On-line monitoring system for direct-current power supply and storage battery

The invention discloses an on-line monitoring system for a direct-current power supply and a storage battery, which comprises an on-line monitor, a monitoring centre, a user terminal, a monitoring network and a management network, wherein the on-line monitor consists of a CPU, a storage battery voltage and internal resistance test unit, a direct-current charger characteristic test unit, a power supply unit, a communication unit, an input-output unit, a fault alarm unit, a reset unit and a storage unity, monitors a field storage battery and the direct-current charger online and transmits monitoring data to the monitoring centre through the monitoring network; the monitoring centre is a large-scale server, which receives the monitoring data transmitted from the on-line monitor and performs storage management on the monitoring data in a large-scale database mode; the system responses various commands of the user terminal, and receives the commands of the user terminal to perform various controls on the on-line monitor installed on-site.