Copper Foil Battery Grade

Description

1. Product Overview

This product is high-precision, battery-grade copper foil, engineered specifically as the anode current collector for lithium-ion batteries. Its primary industrial use lies in electric vehicle (EV) batteries, energy storage systems (ESS), and consumer electronics. The key value proposition is ultra-low surface roughness and high tensile strength, enabling faster charge/discharge cycles and improved energy density. As global demand for electrification accelerates, securing reliable battery-grade copper foil is a strategic imperative for cathode and cell manufacturers aiming to reduce failure rates and optimize electrochemical performance.

2. Key Specifications & Technical Characteristics

• Chemical Composition: Cu ≥ 99.98% (balance trace elements: O, S, P controlled to <50 ppm)

• Purity Grade: Battery-grade (Grade A – GB/T 5230-2020 / ASTM B152 compliant)

• Thickness Range: 6µm, 8µm, 10µm, 12µm, 15µm (±0.2µm tolerance)

• Tensile Strength: ≥ 300 MPa (annealed) / ≥ 450 MPa (rolled)

• Elongation: ≥ 3.5% (at room temperature)

• Surface Roughness (Ra): ≤ 0.4 µm (shiny side) / ≤ 0.6 µm (matte side)

• Oxidation Resistance: ≤ 48 hours at 150°C in ambient air (no visible discoloration)

• Physical Form: Solid roll, slit edge (no burrs)

• Roll Width: 300 mm – 1300 mm (custom slit widths available)

• Core Inner Diameter: 76 mm or 152 mm (paper or plastic core)

• Packaging Options: Vacuum-sealed moisture barrier bag + wooden spool case + desiccant; export-worthy plywood crates with edge protectors

• Shelf Life: 12 months when stored below 30°C / ≤60% RH in original unopened packaging

3. Core Industrial Applications

• Primary Industries: EV lithium-ion battery manufacturing, grid-scale ESS, high-drain 3C electronics (smartphones, drones, power tools)

• Specific Use Cases:

  • Anode current collection in NMC, LFP, and NCA cells

  • High-speed roll-to-roll electrode coating lines (slurry compatibility optimized)

  • Tab welding for prismatic and cylindrical cell assemblies

• Performance vs. Alternatives:

  • Superior to standard electrolytic copper foil due to double-side treated surface (enhanced adhesion to anode paste, reducing delamination)

  • Lower internal resistance than rolled annealed foil, enabling 15–20% faster charging in field tests

  • Higher elongation reduces cracking during cell stacking/jelly-roll winding → fewer short circuits and longer cycle life (≥2000 cycles at 80% DOD)

• Cost Advantage: Reduced scrap rate during slitting (≤0.5% edge burr rejection) lowers total landed cost for high-volume cell producers

4. Competitive Advantages

• Quality Consistency: ISO 9001:2025 certified process control; each batch subjected to EDS composition analysis, tensile pull test, and 10x microscopic edge inspection. Lot-to-lot variability <1.5% CV.

• Supply Reliability: Dual-source raw copper cathode supply (Chile, Japan) with six-month buffer inventory at three regional hubs (Asia, Europe, North America).

• Logistics Capability: Incoterms 2026-ready (CIF, FOB, EXW); expedited air freight available for sample approvals (5-day delivery globally).

• Price Competitiveness: Direct from integrated rolling mill – no intermediary markup. Volume-based pricing indexed to LME copper with a fixed conversion premium.

• Sustainability: 92% recycled process water; 30% post-industrial recycled copper content; compliant with EU Battery Regulation (2024/3082) and Conflict Minerals reporting.

• Technical Support: Full data sheet, MSDS, weldability matrix, and roll gap simulation tool provided on request. Dedicated application engineer assigned per tier-1 account.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20 MT (single thickness, slit width within ±1 mm)

• Loading Capacity per 20ft Container: 22 MT (palletized, with humidity-controlled liner)

• Loading Capacity per 40ft HQ Container: 26 MT (max roll width 1200 mm to optimize stacking)

• Lead Time: 14 working days after LC or advance payment for stock items; 30 days for custom thickness/width

• Sampling: 1 kg sample roll available for qualification (free freight for first 10 qualified OEMs)

For immediate quoting or technical qualification, submit your cell design specifications and annual volume forecast.