Improved solar charging circuit with mppt controller structure

Abstract

The invention relates to an improved solar charging circuit with an mppt controller. The improved solar charging circuit comprises a main circuit unit, a single-chip microcomputer control unit and an isolation driving unit. The improved solar charging circuit is characterized in that the main circuit unit is composed of two charging loops through parallel connection. The single-chip microcomputer control unit has two paths of out-phase high-frequency pulse square wave output ends. The two paths of out-phase high-frequency pulse square wave output ends are connected with two signal input ends of the isolation driving unit so as to form two paths of high-frequency pulse square wave output structures of the isolation driving unit. The two driving output ends of the isolation driving unit are respectively connected with the control input end of one path of charging loop. The output ends of the two charging loops are connected in parallel to form the electrode of the charging signal output end of the main circuit unit for connecting a storage battery so as to form a multiphase parallel controller charging circuit structure. The single-chip microcomputer control unit performs mppt tracking on a solar panel according to the power generation data of the solar panel obtained through sampling so that output of the solar panel is enabled to be under the state of maximum power. The improved solar charging circuit with the mppt controller structure has the characteristics of low current ripple, low temperature rise of input and output capacitors and long service life of the capacitors.

Description

technical field [0001] The invention relates to a solar charging circuit, in particular to an improved solar charging circuit with an mppt controller. It belongs to the technical field of solar controllers. Background technique [0002] With the development of industry, the problems of energy depletion and environmental pollution are becoming more and more serious. Therefore, the development and utilization of new energy is particularly important, and solar energy has been gradually developed and utilized due to its advantages of cleanness, environmental protection and abundant reserves. Among them, photovoltaic power generation is rapidly popularized all over the world and has become the most promising new energy technology in the world. [0003] A traditional photovoltaic power generation system is mainly composed of a solar charger, a solar controller and a battery. The solar controllers in the prior art generally adopt the following two control technologies: [0004]...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of large ripples in the charging process of the existing solar charging circuit, serious loss of the capacitance of the battery or both ends, and power conversion capacity limited by circuit devices

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