Pure Nickel 2P Strip – Reliable, Low-Resistance Connections for 18650 Battery Packs
Have you ever built a battery pack, only to find the strips oxidising or the temperature spiking under load a few months later? The culprit is almost always nickel-plated steel. This 2P pure nickel strip eliminates that risk entirely, offering superior electrical conductivity and long-term stability for your high-performance builds.
Note: This is genuine pure nickel, not nickel-plated steel. You can easily verify this with a magnet—pure nickel is non-magnetic—or by using a drop of hydrochloric acid (HCl).
Why choose this pure nickel strip? (Key Advantages):
- Pure Nickel, Not Plated — Up to 6x lower electrical resistivity compared to nickel-plated steel, resulting in significantly less heat generation and fewer energy losses in your pack.
- Superior Oxidation Resistance — Connections remain stable for years, even in high-humidity environments, ensuring your pack stays reliable.
- 20.2mm 2P Spacing — Perfectly aligned for standard 18650 battery holders and 3D-printed spacers, requiring no manual adjustments.
- Clean Spot Welding at 60-70 J — Bonds firmly to Li-Ion terminals, creating flat, secure welds that won’t vibrate loose over time.
- 5-Metre Roll — Ample length for a 13S4P e-bike battery or multiple smaller DIY projects.
- Versatile Applications — Ideal for off-grid solar systems, UPS units, power tools, and high-capacity power banks.
Performance and Specifications
Unlike nickel-plated steel, which relies on a thin surface coating that can degrade, pure nickel provides consistent conductivity throughout the entire 0.15mm thickness. The 2P format with a 27mm width covers two poles of parallel-aligned 18650 cells simultaneously, effectively halving your welding time. The result is a faster assembly, fewer contact points, and a cleaner, more compact battery pack.
| Parameter | Value / Detail |
|---|---|
| Material | Pure Nickel (not nickel-plated steel) |
| Thickness | 0.15 mm |
| Width | 27 mm |
| Roll Length | 5 metres |
| Configuration | 2P – 20.2 mm cell spacing |
| Cell Compatibility | Li-Ion 18650 (and other formats with compatible spacing) |
| Assembly Method | Spot welding |
| Recommended Welding Energy | Minimum 60-70 J |
| Corrosion Resistance | High – pure nickel does not oxidise easily |
| Main Applications | DIY batteries, power tools, solar systems, UPS, e-bikes |
Usage Instructions
- Measure and cut the strip to the required length for your 2P configuration.
- Align the strip over the 18650 cell terminals, ensuring the edges are centred.
- Secure the strip temporarily to prevent movement during the welding process.
- Perform spot welding using a machine set to at least 60-70 J. Note that pure nickel may require slightly higher energy settings than nickel-plated steel to achieve a strong bond.
- Visually inspect each weld; a good weld should be smooth, flat, and firmly anchored to the terminal.
- Test electrical continuity with a multimeter before sealing your pack.
Package Contents
- 1 x Roll of 2P Pure Nickel Strip – 5 metres long, 27 mm wide, 0.15 mm thick
Frequently Asked Questions
What is the real difference between pure nickel and nickel-plated steel?
Pure nickel has significantly better electrical conductivity. Lower resistivity means less heat and fewer power losses within your pack. While plated steel is cheaper, the nickel coating can wear down, exposing the steel to rust. Pure nickel is the professional choice for long-term reliability.
How can I verify that this is pure nickel?
There are two simple tests: use a magnet or a drop of diluted HCl. Pure nickel is non-magnetic and will not react with the acid. Steel, however, is magnetic and will show signs of effervescence or rust when exposed to acid.
Which spot welder should I use?
Any battery-dedicated spot welder capable of at least 60-70 J will work. Adjust your settings based on your machine’s manual; pure nickel often requires slightly more energy than plated steel to ensure a high-quality weld.
Can I use this for cells other than 18650?
Yes. It is compatible with 21700 cells and other cylindrical formats, provided the 27mm width and 20.2mm spacing align with your build. For non-standard configurations, the strip can be easily cut and adapted.
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