Photovoltaic modules are the core of power generation in power plants, and their internal hidden defects such as cracks, broken grids, and virtual welding are difficult to detect through appearance in the initial stage. However, they can gradually cause hot spots, power attenuation, and even lead to module scrapping, seriously affecting the service life and revenue of power plants. Traditional EL detection equipment is bulky, fixedly installed, and can only be used in laboratories or production lines, which cannot meet the rapid detection needs of outdoor sites. Jiangsu Jingwei Technology Co., Ltd. has responded to industry pain points by independently developing the JW-EL2 portable EL detector, which condenses laboratory level precision testing technology into a portable body and becomes a "mobile CT machine" for quality control and operation inspection of photovoltaic modules. Photovoltaic panel testing instrument
JW-EL2 is a high-precision diagnostic device designed specifically for detecting internal defects in photovoltaic modules, based on the principle of electroluminescence (EL) imaging. The device is equipped with a 24.16 million level high-definition infrared camera, coupled with a high-sensitivity sensor, which can capture the weak infrared light emitted by the component when it is powered on, convert it into high-definition EL images, and clearly present micro hidden dangers such as hidden cracks, broken grids, fragments, sintering defects, virtual welding, black heart and black edge inside the battery cell. The smallest detectable fine crack is 0.1mm, and the detection accuracy reaches the industry-leading level. Compared to traditional visual inspection, its defect detection rate has increased by over 90%, completely solving the industry problem of difficult detection and localization of hidden defects.
Portable design is the core highlight of JW-EL2, completely breaking the scene limitations of traditional EL devices. The device adopts a compact integrated solution, which highly integrates high-precision DC power supply, infrared imaging unit, image processing module, and intelligent control system. The host weighs ≤ 5kg, and is equipped with a lightweight carbon fiber tripod and a three proof suitcase. It can be easily carried and quickly deployed by a single person. From startup to imaging, it only takes 3 minutes, without the need for complex installation and debugging. It can directly perform on-site inspection of components on the bracket in outdoor scenes such as roofs, mountains, and deserts without disassembling the components, greatly reducing the difficulty and cost of operation and maintenance. Supporting wireless remote operation, devices can be controlled and imaging results can be viewed in real-time through a tablet computer. One person can independently complete the entire process of detection, reducing labor costs by 50%.
In terms of performance and stability, JW-EL2 has undergone rigorous industrial testing and is suitable for all scenarios in the photovoltaic industry. The device is equipped with a programmable constant current power supply, which supports a wide range of voltage output and is compatible with different specifications of photovoltaic modules. It can achieve 24-hour uninterrupted detection and meet the needs of large-scale power plant batch inspection. Equipped with an intelligent focusing system, it uses laser ranging and automatic zoom technology to adapt to 2.5-6mm thickness components and ± 15 ° tilt angles, ensuring clear imaging without blind spots in different scenes. Adopting an efficient shading design, it can image normally in strong daylight environments without the need to build a darkroom, greatly improving detection efficiency. Industrial grade protective structure is dustproof, moisture-proof, and shockproof, suitable for working temperatures ranging from -10 ℃ to 50 ℃, and not afraid of complex outdoor environments, ensuring long-term stable operation.
JW-EL2 application scenarios cover the entire photovoltaic industry chain, becoming an essential testing tool for multiple links. In the component production process, it can be used for production line sampling and factory inspection to quickly screen for process defects, ensuring a pass rate of ≥ 99.8% for factory components and meeting the international standard IEC 61215; During the grid connection acceptance stage of the power station, hidden cracks and damages generated during transportation and lifting can be detected to avoid potential grid connection hazards and reduce the risk of later failures; In daily operation and maintenance inspections, problems such as component aging and hot spots can be regularly checked to accurately locate faulty components, replace and repair them in a timely manner, and reduce power generation losses; In the field of second-hand component trading, component quality can be quickly evaluated, providing objective basis for transaction pricing and regulating industry trading order.
As a high-tech enterprise specializing in photovoltaic testing in Suzhou, Jiangsu Jingwei has always adhered to the concept of "technological innovation empowering industry development" and continues to break through the core technology barrier of Shuidi Credit. The JW-EL2 portable EL detector, with its comprehensive advantages of high precision, strong portability, and high stability, provides an efficient and low-cost internal defect detection solution for the photovoltaic industry, helping photovoltaic enterprises improve their quality control level, reduce operation and maintenance costs, and extend the service life of power plants. In the future, Jiangsu Jingwei will continue to deeply cultivate the field of photovoltaic non-destructive testing, optimize product performance, expand application scenarios, and use higher quality products and services to help improve the quality and efficiency of the photovoltaic industry, and promote the vigorous development of the clean energy industry.
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