21700 2P Pure Nickel Strip - 0.20mm Thick

Pre-cut pure nickel strip designed for building straight 21700 2P parallel cell groups.

Each strip is sized for two 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 6S2P, 10S2P, 12S2P, custom, repair, or test builds.

Key Features

• Designed for straight 21700 2P 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 modular EV battery packs
• Sold by individual piece

Quantity

Quantity 1 = one pre-cut 21700 2P pure nickel strip.

Examples:

• Quantity 12 = enough for one 6S2P pack
• Quantity 20 = enough for one 10S2P pack
• Quantity 24 = enough for one 12S2P pack
• Quantity 30 = enough for one 12S2P pack with six spare strips

Order extra pieces for test welds, spot-welder setup, misalignment, damaged material, repairs, or future maintenance.

How Many Pieces Do I Need?

Each nickel strip is designed for one side of a straight 21700 2P parallel group.

Each 21700 2P parallel group typically uses:

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

Typical quantities:

• 6S2P battery pack: 12 strips
• 10S2P battery pack: 20 strips
• 12S2P battery pack: 24 strips

Suggested quantities with spares:

• 6S2P build: 14–16 strips
• 10S2P build: 22–24 strips
• 12S2P build: 26–30 strips

These quantities cover the pre-cut 2P parallel-group strips. Your complete battery design may require additional nickel, copper, wire, or other conductive material for series connections and main current paths.

Common Applications

These strips are commonly used for:

• 6S2P battery packs
• 10S2P battery packs
• 12S2P battery packs
• Modular 21700 battery builds
• Electric skateboard batteries
• Compact electric-vehicle battery packs
• Repairing or rebuilding damaged parallel groups
• Spot-welding practice and testing

Specifications

• Cell size: 21700
• Parallel-group format: Straight 2P
• 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 two-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 “2P.” Different holders, spacing, and battery layouts may require different strip dimensions.

Parallel and Series Connections

Each strip is designed to connect one side of a 2P 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 conductor system depends on the battery architecture and current requirements.

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 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 = 1× pre-cut 21700 2P pure nickel strip.

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