This article describes the principles of the use and maintenance of lead-acid battery chemical power supplies for power systems based on a wide range of ambient temperature range, combined with the actual requirements of power systems for the monitoring and maintenance of lead-acid battery chemical power supplies Power supply reliability detection system. The system uses sensor technology and photoelectric coupling technology to collect lead-acid battery data, and determines the operating state of the battery pack by monitoring the battery pack’s single voltage, total voltage, charge and discharge current, and temperature, and innovates to achieve online balance The voltage between the battery and the battery is used to effectively maintain the operation of the battery pack, so that the operating state of the battery pack is easy to observe to minimize the possibility of accidents in the system, and the battery pack is well maintained, thereby increasing the service life of the battery pack, To achieve the purpose of saving resources and environmental protection.