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Case Study: Silicone Potting Compound for Energy Storage Systems and BESS in Southeast Asia

Southeast Asia’s energy storage market is expanding quickly, driven by solar adoption, grid stability projects and portable power demand. Energy storage systems (BESS), outdoor power supplies and high-voltage transformers must operate reliably outdoors for years despite intense heat, humidity and monsoon rain. This case study describes how the two-component silicone potting compound HN-8806A/B-2 delivered durable encapsulation for a regional energy storage manufacturer.

Customer Background

The customer produces battery energy storage modules and outdoor power supply units for residential, commercial and telecom backup applications across Southeast Asia. Its products are installed in coastal and tropical environments where moisture, salt air and temperature swings are severe, and where a single electrical fault can compromise an entire storage installation.

The Challenge

• Long outdoor service life demanded insulation that resists moisture and ageing for years.
• Battery modules and power electronics generate significant heat that must be conducted away.
• Enclosures faced –50°C to +250°C extremes without cracking or degrading.
• Flame retardancy and RoHS compliance were required for safety and export certification.
• Automated filling lines needed a consistent, bubble-free 1:1 material.

The Solution: HN-8806A/B-2 Silicone Potting Compound

HN-8806A/B-2 is a double-component, room-temperature or heat-curing silicone filling glue that cures into a high-performance elastomer. It provides excellent electrical performance, ageing resistance, wide temperature tolerance, heat conduction, moisture-proofing and deep curing with very low shrinkage. It releases no heat or by-products, does not corrode sealed components, and meets RoHS and related environmental requirements — ideal for long-life energy storage hardware.

Key Technical Parameters

Implementation

Components A and B, supplied in 25 kg barrels at a 100:100 ratio, were stirred evenly before use and mixed thoroughly in a clean container, then vacuum de-gassed to remove bubbles. For automated filling, both parts were evacuated for 5–10 minutes and proportioned to a static mixer with metering pumps, delivering a consistent ratio and uniform fill across energy storage modules. Sub-assemblies were cleaned, potted in parts where size demanded, and cured at room temperature (1–2 hours) or at 80°C for 0.2 hours.

Results & Benefits

• Long-term insulation: volume resistivity 1.0 * 10¹⁶ Ω·cm and dielectric strength 18–25 kV/mm secured high-voltage storage hardware.
• Moisture & ageing protection: water absorption of only 0.01–0.02% shielded modules from tropical humidity and salt air.
• Efficient heat dissipation: thermal conductivity ≥ 0.76 W/m·K moved heat away from battery modules and transformers.
• Wide temperature stability: reliable from –50°C to +250°C in outdoor installations.
• Safety & compliance: UL 94 V-0 flame retardancy and RoHS compliance met certification and export requirements.

Conclusion

Using HN-8806A/B-2, the customer improved the reliability, safety and service life of its energy storage systems and outdoor power supplies, while making automated potting more efficient. For Southeast Asia’s fast-growing storage market, high-performance silicone encapsulation is a proven way to build more durable, export-ready products.