Insulated Heat-Shrinkable Copper Bars
In high-load applications—such as modern industrial power distribution, rail transit, and high-density computing centers—our insulated heat-shrinkable copper bars overcome the spatial constraints and risks of electrical breakdown associated with traditional bare copper busbars and overlapping insulation methods. They offer an ideal alternative, delivering comprehensive value to customers ranging from enhanced equipment performance to reduced lifecycle costs.
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Product Introduction
What are Insulated Heat-Shrinkable Copper Bars?
Insulated heat-shrinkable copper bars are a new type of power transmission component created by thermally bonding high-purity conductive copper busbars with specialized heat-shrinkable polymer materials. Engineered to withstand harsh operating conditions-such as high humidity, heavy salt spray, confined spaces, and frequent thermal cycling-they effectively prevent phase-to-phase short circuits, bridging by foreign objects, and flashover incidents, serving as a critical foundation for ensuring long-term, reliable operation in power engineering and high-end equipment manufacturing.
Key Features of Heat Shrink Tubing Busbar
High-density encapsulation and seamless fit
For EV battery connectors, controlled heat-pressing ensures the insulation layer conforms tightly to the busbar's irregular surfaces-free of bubbles or gaps-thereby eliminating the risk of partial discharge caused by dielectric voids.
Anisotropic shrinkage control
The busbar heat-shrink sleeves feature high radial shrinkage and minimal axial shrinkage, ensuring uniform insulation wall thickness and reliable performance even at complex bends and stepped structures.
Superior Space Efficiency
Utilizing this solid insulation tubing allows for a reduction in phase spacing of over 50% compared to traditional air insulation, enabling compact designs for high-voltage switchgear and transformer enclosures.
Self-Extinguishing Weather Resistance
The halogen-free flame-retardant system offers self-extinguishing properties, UV resistance, and chemical corrosion resistance, effectively withstanding exposure to coastal environments and harsh acidic or alkaline gases found in chemical processing facilities.
Manufacturing Process Workflow for Battery Terminal Busbars
Copper Precision Processing and Stress Relief: High-purity copper strips undergo precision cutting and leveling, followed by stress-relief annealing to ensure no internal cracking occurs during subsequent bending.
Edge Radiusing: For busbars designed with heat-shrinkable busbar insulating tape, automated chamfering machines grind and round all edges, effectively removing burrs and eliminating potential points for corona discharge.
Surface Chemical Treatment and Plating: Before insulating, the busbar with black heat-shrink tube undergoes pickling and degreasing, followed by precision electroplating (tin or silver) on the contact terminals to enhance corrosion resistance and electrical conductivity.
Selective Masking and Heat-Shrink Tubing Application: High-precision fixtures mask the contact areas, while polymer heat-shrink tubing is applied to designated insulation sections.
Controlled Radiant Heat Shrinking and Forming: When applying PVC heat-shrink insulation sleeves to copper busbars, use a constant-temperature hot-air tunnel or circulating heat-shrink oven to ensure continuous, uniform heating so the tubing shrinks tightly onto the busbar surface.
Final Inspection and Packaging: Following electrical withstand voltage testing, 3D coordinate dimensional measurement, and visual inspection of the PVC heat-shrinkable sleeves for busbar, the product is sealed in moisture-proof vacuum packaging.
Main Application Scenarios For EV Battery Connector
High-end High/Low-voltage Switchgear
The busbar with PVC insulation is designed for connecting main and branch busbars in compact power distribution cabinets, such as KYN28 and MNS models.
Data Centers
PVC busbar heat shrink sleeves deliver reliable insulation to ensure stable power distribution for busway systems and power distribution units (PDUs) in high-power-density server racks.
New Energy Power Generation and Energy Storage Systems
Main power lines connecting photovoltaic inverters, wind power converters, and containerized energy storage battery clusters.
Rail Transit and Heavy Equipment
Serves high-power connections for locomotive traction converters, urban rail transit substations, and large-scale mining drive equipment with a copper busbar PVC-insulated design.
Frequently Asked Questions About PVC Heat Shrinkable Sleeves For Busbar
What are the key advantages compared to tape or plastic barriers?
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Prefabricated heat-shrinkable busbar insulation offers high dielectric strength and fits tightly against copper bars without air gaps, eliminating the risk of partial discharge. It reduces phase spacing by over 50%, eliminates the need for on-site wrapping, boosts installation efficiency by 70%, and remains durable without aging or peeling throughout its lifecycle.
How is insulation performance maintained when the insulation layer thins at bends?
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We utilize heat-shrink tubing with high anisotropic shrinkage rates combined with precision thermal stress control processes. Whether applied before or after bending, the insulation wall thickness at the outer radius of the bend is rigorously calculated and verified to fully comply with power-frequency withstand voltage and lightning impulse test standards.
Is complex 3D customization based on electrical drawings (STEP/DWG) supported?
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Yes, fully supported. Our professional team seamlessly integrates with 2D and 3D CAD files (such as STEP and DWG) to provide one-stop engineering customization services, ranging from Design for Manufacturability (DFM) assessment and rapid prototyping to mass production with seamless bending.
Which international certifications and electrical tests do the products meet?
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Both materials and finished products comply with UL94 V-0 flame retardancy, IEC 60694 power-frequency withstand voltage, RoHS/REACH environmental standards, and high/low-temperature thermal cycling aging tests, easily meeting market entry requirements for Europe, the Americas, the Middle East, and other global regions.
Contact Us
Leveraging a comprehensive suite of CNC automated bending and controlled heat-shrink molding processes, we deliver customized, cost-effective heat-shrink tube copper insulated busbar solutions that enhance electrical conductivity, optimize phase-to-phase clearance, and reduce lifecycle O&M costs. We invite you to submit your engineering drawings and technical specifications to our expert team for a detailed assessment and quotation.
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