Battery pack online discharge maintenance device and method

Abstract

The invention provides a battery pack online discharge maintenance device and a method, and relates to the technical field of the DC power supply. The device comprises a system monitor, a charger, a battery inspection instrument, a switch and a active inverter module. The switch is connected to the DC port of the active inverter module and the battery pack respectively. The AC port of the active inverter module is connected to an AC network. When the battery pack meets the online discharge maintenance condition, the system monitor issues an instruction to discharge and maintain the battery pack; when receiving the instruction, the charger controls the output voltage to be lower than the terminal voltage of the battery pack, the switch is closed, and the active inverter module is turned onto discharge the battery pack to the AC network and the DC bus. Automatic online maintenance for the battery pack is realized, the cost is greatly reduced. At the same time, the discharge energy whenthe battery is discharged is fed back to the AC network, so that energy conservation and environment protection are achieved.

Description

technical field [0001] The invention relates to the technical field of direct current power supplies, in particular to an on-line discharge maintenance device and method for storage battery packs. Background technique [0002] The normal operation of the power system is an important guarantee for industrial production and residents' lives. For some important electrical equipment, even a short-term power failure may cause heavy losses. In the current power system, there are battery packs for energy storage equipment. When an accident occurs in the AC power supply of the power system and the AC power is cut off, the battery pack will act as a power output terminal to ensure the normal operation of the electrical equipment on the DC bus and avoid accidents. Expansion of influence. Therefore, the reliable operation of the battery pack is an important guarantee for the reliable operation of the power system. In view of the importance of the battery pack, in order to ensure the ...

AI Technical Summary

Problems solved by technology

This discharge maintenance method generally requires on-site manual operation by professional maintenance personnel. During the discharge maintenance process, professional operators need to follow the whole process, and the time for each group of battery discharge maintenance is about 10 to 20 hours. The number of battery groups used in the power system is huge. , so a large number of professional operators are required, and the labor cost is high

At the same time, the energy discharged by the battery discharge instrument is converted into heat energy consumption through the discharge instrument, resulting in a great waste of energy and poor energy conservation and environmental protection

[0004] For the problems of high maintenance cost and energy waste of battery packs in the prior art, no effective solution has been proposed so far

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