Monomer voltage polling module of super capacitor bank

Abstract

The invention relates to an independent voltage patrol inspecting module of a super capacitor group, which comprises a wire connecting terminal that is used for connecting the super capacitor group, a plurality of analog switches that are supplied with power by the super capacitor group, an operational amplifier, an A / D converter, a single chip and a bus communication module. The independent input and output ends of a plurality of the analog switches are connected with the wire connecting terminal, all the common input and output ends of the analog switches are connected with the input end ofthe operational amplifier, the output end of the operational amplifier is connected with the input end of the A / D converter, the output end of the A / D converter is connected with the bus communication module by the singlechip, and a digital I / O port of the singlechip is connected with a control pin of the analog switches. Compared with the prior art, the independent voltage patrol inspecting module of the super capacitor group has high precision, small volume, long service life, ultra-low power consumption and wide application range.

Description

Supercapacitor bank monomer voltage inspection module technical field The invention relates to a single voltage inspection technology of a supercapacitor bank, in particular to a supercapacitor bank monomer voltage inspection module. Background technique At present, the inspection methods for the supercapacitor bank monomer voltage can be roughly divided into two categories: the method of resistive voltage division and the measurement method of using relays to realize floating. The method of resistive voltage division: adjust the voltage of the entire supercapacitor bank to the acceptable voltage range of the A / D converter through the voltage dividing resistor, and then perform the measurement through the A / D conversion. Taking this method, on the one hand, because the precision of the resistance cannot be made very high, even if a higher precision can be achieved through channel-by-channel calibration, but in mass production, because the calibration process is too cumber...

AI Technical Summary

Problems solved by technology

Taking this method, on the one hand, because the precision of the resistance cannot be made very high, even if a higher precision can be achieved through channel-by-channel calibration, but in mass production, because the calibration process is too cumbersome, the accuracy is difficult to guarantee. The accuracy of the inspection system will be affected by this. On the other hand, the voltage dividing resistor will consume the energy of the supercapacitor bank to a certain extent, increasing the power consumption of the test system

Using relays to realize floating measurement methods: Whether it is a traditional mechanical relay or a more popular solid-state relay, the switching time is longer, which affects the inspection speed

The number of mechanical relay switches is limited, which affects the life of the entire inspection system

In addition, the volume of the relay is usually large, it is difficult to make the volume of the inspection system small

The current inspection methods generally require an independent power supply from an external power supply, but since each supercapacitor bank has a different test location, it is necessary to install an isolated power module on each test unit, so that as the voltage of the entire supercapacitor energy storage system increases High, the higher the isolation voltage performance requirements of the power module, which brings a lot of inconvenience to the application of supercapacitor energy storage systems, and in some special occasions where external power cannot be provided, these inspection methods cannot be used at all

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