Series battery pack capacity on-line monitoring and charging and discharging dual-state equalization circuit and method

Abstract

The invention provides a series battery pack capacity on-line monitoring and charging and discharging dual-state equalization circuit and method. The series battery pack capacity on-line monitoring and charging and discharging dual-state equalization circuit includes a storage battery pack, a gating switch array, a power dissipation loop, a polarity matching switch array, an isolation DC / DC converter, a bipolar differential voltage measurement circuit, a microcontroller unit, a charging and discharging current detection loop and a switch circuit unit. According to the series battery pack capacity on-line monitoring and charging and discharging dual-state equalization circuit and method, by controlling the gating switch array to separately charge and discharge each series section battery ofthe storage battery pack, the voltage of each series section battery is measured in real time, the discharge current and discharge quantity are calculated, the on-line detection of the storage battery pack capacity is realized, the bypass discharge and parallel supplement can be carried out on the series section batteries with high or low relative charge in the two states of charging and discharging.

Description

technical field [0001] The present disclosure relates to the technical field of storage batteries, in particular to a circuit and method for on-line capacity monitoring of series battery packs and dual-state equalization of charging and discharging. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] With the continuous deterioration of the global environment, reducing various harmful emissions has become a major issue faced by all mankind. As the most convenient electric energy storage device, various large-capacity battery packs are widely used in backup power devices for various applications such as security monitoring and communication facilities, as well as new energy vehicles such as electric vehicles, electric boats, and unmanned aircraft. In order to meet the needs of the application system for battery capacity and voltage, it is ne...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the measurement accuracy is poor, it is easily affected by the environment and other factors, and the evaluation result has a large error, which cannot guarantee the reliability of the application system.

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