Equalizer circuit for backup power supply

Abstract

The present invention provides a voltage equalizing circuit for spare power source, the spare power source includes n power supply monomers which are connected with each other in series; the equalizer circuit includes a sampling resistance Rs, an input switch circuit, a transformer T1 and n output rectification filter circuits; the input switch circuit is connected with the original edge of the transformer T1 in parallel and then connected with the two ends of the spare power source by the sampling resistance Rs; the auxiliary edge of the transformer T1 has n voltage reduction output ends, the output voltage of each voltage reduction output end is completely identical and coupled tightly; each rectification filter circuit is connected with one voltage reduction output end, each rectification filter circuit and the input switch circuit form the single end backlash; each rectification filter circuit is respectively connected with each power supply monomer in parallel. The present invention not only can prevent the series power supply monomer from the unbalancing for the voltage, but also can sufficiently use the capacity of each power supply monomer, and simultaneously reduce the consumption caused by the equal voltage.

Description

technical field [0001] The invention relates to a backup power supply, which is mainly designed for accumulators or supercapacitors, especially series accumulators or supercapacitors. Background technique [0002] A large number of DC power supplies or uninterruptible power supplies are used in the fields of communication, electric power, finance, insurance, etc., and these power supplies use battery packs as backup power supplies. Because these voltages are relatively high, a group of batteries are usually used in series. Usually, 24 2V batteries are connected in series, and 104 2V batteries are usually connected in series for electric DC power supply. With the development of supercapacitor technology, its application is becoming more and more extensive, especially in electric vehicles. However, the withstand voltage of large-capacity supercapacitors is only about 1.6V. For applications with relatively high voltage requirements, it usually takes dozens of Even hundreds of ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of poor applicability and large loss caused by voltage equalization of the existing backup power supply voltage equalization circuit, the present invention provides a circuit that can prevent the voltage imbalance of the battery pack or super capacitor group in series and make full use of the battery pack. The capacity of the bank or super capacitor bank, and the voltage equalizing circuit of the backup power supply that reduces the loss caused by voltage equalization

Images