Description

Technical Parameters

Product Overview

Our EV Battery Cell Insulation Mica Pad is a high-performance flame-retardant insulation material specifically designed for electric vehicle battery packs. Made from high-quality phlogopite or muscovite mica paper, bonded with high-temperature resistant silicone resin, this pad provides exceptional electrical insulation, thermal protection, and fire barrier performance.

It is widely used between battery cells, between cell modules, and on the top cover of battery packs to prevent thermal runaway propagation and ensure the safety of the entire battery system.

Key Features

Feature	Benefit
Excellent Electrical Insulation	Dielectric strength up to 20 kV/mm
High Temperature Resistance	Withstands continuous operation up to 800°C – 1000°C
Outstanding Fire Barrier	Prevents thermal runaway propagation between cells
Thin & Lightweight	Available from 0.2 mm to 2.0 mm thickness
Good Mechanical Strength	Tear-resistant, puncture-resistant, and flexible
Environmentally Friendly	Halogen-free, non-toxic, no smoke emission
UL Certified	UL94 V-0 flame rating

Typical Applications in EV Battery Packs

Application Area	Specific Use
Between battery cells	Prevents thermal runaway spread from one cell to adjacent cells
Between cell modules	Provides fire barrier and electrical insulation between modules
Battery pack top cover	Protects passenger cabin from high temperature in case of fire
Busbar insulation	Covers high-voltage busbars to prevent short circuits
Battery junction box / BDU	Heat shield and insulation for power distribution units

Technical Specifications (Typical Values)

Parameter	Value
Material Type	Phlogopite / Muscovite mica
Binder	Silicone resin (high temperature resistant)
Color	Silver white / Golden / Light brown
Thickness	0.2 mm – 2.0 mm (customizable)
Density	1.8 – 2.2 g/cm³
Continuous Operating Temp	-40°C ~ +800°C (phlogopite) / +1000°C (muscovite)
Dielectric Strength	≥ 15 – 20 kV/mm
Volume Resistivity	≥ 10¹⁵ Ω·cm
Flame Rating	UL94 V-0
RoHS Compliant	Yes
Halogen Free	Yes

Product Construction Options

Option	Description
Single layer mica sheet	Basic insulation and fire protection
Multi-layer laminated sheet	Higher mechanical strength and puncture resistance
Mica with adhesive backing	Self-adhesive version for easy assembly
Mica with PET film	Enhanced tear resistance and handling
Custom die-cut shapes	Cut to specific cell or module dimensions

Why Choose Our Mica Pads for EV Batteries

Advantage	Description
EV Industry Proven	Widely used in prismatic and pouch cell battery packs
Thermal Runaway Protection	Helps meet GB 38031, ECE R100, and EU Battery Regulation safety standards
Custom Fabrication	Available in sheets, rolls, or precision die-cut parts
Fast Sample Service	Samples ready within 3–5 business days
Competitive Pricing	Direct from manufacturer, no middleman markup

Packaging & Storage

Item	Information
Packaging	Carton boxes with anti-moisture bags
Storage Conditions	Store in dry, cool environment (< 40°C, < 70% RH)
Shelf Life	24 months in original sealed packaging

Certifications

Standard	Status
UL94 V-0	✅ Certified
RoHS	✅ Compliant
REACH	✅ Compliant
IATF 16949	✅ Available upon request

Comparison: Mica Pad vs Traditional Insulation Materials

Property	Mica Pad	PC/PVC Sheet	Silicone Foam	Ceramic Paper
Max Temperature	800-1000°C	< 120°C	< 200°C	> 1000°C
Flame Resistance	UL94 V-0	UL94 V-0	UL94 V-0	Non-flammable
Dielectric Strength	20 kV/mm	15 kV/mm	6 kV/mm	10 kV/mm
Flexibility	Medium	Rigid	High	Low
Cost	Medium	Low	High	High
Best Application	Thermal runaway barrier	General insulation	Sealing & cushioning	High temp only

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