Battery Energy Storage Systems (BESS): Fire-Retardant Gaskets for Housing Units
Problem Statement
Standard EPDM gaskets degrade when exposed to thermal runaway events (200-300°C) in BESS units. Compression set exceeds 50% after 500 cycles at 150°C, leading to seal failure and electrolyte leakage.
Material Science Analysis
EPDM fails due to saturated hydrocarbon backbone oxidation at >150°C. Fluorosilicone (FVMQ) offers superior thermal stability but lacks mechanical strength for compression loads. RubberQ’s solution uses HNBR with 36% acrylonitrile content and aluminum trihydrate (ATH) filler:
- Acrylonitrile provides hydrocarbon fuel resistance
- ATH decomposes endothermically at 220°C, absorbing heat
- Peroxide curing minimizes compression set
Technical Specifications
| Parameter | HNBR-ATH (RubberQ-782) | Standard EPDM | FVMQ |
|---|---|---|---|
| Shore A Hardness | 75 ±3 | 70 ±5 | 60 ±4 |
| Tensile Strength (MPa) | 18.5 | 12.2 | 7.8 |
| Elongation at Break (%) | 320 | 400 | 250 |
| Continuous Temp Range (°C) | -40 to +175 | -50 to +150 | -60 to +200 |
| Compression Set (22h @ 150°C) | 18% | 52% | 30% |
| UL94 Rating | V-0 | HB | V-1 |
Standard Compliance
RubberQ’s IATF 16949 processes ensure:
- Batch-to-batch viscosity variation <5% (ASTM D1646)
- Adhesion strength >3.5 MPa to aluminum (ASTM D429 Method B)
- Particle contamination Class 5 per ISO 16232
For custom material compound development or IATF 16949 documentation, consult RubberQ’s engineering department.
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