In 2025, Shandong Tianhe Environmental Technology Co., Ltd. held a technical exchange meeting focusing on portable EL detectors in Weifang, Shandong. The event attracted extensive participation from the photovoltaic industry, research institutions, and end users. The conference, with the theme of "Precision Detection and Intelligent Operation and Maintenance", conducted in-depth discussions on the technological breakthroughs and application scenarios of portable EL detectors.

In the operation and maintenance of photovoltaic power plants, what can be observed with the naked eye is only the appearance. The hidden dangers inside the components, such as microcracks, PID effects, welding defects, etc., are like "silent killers" that unconsciously erode power generation revenue and asset security. The portable EL (Electro Luminescence) detector is a diagnostic tool designed for this purpose, which clearly presents invisible intrinsic defects.

At the meeting, Manager Yu from Shandong Tianhe Environmental Technology Co., Ltd. introduced that the portable EL detector is a photovoltaic module internal defect diagnosis system that integrates high-sensitivity imaging and portable design. It is like equipping operation and maintenance personnel with a pair of "industrial X-ray glasses", which can quickly and non destructively observe the health status of components on site without disassembling them, upgrading the operation and maintenance mode from "passive response" to "active warning and precise intervention". ”

Its technological highlights include:

1. Millimeter level defect identification:It can accurately locate more than 14 types of defects such as hidden cracks, broken grids, fragments, black hearts, and virtual welding, and transform quality hazards that are not visible to the naked eye into visual data.

2. Intelligent analysis system:Built in deep learning algorithms (such as CNN) automatically identify defect types and label their locations, combined with image enhancement techniques (such as histogram equalization and denoising filtering) to improve defect contrast.

3. Portable design:The device is equipped with an infrared camera, a full-time autofocus module, and wireless control function, supporting fast on-site imaging; Equipped with energy storage power supply and Wi Fi module, achieving 24-hour uninterrupted testing and remote data transmission.

This device runs through the entire lifecycle management of photovoltaics, covering five core scenarios:

1. Production line quality inspection:Detect process defects after embedding lamination, welding and other processes, and adjust parameters in real-time to reduce batch quality accidents.

2. Power station operation and maintenance：Quickly screen for issues such as hidden cracks and hot spots in components, assess the health status of the power station, and locate faulty components.

3. Installation acceptance:Detect hidden cracks caused by transportation damage or improper construction to prevent defective components from being connected to the grid for power generation.

4. Scientific research experiments：Assist in the research and performance evaluation of new battery cell processes, and provide data support for material improvement.

5. Second hand component evaluation:Detecting internal damage in recycled components and promoting standardized development of the second-hand market.

This press conference has been a complete success, and we welcome customers who have such needs to come.