车速超25公里断电，电动自行车新国标明起实施

Core Points - The new national standard for electric bicycles, GB 17761-2024, will be implemented on September 1, 2024, focusing on safety and performance enhancements [1][2] - The standard mandates that electric bicycles must automatically cut off power if the speed exceeds 25 km/h, addressing concerns about unauthorized speed modifications [1] - The new regulations aim to reduce fire risks by limiting the total mass of non-metal materials and enhancing braking performance [1][2] Group 1: Key Features of the New Standard - The new standard increases the weight limit for electric bicycles using lead-acid batteries from 55 kg to 63 kg to improve battery life [1] - It introduces requirements for the quality assurance capabilities of manufacturers and product consistency [2] - Electric bicycles must now include BeiDou positioning and communication features for real-time location and speed tracking [2] Group 2: Implementation Timeline and Consumer Guidance - All newly produced electric bicycles must comply with the new standard by September 1, 2025, with a three-month sales transition period for vehicles produced under the old standard [2] - Consumers are advised to check for CCC certification and product quality certificates when purchasing electric bicycles to ensure compliance with national standards [3][4] - Existing electric bicycles that do not meet the new standards will not be forcibly eliminated but may be updated through local government policies [2]