18650 Li-ion Battery Insulation Gasket Barley Paper – Positive Terminal Safety Ring (10 Pcs)

The #1 Safety Upgrade for DIY Packs

When assembling 18650 battery packs, relying solely on the factory PVC wrapper is risky. The heat from spot welding or vibration over time can melt the wrapper, leading to a catastrophic short circuit. These Barley Paper Insulation Gaskets are heat-resistant and durable, ensuring your battery positive terminals remain electrically isolated from the negative can.1

Professional Grade Material

Crafted from high-quality “Fish Paper” (Barley Paper), these gaskets offer superior dielectric strength and mechanical toughness compared to standard plastic stickers.2 They are the industry standard for professional battery pack manufacturing.

Simple Peel-and-Stick Application

No glue needed! Each ring comes with a strong self-adhesive backing. Just peel it off the sheet and center it over the positive button top or flat top of your 18650 cell before welding your nickel strips.

Key Features

• Precise Fit: Die-cut specifically for 18650 Li-ion batteries (standard size).

• Thermal Protection: Resists high temperatures during soldering or spot welding.³

   

• Short Circuit Prevention: effectively blocks arc shorts at the positive terminal.

• Strong Adhesion: Stays firmly in place during assembly and operation.

• Ultra-Thin: Adds safety without increasing the overall length of the cell significantly.

Technical Specifications

Why Is This Important?

• Safety First: The positive terminal and negative shell of an 18650 battery are only millimeters apart. This gasket bridges that gap safely.

• Longevity: Protects the battery wrapper from wear and tear.

• Professional Finish: Gives your DIY power walls and e-bike packs a clean, manufactured look.