21700 Battery Cell 4-Cell Solid Fish Paper Spacer, Flame Retardant High Temperature Insulation Gasket for Lithium Battery Pack

Product Description:

21700 Lithium Battery Cell 4P Solid Fish Paper Insulation Gasket is specially designed for lithium battery packs and power battery modules. Made from high-quality fish paper (vulcanized fiber paper), this insulation washer provides excellent electrical insulation, high temperature resistance, and flame-retardant performance.

The solid 4-cell design ensures accurate positioning and reliable protection between battery cells, helping to prevent short circuits, abrasion, and electrical leakage during battery assembly and operation. It is widely used in EV batteries, energy storage systems, power tools, electric vehicles, and other lithium-ion battery applications.

Features:

• Designed for 21700 cylindrical lithium battery cells
• 4-cell solid structure for stable positioning and insulation protection
• Excellent electrical insulation performance
• High temperature resistant and flame retardant material
• Prevents short circuits and improves battery safety
• Available in customized sizes, thicknesses, and adhesive options
• Suitable for automated battery pack assembly and module production

Material: Fish Paper / Vulcanized Fiber Paper
Application: Lithium Battery Pack, EV Battery Module, Energy Storage Battery, Power Tools Battery

Customization:
We provide OEM/ODM customization services, including die-cut shapes, thickness, dimensions, adhesive backing, and special flame-retardant requirements.