G10 Insulation Materials in EV: Enhancing Battery & Motor Safety

G10 (often referred to as G10 Epoxy Glass Laminate) is a high-performance composite material recognized as one of the...

G10 (often referred to as G10 Epoxy Glass Laminate) is a high-performance composite material recognized as one of the toughest and most reliable electrical insulators in the industrial sector.
In the field of New Energy Vehicles (NEVs), G10 insulation material (and its flame-retardant version, FR-4) has become a critical material for ensuring the safety of core electrical systems, thanks to its excellent dielectric strength, mechanical stability, and thermal resistance.

Its applications are primarily concentrated in the following three core areas:

1. Power Battery Pack Systems

This is the most extensive and vital application area for G10, where it provides both physical support and electrical isolation:
Module Insulation Plates: G10 insulation sheets installed between battery cells or modules prevent high-voltage short circuits and help mitigate energy diffusion during localized thermal runaway.
End Plates and Support Structures: Leveraging its high mechanical strength and low deformation, G10 is often machined into battery pack end plates to provide structural support for cells while ensuring insulation from the outer chassis.
BMS Support Substrates: It provides a stable physical mounting platform and electrical insulation for sensitive electronic components within the Battery Management System (BMS).

2. Drive Motors and Electronic Control Systems

Internal Motor Insulation: G10 is used for slot wedges and phase insulation within drive motors. It prevents electrical breakdown between windings under conditions of high-speed rotation and high temperatures (typically withstanding 130°C to 180°C).
High-Voltage Distribution and Busbars: It serves as insulating brackets for busbars, withstanding the thermal stress of high-current flow and ensuring safe electrical clearance between high-voltage lines and the vehicle structure.

3. Charging Infrastructure (Charging Piles)

Internal Structural Insulators: Charging piles contain complex transformation and rectification modules. G10 composites are frequently used to manufacture brackets, fixings, and electrical barriers to prevent leakage and internal short circuits.
Weather-Resistant Housing Support: In outdoor charging piles, G10’s superior moisture and corrosion resistance ensures long-term reliability in harsh environments.

4.Consult the manufacturer

As a professional manufacturer of electrical insulation materials for motors and transformers, Xujue Electrical specializes in providing stable and reliable insulation solutions for new energy vehicle drive motors and related components.

If you are looking for G10 Epoxy Sheet materials, we can provide customized solutions according to your specific requirements, along with free samples for testing and evaluation.

Summary of Technical Advantages

Lightweight: A high strength-to-weight ratio helps reduce vehicle weight, directly improving driving range.
Electrochemical Corrosion Resistance: It maintains high insulation performance even during long-term exposure to electrolytes.
High Safety: The FR-4 grade flame retardancy (UL94 V-0) is a fundamental requirement for onboard high-voltage equipment, effectively preventing the spread of fire caused by electrical faults.