Film Capacitor Copper Busbar For Electric Vehicles
Products Description
The Film Capacitor Copper Busbar for Electric Vehicles is a laminated conductor structure made of highly conductive copper and surface-insulated with PET insulating paper.
It is commonly used to connect:
Film capacitors with IGBT modules
Film capacitors with SiC power modules
Capacitors with inverter systems
Capacitors with DC-Link systems
Capacitors with high-voltage power distribution modules
Capacitor units in energy storage PCS systems
By optimizing the current path design, electromagnetic interference can be effectively reduced, system operating efficiency improved, and safety and reliability enhanced under high-voltage environments.
Manufacturing Process: Impeccable Powertrain-Level Manufacturing Closed Loop
Precision Sheet Metal Blanking and Micro-machining of Round Corners: The sides of the Copper Busbar for DC link EV Film Capacitors undergo fine passivation and micro-beveling to thoroughly remove tiny burrs, preventing electrical breakdown caused by burrs piercing the PET paper at the source.
Ultrasonic Degreasing and High-Energy Surface Activation: Multiple processes clean residual oil from the copper surface, increasing the surface tensile strength and laying a chemical-grade foundation for perfect adhesion of the PET insulation paper.
Precise Alignment and Lamination in a Class 10,000 Cleanroom: Multiple layers of conductors and insulation films are precisely aligned and laid in a controlled cleanroom, strictly preventing the inclusion of metal particles.
Multi-Stage Pressure Lamination and Heat Sealing: A core process that achieves dense integration at the material level through precise control of pressure balance and temperature curves.
Terminal Forming and Secondary Finishing: Three-dimensional CNC bending of the leads ensures absolute geometrical consistency in three-dimensional space.
100% factory performance inspection: including insulation withstand voltage test (Hi-Pot Test), AC/DC impedance test, and full inspection of three-dimensional projection geometry.
Detailed Demonstration: Witnessing the Obsession with Insulation in the Microscopic Minutes
Seamless Corner Coverage in the R-zone
In the right-angle bend R-zone of the Copper Busbar for Electric Vehicle Capacitors, where electric field distortion is most likely to occur, the PET insulating paper achieves a perfect, bubble-free, and wrinkle-free fit and extended coverage, with uniform thickness, completely encasing the electric field concentration point under the dielectric barrier.
Edge Overhang and Overlap
The PET paper does not just cover the copper surface, but precisely extends to create sufficient insulating overhang edges (anti-creep edges), forming double or even triple overlaps during interlayer lamination, eliminating any possibility of surface discharge.
Transparency and Purity of the Adhesive Layer
Through the transparent PET film, the pure adhesive layer, free of impurities and micro-bubbles, is visible, showcasing the ultimate composite process. This is also microscopic evidence of the extremely high partial discharge initiation voltage.
Insulation clearance in the end welding area
In areas where ultrasonic welding with external terminals is required, the PET insulation paper is precisely cut and chamfered, which does not interfere with the welding quality and forms a smooth insulation transition outside the heat-affected zone of the weld, preventing the insulation layer from being damaged by welding heat.
Application Advantages: Modular assembly significantly increases the first-pass yield of the entire unit
Significantly simplifies the inverter enclosure layout: A single precision Copper Busbar for Hybrid Electric Vehicles Film Capacitor can replace the crisscrossing, heavy cables and single-layer rigid busbars.
"Plug-and-play" compatibility with automated production lines: Excellent positional tolerances allow the Film Capacitor Copper Busbar for Electric Vehicles to be perfectly integrated into the gripping process of fully automated robotic arms, enabling rapid hole-to-hole soldering with thin-film capacitor leads and SiC power modules, significantly reducing the overall manufacturing time.
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Whether you are developing new energy vehicle inverters, DC-Link capacitor modules, or high-voltage energy storage systems, our engineering team can provide a one-stop automotive battery terminal bus bar solution, from structural design and sample development to mass production, based on your electrical parameters, installation space, and manufacturing requirements.
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