Multi-Layer Copper Busbar Foil Flexible Connection
The multi-layer copper busbar foil flexible connection is a flexible conductive component formed by laminating and bonding multiple layers of high-conductivity copper foil using specialized manufacturing processes. It is widely used to provide conductive connections and stress-buffering capabilities between new energy battery systems and high-current electrical equipment. By integrating a multi-layer copper foil structure, highly reliable welding techniques, and a flexible mechanical design, the product achieves a balance between efficient current conduction and mechanical flexibility; it ensures low resistance and high conductivity while effectively absorbing structural stresses caused by vibration, displacement, and thermal expansion or contraction, making it an indispensable component in modern, high-end electrical connection systems.
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Product Introduction
Multi-Layer Copper Busbar Foil Flexible Connections serve not merely as conductive connectors but as "flexible power transmission structures" within electrical systems. Their core functions include:
Ensuring stable high-current transmission paths: maintaining low impedance and minimal temperature rise under high-current loads.
Absorbing mechanical vibration and displacement stress: preventing fatigue fractures caused by rigid connections.
Compensating for thermal expansion and structural misalignment: accommodating thermal cycling during system operation.
Optimizing electrical connection stability: reducing the risk of contact resistance fluctuations.
Enhancing system safety: minimizing connection failures caused by rigid stress.
Improving assembly flexibility: adapting to complex spatial layouts and asymmetrical structural designs.
As new energy and power systems evolve toward higher power densities, these flexible copper connectors have become a critical component in the safety design of battery systems.
Detailed Views
Layered Structure Close-up
Features neatly aligned edges across multiple copper foil layers and tight interlaminar bonding; the flexible section reveals natural layering and clearance for movement, showcasing precision composite manufacturing.
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Flexibility Demonstration
The Custom Flexible Copper Foil Laminated Busbars easily withstands multi-directional, wide-angle bending; it retains its shape upon release with no significant permanent deformation.
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Terminal Processing Details
Holes are smooth and burr-free with high flatness; plating is uniform and lustrous, and the transition zone to the crimp area is smooth and seamless.
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Insulation Details
Heat-shrink tubing is evenly shrunk with secure adhesion, or the silicone coating is of consistent thickness, ensuring optimal electrical isolation.
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Packaging and Labeling
Utilizes specialized moisture-proof and crush-resistant packaging; each unit is individually protected and clearly labeled with specifications to facilitate warehousing and on-site identification.
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Application Advantages: A Versatile, Dual-Purpose Solution Spanning New Energy and Traditional Heavy Electrical Sectors
New Energy Vehicles and Energy Storage Packs
Laminated Connector for Electrical Equipment Used for series and parallel main circuit bridging between cell modules (Cell-to-Module) in EV battery packs for passenger and commercial vehicles, as well as for flexible connections within high-voltage Power Distribution Units (PDUs).
High-Power Transformers
Facilitates flexible, directional connections between transformer low-voltage terminals and busways, effectively absorbing low-frequency electromagnetic hum generated during transformer operation.
Heavy Industrial Equipment
Laminated Copper Busbar for Inverter Employed in heavy-duty power supply circuits requiring ultra-high DC currents-such as those for aluminum electrolysis, electroplating equipment, large-scale resistance welding machines, and smelting furnaces-where operations involve exposure to intense heat.
Material Advantages: Micro-level Purity and Macro-level Performance of the Foil
| High-conductivity matrix of T2 copper foil | T2 copper (Cu ≥ 99.9%) features an electrical conductivity of ≥100% IACS. It offers moderate strength in the cold-rolled state and an elongation of ≥30% after annealing, meeting the requirements for plastic deformation during diffusion welding and fatigue resistance during flexible bending. |
| Hydrogen embrittlement immunity of oxygen-free copper (C10200) | For vacuum diffusion welding or high-temperature service environments, oxygen-free copper is selected to eliminate the risk of hydrogen embrittlement, ensuring that no micro-cracks initiate at the welding interface or in the bending zones. |
| Diffusion barrier provided by the nickel plating layer | Acting as a diffusion barrier between the copper substrate and the external environment, the nickel layer prevents copper atoms from migrating to the surface and oxidizing at high temperatures (>100°C). Copper Flexible Bus Bars Bending also provides a compatible contact surface for stainless steel bolts, preventing galvanic corrosion between the copper and steel. |
| Chemical resistance of polyimide insulation | The PI film remains chemically inert in environments involving electrolytes, coolants, and salt spray. With a dielectric strength of ≥150 kV/mm, it is the preferred choice for insulation wrapping within new energy battery packs. |
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As a high-end electrical connection solution, the Custom Flexible Copper Foil Laminated Busbars serve not only to conduct electricity but also act as a critical structural component-delivering safety, flexibility, and high efficiency-within new energy systems and power equipment. Its performance directly impacts the system's energy efficiency, stability, and long-term operational reliability.
Amid the trend toward increasing integration in new energy battery systems and high-voltage power equipment, this product has become an indispensable fundamental connection unit in engineering design.
If you are currently engaged in the structural design or component selection for new energy vehicle battery systems, energy storage systems, or high-current power equipment, we can provide customized flexible copper connection solutions based on your engineering drawings and application requirements, supporting project implementation with a core focus on engineering reliability and system compatibility.
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