Accumulator charging system

Abstract

The invention relates to an accumulator charging system, which comprises a three-phase alternating current power supply (10), an AC / DC convertor (20), a super capacitor group (30), a DC / DC bidirectional convertor (40) and an accumulator group (50), wherein the super capacitor group (30) is connected with the DC / DC bidirectional convertor (40) through a direct current bus (11). The DC / DC bidirectional convertor (40) is connected with the accumulator group (50)through an accumulator charging interface (102). The three-phase alternating current power supply (10) is connected with the AC / DC convertor (20) through an electric interface (101). The accumulator charging system can achieve conventional charging mode which comprises constant current, constant voltage and the like through controlling the DC / DC bidirectional convertor (40), can further generate positive and negative current impulse whose amplitude and width can be adjusted, achieves pulse charge to the accumulator group (50), provides particle or full electric energy by the super capacitor group (30) in a positive-going pulse period, absorbs electricity in a negative-going pulse period, lowers the charging grade of a charging power supply, and improves the energy utilization efficiency of the accumulator charging system.

Description

technical field [0001] The invention relates to a storage battery charging system, in particular to a pulse charging system capable of rapidly charging the storage battery. Background technique [0002] Since Gaston Plante, a Frenchman, discovered the phenomenon of lead-acid charging and discharging in 1859, lead-acid batteries have been the most widely used products in the field of batteries, such as automobiles, locomotives, ships, airplanes, and backup power supply equipment. Acid batteries, and still occupy a dominant position, have an irreplaceable position. Especially in recent years, in consideration of environmental pollution and energy security, electric vehicle technology and renewable energy power generation technology have developed rapidly; various batteries including lead-acid batteries, nickel-cadmium batteries, lithium-ion batteries, etc. As a power source or a backup power source, how to charge efficiently and quickly has become one of the main tasks of bat...

AI Technical Summary

Problems solved by technology

The DC / DC step-down converter in this patent is unidirectional and cannot use Reflex TM method charging

[0012] The battery charging system involved in the existing patent either adopts the constant current charging method or the constant current / constant voltage charging method, which not only takes a long time to charge, but also has low efficiency

Existing battery charging systems using pulse charging, or using unidirectional DC / DC cannot achieve Reflex TM charging method, or feed back to the grid through the large capacitor of the bus bar; the former reduces the efficiency, although the latter improves the efficiency, but increases the size of the entire system, and the energy directly fed back to the grid will cause harmonic pollution to the grid

Therefore, in view of the current conventional charging method of rechargeable batteries that takes a long time, and the fast charging method will cause pollution or low efficiency to the power grid, and in view of the fast energy storage characteristics of supercapacitors, this patent proposes the use of DC / DC bidirectional Converter and supercapacitor bank to achieve reflex of battery TM Charging methods to improve system efficiency, reduce power levels, and avoid pollution to the grid

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