Flexible Copper Foil Multi Layer Thin Sheet
Products Description
Flexible Copper Foil Multi Layer Thin Sheets are created by bonding multiple layers of ultra-thin copper foil with insulating or conductive media using a specialized process, resulting in a thin, flexible connector with excellent bending capabilities. Small-format products are exceptionally thin and flexible, making them ideal for short-distance connections between battery cells or modules. Large-format products, on the other hand, feature increased layer counts and widths to enhance current-carrying capacity, meeting the requirements for flexible busbars in high-voltage electrical equipment.
Key Product Features:
Exceptional Flexibility: The multi-layer foil structure allows for easy bending and twisting, accommodating complex installation paths and dynamic operating environments.
High-Efficiency Conductivity: A multi-layer parallel design increases the effective conductive cross-sectional area and reduces overall resistance, ensuring stable current transmission.
Thin and Lightweight Profile: Even when stacked, the ultra-thin foil layers maintain a low profile and minimal weight, supporting lightweight design goals in new energy vehicles.
Thermal Stress Buffering: The flexible structure effectively absorbs differential thermal expansion during battery pack charging and discharging, preventing stress concentration at connection points.
In-depth Analysis of Technical Features: A Perfect Fusion of Electrical and Mechanical Performance
Dynamic Thermal Stability
Under the impact of short-circuit currents, conductors experience immense repulsive forces. Our Laminated Flexible Busbar for New Energy Vehicles structure effectively dissipates electromagnetic forces; combined with robust terminal welding, this ensures structural integrity-preventing rupture or fusing-even when subjected to short-circuit currents in the tens of kiloamperes.
Weldability and Connectivity
Designed for automated production lines in the new energy vehicle battery sector, the terminals of our compact Copper Foil Busbar Used for High Current Voltages undergo special treatment to enable direct laser welding. This, combined with automated ultrasonic welding processes, facilitates highly efficient connections between battery cells and busbars.
Insulation Encapsulation Compatibility
The Flexible Copper Foil Busbar with Laminated Copper Shunt design incorporates specific interfaces for insulation application. Whether utilizing heat-shrink tubing, dip coating, or injection molding, the chamfered edges of the copper foil prevent the insulation layer from being punctured, thereby meeting the stringent high-voltage insulation requirements of electrical equipment.
Detail Showcase: Quality Indicators from an Engineering Perspective
Alignment of Copper Foil Laminations
In high-quality Copper Foil Bus, the edges of the copper foil layers in the flexible zone are neatly aligned and flat, free from misalignment, creases, or wavy deformations. Uneven lamination can lead to uneven current distribution and localized overheating.
01
Density of the Welded Zone
The cross-section of the molecular diffusion-welded zone should exhibit a uniform copper color, free from porosity, slag inclusions, or cracks. This can be verified through cross-sectional metallographic inspection.
02
Transition Between Flexible and Rigid Zones
The transition should be smooth and seamless, without sharp edges or imperfections. Designs that create stress concentrations at the transition point pose a risk of fatigue fracture.
03
Uniformity of Surface Treatment
The plating layer should be uniform and continuous, with no peeling or exposed copper. The finish of the contact surfaces must meet specified requirements.
04
Bending Performance
The component should show no cracks or delamination during a 90° bending test. The flexible zone must be capable of withstanding the specified number of repeated bending cycles without fracturing.
05
Key Application Scenarios
New Energy Vehicles (EV/HEV)
Power battery module busbars, main circuit connections for battery packs, and internal jumpers for motor control units (MCUs).
Energy Storage Systems (ESS)
Interconnections between battery clusters in containerized energy storage units and high-voltage connections for PCS inverters.
Power Transmission, Distribution, and Electrical Equipment
Large transformer lead-outs, high- and low-voltage switchgear, and high-current equipment such as electrolytic cells and industrial electric furnaces.
Rail Transit
Flexible connections for traction converters, locomotive main transformers, and high-voltage electrical cabinets.
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The Flexible Copper Foil Bus bar for EV Battery Packs is an advanced interconnect solution designed for new energy applications and high-reliability electrical systems. By utilizing a multi-layer copper foil structure, highly conductive materials, and precision manufacturing processes, it achieves an optimal balance of flexibility, current transmission, and mechanical compensation.
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