Wires on solar cells? This is a tin-plated copper strip, which forms a silver-tin alloy layer with the silver paste on the battery during the high temperature welding process, and is connected together. There are generally two ways:
1. On the main battery grid, spray flux and then solder with tinned copper strip. This method is mainly used on automatic welding machines;
2. Use flux to dip the copper strip before soldering. is mainly manual welding.
How to solder solar cells
First, let's talk about how to solder monocrystalline silicon wafers into cells. Generally speaking, the steps of soldering silicon wafers into cells include:
Cleaning the silicon wafer: Firstly, the silicon wafer needs to be cleaned to remove dirt and oxides on the surface.
Heat treatment: Heat treatment can repair defects on the surface of the silicon wafer and improve battery efficiency.
Electrode production: deposit a layer of conductive material on both sides of the silicon wafer to form an anode and cathode.
Welding: Finally, individual silicon wafers are soldered together with welding rods or wire to form a solar cell module. This process usually requires specialized soldering equipment and great care to avoid cracking the silicon wafer.
If it is nickel based, use WE88C low temperature solder and WE88C-F flux for soldering. If it is aluminum or copper, or different welding, use M51 low temperature welding wire. M51-F flux can be used for soldering.
Cells: Cells Cells are generally divided into single-crystal siliconstallin, polycrystalline silicon and amorphous silicon. Monocrystalline silicon solar cells are currently the most developed type of solar cell. Its structure and production process have been finalized, the product. has been widely used in space and on the ground. This type of solar cell uses high purity monocrystalline silicon rods as raw material. In order to reduce production costs, solar cells for ground applications now use solar-grade monocrystalline silicon rods, and the material performance indicators have been relaxed. Some may also use scraps and waste monocrystalline silicon materials from semiconductor device processing and then redesign them into monocrystalline silicon rods specifically for solar cells.