T/SHJX 003-2021 Active

Main technical content: After several rounds of guidance and promotion of new energy policies at the national and local levels, new energy buses have become the mainstream mode of public transportation. To date, the number of new energy buses in the city has exceeded 10,000. The state has set the twin goals of "carbon neutrality" by 2030 and "carbon neutrality" by 2060. With the implementation of policies such as the "Blue Sky Defense War", it is expected that by 2025, the vast majority of new or updated buses in the city will be new energy buses. With the rapid development of new energy buses, how to ensure their safe operation through effective maintenance has become a priority. Through investigations and studies, industry associations have explored the maintenance requirements for supercapacitor bus charging systems, energy storage systems, and their operational characteristics, resulting in this maintenance process. It aims to guide bus repair units in maintenance operations and enhance vehicle safety. **Scope of application of this standard**: - Supercapacitor buses manufactured in accordance with the latest requirements of **DB31/T306 General Technical Requirements for Buses**. - Maintenance items: - High-voltage power and auxiliary systems on the bus, including but not limited to: supercapacitors, drive motors, controller assemblies, high-voltage wiring harnesses, related control circuits, electric air conditioners, electric compressors, electric assist steering pumps, defrosters, pantographs, etc. - Maintenance cycles: - Since 2015, the reliability and stability of vehicles produced after this year have been greatly improved compared to earlier models, primarily due to the introduction of integrated power systems and the promotion of maintenance-free chassis systems. Consequently, the maintenance cycles for various vehicle systems and assemblies have been integrated into four categories: - **Break-in maintenance**: - **Fi