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Application
- Aerospace & Aviation
- Low-Voltage Electrical (Electric Brush Wires）
- Chemical & Metallurgical Engineering Equipment
- Industrial Machinery & Equipment Clusters
- Superconducting Technology Applications
- Rail Transit Equipment
- Smart Grid & Power Transmission/Distribution Applications
- New Energy Wind Power
- Power Storage Equipment
- New Energy Vehicle Systems
- Products
High-Performance Rigid Copper Busbar with Polyimide Film Insulation - China Suppliers and Factory
Product Advantages
Product Display
Operating Conditions
-70℃ to +260℃ (PI film)
≤95% non-condensing
UL94 V-0
EV battery packs, aerospace power, high-temperature industrial equipment, precision electronics, nuclear industry, etc.
With single-layer thickness 0.05-0.125mm, withstand voltage 7500V-18000V (AC/DC for 1 minute). Higher for multi-layer stacking. Reports available upon request.
Maintenance Instructions
- Inspect PI film surface for scratches, peeling, or damage every 6 months.
- Clean with dry soft cloth or anhydrous alcohol; avoid strong acids/alkalis.
- Prevent sharp objects from scratching the film-mechanical damage reduces insulation.
- Store in dry, dark environment for long-term preservation.
Service Life
Designed service life ≥15–20 years (depending on mechanical wear and thermal cycling). PI film itself rarely ages, but sharp burrs on copper edges must be removed to avoid piercing the film.
After-Sales Service
Contact Us
Zhejiang Bridgold Copper Tech Co., Ltd. is a professional leader China copper braided shunt, copper braided ground strap, copper braided connector, Copper Braided Busbar, rigid copper busbars manufacturers and suppliers with high quality and low price. Welcome to contact us.
Frequently Asked Questions (FAQ)
Polyimide (PI) film offers ultra-thin insulation (0.05–0.125mm) with higher dielectric strength (>150kV/mm), broad operating temperatures (-70℃ to +260℃), and exceptional chemical and radiation resistance, all while saving significant physical space compared to bulkier coatings.
Yes. The smooth surface and high dielectric breakdown capability of the PI film allow direct laminated stacking, which is ideal for compact power distribution units, battery pack modules, and multi-layer busbar systems.
We utilize premium high-conductivity copper such as C11000 (ETP) and C10100 (OFHC) with electrical conductivity ratings of ≥98% IACS to ensure minimal resistance and optimal thermal performance.
A single 0.05–0.125mm PI layer easily withstands 7500V to 18000V AC/DC for 1 minute. The insulation meets UL94 V-0 flame resistance standards, and certified test reports are available upon request.
Yes. Bridgold provides fully customized busbar fabrication based on engineering drawings, including CNC punching, multi-axis bending, tin/nickel/silver plating on connection tabs, and customized insulation layer thicknesses.
The designed lifespan is ≥15–20 years under normal operating conditions. PI film possesses superior aging resistance, provided mechanical scratches and extreme sharp burr punctures are avoided.