🔥 HiTHIUM Completes World’s First Open-Door Fire Test on 5MWh BESS

HiTHIUM has completed the first open-door fire test on a full-scale battery energy storage system (BESS), validating its system-level safety design under extreme thermal conditions.

The container doors remained fully open throughout the test

Test Conditions

The test involved four 5MWh containerized DC blocks, each subjected to a compound set of stress conditions:

• 🔓 Container doors fully open (maximum oxygen exposure)
• 📏 15 cm spacing between units (minimal clearance)
• 🚫 No active fire suppression (passive-only safety)
• ⚡ 100% state of charge (SOC) (maximum energy dense)

The fire event was sustained for over 15 hours.

Results

• ✅ No fire propagation between adjacent containers
• ✅ Structural containment maintained
• ✅ Passive safety performance confirmed

The test was conducted in accordance with UL9540A and NFPA 855 standards, and witnessed by UL Solutions, U.S. certified fire engineers, and invited stakeholders.

Why It Matters

Conventional fire tests are typically conducted in enclosed containers with suppression systems active. In contrast, this test simulated a real-world worst-case scenario: open ventilation, no intervention, high density, and full charge.

The outcome demonstrates that passive safety design alone can prevent fire spread at the container level — a relevant consideration for high-density deployments or sites with limited access to external firefighting.

📖 [Source: [http://en.Hithium.com/newsroom/latest/details&69.html 2025-06-05]