Solar tabbing wire is an important accessory in photovoltaic module, used to connect the photovoltaic cell and transmit electricity, this accessory is small, but the whole impact can be not small, a good Solar tabbing wire can enhance the efficacy of the whole photovoltaic cell module.
First, the basic concept of Solar tabbing wire
Solar tabbing wire, divided into solar cell interconnection bar and pv busbar, is the electrical connection part of the photovoltaic module. It is mainly used for series or parallel connection of solar cells, and plays an important role in gathering current and conducting electricity. Through Solar tabbing wire, solar cells can be connected together to form a complete circuit loop, thus ensuring the stability of output voltage and power of PV modules.
Second，The structural characteristics of Solar tabbing wire
Solar tabbing wire is mainly composed of base material and surface coating.
Substrate: The substrate of Solar tabbing wire usually adopts different specifications of copper, which requires precise specifications, good conductivity and certain strength. Since the copper substrate itself does not have good soldering performance, the main role of the surface coating is to make the Solar tabbing wire to meet the solderability, and the Solar tabbing wire will be firmly welded to the battery’s main grid, so as to play a good role in current conduction.
Surface Coating: Surface coating is a coating material such as tin alloy that is uniformly wrapped around the surface of the copper substrate according to a certain composition ratio and thickness. These coating materials are usually electroplating method, vacuum deposition method, spraying method or hot dip plating method and other special processes. As the copper substrate itself does not have good welding performance, the main role of the tin alloy layer is to let the Solar tabbing wire to meet the solderability, and the Solar tabbing wire firmly welded to the battery’s main grid line, thus playing a good current conduction.
third，Classification of Solar tabbing wire
According to the direction of product application, Solar tabbing wire can be divided into interconnection bar and pv busbar.
Interconnection bar: Interconnection bar is a tin-coated soldering tape used to connect photovoltaic cells, collect and transmit the current of photovoltaic cells. It is directly welded to the front and rear grid lines of the battery, connecting the positive and negative poles of neighbouring batteries to form a series circuit, which converts the light energy of the battery into electricity and leads it out to the electrical equipment, and at the same time serves to dissipate heat.
pv busbar: pv busbar is a tin-coated soldering tape used to connect PV cell strings and junction boxes to transmit PV cell string current. Photovoltaic cells are connected into battery strings, and the pv busbar connects many battery strings to realise a complete circuit.
Fourth, Solar tabbing wire’s application field
As an important part of PV modules, Solar tabbing wire is widely used in various types of solar modules, such as crystalline silicon modules, thin film solar modules, concentrating solar modules and so on. In these components, Solar tabbing wire plays an important role, providing a reliable connection for series and parallel connection of solar cells and promoting the improvement of photoelectric conversion efficiency.
I believe that through the introduction of this article, you have a deeper understanding of the Solar tabbing wire, for the Solar tabbing wire structure characteristics, classification and application areas have a different understanding. If you need to buy this kind of accessories, you can contact professional Solar tabbing wire suppliers to meet your requirements. A good partner can help you to improve the whole product.
