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PV Busbar Ribbon Production Line

GRM PV Busbar Ribbon Production Line are designed to continuously process TU1 oxygen-free copper round wire into high-precision tin-coated flat conductive ribbon. The line is suitable for PV interconnection ribbon, busbar ribbon, and reflective busbar ribbon production.
The complete line integrates wire drawing, precision rolling, continuous annealing, flux treatment, hot-dip tin coating, and automatic take-up. It helps PV ribbon manufacturers control width and thickness accuracy, tin coating quality, strip straightness, and winding consistency.
The GRM busbar ribbon production line is approximately 26 m long and 3 m wide, with a total line weight of about 14 tons. The design speed can reach up to 150 m/min, depending on copper wire size, finished ribbon dimensions, tinning speed, and take-up method. Under typical production conditions, the monthly output can reach approximately 60-80 tons.

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Product Description

From Copper Wire to Finished Busbar Ribbon

The PV Busbar Ribbon Production Line mainly uses copper wire as the raw material. The wire is first drawn to the required diameter for rolling, and then formed into flat ribbon through multi-stand precision rolling. After rolling, the copper strip passes through continuous annealing to adjust its mechanical properties, followed by flux treatment and hot-dip tin coating. Finally, the finished ribbon is wound by the automatic take-up system onto spools or pancake coils.

Drawing Machine

The copper wire is drawn through dies to a diameter of 2.6-3.0 mm, ready for rolling.

4 Roll Stand

The round copper wire is rolled into flat ribbon, with controlled width and thickness accuracy.

Annealing

Short-circuit annealing is used with inert gas protection and circulating water cooling to improve the copper ribbon’s mechanical properties.

Tin Coating

Hot-dip tin coating is used. Air knives control the tin layer thickness, and cooling fans help stabilize the surface quality. Single-side tin coating thickness: 0.01-0.025 mm.

Automatic Coil Chang

Optional functions include servo traversing, automatic spool change, automatic cutting, and automatic taping.

Precision Take-up

Spool winding: up to 30 kg.

Pancake coil winding: optional 1-2 kg.

R&D and Patents

Since 2015, GRM has continued to develop manufacturing equipment for PV interconnection ribbon and busbar ribbon. The company has obtained multiple technical patents related to precision rolling, production line integration, and PV ribbon manufacturing processes.

GRM Patented Technologies for PV Ribbon Manufacturing Equipment

Key Features

Continuous production from copper wire input to finished tin-coated busbar ribbon output.
Improved dimensional consistency, coating uniformity, and winding quality.
Tension coordination and automatic take-up help reduce production interruptions and manual intervention.
Supports both standard busbar ribbon and reflective busbar ribbon production for different PV module material requirements.
Provides PV ribbon manufacturers with an integrated production solution focused on process control, product consistency, and production efficiency.

Frequently Asked Questions

1. What is the finished product size range?

Finished width: 3-8 mm.

Finished thickness: 0.2-0.4 mm.

2. What are the tolerance and mechanical property ranges?

Width tolerance: ±0.085 mm.

Thickness tolerance: ±0.01 mm.

Tensile strength: ≥260 MPa.

Yield strength: 90-130 MPa.

3. What tin coating method is used?

The line uses hot-dip tin coating, with full coverage around the ribbon, including both side edges.

4. How are product width and thickness measured?

The fourth stand of the four-stand rolling mill is equipped with two laser measurement systems, one for width measurement and one for thickness measurement. The measurement data can be displayed on the HMI.

5. What materials can be processed?

The PV Busbar Ribbon Production Line is mainly designed for TU1 oxygen-free copper wire. Customized configurations can be provided according to different copper alloys, product dimensions, and special ribbon requirements.

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