Energy feed type variable-constant-current and positive-negative-pulse fast charging device and method

Abstract

The invention belongs to the technical field of electricity, relates to charging equipment and method, in particular to an energy feed type variable-constant-current and positive-negative-pulse fast charging device and method. The fast charging device is characterized in that alternating currents sequentially pass an air switch, an EMI filter circuit, a full-bridge rectifying and filter circuit and power factor correction circuit, the power factor correction circuit is respectively connected with a controller and a first voltage detecting circuit, the controller is respectively connected with a comparison and conditioning circuit and a first auxiliary power supply, a storage battery charging and discharging management main circuit is respectively connected with the first voltage detecting circuit and a second voltage detecting circuit, a current transformer is respectively connected with an output filter capacitor, the storage battery and a bias circuit, a second optical coupler is respectively connected with the second voltage detecting circuit and a single-chip microcomputer control circuit, the single-chip microcomputer control circuit is respectively connected with a second auxiliary power supply, a display circuit, a drive circuit and the bias circuit, and the display circuit is connected with the second auxiliary power supply. The energy feed type variable-constant-current and positive-negative-pulse fast charging device is simple in structure, convenient to operate, short in charging time and high in electric energy utilization rate.

Description

Technical field: [0001] The invention belongs to the technical field of electricity, and relates to a charging device and method, in particular to a positive and negative pulse fast charging device and method for energy-feeding variable constant current value of a storage battery. Background technique: [0002] The charging and discharging of the battery is a complex electrochemical process. There are many factors that affect the charging during the charging process. Among them, the polarization problem is more prominent, which will affect the charging acceptance of the battery and cause the charging speed of the battery to be slow. The traditional charging methods include constant current charging, constant voltage charging, staged charging, etc. These charging methods have no depolarization measures, which seriously affect the charging time, capacity and service life of the battery. The positive and negative pulse charging method is a new charging method studied in recent ...

AI Technical Summary

Problems solved by technology

However, the existing positive and negative pulse charging methods include constant current positive and negative pulses and variable constant current positive and negative pulses. The negative discharge pulses are generated by the parallel circuit discharge of the lead-acid battery to the resistor and the capacitor, and the energy in the capacitor is absorbed by the resistor. consumption, and finally dissipated into the surrounding environment in the form of heat energy, resulting in a waste of energy, and due to the use of resistance discharge, the discharge current cannot be adjusted, it can only increase with the increase of the battery terminal voltage, and can only pass through in the later stage of charging. Reduce the discharge time and reduce the discharge energy, resulting in a large instantaneous impact of the discharge current on the battery

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