{"id":10756,"date":"2024-09-23T16:43:43","date_gmt":"2024-09-23T08:43:43","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=10756"},"modified":"2024-09-23T16:43:43","modified_gmt":"2024-09-23T08:43:43","slug":"ele0008","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/ele0008\/","title":{"rendered":"How are photovoltaic welding ribbons produced and how to ensure their quality"},"content":{"rendered":"

Photovoltaic welding ribbon<\/a>The production process has a vital impact on its final quality. The entire process from material selection to finished product delivery needs to be strictly controlled. To ensure the quality of photovoltaic welding ribbons, it is necessary to pay attention to the following key steps and control points:<\/p>\n

1. Selection of raw materials<\/strong><\/p>\n

Selection of copper substrate: The main raw material of photovoltaic welding strip is copper strip. Copper material must have high conductivity and good ductility. The commonly used material is 99.99% high-purity oxygen-free copper, which can ensure that the welding strip has good conductivity and reduce power transmission loss.<\/p>\n

Tin-plated material: The tin-plated layer is the key part of the solder strip, which plays a role in preventing oxidation and improving soldering performance. Generally, high-quality pure tin or tin alloy is used for plating. Whether to use lead-free or lead-free tin-plated materials needs to be selected according to customer needs.<\/p>\n

2. Calendering and stretching<\/strong><\/p>\n

Copper strip rolling: The copper strip is rolled through a rolling mill to process its thickness to the required specifications. This process requires precise equipment and control systems to ensure that the copper strip has uniform thickness and a smooth surface.<\/p>\n

Stretching treatment: The copper strip after calendering will undergo multiple stretching treatments to improve its strength and ductility. This process also requires strict tension control to prevent cracks or deformation of the copper strip during processing.<\/p>\n

3. Cleaning and degreasing<\/strong><\/p>\n

Surface cleaning: Before entering the tinning process, the copper strip needs to be thoroughly cleaned and degreased to remove oil, oxides and other impurities on the surface of the copper strip to ensure that the tinning layer can be evenly attached to the surface of the copper strip.<\/p>\n

Use acid or alkali washing: Acid or alkali washing is commonly used to deeply clean the copper strip, followed by high-temperature water washing and drying to ensure that there is no residual substance on the surface of the copper strip.<\/p>\n

4. Tinning process<\/strong><\/p>\n

Hot dip tinning: After cleaning, the copper strip passes through a molten tin tank, and a layer of tin will be evenly attached to the surface. The thickness of the tinning needs to be precisely controlled according to different product requirements. The tinning temperature, time and purity of the tin liquid directly determine the quality of the solder strip and the welding effect.<\/p>\n

Electroplating tin plating: Another commonly used method is electroplating, which uses electrochemical reaction to evenly plate tin on the surface of the copper strip. This method can better control the thickness of the coating and is suitable for some products with high thickness accuracy requirements.<\/p>\n

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