Import 35um Ed Copper Foils For Li-Ion Battery — Buy in Bulk from Supplier in China

BeiJing CN-FT JOVI Technology & Trading Co., Ltd supplies 35 micrometre electrodeposited copper foil engineered as current collector substrate for lithium-ion battery cells. The 35 um thickness targets the balance between electrical conductivity, mechanical handling strength, and active material loading efficiency in prismatic and cylindrical cell designs. ED copper foil for battery application is typically produced through acid copper electrodeposition onto rotating titanium drums, followed by surface roughening and anti-oxidation treatment to promote adhesion to carbon-based anode slurries. The supplier states high purity copper without specifying ASTM or JIS grade, and highlights adhesion and flexibility as key performance attributes.

Battery-grade ED copper foil at this thickness must maintain tensile strength sufficient to survive high-speed coating lines and calendaring operations without tearing or edge curl. Typical industry values for 35 um foil range from 300 to 450 MPa ultimate tensile strength with 3 to 8 percent elongation at break, though these are standard ranges rather than confirmed supplier data. Surface topography, often quantified as Rz or Ra roughness, determines bonding to polyvinylidene fluoride or styrene-butadiene rubber binders in the anode formulation. The supplier mentions compatibility with various cell designs, which implies availability in standard widths for wound cylindrical and stacked prismatic constructions.

Primary applications span consumer electronics, electric vehicles, and energy storage systems where lithium-ion chemistry dominates. Smartphone, laptop and power tool battery packs use similar foil specifications, while automotive cells demand higher lot consistency and traceability. The supplier cites ISO and SGS certifications without detailing scope or certificate numbers, and mentions flexible MOQ and competitive pricing without figures. Buyers should confirm whether the foil is supplied with single- or double-side roughened finish, whether anti-oxidation passivation is organic or inorganic, and whether each coil carries lot traceability data including thickness profile mapping and tensile test results.

BeiJing CN-FT JOVI Technology & Trading Co., Ltd is based in Shijing Shan District, Shixing Street, Beijing 100041, placing it within the capital's administrative zone rather than a traditional copper processing region such as Jiangsu or Anhui. The supplier holds an imported tier designation and harbour trust tier on the platform, which indicates some level of business registration verification but does not confirm manufacturing ownership or technical audit status. Response rate and average response hours are both shown at zero, so buyers should initiate direct contact to assess English-language capability, technical knowledge depth, and responsiveness before relying on this channel.

The company profile available from the source does not state whether BeiJing CN-FT JOVI is a manufacturer, trading company, or hybrid entity, nor does it reveal year of establishment, registered capital, production capacity, number of employees, or named battery industry customers. There is no mention of in-house electrochemical testing capability, cleanroom slitting facilities, or participation in specific battery supply chain qualification programmes such as those required by major cell makers. Buyers should request a factory audit report, quality management system certificate scope, and evidence of supply to tier-one or tier-two cell manufacturers before committing to volume orders.