Storage battery online maintenance system

The utility model provides an on-line maintenance system for storage batteries, which comprises a plurality of storage battery packs which are connected through a network and are arranged at different regions and positions, and each storage battery pack is provided with a storage battery on-line maintenance instrument and a discharge load; a plurality of detection terminals of the storage battery online maintenance instrument are respectively connected with the positive electrode and the negative electrode of each storage battery of the storage battery pack; performing on-line monitoring and on-line maintenance on the storage battery pack according to the control instruction transmitted by the network; the storage battery on-line maintenance instrument receives a control instruction transmitted by a network and connects the discharge load with the storage battery pack through the storage battery discharge switching module so as to execute a nuclear capacitance discharge test on the storage battery pack or eac