{"id":10725,"date":"2024-09-18T16:35:50","date_gmt":"2024-09-18T08:35:50","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=10725"},"modified":"2024-09-18T16:35:50","modified_gmt":"2024-09-18T08:35:50","slug":"ele0002","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/ele0002\/","title":{"rendered":"What are the points that need to be paid attention to in producing qualified photovoltaic welding ribbons?"},"content":{"rendered":"

Production of qualifiedPhotovoltaic welding ribbon<\/a>It is a complex process involving multiple links and precise control of processes. In order to ensure the quality and performance of photovoltaic ribbons, the following are several key points that require special attention:<\/p>\n

1. Material selection<\/strong><\/p>\n

Purity of copper substrate: High-purity copper is the basis of welding strip production. The conductivity of copper directly affects the current conduction capacity of welding strip. Therefore, copper substrate with a purity of 99.99% or above must be selected.<\/p>\n

Selection of tin-plating materials: The quality and purity of tin are also key factors. The tin-plating material should be free of impurities and have good solderability and anti-oxidation properties.<\/p>\n

2. Dimensional accuracy control<\/strong><\/p>\n

The thickness and width of the soldering tape must be produced in strict accordance with the specifications to ensure that it canPhotovoltaic cells<\/a>The main grid lines of the chip are matched. Any deviation in size will affect the welding effect and current conduction.<\/p>\n

The thickness of the welding ribbon is usually between 0.2mm and 0.5mm, and the width is about 1.5mm to 2mm, which is adjusted according to the type of cell and the design of the photovoltaic module.<\/p>\n

3. Surface finish<\/strong><\/p>\n

The surface of the soldering tape should be smooth and flawless, without oxidation, scratches, bubbles or other surface defects. This can ensure good contact and conductivity during welding, and avoid problems such as cold welding and false welding.<\/p>\n

The tinning layer should be even to avoid uneven coating thickness, which will lead to weak welding or poor contact.<\/p>\n

4. Tin plating thickness<\/strong><\/p>\n

The tin coating is an important component of photovoltaic welding ribbons, and its thickness directly affects welding performance and corrosion resistance. The thickness of the tin coating is generally controlled between 8-12 microns. Too thin will easily affect the welding effect, while too thick will increase the cost.<\/p>\n

The tin plating layer should be evenly distributed and should not be too thick or too thin in any part.<\/p>\n

\"\"