Copper Foil Resistance Diffusion Soldering Flexible Connection
Products Description
Copper Foil Resistance Diffusion Soldering Flexible Connection is a highly reliable conductive component based on multilayer lamination of high-purity copper foil, achieving atomic-level diffusion bonding through resistance heating.
Depending on size and structure:
Small-size copper foil flexible connections: Primarily used in power battery modules for new energy vehicles and internal busbar transition connections within battery packs.
Large-size copper foil flexible connections: Primarily used in power electrical equipment, energy storage systems, transformers, switchgear, and industrial power distribution systems.
The core value of this product lies in providing mechanical flexibility and buffering capabilities while maintaining high current carrying capacity, thereby solving problems related to thermal expansion compensation, vibration stress release, current distribution, and structural space constraints.
Core Technology Principles: Depth of Resistance Diffusion Welding
Microscopic Mechanism of Solid-State Bonding
Unlike traditional fusion welding or soldering, resistance diffusion welding is a solid-state bonding technology. During the welding process, under the combined effects of resistance heat and pressure, the microscopic protrusions on the contact surface of the Flexible Copper Shunts stack undergo plastic deformation, the oxide film ruptures, and the pure metal surfaces adhere tightly. As the temperature rises below the recrystallization temperature of copper (to avoid melting), atoms diffuse across the interface, ultimately achieving a macroscopically integrated metallurgical bond.
Minimization of Interface Resistance
In the diffusion welding process, due to the absence of a solder interlayer, the bonding area retains the conductivity of the base material (high-purity copper). By precisely controlling the welding thermal parameters and pressure curve, we eliminate voids and defects at the interface, resulting in near-zero contact resistance at the joint. This is crucial for high-current applications, effectively avoiding energy loss and safety hazards caused by joint heating.
Material Selection Art: The Commitment to High-Purity Electrolytic Copper
Raw Materials
T2/C11000 high-purity electrolytic copper with a purity of≥99.95% is selected.
Ultra-thin Foil
Copper foil with a thickness of 0.03mm to 0.5mm is conventionally used. Ultra-thin foil means more layers within the same cross-sectional area, resulting in better bending life and flexibility.
Insulation Solution
Combined with high-strength heat-shrink tubing, PVC coating, or high-performance silicone rubber, Copper Laminated Flexible Connectors provides insulation and withstand voltage protection up to 1500V DC.
Detailed Showcase: The Embodiment of Craftsmanship
Edge Processing
The Copper Foil Multi-Layer Welding Busbar edges undergo special deburring and chamfering treatment, ensuring both aesthetics and effective prevention of scratches to the insulation layer or operators during installation, reflecting an extreme pursuit of safety details.
Surface Finish
The copper foil surface is bright and clean, free of oxidation and oil stains. For customers with special requirements, we offer localized silver or tin plating, resulting in a uniform, dense plating layer with strong adhesion that will not peel off even under frequent thermal cycling.
Joint Transition Zone Optimization
In the transition area between the Copper Flexible BusBars for Lithium Battery and the rigid joint, we achieve a smooth transition through special mold design and process parameters, eliminating stress concentration points and preventing the product from breaking at this point during repeated bending.
contact us
If you are evaluating highly reliable flexible connection solutions for new energy battery systems or power equipment, our engineering team can provide customized optimization suggestions based on your current rating and structural drawings. You are welcome to submit your technical parameters to the inquiry page for technical consultation on Copper Foil Flexible Storage Energy Battery Busbar.
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