(Reporter Wang Wei) The Beijing Youth Daily reporter learned from the Municipal Market Supervision Bureau that the Beijing electric bicycle group standard "Technical Specification for Lithium-ion Power Batteries for Electric Bicycles" was recently revised and will be officially implemented on June 19. A total of 19 items were added to the group standard, and 20 related technical requirements were supplemented and improved. The project of mutual recognition and collaborative identification between battery pack and whole vehicle is the first time officially listed in the national standard. By increasing the mutual recognition and cooperation function of the battery pack, the mutual recognition and cooperation identification between the battery pack and the whole vehicle and between the battery pack and the charger can be strengthened, the illegal assembly and modification behavior can be curbed, and the explosion and fire risks caused by the mismatch between the electric bicycle and the battery can be prevented. In addition, the standard requires that when the battery reaches 80℃, an alarm sound should be given within 30 seconds.
According to reports, the newly revised group standard highlights the safety of products. On the basis of the quality and safety management practice of electric bicycles in Beijing, the requirements of mutual recognition and collaborative identification of battery and whole vehicle, battery (monomer) identification, acupuncture, thermal abuse, overdischarge and external short circuit are put forward for the first time. The group standard takes the lead in applying the mutual recognition and collaborative identification of battery and charging device, the over-temperature alarm function of battery, and increases the safety items such as battery handle strength and salt spray. The group standard also specifically defines the functions of battery management system and refines it.
Among them, the mutual recognition and collaborative identification of battery pack and vehicle, thermal abuse of battery (monomer) and acupuncture detection items are officially included in the standards for the first time in China. By increasing the mutual recognition and cooperation function of the battery pack, the mutual recognition and cooperation between the battery pack and the whole vehicle, and between the battery pack and the charger are strengthened, the illegal assembly and modification behavior is curbed, and the explosion and fire risks caused by the mismatch between the electric bicycle and the battery are prevented; By increasing the items of battery (monomer) acupuncture and thermal abuse detection, the safety problem of lithium battery caused by high temperature and diaphragm rupture after collision can be effectively solved.
The over-temperature alarm function of battery pack added in the newly revised group standard requires that when the internal temperature of battery pack or the temperature of a battery reaches 80℃, the vehicle or battery pack should give an alarm sound within 30 seconds, which is of positive significance to the safe use of electric bicycle users. The newly revised group standard also improves the requirements for the stability of batteries (monomers), improves the safety performance index of lithium battery packs, and effectively prevents the risk of fire and explosion accidents of lithium batteries.
It is reported that Beijing implements a product catalogue system for electric bicycles. The Municipal Market Supervision Bureau said that after the implementation of the newly revised group standards, the original group standards will be abolished at the same time. The over-temperature alarm function of battery management system (BMS), mutual recognition and cooperation function between battery and vehicle, battery (monomer) needling and battery handle strength and other new technical indicators related to safety will be included in the catalogue of electric bicycle products, which will further enhance the safety of selling lithium-ion batteries for electric bicycles in this city.