Switch network detection system and control method thereof

Abstract

The invention discloses a switch network detection system and a control method thereof. One embodiment of the switch network detection system includes a first voltage measurement device whose one endis connected with a negative electrode of a battery pack or a capacitor bank while whose other end is connected with a first output terminal directly or connected with the first output terminal through a switch; a second voltage measurement device whose one end is connected with the negative electrode of the battery pack or the capacitor bank while whose other end is connected with a second outputterminal directly or connected with the second output terminal through a switch; a processor connected with the first voltage measurement device and the second voltage measurement device and used forjudging whether voltage measured by the first voltage measurement device or voltage measured by the second voltage measurement device is in a preset range or not, and determining switch network abnormity if the voltage measured by the first voltage measurement device or the voltage measured by the second voltage measurement device is not in the preset range. The implementation method realizes detection of switch network faults. At the same time, the detection circuit is simple, the reliability is high and the anti-interference capability is high.

Description

technical field [0001] The present application relates to the field of electric power technology, and in particular to a switch network detection system and a control method for the switch network detection system. Background technique [0002] Battery packs or capacitor banks are widely used in communication backup power supply, electric vehicles, energy storage power stations and other fields. Switching networks are required for voltage measurement and equalization of battery or capacitor banks. Usually the switching network is connected to each cell or capacitor in the battery or capacitor bank. [0003] The detection of the existing switch network is mainly realized by connecting a detection circuit in series or parallel to each switch. However, since there are many single cells or capacitors in series in the battery pack or capacitor, for example, the battery pack of an electric bus can be connected in series up to hundreds of single cells, so when detecting whether e...

AI Technical Summary

Problems solved by technology

However, since there are many single cells or capacitors in series in the battery pack or capacitor, for example, the battery pack of an electric bus can be connected in series up to hundreds of single cells, so when detecting whether each internal switch of the switch network has an abnormal state, A large number of detection circuits are required, which greatly increases the volume, cost and complexity of the overall circuit, while greatly reducing the reliability and anti-interference ability

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