3MM Copper Spot Welding Electrode Needles – 18650 Battery Pack
3MM Copper Spot Welding Electrode Needles – 18650 Battery Pack
Precision Copper Spot Welding Electrode Needles
Upgrade your battery spot welding setup with these high-quality 3MM Purple Copper Oxide Electrode Needles, designed specifically for 18650 power battery double-head spot welders. Crafted from premium copper for excellent electrical conductivity and durability, these electrodes deliver consistent, reliable welds every time.
Key Features
- Material: High-quality copper with copper oxide finish for superior conductivity
- Size: 3 × 50 mm — a versatile fit for most standard spot welder pens and holders
- Double-head design: Both ends usable, maximizing the lifespan of each electrode
- Compatible with: 18650 lithium battery packs and similar cell formats
- Pack options: Available in 2, 5, or 10 pieces — stock up and save
- Consistent performance: Ensures clean, precise weld points on battery tabs and nickel strips
Specifications
| Material | Copper (Purple Copper Oxide) |
| Diameter | 3 mm |
| Length | 50 mm |
| Head Type | Double Head |
| Compatible Battery Type | 18650 & similar lithium cells |
| Quantity | 2 / 5 / 10 Pieces per pack |
| Country of Origin | Made in Mainland China |
What's in the Box
- 2, 5, or 10 × Copper Oxide Spot Welding Electrode Needles (3 × 50 mm)
Please note: Manual measurements may vary by 2–3%. Actual product color may differ slightly from images due to monitor display settings.
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Frequently Asked Questions
Q: What type of spot welder are these copper electrode needles compatible with?
A: These 3 × 50 mm copper oxide electrode needles are designed for use with standard 18650 battery spot welder pens and holders. They fit most handheld and benchtop spot welding machines that accept 3 mm diameter electrodes, making them ideal for DIY battery pack assembly and repair.
Q: Why choose copper oxide (purple copper) electrodes over standard electrodes?
A: Purple copper oxide electrodes offer superior electrical conductivity compared to many alloy alternatives. This means more efficient energy transfer during each weld, resulting in cleaner, more consistent weld points on nickel strips and battery tabs — essential for building reliable 18650 battery packs.
Q: How long do these spot welding electrode needles last?
A: Longevity depends on welding frequency and power settings. The double-head design effectively doubles usable life — simply flip the electrode when one end wears down. Stocking a multi-pack (5 or 10 pieces) ensures you always have fresh electrodes on hand for uninterrupted projects.