identification and judgment of positive and negative defects, color and internal defects of the battery. The detection speed reaches the international level and the detection efficiency. Achieve a substantial increase.
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