Product Description
FR4 Epoxy Glass Fiber Insulation Board | Lithium Battery Pack Insulator
The FR4 Epoxy Glass Fiber Insulation Board is a high-performance, flame-retardant material specifically designed for lithium battery pack insulation. Made from epoxy resin and woven fiberglass cloth, this 3240 epoxy sheet offers excellent electrical insulation, mechanical strength, and thermal stability. It is widely used in 18650, 21700, prismatic, and LiFePO₄ battery packs to prevent short circuits, provide structural support, and enhance safety.
📋 Product Specifications
- Product Name: Epoxy Fiberglass Laminate Sheet / FR4 Insulation Board
- Model Number: Insulating Sheet / 3240 Epoxy Sheet
- Material: Epoxy Phenolic Fiberglass (Glass fiber reinforced epoxy resin)
- Type: Insulation board, electrical insulation sheet, battery spacer
- Application: Lithium-ion battery pack insulation, PCB insulation, electrical component isolation
- Tensile Strength: Excellent – high mechanical durability
- Color Options: Black, white, red, green, yellow, grey, blue, and custom colors available
- Size: Fully customizable – we cut to your exact dimensions, shapes, and hole patterns
- Thickness: 0.2mm – 10mm (customizable)
- Flammability Rating: UL94 V-0 (self-extinguishing)
- Dielectric Strength: ≥20 kV/mm (excellent electrical insulation)
- Operating Temperature: -40°C to 130°C
✨ Key Features & Benefits
⚡ Superior Electrical Insulation
High dielectric strength prevents short circuits between cells and terminals, ensuring battery pack safety.
🔥 Flame Retardant (UL94 V-0)
Self-extinguishing material enhances fire safety in lithium battery packs.
🛡️ High Mechanical Strength
Excellent tensile and flexural strength provides structural support and prevents deformation under pressure.
🔧 Fully Customizable
Cut to any shape, size, or hole pattern to fit your battery pack design perfectly.
🌡️ Wide Temperature Range
Maintains performance from -40°C to 130°C, suitable for demanding environments.
🎨 Multiple Color Options
Available in black, white, red, green, yellow, grey, blue, and custom colors for coding or aesthetics.
🔋 Common Applications in Battery Packs
- Cell Spacers & Separators: Prevents direct contact between cells in cylindrical and prismatic battery packs
- Top & Bottom Insulators: Covers nickel strip connections and protects terminals
- BMS Mounting Plates: Provides insulated base for battery management systems
- End Plates & Side Panels: Structural insulation for battery modules
- Busbar Insulation: Isolates high-current connections from enclosure and cells
- PCB & Electronic Isolation: Protects sensitive components from contact with battery cells
📐 Customization Services
• Laser cutting, CNC routing, and die-cutting for high precision
• Custom shapes, slots, mounting holes, and complex geometries
• Thicknesses from 0.2mm to 10mm
• Any color and surface finish available
• Prototype to mass production quantities
• Quick turnaround with CAD support (DXF, DWG, PDF accepted)
🖼️ Product Gallery
📞 Why Choose Our FR4 Insulation Boards?
✅ Premium Quality Materials
Made from high-grade 3240 epoxy glass fiber laminate – consistent thickness, smooth surface, no delamination.
🔧 Expert Custom Fabrication
Years of experience in battery pack insulation, understanding the exact requirements for safe and reliable insulation.
📦 Fast Turnaround
From prototypes to large orders, we deliver quickly without compromising quality.
🌍 Global Shipping
We ship worldwide with secure packaging to prevent damage during transit.
Send us your drawing or specification, and we’ll provide a competitive quote within 24 hours. We also offer sample kits for testing and validation.
Primary: FR4 insulation board · epoxy glass fiber sheet · lithium battery insulation · battery pack insulator · 3240 epoxy sheet · flame retardant board · battery spacer · PCB insulation material
Performance: UL94 V-0 · dielectric strength 20kV/mm · high tensile strength · -40°C to 130°C · custom cut FR4 · laser cutting
Applications: 18650 battery insulation · prismatic cell spacer · LiFePO₄ pack insulation · BMS mounting plate · busbar insulator · battery module end plate
