{"id":10809,"date":"2024-10-10T16:53:35","date_gmt":"2024-10-10T08:53:35","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=10809"},"modified":"2024-10-10T16:53:35","modified_gmt":"2024-10-10T08:53:35","slug":"ele0026","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/ele0026\/","title":{"rendered":"Relationship between various indexes of photovoltaic welding ribbon and product performance"},"content":{"rendered":"

Photovoltaic welding ribbon<\/a>The various performance indicators directly affect itsPhotovoltaic modules<\/a>The following are several key performance indicators and their relationship with product performance:<\/p>\n

1. Electrical conductivity<\/strong><\/p>\n

Function: Conductivity determines the ability of the soldering tape to conduct current. The higher the conductivity, the more efficient the current transmission, reducing resistance loss and ensuring smoother current flow between batteries.<\/p>\n

Impact: Poorly conductive ribbons can cause power loss and heat generation, reducing the overall power output of the module and potentially shortening the life of the PV cell.<\/p>\n

2. Tensile strength<\/strong><\/p>\n

Function: The tensile strength reflects the ability of the welding strip to resist deformation when subjected to mechanical tension. Especially during the production process and long-term operation, photovoltaic modules will be subjected to certain physical stress.<\/p>\n

Impact: Welding ribbons with too low tensile strength are easily broken or deformed, causing solder joint failure, affecting the current transmission of photovoltaic modules, and may cause battery cells to rupture, reducing the reliability of the modules.<\/p>\n

3. Ductility<\/strong><\/p>\n

Function: Ductility refers to the ability of the solder strip to deform when stretched. The solder strip needs to adapt to the slight deformation of the battery cell during production and installation.<\/p>\n

Impact: Solder ribbons with insufficient ductility are prone to breakage during the welding process or when the battery cell expands or contracts, affecting the stability of the welding point, which may cause damage to the battery cell or interruption of current transmission.<\/p>\n

4. Ribbon width and thickness<\/strong><\/p>\n

Function: The width and thickness of the welding ribbon will directly affect the current transmission capacity and the firmness of the welding. Usually, the width of the welding ribbon is selected according to the width of the main grid line of the battery cell to ensure effective current conduction and thermal management.<\/p>\n

Impact: A soldering ribbon that is too thick may cause excessive stress during welding, increasing the risk of battery cell rupture; a soldering ribbon that is too thin will reduce the current conduction capability and cause power loss.<\/p>\n

5. The thickness of the coating on the solder strip surface (such as the thickness of the tin coating)<\/strong><\/p>\n

Function: The soldering strip is usually tinned on the surface of the copper strip to improve the soldering performance and corrosion resistance. The thicker the tinning layer, the more conducive it is to improving the firmness of the soldering point and preventing the soldering strip from being corroded.<\/p>\n

Impact: If the coating is too thin, it may lead to poor welding, resulting in cold or false welding; if the coating is too thick, it will increase the difficulty of welding and increase production costs. Therefore, the coating thickness needs to be precisely controlled according to the actual process requirements.<\/p>\n

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