With the rapid development of the new energy industry, the high-current scenario requires increasingly stringent performance of conductive components. With its excellent conductivity, corrosion resistance, and solderability, Fortinnet kobberskinne has become the core component of new energy vehicles, photovoltaic power generation, and other fields.  This article starts from the scientific principles of tin-plating process, combined with 7 technical dimensions, in-depth analysis of the selection criteria and application strategy of the tinned copper busbar, and authoritative data comparison to provide enterprises with landing solutions.

1.  Benefits of tinned copper busbar

• Ledningsevneforbedring og stabilitetsoptimering
• The conductivity of copper itself is as high as 58 S/m, but the conductivity of copper oxide on the surface decreases significantly. After tin plating, tin oxide (SnO₂) has better conductivity than copper oxide (CuO), which can reduce the contact resistance by up to 30%. Experimental data show that the temperature rise of tin-plated copper busbars is 15-20% lower than that of bare copper busbars(under the same current), which significantly reduces power loss.
• Opgradering af korrosionsbestandighed med spring og grænser
  In the salt spray test, the thickness of the tin-plated layer ≥ 25 25μm copper busbar can withstand 1000 hours without corrosion, far more than the limit of 72 hours of bare copper. For example, in coastal photovoltaic power plants, the service life of tinned copper busbars can be extended to more than 15 years, reducing maintenance costs by 40%.
• Forbedring af loddeproces
  Når overfladeruheden (Ra-værdi) af mat fortinning kontrolleres til 0,8-1,6 μm, øges lodningens bindingsstyrke med mere end 50%, og en pålidelig forbindelse kan realiseres uden flux. Tesla Supercharger bruger denne proces til at forbedre svejseeffektiviteten med 3 gange.

2. Blikbelægningsproces

• Bright Tin: Afbalancerer æstetik og funktion
  Velegnet til datacentre strømfordelingsskabe og andre scenarier, der kræver et højt udseende, med en spejlglans (målt i en 60° vinkel) på 90GU eller mere, men loddeapplikationer skal undgås.
• Mat tin: den ultimative løsning til industrielle forbindelser
  Højtemperaturmodstanden kan øges til 200°C ved at plettere et nikkelbasislag (2-5μm tykkelse), som bruges i Ningde Times batterimoduler, hvilket reducerer den defekte loddehastighed til 0,02%.
• Hot-dip tin: en beskyttende barriere til ekstreme miljøer
  In offshore wind power projects,  40μm hot-dip tinned copper busbars are 10 times more resistant to sulfide corrosion than bare copper, which is especially suitable for industrial environments containing H₂S.

3. Belægningstykkelse materiale

• Valg af tykkelse
  • Indendørs tørt miljø: 12,5 μm (opfylder GB/T 2423.17 saltspray test niveau 4 standard)
  • Fugtigt/industrielt miljø: 25 μm (bestået IEC 60068-2-11 svær karaktertest)
  • Kemisk/marint miljø: ≥30μm (se NACE TM0172-standarden)
• Uerstattelighed af C110 rent kobber
  C110 copper busbars with copper content ≥99.9%, conductivity up to 101% IACS, and bending formability 3 times higher than brass are the best substrates for the tin-plating process. An ultra-high voltage substation project was measured to show that the C110 copper busbar of the current-carrying capacity of 22% higher than the alloy copper.

4. Kvalitetskontrol

• Pletteringsensartethedstest
  Røntgenfluorescensspektrometer (XRF) bruges til tykkelseskortlægning, hvilket kræver en afvigelse på ≤±10% (se ASTM B568-standarden).
• Bindingstest
  Bestå bøjningstesten (180° bøjning uden afskalning) og termisk stødtest (-40°C~150°C cyklus i 5 gange) fastsat af ISO 2819.
• Opgradering af miljøbeskyttelsesprocessen
  Førende virksomheder har indført cyanidfri fortinningsprocesser (f.eks. citratsystemer), som reducerer toksiciteten af spildevand med 90% og overholder RoHS 3.0-standarderne.

5. Industriansøgning

1. Højspændingssystem til nye energikøretøjer
   The BYD blade battery module adopts matte tin copper busbars, with contact resistance stabilized at below 0.15 mΩ, supporting 600 A continuous current.
2. PV-invertertopologioptimering
   Sunny Power’s latest string inverter uses tinned copper busbars to increase the power density to 1.5W/cm³, and the efficiency breaks through 99%.

Sammenfatte

Det teknologiske gennembrud af fortinnet kobberskinne busbars is reshaping the competitive landscape of the new energy industry. From the quantum-level optimization of electrical conductivity to the reliability of extreme environments, the scientific selection of plating processes and thicknesses has become the core strategy of cost reduction and efficiency. With the  strategic deployment of high-end materials, the tinned copper busbar will accelerate to aerospace, smart grid and other cutting-edge areas of penetration, opening a new era of conductive components.