Photovoltaic ribbon, also known as tinned copper tape or tinned copper flat wire, is divided into a sink tape and an interconnection strip, which is used for the connection of thousands of photovoltaic module cells. Welding tape is an important raw material in the welding process of PV modules. The general selection criteria are based on the thickness of the cell and the amount of short-circuit current to determine the thickness of the tape, the width of the tape should be the same as the width of the main deletion line of the battery, and the softness of the tape generally depends on the thickness of the cell and the welding tool.
The Structure of PV Ribbon
Below is the structure of the PV ribbon：
①By copper base material: Cure Copper (99.9%), Oxygen-free copper (99.95%), and Purple Copper
②By tin coating layer:
62%Sn 36%Pb 2%Ag
96.5Sn 3.5%Ag and etc.
③By hardness: 1.Soft 2.Extra Soft 3.Ultra Soft 4.Ultra Soft Plus
Tin coated strip processing method
1.Copper Strip cutting—Annealing—Tin coated
2.Copper wire flattening—Annealing—Tin coated
1.Flatness of weld surface after shearing.
2.Integrity of crystal structure.
Burrs on all sides
The performance parameters of Ulbrich and Sveck for PV ribbon
*Please note: The elongation at break of the PV ribbon is related to the hardness of the strip, In general, the softer the strip, the greater the elongation at break.
Raytron products in PV ribbon business
Photovoltaic ribbon is a hot-dip tinned copper conductor that collects current from photovoltaic cells.
Raytron provides oxygen-free copper ( Min 100%IACS) and copper-clad aluminum ( Min 60%IACS) flat wire in a variety burr-free edges such as Square, Natural Round, and Full Round. Yield strength could be reach ＜70Mpa.