On April 1, 2026,, the new edition of "design standard for electrochemical energy storage power station" (GB/T 51048-2025) was officially implemented. Compared with the 2014 edition, the new edition of the standard for the first time incorporated prefabricated cabin into the national standard, clearly requiring lithium ion and sodium ion battery room, battery prefabricated cabin should be set up automatic fire extinguishing system, it also stipulates that dry pipes and interfaces that can transport fire fighting water or other liquid extinguishing agents shall be reserved..

This means that the focus of energy storage safety design is sinking from "station level" to "PACK level.

Why is PACK fire fighting so critical? Traditional energy storage fire protection schemes usually deploy fire extinguishing systems at the cabin level. Once the battery loses control of heat, the fire extinguishing agent needs to fill the whole cabin before reaching the heat source. However, the transmission speed of thermal runaway of lithium batteries is extremely fast. When the cabin-level system responds, adjacent cell may have been ignited. The research team of Chinese Academy of Sciences focused on the industry pain point of the energy storage PACK, which is difficult to suppress the internal thermal runaway and the fire is easy to reignite. The system simulated 52 series of liquid-cooled energy storage packs in overcharge, real thermal runaway scenarios under faults such as short circuit.

the core logic of PACK fire protection is to reduce the protection unit from "cabin" to "package". The ultimate pressure test of Huawei SmartLi 5.0 shows the practical effect of this idea: its PACK-level positive pressure oxygen resistance design, through the tail relief pressure valve directional discharge of combustible gas, internal always maintain positive pressure, external oxygen cannot enter, and open flame is difficult to appear in the PACK.. The PACK-level fire protection scheme of medium vehicle energy storage can quickly cool out of control cell to below 70 ℃ within 30 seconds, and the maximum temperature of out of control cell surrounding cell cannot exceed 40 ℃, effectively reducing "a PACK of fire, risk of whole cabin spread.

Dongguan Juneng New Energy Technology Co., Ltd. adopts a multi-layer protection strategy in PACK safety design, locks heat in local areas through aerogel heat proof mat, and releases high temperature gas with pressure relief channels, the BMS temperature monitoring strategy implements hierarchical response to abnormal temperature rise. The company has accumulated more than 10 years of engineering experience in battery pack structure design and thermal management application.

It is worth noting that international standards are also tightening simultaneously. ISO 3941:2026 makes lithium battery fires officially have independent Class L classification, UL 9540A sixth edition has tightened the requirements for large-scale fire testing, NFPA 855:2026 mandatory requirements for hazard mitigation analysis. For energy storage equipment manufacturers, when choosing PACK Partners, a specific question worth asking is: your battery packIn the thermal runaway spread test, what is the maximum temperature of adjacent cell and how long will the whole package fail structurally? Suppliers who can give specific figures are usually more trustworthy than those who can only say "conform to the national standard.