Pure Copper Insulated BusBar
Our pure copper insulated busbars are specifically designed for electrical engineering, battery energy storage systems (BESS), electric vehicle (EV) electric drive systems, and high-voltage power distribution equipment. Utilizing a seamless fluidized bed or dip-coating process, the product features a polymer insulation layer applied to the high-purity copper conductor; this layer is seamlessly bonded, continuous and uniform, and offers excellent flexibility.
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Product Introduction
What is a pure copper insulated busbar?
An insulated flat copper busbar is a high-voltage conductive component made by coating the surface of high-purity copper with a polymeric insulating layer (such as electrical-grade PVC or epoxy resin) using a fluidized bed or dipping process. By combining high electrical conductivity with seamless protection, it offers advantages over traditional heat-shrink tubing, including a gap-free fit, superior voltage resistance, enhanced heat dissipation, and corrosion resistance. The insulating layer is flexible and tightly bonded, making it particularly suitable for complex 3D routing; it is widely used in new energy vehicle battery packs, energy storage cabinets, and high-voltage power distribution systems.
Material Advantages of Insulated Busbars
High-Purity Material
The busbar insulation utilizes T2 grade copper with a copper content of ≥99.90%; its high conductivity effectively minimizes electrical resistance, as well as temperature rise and voltage drop during high-current transmission.
High Dielectric Strength
The dipping busbar for connection is constructed using electrical-grade PVC and epoxy resin; the coating offers high dielectric breakdown strength, ensuring safety and zero leakage in high-voltage environments.
Flame Retardant & Temperature Resistant
Complies with the UL 94 V-0 flame retardancy standard and withstands temperatures ranging from -40°C to +125°C, easily handling harsh environments characterized by extreme cold or heat.
Corrosion & Erosion Resistance
The PVC-insulated copper busbar insulation layer resists acids, alkalis, and salt spray, while fully sealed edges block moisture, effectively preventing copper conductor oxidation and electrochemical corrosion.
Manufacturing Process of PVC Coated Busbars
Precision Stamping and Forming: Utilizes CNC punch presses and precision molds to strictly control tolerances for cutting, punching, and burr formation.
3D Bending: Our battery busbar solution employs CNC equipment to execute complex three-dimensional bends, ensuring a perfect fit within compact enclosure spaces.
Surface Pre-treatment: Dipping the busbar for connection undergoes multiple processes, including degreasing, pickling, and micro-etching activation to significantly enhance the adhesion between the coating and the metal of the insulated flat copper busbar.
Fluidized Bed Dip Coating: Designed for maximum dielectric strength, this PVC-dipped insulated busbar is preheated and immersed in a fluidized bed of suspended powder, creating a seamless, uniform polymer coating.
High-Temperature Curing and Cross-linking: The insulated busbar facilitates full leveling and cross-linking of the coating at high temperatures, creating a tough, seamless, and void-free finish.
Terminal Stripping and Plating: For optimal conductivity, our Insulated Busbar undergoes precise insulation stripping at connection points, followed by tin, silver, or nickel plating to minimize contact resistance.
Applications of Plastic Dipping Copper Busbar
New Energy Vehicles (EV/HEV)
Power battery pack and module connections, BMS systems, battery cluster interconnect busbars, and inverter wiring harnesses.
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Energy Storage Systems (BESS)
Containerized energy storage stations; high-voltage DC busbars for residential and commercial energy storage battery cabinets.
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Power and Distribution Engineering
Smart substations, low-voltage withdrawable switchgear, high-voltage switchgear, and gas-insulated switchgear (GIS).
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Data Centers and UPS
High-density data center rack-mount UPS systems and high-current power distribution systems for UPS.
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Rail Transit and Industrial Drives
Traction converters for electric locomotives; inverters for large-scale wind power and solar PV systems.
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Frequently Asked Questions About PVC Dipping Cover Copper Busbar
What are the advantages compared to heat-shrink tubing for busbars?
Heat-shrink tubing is prone to bunching, thinning, and air gaps at bends, which impairs heat dissipation and creates risks of electrical discharge. In contrast, the dip-coating process ensures a seamless, gap-free fit, offering superior dielectric strength and heat dissipation while accommodating complex 3D geometries.
Can you customize products based on CAD/3D drawings? What is the lead time for prototyping?
We support customization based on formats such as STP, IGES, and DWG. About 10-15 days for samples, 10-15 days for mass production.
Will the coating age or peel off during long-term high-temperature operation?
No. We use electrical-grade polymer materials enhanced with heat-resistant and anti-aging additives. The coating maintains excellent flexibility and adhesion during long-term operation within a temperature range of -40°C to +125°C, without peeling or cracking.
What shipping methods do you support?
We offer flexible international trade terms, supporting FOB, CIF, DDP, and EXW. Depending on your project timeline and budget, you can choose from sea freight (LCL/FCL), air freight, or international express delivery (DHL/FedEx/UPS).
Contact Us
With decades of experience in copper conductor processing and advanced polymer dip-molding technology, we are dedicated to providing global engineering clients with one-stop, customized pure copper insulated busbar solutions. Submit your engineering drawings or specifications to receive an immediate assessment and a custom quote from our professional engineers.
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