Online charging and discharging system for communication storage battery

Abstract

The invention relates to the field of communication storage battery management and discloses an online charging and discharging system for a communication storage battery. When the communication storage battery is charged or discharged online, the interior of a communication storage battery pack is subjected to online active balancing, and the situation is avoided that a single battery is overshotand over-discharged and cannot be completely charged. According to the online charging and discharging system, in the discharging process of the storage battery pack, a control system controls a switch network, a charger is in parallel connection with a single storage battery which is low in capacity in the storage battery pack, the discharging speed of the single storage battery which is low incapacity is lowered accordingly, and it is guaranteed that all the single batteries in the storage battery pack complete discharging at the same time; in the charging process of the storage battery pack, the control system controls the switch network, the electronic power load is in parallel connection with the single storage battery which is low in capacity in the storage battery pack, the charging speed of the single storage battery which is low in capacity is lowered accordingly, it is guaranteed that all the single batteries in the storage battery pack complete charging at the same time, and accordingly active balancing of online discharging is achieved. The online charging and discharging system is suitable for the communication storage battery pack.

Description

technical field [0001] The invention relates to the field of communication storage battery management, in particular to an online charging and discharging system for communication storage batteries. Background technique [0002] Communication power supply is an indispensable part of communication equipment, and its function is to supply power to communication equipment in a safe, stable, reliable and uninterrupted manner. In the communication power supply system, as an important part of ensuring the DC emergency power supply system, the battery pack is of great significance to ensure the normal operation of the communication system. [0003] The communication battery pack is generally composed of multiple single batteries in series, such as 24 2V or 8 6V or 4 12V. At present, there are many methods for using, maintaining and testing communication batteries, but in the process of using the battery , Due to the capacity of the battery pack, the use time (year), the consistenc...

AI Technical Summary

Problems solved by technology

[0004] Due to the difference in the capacity of each single battery in the battery pack, this difference will cause the single battery with a small capacity to be fully charged first when charging, and the battery that is fully charged first will have a larger resistance than other single batteries. In order to divide higher voltage, for example, a 48V battery pack composed of four 12V single batteries may appear that the first fully charged single battery is 15V, and the other three are 11V, 11V, and 11V, resulting in small capacity. The single battery will be overcharged and other batteries cannot be fully charged, which will affect the performance of the entire battery pack

Similarly, when the battery pack is discharged, when the same discharge current is used, the single battery with a small capacity will be discharged first. If all the batteries are discharged, the single battery with a small capacity will be over-discharged, which will affect the performance of the battery. Life and Performance

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