When choosing composite copper strip, especially forPhotovoltaic welding ribbon, electronics, electrical, communications, home appliances and other high-performance scenarios, the following key points are crucial:
? 1. Look at the thickness of the copper layer
Too thin a copper layer can lead to:
- Insufficient electrical conductivity
- Welding is difficult
- Easy to expose aluminum and oxidize
Recommended options:
- Products with copper layer thickness ≥ 0.05mm (or copper layer ratio ≥ 20%);
- The surface copper layer shouldContinuous, uniform, no bubbles, no shedding.
? 2. Look at the copper-aluminum bonding process
If the bond is not firm, delamination and breakage may occur during use.
Preferred technology:
- Hot rolling composite or explosive rolling process;
- useVacuum protection environmentorContinuous compounding technology, ensuring that the copper-aluminum interface is metallurgically bonded tightly and the shear force is higher than the industry standard.
? 3. Look at the conductive properties
Electrical conductivity directly affects product heat generation and efficiency.
Evaluation Metrics:
- Electrical conductivity＞65% IACS(The higher the better);
- Low surface resistivity and good stability;
- The measured resistance should meet the customer's design requirements.
? 4. Look at the size accuracy
Small-sized copper-clad aluminum wires are often used in automation equipment, and dimensional tolerance control is very critical.
Recommended standards:
- The thickness tolerance is controlled within ±0.005mm;
- Width tolerance within ±0.02mm;
- No burrs, no warping, neat edges and corners.
? 5. Check solderability and plating performance
When used in scenarios such as photovoltaic welding ribbons and BMS, good welding capabilities must be ensured.
Preferred product features:
- The copper layer can be directly tinned or pre-tinned;
- Good compatibility with flux;
- The welding temperature is stable, and there is no copper layer falling off or bulging.
? 6. Look at the supplier's strength
High-quality products rely on stable equipment and production management.
Recommended options:
- Manufacturers with professional flat wire/composite metal production background;
- haveSmall batch stable supply capability;
- There are third-party certifications, such as ISO, RoHS, REACH, etc.;
- Can provide technical support, fast proofing, customized specification services.
? Recommended brand: Ruichuang copper clad aluminum strip
RaytronWe focus on small-sized copper-clad aluminum flat wires, which have uniform copper layer bonding, excellent conductivity, stable dimensions, and guaranteed mass production and delivery, and are suitable for high-end photovoltaic, energy storage and electronic markets.
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