FR-4 Epoxy Fiberglass Board in Power and Energy Storage Systems

Explore how FR-4 epoxy fiberglass boards provide high-voltage insulation, UL94 V-0 flame retardancy, and mechanical support in BESS, battery modules, PDUs, and power transformers.

FR-4 Epoxy Fiberglass Board in Power and Energy Storage Systems

In modern power transmission, distribution, and battery energy storage systems (BESS), FR4 epoxy fiberglass board plays a crucial role in safety protection and structural support due to its mechanical strength, high electrical insulation, and flame-retardant properties.

I. Power Systems: Transmission, Distribution & Transformers

Box-Type Substations and Ring Main Units (RMUs): Widely used as phase barriers and isolation partitions between busbar, circuit breaker, and cable compartments to prevent high-voltage creeping, phase-to-phase short circuits, and arc propagation. High bending strength busbar support clamps ensure heavy copper/aluminum busbars stay secure under massive short-circuit currents.

Power Transformers and Reactors: Served as end insulation spacers and strips at winding ends to bear continuous axial compression while maintaining cooling air ducts. Core clamp gaskets isolate the transformer core from metal clamps to prevent eddy current overheating.

High-Voltage Circuit Breakers: Functioning as arc-chute bases, insulating operating rods, and contact support components under frequent switching and arc ablation.

II. Energy Storage Systems (ESS): Renewable & Battery Storage

Battery Modules & Cell Insulation: Acts as module end/side plates to absorb compression forces and isolate cells from the metal enclosure, as well as providing thermal/electrical isolation between cell groups.

BMS Protection & Isolation: Used as substrates and support plates for BMS acquisition boards and high-voltage sampling wire gaskets to prevent high-voltage currents from bleeding into low-voltage weak-current control circuits.

PDU (Power Distribution Unit): Precision-machined into internal insulation partitions and busbar supports to eliminate positive-to-negative short-circuit risks, offering sturdy mounting for high-current fuses and DC contactors.

Liquid-Cooled Storage Cabinets: Features extremely low water absorption (<0.1%), ensuring zero insulation performance degradation or mold growth even during minor coolant leaks.

III. Summary of Core Performance Advantages