Solar CellsIn the boardPhotovoltaic welding ribbonIt is a key material in component manufacturing.Photovoltaic modulesThe main function of photovoltaic welding ribbon is to transmit and connect current. The performance of photovoltaic welding ribbon directly affects the efficiency and stability of solar panels. Therefore, it is very important to understand its main function and how to evaluate product performance. The following are the main functions and performance evaluation standards of photovoltaic welding ribbon:
The main function of photovoltaic welding ribbon
Current transmission
Photovoltaic ribbons are used to connect solar cells in series or in parallel to transmit current. Photovoltaic cells generate current by absorbing sunlight, which is transmitted to the busbars of the components through the ribbons and then collected into the entire panel. Therefore, the conductivity of the ribbon is directly related to the efficiency of current transmission.
Connection and fixing of battery cells
Photovoltaic welding ribbons not only transmit current, but also firmly connect the individual cells together through welding. Stable welding can ensure that the components maintain stable electrical performance during long-term use, avoiding cold welding and desoldering caused by loose welding, which in turn leads to power attenuation or component failure.
Reduce resistance loss
The material and thickness of the welding ribbon have a direct impact on the resistance. High-quality photovoltaic welding ribbon can reduce resistance loss, improve the overall current transmission efficiency, and ensure that the solar panel can maximize the use of the electricity generated by photoelectric conversion.
Corrosion and aging resistance
Photovoltaic welding ribbons are used in outdoor environments and must have excellent corrosion resistance and aging resistance to cope with various harsh environments such as high temperature, low temperature, and humidity to ensure the long-term service life of the components.
How to evaluate the product performance of photovoltaic welding ribbon
To judge the quality and performance of photovoltaic welding ribbons, the following key indicators can be used for evaluation:
Electrical conductivity
Electrical conductivity is a core criterion for measuring the quality of photovoltaic ribbons. Ribbons are usually made of highly conductive materials (such asTinned copper strip) to ensure that current can be transmitted efficiently. The better the conductivity of the welding ribbon, the smaller the resistance loss, thereby improving the overall output power of the solar panel.
Material purity
High-quality photovoltaic ribbons are usually made of high-purity copper with a uniform layer of tin on the surface. The high-purity copper material can reduce resistance and enhance conductivity, while the tin coating can prevent corrosion and extend the service life of the ribbon.
Welding firmness
Strong welding can effectively avoid problems such as cold welding and false welding. The welding ribbon must have appropriate hardness and softness to adapt to different welding processes. Manual welding requires a softer welding ribbon to ensure good contact, while automated welding requires a slightly harder welding ribbon for machine operation.
Dimensions
The width and thickness of the soldering tape must match the width of the main grid line of the cell. A soldering tape that is too narrow will result in unstable welding, while a soldering tape that is too wide will increase resistance loss. Therefore, when selecting a soldering tape, it must be determined according to the size specifications of the cell.
Oxidation and corrosion resistance
Photovoltaic welding ribbons are exposed to the external environment all year round, so they need to have good anti-oxidation and corrosion resistance. The thickness and uniformity of the tin plating layer will affect the corrosion resistance of the welding ribbon. High-quality tin plating can effectively prevent the welding ribbon from oxidation, thereby ensuring long-term conductivity.
Ductility and Mechanical Properties
Photovoltaic ribbons need to withstand tensile and bending stress during the welding process, so the ductility and mechanical strength of the ribbons are also key. Overly fragile ribbons are prone to breakage during installation and use, affecting the overall performance of the module.
Coefficient of thermal expansion
The thermal expansion coefficient of the photovoltaic soldering tape should match that of the cell material to avoid cracks or loosening of the solder joints when the temperature changes greatly. Good thermal expansion can improve the durability of the module and reduce stress damage caused by temperature changes.
Quality advantages of Ruichuang photovoltaic welding ribbon
As a professional photovoltaic welding ribbon manufacturer, Ruichuang's products have significant advantages in the following aspects:
High conductivity: Ruichuang photovoltaic welding ribbon is made of high-purity copper with excellent conductivity, which can effectively reduce resistance loss and improve the efficiency of photovoltaic modules.
High-quality tin plating process: The surface tin plating layer is uniform and of appropriate thickness, with excellent corrosion resistance, ensuring the service life of the welding strip in long-term outdoor environment.
Strict quality control: Ruichuang adopts high standards of quality control during the production process to ensure the uniformity of thickness, width, and hardness of the solder strips to adapt to different welding processes and battery cell requirements.
Customized service: For different photovoltaic modules and cells, Ruichuang can provide customized welding ribbon solutions to meet various technical and market requirements.
In short, photovoltaic ribbon is a key component that cannot be ignored in the manufacturing process of solar panels. Its performance is directly related to the current transmission and service life of photovoltaic modules. Selecting high-quality photovoltaic ribbon can not only improve the overall efficiency of the module, but also ensure long-term stable power output.
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