NodeMCU V3 Type-C ESP8266 Development Board – WiFi IoT Controller

Detailed Product Description

Maximum Safety for Battery Builds

When building custom battery packs for e-bikes, drones, or power banks using 21700 cells, the factory PVC wrap isn’t always enough. The positive terminal of a 21700 cell is very close to the negative outer casing. These Barley Paper Insulation Gaskets act as a second line of defense, preventing dangerous arc shorts that can occur if the PVC melts during high-heat spot welding.

High-Quality Insulation Material

These gaskets are crafted from premium barley paper, known for its excellent dielectric properties and mechanical strength. Unlike standard plastic stickers, barley paper resists high temperatures and does not deform easily under the heat of a spot welder.

Easy to Apply

Each gasket features a strong self-adhesive backing. Simply peel it off the sheet and stick it firmly around the positive pole of your battery before applying nickel strips. The thin profile ensures it doesn’t add unnecessary bulk to your pack.

Key Features

• Custom Fit: Precision die-cut specifically for 21700 Lithium-ion batteries.

• Heat Resistant: Withstands spot welding temperatures without melting or shrinking.

• Short Circuit Protection: Insulates the anode from the cathode to prevent accidental shorts.

• Self-Adhesive: Pre-applied glue ensures a secure bond to the battery cell.

• Durable: Tear-resistant and long-lasting insulation.

Technical Specifications

Why Is This Essential?

1. Prevents Thermal Runaway: A short circuit at the positive terminal is the most common cause of battery fires in DIY packs.

2. Professional Finish: Gives your battery pack a clean, uniform, and professional look.

3. Required for Spot Welding: Highly recommended whenever using pure nickel strips and a spot welder.