Core Viewpoint - The recent trend of large-scale fire tests among domestic energy storage companies is aimed at enhancing product safety credibility and meeting international standards, which is becoming a necessary requirement for entering overseas markets [1][4][5]. Group 1: Importance of Fire Tests - Energy storage companies are increasingly conducting large-scale fire tests to validate product safety and compliance with international standards, which enhances competitiveness and customer trust [3][4]. - The fire tests are costly, with expenses reaching millions, but they provide critical data for insurance participation in energy storage investments and operations [2][3]. - Successful fire tests can serve as a key endorsement for market entry, particularly in overseas markets where safety standards are stringent [3][4]. Group 2: Industry Standards and Regulations - While fire tests are not yet mandatory in China, international clients are beginning to require such certifications, indicating a shift towards making these tests a standard requirement [4][5]. - The GB/T 44026-2024 standard outlines safety requirements for energy storage systems, emphasizing the need for products to prevent fire and explosion during thermal runaway events [5][6]. - The development of industry standards is ongoing, with discussions among organizations like the American Fire Association and Canadian Standards Association to establish fire test protocols [4][5]. Group 3: Technological Advancements and Safety Improvements - Companies are adopting advanced safety designs, such as using more stable chemical systems and implementing multi-layered safety protections to minimize risks [6][7]. - The shift towards safer battery materials, such as lithium iron phosphate, is reducing the likelihood of thermal runaway incidents, contributing to overall industry safety improvements [6][7]. - Liquid flow batteries, like zinc-iron flow batteries, are recognized for their inherent safety due to their non-flammable materials and stable operating conditions [7].

Core Viewpoint - The article emphasizes the importance of safety in the rapidly growing global energy storage industry, highlighting the extreme testing conducted by leading companies to validate the safety performance of their energy storage systems under severe conditions [1]. Group 1: Sunlight Power - Sunlight Power conducted the world's first large-scale combustion test of its PowerTitan1.0 system in June 2024, followed by a significant investment of 30 million for the PowerTitan2.0 test in November 2024 [1]. - The PowerTitan2.0 system withstood 25 hours and 43 minutes of continuous burning, demonstrating its robust protective capabilities and preventing fire spread [2]. - During extreme conditions, the system maintained structural integrity and prevented heat propagation, showcasing its excellent fire resistance and impact performance [3]. Group 2: BYD Energy Storage - BYD's MC Cube energy storage system underwent testing in December 2024, adhering to CSA TS-800 large-scale fire testing standards [6]. - The test revealed that while the internal temperature exceeded 1000℃, adjacent battery cabinets remained below 60℃, confirming the system's effective fire isolation design [6]. - The MC Cube demonstrated outstanding fire resistance and structural integrity, preventing fire spread and ensuring safety for personnel and the environment [6]. Group 3: Huawei Digital Energy - Huawei's intelligent string-type energy storage system was tested in December 2025, following international UL9540A standards with increased thermal runaway cell counts [7]. - The system effectively managed a scenario with 12 cells experiencing thermal runaway, utilizing innovative pressure and smoke management mechanisms to prevent combustion [8]. - The test confirmed the system's ability to maintain low temperatures in adjacent units, demonstrating its safety under extreme conditions [8]. Group 4: Hichain Energy Storage - Hichain's ∞Block 5MWh system was tested in June 2025 under UL9540A and NFPA855 standards, with open cabinet conditions to simulate extreme fire scenarios [9]. - The system successfully prevented heat propagation between cabinets even at temperatures exceeding 1300℃, validating its thermal isolation capabilities [10]. - The test confirmed the system's reliability and high safety standards without external fire protection [11]. Group 5: Canadian Solar - Canadian Solar's SolBank 3.0 system was tested in June 2025, adhering to CSA TS-800 standards for large-scale fire testing [12]. - The test demonstrated that the SolBank 3.0 effectively contained fire within the target unit, showcasing its superior passive fire protection design [13]. Group 6: Kelu - Kelu's Aqua C2.5 5MWh liquid-cooled energy storage system was tested in June 2025, following CSA TS-800 standards [14]. - The test involved a 59-hour continuous burn, with the internal temperature reaching 1300℃, yet the system maintained structural integrity and functionality [17]. - The Aqua C2.5 effectively prevented thermal runaway between units, proving its scalability for large energy storage stations [17]. Group 7: Ruipu Lanjun - Ruipu Lanjun's Powtrix® battery cabin was tested in June 2025 under CSA TS-800 extreme safety testing [18]. - The system endured approximately 14 hours of burning under severe conditions, demonstrating exceptional safety and reliability [18]. Group 8: Trina Storage - Trina's Elementa energy storage cabinet was tested in September 2024, following guidelines from the China Academy of Building Research [19]. - The test validated the effectiveness of the fire suppression systems and the overall safety of the energy storage design, with no signs of re-ignition after 24 hours [21].