Battery Energy Storage Systems (BESS): Fire-Retardant Gaskets for Housing Units.

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.