The National Fire Rescue Bureau held a regular press conference at 10 am on November 22, introducing the recent fire safety situation and current fire rescue work. At the conference, relevant experts from the Fire Rescue Bureau made authoritative judgments on new energy fires based on existing cases and experience.

In terms of lithium battery firefighting, Wang Wei, a senior commander from the office of the National Fire Rescue Bureau, pointed out: In response to the high incidence of new energy fires in recent years, we have organized the research and development of a series of new fire prevention and control technologies and products. Among them, the Distributed Fiber Optic Temperature Sensing Fire Detector can achieve early detection of heating in lithium-ion batteries and accurately locate the position of the stack where thermal runaway occurs, providing support for subsequent precise fire extinguishing and emergency disposal. The Multispectral Temperature Measurement Thermal Disaster Detection Early Warning Device can achieve early monitoring and warning of lithium battery thermal runaway, with a wide monitoring range, fast response speed, and high detection accuracy. The axial detection distance is not less than 60m, and the detection error of hot spots with a diameter of 2cm is within 1°C, suitable for early monitoring and warning of fires in lithium battery storage places. The New Liquid Nitrogen Fire Extinguishing Explosion Suppression Device can extinguish open flames within 5 seconds and prevent lithium-ion batteries from reigniting through the efficient cooling effect of liquid nitrogen. At the same time, after liquefied nitrogen gasification fills the confined space of the prefabricated cabin, it can achieve efficient inerting explosion suppression function, reaching international leading level, which can be used for fire safety protection in lithium battery application places such as energy storage stations and data centers. This achievement has been applied in places such as Foshan Nanhe Medium Voltage Energy Storage Station, Foshan Nanhai Conventional Energy Storage Station, and Shenzhen BYD User Side Energy Storage Station.

Wang Tianrui, a first-level commander from the Fire Supervision Department, pointed out: From new energy fires in recent years, we have two prominent contradictions: First, thermal runaway of lithium batteries is inevitable; second, the difficulties in fire fighting and rescue have not been effectively solved. It is suggested that efforts should be made from several aspects to break through and innovate:

Firstly, we need to change the concept of prevention and control. As we know, when a lithium battery catches fire, it explodes immediately. Traditional fire protection facilities, such as alarm sprinklers, are difficult to play a role. Therefore, we must change our concepts in building fire protection, production process, fire prevention and control, safety management, etc., to truly adapt to the actual needs of this new energy industry.

Secondly, we need to improve the standards of defense. For example, based on the characteristics of flammability and explosiveness, we should raise the design standards of factory warehouses; strengthen fire separation; limit the fire to a certain unit after it occurs, that is, limit it to the smallest unit; focus on early detection and disposal, and encourage manufacturers or factories to establish professional fire teams.

Thirdly, we need to enhance intrinsic safety. We also hope that related enterprises and research institutions will work together to strengthen scientific and technological research and development, improve production processes, especially improve the safety performance of key materials such as electrolytes and separators, accelerate the research and development of alternative products, and fundamentally solve the problem of thermal runaway of power batteries.

Fourthly, we need to solve the difficulties in fire rescue. We need to develop more effective fire extinguishing agents, improve technical tactics for new energy fires, and increase fire extinguishing efficiency. At the same time, we remind everyone present and all friends that once encountering sudden power failure or white smoke during driving an electric vehicle, we must evacuate immediately and call the police immediately to ensure personal safety.