BEIJING, Beijing, June 19 (Xinhua) Today, the reporter learned from the Beijing Municipal Market Supervision Bureau that the revised Beijing electric bicycle group standard "Technical Specification for Lithium-ion Power Battery for Electric Bicycles" was officially implemented on June 19, and the original group standard was abolished at the same time. The newly revised group standard highlights the safety of products and further enhances the safety of lithium-ion batteries for electric bicycles sold in Beijing.
The standards were jointly revised by Beijing Bicycle and Electric Vehicle Industry Association, China Institute of Electronic Technology Standardization, Beijing Institute of Product Quality Supervision and Inspection, and other institutions and industrial enterprises. A total of 19 items were added and 20 related technical requirements were supplemented and improved.
The newly revised group standard highlights the safety of products. Based on the quality and safety management practice of electric bicycles in Beijing, the group standard first puts forward the requirements of mutual recognition and cooperative identification of battery and whole vehicle, battery (monomer) identification, acupuncture, thermal abuse, overdischarge and external short circuit, and takes the lead in applying the functions of mutual recognition and cooperative identification of battery and charging device, battery over-temperature alarm, increasing 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 the functions of BMS data uploading.
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 the battery pack added in the newly revised group standard requires that when the internal temperature of the battery pack or the temperature of a battery reaches 80 degrees, the vehicle or the 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.
Beijing implements the product catalogue system for electric bicycles. The Beijing Municipal Bureau of Market Supervision said that after the implementation of the newly revised group standard, the over-temperature alarm function of the battery management system (BMS), the mutual recognition and cooperation function between the battery and the whole vehicle, the battery (monomer) needling and the strength of the battery handle will all be included in the catalogue of electric bicycles, which will further enhance the safety of lithium-ion batteries for electric bicycles in Beijing.
