21700 3P Pure Nickel Strip - 0.20mm Thick

Pre-cut pure nickel strip designed for building straight 21700 3P parallel cell groups.

Each strip is sized for three 21700 cells arranged side by side and provides a clean, repeatable conductor for spot-welding parallel connections. The pre-cut format helps reduce measuring, trimming, and material waste during battery-pack assembly.

Sold individually so builders can order the exact quantity needed for a 10S, 12S, custom, repair, or test build.

Key Features

• Designed for straight 21700 3P cell groups
• Made from pure nickel
• 0.20mm thickness
• Pre-cut for repeatable battery-pack assembly
• Suitable for spot welding
• Helps simplify parallel-group construction
• Useful for electric skateboard and DIY EV battery packs
• Sold by individual piece

Quantity

Quantity 1 = one pre-cut 21700 3P pure nickel strip

Examples:

• Quantity 10 = 10 strips
• Quantity 12 = 12 strips
• Quantity 15 = 15 strips
• Quantity 24 = 24 strips

Order extra pieces for test welds, setup adjustments, mistakes, repairs, or future maintenance.

Common Applications

These strips are commonly used for:

• 10S3P battery packs
• 12S3P battery packs
• Modular 21700 battery builds
• Electric skateboard batteries
• Drift-cart and lightweight EV battery packs
• Repairing or rebuilding damaged parallel groups
• Spot-welding practice and testing

Specifications

• Cell size: 21700
• Parallel-group format: Straight 3P
• Material: Pure nickel
• Thickness: 0.20mm
• Format: Pre-cut strip
• Application: Parallel cell-group connections
• Quantity: Sold individually

Important Fitment Note

This strip is intended for a straight three-cell 21700 layout.

Before ordering, confirm:

• Cell diameter
• Cell spacing
• Strip dimensions
• Terminal alignment
• Pack layout
• Spot-welder capability
• Required current capacity

Do not assume compatibility based only on the term “3P.” Different holders, spacing, and battery layouts may require different strip dimensions.

Parallel and Series Connections

Each strip is designed to connect one 3P parallel group.

A complete battery pack may require additional conductive material for:

• Series connections
• Main positive and negative terminals
• BMS wiring
• Balance leads
• Fuse connections
• Custom current paths

The exact amount of nickel required depends on the battery architecture and current demands.

Installation

Before spot welding:

1. Confirm all cells are matched and within an appropriate voltage range.
2. Inspect cell wrappers and terminal insulators.
3. Clean the nickel and cell terminals.
4. Align the strip over the correct terminals.
5. Verify polarity and pack layout.
6. Test weld settings on scrap material or a test cell setup.
7. Make consistent welds without overheating the cells.
8. Inspect every weld before continuing assembly.

Do not solder directly to lithium-ion cell terminals unless using a process specifically designed and validated for that application.

Why Pure Nickel?

Pure nickel offers better corrosion resistance and more predictable electrical performance than nickel-plated steel.

It is commonly preferred for lithium-ion battery-pack construction because it:

• Spot welds reliably when properly configured
• Resists corrosion
• Provides consistent conductivity
• Avoids the hidden steel core found in nickel-plated material

Always verify material authenticity through supplier documentation or appropriate testing.

Safety Information

Lithium-ion battery construction can cause fire, serious injury, or property damage if completed incorrectly.

Battery packs should only be assembled by someone familiar with:

• Cell matching
• Polarity
• Spot welding
• Insulation
• Current-path design
• BMS wiring
• Short-circuit prevention
• Electrical testing

Pure nickel strip does not replace proper pack design, fusing, insulation, structural support, or current-capacity calculations.

What’s Included

• Quantity 1 = 1x pre-cut 21700 3P pure nickel strip.

Examples:

• Quantity 12 = enough for the parallel groups in one 6S3P pack
• Quantity 20 = enough for one 10S3P pack
• Quantity 24 = enough for one 12S3P pack
• Quantity 27 = enough for one 12S3P pack with three spare strips

Cells, fish paper, terminal insulators, series conductors, wiring, BMS components, and tools are not included.

How Many Pieces Do I Need?

Each nickel strip is designed for one straight 21700 3P parallel group.

Each 21700 3P parallel group typically uses:

• 1 strip on the positive side
• 1 strip on the negative side
• 2 strips total per parallel group

Typical quantities:

• 6S3P battery pack: 12 strips
• 10S3P battery pack: 20 strips
• 12S3P battery pack: 24 strips

Consider ordering extra strips for:

• Test welds
• Spot-welder setup
• Misaligned or unsuccessful welds
• Damaged material
• Repairs
• Future maintenance

These quantities cover the pre-cut nickel strips used for the 3P parallel groups. Your complete battery design may require additional nickel, copper, wire, or other conductive material for series connections and main current paths.