Copper-Aluminum Composite PV Ribbon & Busbar Ribbon
Copper-Aluminum Composite Interconnect Ribbon
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Composite interconnect ribbon joins solar cells into strings using a copper-aluminum conductor with a solderable surface. Ribbon geometry, coating and mechanical properties need to work with the cell layout and stringer. Send the cell drawing, process window and spool requirements to discuss samples.
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Construction and specification
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| Item | Specification |
|---|---|
| Material construction | Copper-aluminum composite or specified copper base with the coating defined by the cell process |
| Product form | Interconnect ribbon |
| Width range | Common PV ribbon widths; custom dimensions by drawing |
| Thickness range | PV module interconnection thickness range; custom by module design |
| Surface | Tin or solder coating options by soldering process |
| Packaging | Spool, traverse wound spool or customer-specified package |
Specification design factors
Drawing-defined specification
Geometry and performance
- Width, thickness and edge geometry define a narrow flat conductor.
- Metal layers and solder or insulation coatings perform different functions.
- Spool format, winding tension and joining behavior connect the material to the assembly process.
Selection and processing
Interconnect ribbon joins cells. Pad layout, stringing conditions, mechanical condition, camber and spool handling determine the trial specification. Record joint strength and resistance before module-level reliability checks.
Material and form references
Rolled strip, foil and flat wire are defined by material, temper, section and finished-part requirements. Their geometry and test methods differ from those of round wire.
Standards and product formsProduct questions
How does a flat section behave in bending and winding?
Width, thickness and corner geometry define the conductor envelope. Bending about the long and short edges produces different strains and springback. Bare metal and insulated finished dimensions occupy different portions of the available winding space.
Is copper proportion the same as electrical conductivity?
No. Copper proportion describes a mass, volume or area basis. Conductivity describes electrical behavior under stated measurement conditions. The supplied construction identifies both, together with section, material condition and resistance.
How are width and thickness related to the finished part?
The drawing pairs width and thickness and identifies corners, edge condition and temper. Separate width and thickness limits do not establish every combination. A coating or insulation build is recorded separately from the bare metal section.
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- Width, thickness and tolerances
- Edge condition, burr, surface and roll dimensions
- Core and outer-layer metals, each layer or ratio, and mass or volume basis
- Coating alloy and thickness, soldering conditions, cell layout and spool format
- Quantity, spool or coil format, packaging and delivery destination