On-line monitoring device of battery pack

The invention relates to the field of the storage battery technology, particular to an on-line monitoring device of a storage battery pack. The on-line monitoring device comprises a storage battery body provided with a box body matching the storage battery body. A box cover is installed at the upper end of the box body; two sealing tubes in contact with the inner cavity of the box body are installed at the box cover in a penetrating manner; and thermal conducting layers and temperature sensors are installed inside the sealing tubes. A monitoring unit is installed at the box cover and is connected with the temperature sensors electrically by wires; the monitoring unit consists of a single-chip microcomputer driver circuit, an AD module, a GPRS module and a memory module; the single-chip microcomputer driver circuit is connected with the GPRS module and the memory module electrically; and the temperature sensors are connected with the AD module and the single-chip microcomputer driver circuit electrically. The