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Nickel-plated copper tab (Ni-Cu)

Type: The technology of composite coating with copper and nickel
Features: Nickel-plated copper tabs are primarily used as negative electrode leads in lithium-ion batteries. They combine the high conductivity of copper with the oxidation resistance and easy soldering properties of nickel, and are mainly used in electric vehicle batteries and high-rate discharge applications. They effectively reduce battery internal resistance and improve high-current charge/discharge efficiency.
Description
Parameter categoryTypical specifications/requirementsExplanation
Material (Metal Strip)Positive electrode: Aluminum (Al)
Negative electrode: Nickel (Ni) or nickel-copper (Ni-Cu)
The aluminum tabs are used for the positive electrode, while nickel or nickel-plated copper is used for the negative electrode. This is because aluminum has an incompatible electrical potential with the graphite of the negative electrode.
Safe current-carrying capacityAluminum tab: 3-5 A/mm²
Nickel tab: 11-13 A/mm²
Copper tab: 5-8 A/mm²
This is a crucial design parameter that determines the maximum current that a specific thickness and width of the tab can safely handle.
Film materialWhite glue, black glue, yellow glue, etc.It is usually a multi-layer composite material such as PP/PE. During battery packaging, it is sealed with an aluminum plastic film through heating and thermal fusion to prevent leakage of liquid.
Key performancePeel strength > 15 N/15mm
Resistant to electrolyte corrosion
Ensure that the film is firmly bonded to the metal strip, and that it does not leak or fall off after being immersed in the electrolyte solution, guaranteeing long-term sealing performance.


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