Trials by Fire, Unfazed by Challenges | Huawei Successfully Completes Extreme Combustion Test for Intelligent String-based Grid-type Energy Storage

Huawei Digital Power successfully completed an extreme combustion test for intelligent string-based grid-type energy storage. Witnessed by DNV and strategic customers, the test established new safety standards, demonstrating the system's ability to withstand extreme conditions without explosion or fire, while allowing more time for early intervention in real-world scenarios.

Recently, Huawei Digital Power successfully completed the extreme combustion test for intelligent string-based grid-type energy storage, under the full witness of the international authoritative independent assurance and risk management institution DNV and strategic customers. This test breaks through the traditional safety boundaries of the industry, providing innovative concepts and real-world scenario verification, setting a new milestone for safety standards in the energy storage industry.

Extreme Certification: Full-Scene Combustion Test

Based on the internationally recognized UL9540A testing method, Huawei Digital Power significantly increased the number of cells with thermal runaway, making the test far more stringent, fully validating the system's safety protection capability during extreme combustion scenarios of the intelligent string-based grid-type energy storage.

Highlight 1: 100% Mass-Produced Real Machines for Testing, Constructing Real and Complete Extreme Verification Environment
This extreme combustion test strictly followed actual application scenarios. All four groups (A/B/C/D) of intelligent string-based grid-type energy storage boxes were 100% mass-produced real machines. After charging to 100% SOC on-site, the units were deployed according to actual station minimum maintenance and safety distance requirements. The entire test was conducted without human control or interference, creating a true, complete system-level extreme verification environment.

Highlight 2: 12 Cells with Thermal Runaway, No Combustible Gases in the Box, Active Ignition without Explosion
Unlike traditional energy storage systems where the occurrence of thermal runaway in just one cell can lead to the accumulation of combustible gases inside the storage box, potentially causing fires or explosions, Huawei’s intelligent string-based grid-type energy storage box (A-box) successfully handled a scenario with 12 cells experiencing simultaneous thermal runaway. The innovative positive pressure oxygen-blocking + directional smoke exhaust combined defense mechanism ensured the quick evacuation of combustible gases, leaving no combustible gases inside the box. The active ignition did not lead to an explosion, and the safety incident was self-terminated, demonstrating extreme safety at the battery pack level without ignition or spread.

Highlight 3: Combustion Under Maximum Oxygen Supply Conditions, More Severe Test Conditions, Extreme Fire Resistance Without Spread
To further create large-scale combustion conditions, the number of thermal runaway cells was continually increased until the entire battery pack experienced thermal runaway, with maximum oxygen supply conditions provided to build harsher combustion test conditions. During the test, the highest cell temperature in the neighboring B/C/D boxes was 47°C, well below the thermal runaway threshold of the cells, and no thermal runaway spread occurred. After the test, the A-box was disassembled and verified, showing good integrity of the storage box body, fireproof layer, and internal battery packs, proving the safety capability of preventing thermal runaway from spreading in extreme scenarios.

Highlight 4: 7 Hours to Trigger Combustion, More Time for Early Intervention, Preventing Malicious Accidents
In contrast to traditional energy storage systems where thermal runaway in any one cell can instantly trigger combustion, Huawei’s innovative designs such as insulation, heat blocking, and directional smoke exhaust allowed for 7 hours to pass before the A-box triggered combustion, presenting a very slow evolution process. This means that in real application scenarios, when a cell undergoes thermal runaway, emergency responders have more time for early intervention to suppress accidents, ensuring the safety of personnel and property.
 

Technological Breakthrough: Reconstructing the Safety Logic of Energy Storage

Energy storage safety is the cornerstone of the sustainable, high-quality development of the new energy industry. Huawei Digital Power, with deep expertise in power electronics and digital technologies, has made strong investments in quality and safety, achieving innovative breakthroughs that successfully upgrade the safety protection system of electrochemical energy storage from the industry standard of box-level to battery pack-level thermal runaway prevention. Through technological innovation and extreme test verification, Huawei Digital Power has redefined the safety benchmark for energy storage systems, achieving generational leaps in thermal runaway protection, and establishing a solid technical foundation for the high-quality development of the global energy storage industry. Huawei continues to lead the industry into a new era of system-level safety and intelligent protection.

The success of this test marks a major breakthrough in the system safety field for Huawei Digital Power's intelligent string-based grid-type energy storage, establishing a multi-dimensional protection framework from the cell to the system. Huawei Digital Power is actively turning safety verification experience into industry-standard recommendations, helping the energy storage industry’s healthy and high-quality development and contributing to building a safer new type of energy infrastructure for power systems.
 

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