Insulator Rings 18650 / 21700
Cell Supply
Barley Insulation Paper – Battery Pack Construction
Insulator rings are an essential safety component for cylindrical lithium-ion battery pack construction. Designed to sit on the positive end of 18650 or 21700 cells, they provide an additional insulating barrier around the positive terminal, helping to reduce the risk of accidental shorts during pack assembly.
Commonly used alongside nickel strip, busbars, barley paper, fish paper, and heat shrink, these rings are widely used in DIY and professional battery pack building.
Key Features
- Suitable for 18650 and 21700 cells – available in sizes to suit common cylindrical lithium-ion formats
- Helps prevent short circuits – adds insulation around the positive terminal
- Ideal for pack assembly – used before spot welding nickel strip or busbars
- Thin and lightweight – provides protection without adding unnecessary bulk
- Easy to apply – simply position over the positive terminal before welding or final assembly
Usage
- Insulator rings are typically applied to the positive end of each cell before nickel strip, busbars, or other conductive components are installed. They help protect the cell shoulder and outer can from accidental contact with the positive terminal area.
Applications
Suitable for:
- DIY battery pack building
- E-bike and EV battery assemblies
- Power tools and high-drain battery packs
- Energy storage systems
- Battery repair and refurbishment
- General electronics and prototyping projects
- 18650 battery packs
- 21700 battery packs
Priced per sheet of 60 rings
£0.00
£2.00