New energy vehicles represent innovative advancements in clean energy application, offering a solution to the high energy consumption associated with traditional fuel-driven vehicles. These vehicles not only reduce energy consumption but also contribute to lower exhaust pollution, aligning with the goals of sustainable societal development. The burgeoning new energy vehicle industry holds promising prospects and vast potential, while it also ushers in fresh demands for automotive maintenance technology. This abstract explores the role of electronic diagnosis technology, particularly its application in diagnosing battery voltage faults, in supporting the development of the new energy vehicle industry. Leveraging electronic diagnosis technology, the fault diagnosis of battery voltage in new energy vehicles can be conducted using various electronic devices. This approach provides invaluable insights into the operational status of individual components and parts within the battery, enabling the timely detection of anomalies and the precise identification and resolution of faults. Automotive maintenance technology plays a pivotal role in expeditiously completing diagnosis and maintenance procedures, ensuring the seamless operation of new energy vehicles.