T2 Pure Copper Strip for 18650 21700 Battery Spot Welding | 5m–10m
T2 Pure Copper Strip for 18650 21700 Battery Spot Welding | 5m–10m
T2 Pure Copper & Nickel-Plated Copper Strip — 5m / 10m Rolls
Build reliable, high-performance lithium-ion battery packs with this precision-engineered copper welding strip. Available in both high-purity T2 pure copper and nickel-plated copper variants, this strip is designed for spot welding 18650, 21700, and 26650 lithium-ion cells into packs for electric vehicles, power banks, laptops, and more. CE and RoHS certified for peace of mind. Made in Mainland China.
Key Features
- High-Purity T2 Copper Core: Thickened red copper construction delivers outstanding current-carrying capacity, making it ideal for high-current battery applications.
- Diffusion Nickel-Plating Process: The nickel-plated variant features a highly uniform, strongly bonded coating with low internal resistance. Resistant to peeling and oxidation for long-lasting safety and reliability.
- Precision Machined Edges: Minimal burrs and flash ensure the battery membrane is never punctured during assembly, significantly enhancing safety.
- Degreased Surface Treatment: Each strip undergoes a thorough degreasing process for optimal weld adhesion and cleaner connections.
- Excellent Conductivity & Workability: Bright, smooth surface with superior thermal and electrical conductivity, ductility, corrosion resistance, and weather resistance.
- CE & RoHS Certified: Meets key safety and environmental compliance standards.
Specifications
| Material Options | T2 Pure Copper / Nickel-Plated Copper |
| Dimensions | 0.15 × 10 mm or 0.2 × 10 mm |
| Length Options | 5 metres (unrolled) / 10 metres (unrolled) |
| Compatible Cells | 18650, 21700, 26650 Lithium-Ion |
| Certifications | CE, RoHS |
| Origin | Made in Mainland China |
Applications
This versatile copper strip is widely used across the battery industry, including:
- Electric vehicle (EV) battery packs
- Power bank and portable battery assemblies
- Laptop and mobile phone battery packs
- Self-balancing scooter battery systems
- Nickel-metal hydride (NiMH) and nickel-cadmium (NiCd) battery packs
- Power tool and industrial battery assemblies
- Button cell and custom power battery configurations
What's in the Box
- 1 × Copper Strip Roll (your chosen length and variant)
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Frequently Asked Questions
Q: What is the difference between the T2 pure copper strip and the nickel-plated copper strip?
A: The T2 pure copper strip is made from high-purity red copper, offering maximum electrical conductivity and current-carrying capacity — ideal for high-drain battery builds. The nickel-plated copper strip features a diffusion nickel coating over the copper core, which adds corrosion resistance, improved oxidation resistance, and greater long-term durability, making it a popular choice for battery packs exposed to varied environmental conditions.
Q: Is this strip compatible with 18650, 21700, and 26650 lithium-ion cells?
A: Yes. The strip is specifically designed for spot welding 18650, 21700, and 26650 cylindrical lithium-ion battery cells. The precision dimensions (0.15 × 10 mm or 0.2 × 10 mm) make it suitable for connecting cells in series or parallel configurations across a wide range of battery pack designs.
Q: What thickness should I choose — 0.15 mm or 0.2 mm?
A: The 0.15 mm thickness is well-suited for standard battery pack builds and is easier to weld with most spot welders. The 0.2 mm thickness offers higher current-carrying capacity and is recommended for larger, higher-power battery assemblies such as EV packs or power tools. Choose based on the current demands of your specific application.
Q: Is this copper strip safe to use with my battery cells?
A: Absolutely. Each strip is precision-machined to minimise burrs and flash, ensuring the battery membrane is not at risk of puncture during assembly. The degreased surface treatment further ensures clean, strong welds. Both variants are CE and RoHS certified, confirming compliance with key safety and environmental standards.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.