Custom 18650/21700/26650/32650 Optional Spacing Big Current Copper Nickel Sheet Copper Nickel Busbar Copper Bus Bar

Product Description Supplement – Copper/Aluminum Alloy Grounding Busbar & Terminal Busbar

The copper grounding busbars and terminal busbars are manufactured from high-purity oxygen-free copper (CU ≥ 99.95%) or H62/H65 brass, ensuring long-term reliability under high current loads and harsh environmental conditions through the following critical processes:

Manufacturing Process

● Raw material: First-grade electrolytic cathode copper or premium brass ingot strictly controlled for harmful impurities (S, P, Bi, Pb, etc.).
● Large-tonnage extrusion followed by multi-pass cold drawing to achieve refined grain structure and fully dense microstructure without lamination or cracks.
● Precision CNC machining: hole position tolerance ±0.05 mm, flatness ≤ 0.03 mm/m, surface roughness Ra ≤ 1.6 μm.
● Plating options: High-quality silver plating (Ag 8–15 μm) or tin plating (Sn 10–20 μm), meeting GB/T 5270 Class 1 adhesion requirements; salt-spray test ≥ 1000 h without red rust or white spots.
● Full traceability: Each busbar is delivered with material certificate, plating thickness report, dimensional inspection report, and unique QR code for complete production history tracking.

Quality Control

● 100% electrical conductivity test (≥ 98% IACS), 100% dimensional inspection, 100% eddy-current plating thickness verification.
● Third-party test reports (SGS/CTI) available with each batch upon request.
● Temperature-rise test: ≤ 45 K at 1.2× rated current for 4 hours per IEC 61439.
● Short-time withstand current test: Verified for 50 kA/1s, 65 kA/1s, 100 kA/1s and higher levels.
● Strict adherence to IATF 16949 quality management system; all critical processes under SPC with Cpk ≥ 1.67.

Widely applied in utility-scale substations, data centers, rail transit systems, industrial plants, and large wind/photovoltaic inverter grid-connection cabinets where safety and reliability are paramount. The product series has been supplied in volume for consecutive years to leading customers including State Grid Corporation of China, China Southern Power Grid, CRRC, Huawei, Sungrow, BYD, and other industry leaders.