Photovoltaic Welding Strip Rolling Mill

The China photovoltaic welding strip rolling mill produced by GRM Rolling Mill factory is a special flat wire product used to connect solar cells in photovoltaic modules. It is composed of copper substrate and surface coating. Copper substrate is usually high-purity oxygen free copper or T2 red copper, with copper content ≥ 99.99% and conductivity ≥ 98%. It has good conductivity and certain strength, which can ensure efficient current transmission.

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Product Description

The durable Photovoltaic Welding Strip Rolling Mill from GRM Rolling Mill supplier integrated machine independently developed by our company is a high-end intelligent equipment specially designed for the photovoltaic industry. It integrates core functional modules such as fully automatic wire-laying system, multi-pass precision rolling, intelligent tension control, continuous annealing and double-station winding.

As the industry-leading high-speed, high-precision busbar integrated machine, this equipment can realize the full-process integrated production from ¢3mm copper raw materials to finished products (width 3~8mm, thickness 0.2~0.45mm), with a maximum operating speed of 250m/min, perfectly matching the stringent requirements of large-scale manufacturing of photovoltaic modules for high efficiency, high precision and high stability.

Typical process flow

1. Flat wire rolling process (applicable to photovoltaic welding ribbon-convex ribbon integrated machine)

Paying off wire - multi-mode wire drawing - precision calendering - online detection and control - single-mode drawing - CNC stripping - high-speed tinning - continuous annealing (nitrogen protection) - constant tension winding

Technical Parameters

PV Ribbon Products	Parameter	Industry Standard	Other Company	GRM
Standard Interconnect PV Ribbon	Coating thickness	±5μm	25±5μm	25±3μm
	Finished product thickness	20.01mm	20.015mm	20.01mm
	Finished product width	±0.05mm	±0.05mm	±0.05mm
	Tensile strength	≥110Mpa	≥150Mpa	≥170Mpa
	Elongation	≥15%	≥25%	≥25%
	Yield strength	≤70Mpa	≤70Mpa	62.68Mpa
	Sickle bend	≤5mm/m	≤4mm/m	≤4mm/m
	Resistivity	0.30Ω* mm/m 0.30Ω*	0.02-0.023Ωmm/m 0.02-0.023Ω	0.0230 Ωmm/m 0.0230Ω
	Aging resistance	-	-	DH2000

Technical advantages

High precision: ±0.01mm thickness tolerance, adapting to the strict standards of photovoltaic welding strips

High efficiency: 250m/min high-speed rolling, high-quality Photovoltaic Welding Strip Rolling Mill provided

Multi-material adaptation: compatible with copper, aluminum alloy, etc., strong scalability

Surface roughness Ra≤0.2μm (reduce the risk of battery cracking)

Typical applications:

• Photovoltaic field: mass production of photovoltaic welding ribbons and busbars to help components conduct electricity efficiently.

• Custom processing of special-shaped busbars (triangular/trapezoidal cross-section)

• Electronic industry: high-precision flat wire processing, suitable for transformers, inductors and other components

Customized design and after-sales service

• Customized service: parameters such as the number of passes, mold material, and drawing speed can be adjusted according to the specific needs of customers.

• Equipment upgrade: support the addition of pass modules in the later stage to meet the needs of capacity expansion or process upgrade.

• Maintenance cost: The more passes, the higher the mold and maintenance costs, but the efficiency of single processing is significantly improved. It is recommended to make a reasonable choice based on the production scale.

Welcome to contact us and get to know more information about the Photovoltaic Welding Strip Rolling Mill!