New Energy Battery Copper Foil Flexible Connector
Products Description
In new energy systems, the New Energy Battery Copper Foil Flexible Connector is no longer simply a conductive component, but a critical structural unit affecting system safety, lifespan, and energy efficiency.
Copper foil flexible connectors, with their unique flexible structure, effectively solve the stress concentration problems of traditional rigid busbars caused by vibration, thermal expansion, and assembly deviations, making them an irreplaceable core component in current power battery systems and electrical equipment.
For different application scenarios:
Small-sized: Widely used in internal module connections within new energy vehicle battery packs.
Large-size: Suitable for high-current scenarios such as high-voltage power distribution systems, power equipment, and energy storage systems.
Differentiated Technological Features: Micron-Level Precision Engineering Performance
Diffusion Bonding
Unlike traditional brazing or soldering, we employ a diffusion bonding process under vacuum or a protective atmosphere. Under high temperature and pressure, the ends of multiple copper foils achieve molecular-level penetration and fusion, forming a complete copper block without solder residue.
Extremely High Fatigue Life
By precisely controlling the thickness of each copper foil layer (0.03mm - 0.5mm) and the annealing process, the product exhibits excellent fatigue resistance during hundreds of thousands of reciprocating cycles, completely solving the problem of brittle metal fracture for Copper foil flexible bus bar.
Skin Effect Optimized Design
For high-frequency currents in high-power power electronic devices, the multilayer structure effectively reduces AC impedance and minimizes system heat loss.
Application Advantages: Adaptable to Both Miniature and Giant Applications
Based on vastly different physical forms, Flexible Nickeled Copper Bus Bars demonstrate irreplaceable dominance in two core areas.
New Energy Vehicles (Miniaturization, High-Frequency Vibration, Lightweighting): In power battery modules, space is extremely limited. The ultra-thin nature of the Copper Laminated Flexible Shunts allows for close alignment with the battery cells, significantly reducing the Z-axis height. Their nickel or tin plating perfectly complements fully automated laser welding processes, producing full, spatter-free welds free of harmful volatile organic compounds, meeting the extremely stringent environmental and reliability requirements of automotive-grade (IATF 16949).
Power Appliances and Industrial Energy Storage (Giantization, High Current, High Voltage): In large transformers, wind power converters, and large energy storage containers can reach lengths of several meters and widths of half a meter. The challenge here is no longer space, but how to cope with continuous, enormous heat loads and centimeter-level displacements caused by the thermal expansion and contraction of the busbars. The giant flexible connection, like a huge "metal ribbon," can absorb huge thermal displacements without changing the inductance distribution of the main circuit of the system, thus ensuring the long-term stability of the heavily loaded power grid.
Detailed Inspection and Quality Control
End Solder Interface
After diffusion soldering, the end face should exhibit a uniform copper color, with no visible interlayer gaps or solder lines. If obvious solder color or porosity is observed, it indicates that brazing was used instead of diffusion soldering, raising questions about reliability.
Layer Edge Alignment
Lay the Tinned Copper Foil Connector flat and observe the sides of the middle flexible section. Each layer of copper foil should be basically aligned, with misalignment not exceeding twice the copper foil thickness. Obvious interlayer misalignment or wavy twisting indicates a lack of precision control in the lamination process.
Resilience After Bending
Bend the middle section 90° by hand and release. High-quality Press Welding Foil Busbars should exhibit moderate resilience, rather than completely retaining the bent shape or failing to rebound at all. This reflects the purity of the copper foil and the appropriateness of the annealing process.
Insulating sleeve fit
If silicone sleeves are ordered, the sleeves should fit tightly against the copper foil surface, without wrinkles or bubbles, and the ends should be fixed with high-temperature resistant adhesive or clamps to prevent the sleeves from slipping off during vibration.
contact us
To match your Laminated Copper Flexible Connectors' structural design and current carrying capacity, our engineering team can provide customized selection and optimization support. Please submit your technical requirements to obtain a tailored solution.
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