On March 18, the Ministry of industry and information technology released the key points of automobile standardization in 2022 and proposed to start the revision of relevant standards for the safety of electric vehicle power battery, so as to further improve the level of thermal runaway alarm and safety protection of power battery; We will accelerate the research on a series of standards for remote service and management of electric vehicles, revise the standards for post collision safety requirements of fuel cell electric vehicles, and further strengthen the safety guarantee of electric vehicles. Carry out pre research on the maximum power test method standard of hybrid electric vehicles, promote the preparation and revision of standards such as power performance test methods of pure electric vehicles and hybrid electric vehicles, technical requirements and test methods of drive motor system, and continuously improve the standard system of complete electric vehicles and key components.
It is reported that in 2020, the Ministry of industry and information technology organized and formulated three mandatory national standards: gb183842020 safety requirements for electric vehicles, gb380322020 safety requirements for electric buses and gb380312020 safety requirements for power batteries for electric vehicles, which will be implemented from January 1, 2021. Among them, the thermal diffusion test of the battery system is added to the safety requirements for power batteries for electric vehicles, which requires that the battery system will not catch fire or explode within 5 minutes after the thermal loss of a single battery, and a safe escape time is reserved for passengers.
In recent years, while the new energy vehicle industry has ushered in an explosion, more and more vehicle fires and explosions have been caused. It is reported that the proportion of new energy vehicles on fire caused by batteries is the highest, of which battery failure accounts for 33% and battery soaking or soaking accounts for 4%.
In order to improve the safety level of power batteries, according to the reporter of Securities Daily, a number of enterprises have released non fire battery packs and related schemes in the past year. These include Contemporary Amperex Technology Co.Limited(300750) "never fire" 811 battery, Byd Company Limited(002594) blade battery, Great Wall Dayu battery, lantu "amber" and "mica" battery system, polar krypton automobile "polar core" battery pack and gac-e'an magazine battery. Enterprises have gathered to develop "no fire" batteries, which shows that the market attaches importance to battery safety.
Insiders pointed out that the core of no fire is that the battery does not have heat diffusion. If this revision can make requirements for the non heat diffusion of the battery pack, it will greatly improve the use safety of new energy vehicles. The exploration of this technology is a long-term process, and all parties need to work together to achieve the goal as soon as possible.
