Huawei Digital Energy successfully completed the large-scale combustion test of industrial and commercial network energy storage

Huawei Digital Power, witnessed by TÜV Rheinland Group (hereinafter referred to as "TÜV Rheinland"), successfully completed the industry's first energy storage cabinet fire test for its commercial and industrial wind-liquid smart-cooling grid-forming energy storage solution (hereinafter referred to as "commercial and industrial grid-forming energy storage") based on the latest UL9540A:2025 standard at the State Key Laboratory of Fire Safety. This large-scale combustion test, with its extremely stringent test conditions, once again sets a new safety benchmark for the industry.

Extreme Challenge: The Harshest Testing Environments

This test created an unprecedentedly rigorous testing environment for the industry, comprehensively verifying the safety performance of the energy storage system under extreme conditions. The test adopted a whole-pack overcharge trigger method, simultaneously inducing thermal runaway in 60 battery cells at once, achieving an extreme challenge of "ignition at peak." Compared with traditional tests that trigger thermal runaway in only a single cell or a small number of cells, the severity of this test is exponentially higher.

The rigor of the test is also reflected in the following: ① The open-door combustion protocol defined in UL9540A:2025 is adopted, actively providing the maximum oxygen supply; ② All PACKs are charged to a fully charged state of 100% SOC; ③ All active and passive fire protection systems are shut down, leaving the energy storage system, under conditions of full energy and full combustion, to rely entirely on its own design to "withstand" the ordeal of intense fire.

Hardcore Strength: A Five-Level Protection System Builds a Solid Safety Defense Line

Under such extreme test conditions, Huawei's commercial and industrial grid-forming energy storage system demonstrated outstanding safety performance thanks to its innovative five-level protection design:

Cell spacing thermal insulation design: effectively slows down the spread of thermal runaway between cells, providing the first barrier for system safety;

PACK all-metal enclosure: a full metal enclosure that withstands temperatures over 1500°C, maintaining structural integrity even in raging fires and maximizing the reduction of fire damage;

Positive-pressure oxygen blocking and directional smoke exhaust design: The proprietary combined defense of positive-pressure oxygen blocking and directional smoke exhaust effectively diverts combustibles and significantly reduces fire impact;

Fireproof labyrinth design: all sealing interfaces of the energy storage cabinet adopt a labyrinth structure, effectively blocking flame spread paths;

Full-surface fire reinforcement for the cabinet: armor for the cabinet, providing comprehensive fire protection.

Data Speaks: Key Metrics Demonstrate Outstanding Performance

The key data collected during the test fully proved the safety and reliability of Huawei's commercial and industrial grid-forming energy storage system. When the fire scene temperature reached as high as 961°C, the maximum cell temperature in the adjacent cabinet was only 45.3°C, far below the cell venting temperature threshold, meeting the requirements of the UL9540A:2025 standard, and no inter-cabinet propagation occurred during combustion.

The maximum heat release rate (HRR) recorded during the test was 3 MW, and the total combustion duration was less than 3 hours before self-extinguishing. Under the door-open burning condition, the system achieved rapid and concentrated heat release, demonstrating excellent thermal management capability.

Huawei Digital Power's extreme combustion test was witnessed by TÜV Rheinland, which not only verified the safety performance of Huawei's commercial and industrial grid-forming energy storage under extreme conditions, but also provided the industry with valuable safety verification experience and a template. Huawei Digital Power commissioned the State Key Laboratory of Fire Safety to jointly carry out collaborative technical research.

On November 18 this year, the "Full Lifecycle Safety Quantitative Assessment System for Electrochemical Energy Storage Systems," jointly applied for by Huawei Digital Power, passed authoritative appraisal by industry experts and academicians, reaching an internationally leading level. This extreme combustion test further verified, in a real-world scenario, the leading strength of Huawei's energy storage system in core safety technologies such as thermal runaway prevention and control and flame spread containment.

Huawei Digital Energy, with the success of this extreme combustion test, has demonstrated a new level of commercial and industrial energy storage safety to the industry, setting a milestone for large-scale safe application and healthy development of the sector.