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Copper clad aluminum strip is a composite conductor material.Photovoltaic welding ribbon, cable conductors, electrical connections and other fields. In order to ensure itsPerformance, reliability and security, copper clad aluminum strip needs to meet a series ofKey technical parameter requirements:

?? Main technical parameter requirements of copper clad aluminum strip

1. Structural parameters

• Total thickness tolerance：±0.003mm～±0.005mm（high precision grade）
• Strip width tolerance：Within ±0.05mm
• Copper layer thickness:
  • Standard type: ≥0.03mm
  • Photovoltaic ribbon/high-demand applications: ≥0.05mm
• Copper layer uniformity：The copper layer thickness is evenly distributed, with a deviation of <±10%

2. Conductive properties

• Conductivity：≥60% IACS (commonly 62~65% IACS)
• Resistivity：≤0.028Ω·mm2/m (copper clad aluminum overall resistivity)
• Continuity test: No broken circuit or broken copper layer in the whole belt

3. Combination performance

• Copper-aluminum peel strength:
  • ≥10N/cm (normal requirement)
  • ≥12N/cm (high-end products such as photovoltaic welding ribbons)
• Interlayer bonding method: Use continuous hot pressing or calendering diffusion bonding to avoid using adhesives and other methods that reduce performance

4. Mechanical properties

• tensile strength：≥80MPa (annealed state)
• Elongation：≥20%
• Bending times: Repeated 180° bending ≥10 times without cracking or delamination

5. Heat treatment status

• Available:
  • Full soft state (annealing): Suitable for welding and bending processes
  • Semi-hard：Suitable for cable conductor reinforcement structure

6. Surface quality

• Smooth and clean without oxidation, scratches, delamination, peeling, or crushing
• Available upon request: tinned/glossy/reflective/blackened surface

? Typical requirements for technical parameters in application areas (brief examples)