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Hithium's Revolutionary Fire Test at SNEC 2025

On June 11, 2025, during the 18th SNEC, Hithium, a premier player in global energy storage technologies, showcased a notable advancement in safety with the release of results from the world's first all open-door large-scale fire test of its innovative ∞Block 5MWh energy storage system. This significant event underscored Hithium's commitment to leading the charge in energy safety standards.

Engaging Event Highlights

The product safety technology sharing event, themed "Leading the Future, Forged for Safety", was not only a platform for sharing insights but also marked the achievement of certification for the large-scale fire test from UL Solutions, an internationally recognized testing authority.

Hualei Wang, the project manager overseeing the fire test, provided attendees with a detailed background on the test's objectives while screening a crucial video that effectively illustrated the methodological rigor and technical specifics behind the process. The open-door fire test involved the strategic heating of eight battery cells within a container, initiated to trigger a thermal runaway and showcase the system's resilience under extreme conditions.

The Testing Methodology

The remarkable test involved heating the cells to encourage a dramatic combustion reaction while deliberately maintaining an environment conducive to fire spread, allowing flames to interact with neighboring containers. The testing setup - featuring wide-open doors and stringent safety measures - was conducted under challenging conditions, including 100% state of charge and the deactivation of fire suppression systems.

Key Test Phases

Peak Fire Phase: As the test progressed, it reached a peak temperature of 1,372°C at the fourth hour. Yet, due to Hithium’s formidable safety interventions, the adjacent containers (B, C, D) recorded temperatures well below critical thresholds, confirming the system's efficacy in heat management.

Sustained Combustion Phase: After an extensive 15 hours, the flames were successfully extinguished, and container A remained intact, showing no signs of structural compromise. Remarkably, containers B, C, and D only suffered minor surface damages, demonstrating the system's effectiveness in preventing fire propagation.

Technological Advancements Behind the Test

The success of this groundbreaking fire test can be credited to the multi-layered safety architecture Hithium employs across its energy storage systems. At the cell level, advanced materials implemented in the anode and cathode reduce thermal thresholds significantly. Also, the module level integrates low-conductivity insulation and flame-retardant properties to guard against escalation. Finally, at the system level, robust container frames bolster structural integrity even amidst extreme thermal conditions.

Validation and Recognition

During this significant event, UL Solutions presented Hithium with a certification, acknowledging its adherence to the UL 9540A and NFPA 855 standards. Qifeng Xiao, General Manager of Asia Pacific’s Energy and Automation Division at UL Solutions, praised Hithium for conducting the first open-door fire test under full oxygen exposure. This commendation validated Hithium's pioneering position in developing self-contained fire protection systems and provided essential insights towards establishing future global energy storage safety standards.

A Vision for the Future

This revolutionary fire test elucidated not just Hithium's technical prowess but also showcased a strong belief in the safety performance of its energy systems through a fully transparent testing process. As the energy sector continues to transition towards greener solutions, Hithium confirms its commitment to ensuring safety through continuous innovation.

Moving forward, Hithium's efforts focus on tightening the safety measures within the energy storage domain, paving the way for sustainable energy advancements that uphold the highest safety standards.