2-Piece 3mm Aluminum Oxide Copper Spot Welding Electrode Tips

Inconsistent weld joints, severe tip sticking, and excessive thermal erosion shouldn't compromise your custom battery pack builds or slow down your spot welding repairs. Achieve clean, high-conductivity, non-stick pulse welds on 18650 lithium-ion battery cells with our 2-piece 3mm aluminum oxide copper spot welding electrode tips, engineered specifically for hand-held welding pens and precision battery building.

Crafted from high-grade alumina copper (CuAl2O3) alloy, these 3mm welding needles deliver exceptional electrical conductivity alongside high-temperature softening resistance. Unlike standard pure copper electrodes that soften, deform, and stick to nickel strip surfaces under heavy current, alumina copper resists annealing up to 1652°F (900°C). This ensures minimal spark splash, zero sticking to nickel tabs, and consistent arc transfer across hundreds of welding cycles. Perfect for DIY battery builders, electronics technicians, and spot welding machines, this 2-piece electrode set ensures strong, professional weld spots every time.

Key Features

• High-Grade Alumina Copper Alloy: Combines superior electrical conductivity with high thermal resistance to prevent tip softening and deformation during continuous pulse welds.

• Non-Stick Welding Performance: Formulated specifically to eliminate electrode-to-nickel strip adhesion, ensuring clean releases without tearing nickel plating.

• Universal 3mm Shaft Compatibility: Fits standard hand-held spot welding pens, automatic battery welding machines, and DIY pulse spot welders.

• High Temperature & Erosion Resistance: Maintains structural tip hardness at temperatures up to 1652°F (900°C), drastically extending electrode lifespan compared to pure red copper.

• Minimal Sparking & Low Contact Resistance: Delivers focused, stable current transfer for deep weld penetration and smooth, uniform weld spots on battery terminals.

• Essential 18650 Battery Pack Tool: Ideal for building, repairing, and re-tubing 18650, 21700, and 26650 lithium-ion battery packs, power tool batteries, and e-bike power systems.

Why Choose Our Alumina Copper Welding Needles Unlike basic copper electrodes that pit, bend, and fuse to nickel sheets after a few dozen fires, our aluminum oxide copper welding tips maintain their tip profile and non-stick properties under intense current pulses. They give you reliable weld integrity and fewer machine downtime pauses for tip dressing.

Perfect For

• DIY battery builders, EV hobbyists, and e-bike technicians assembling custom 18650 and 21700 battery packs.

• Electronics repair technicians and metal fabricators using hand-held spot welding pens.

• Small workshops and manufacturing setups producing lithium battery modules for power tools and solar storage.

Product Specs

• Quantity: 2 Pieces

• Shaft Diameter: 3 mm (0.12 in)

• Material: Aluminum Oxide Copper Alloy (CuAl2O3 / Alumina Copper)

• Softening Temperature: Up to 1652°F (900°C)

• Application: 18650/21700 Lithium Battery Spot Welding, Nickel Strip Welding

Upgrade Your Spot Welding Precision Today Stop fighting stuck electrodes and uneven welds on your battery projects. Order your 2-piece 3mm aluminum oxide copper spot welding electrode tips today and build battery packs with total confidence!