Photovoltaic pulse charge transfer charge controller and control method thereof

Abstract

The invention discloses a photovoltaic pulse charge transfer charge controller and a control method thereof. The photovoltaic pulse charge transfer charge controller comprises a charge storage, a switching tube K, a controller module and voltage detection devices at the charge end of the charge storage and the charge end of a storage battery, wherein the charge storage is in parallel connection with the photovoltaic battery, an electronic power switch K is in series connection with the storage battery and then is in parallel connection with the charge storage, and a controller sends out a control signal to a switch K by detecting voltages at the two ends of the electronic power switch K so as to solve the problems of efficiency and storage battery protection of an existing photovoltaic power generation storage battery charging technique. A circuit topology is only provided with one switching tube, no inductance components are included, and accordingly the controller has the advantages of being simple in structure, high in charging efficiency and capable of making full use of photovoltaic energy, effectively limiting charging temperature rise of the storage battery and prolonging the service life of the storage battery. Based on a pulse charging technique of charge transferring, the preceding problems can be solved, and efficient and lossless charging of a lead-acid battery can be achieved on various conditions.

Description

technical field [0001] The invention relates to the technical field of photovoltaic charging, in particular to a photovoltaic pulse charge transfer charging controller and a control method thereof. Background technique [0002] There are three main polarizations for battery charging, ohmic polarization, concentration polarization, and electrochemical polarization. According to the basic principle of electrochemistry, when the lead-acid battery is charged, before gas evolution occurs, its polarization is mainly electrochemical polarization and ion concentration polarization, and electrochemical polarization leads to the inability to evolve H 2 and Analysis O 2 , As a result of concentration polarization, the open circuit voltage of the battery increases, the temperature of the battery increases (more precisely, the temperature of the electrode), the charging efficiency is low, and the gas evolution reaction is prematurely entered. Generally speaking, as the current density ...

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Problems solved by technology

[0004] In the existing battery charging technology for photovoltaic power generation, the existing problems are: 1) The conventional charging time is long; 2) When charging with a large current, the battery concentration polarization is large, the battery temperature is high, and the battery is damaged; 3) The light intensity comparison When the battery is weak, it is difficult for the photovoltaic charger to effectively charge the battery

[0005] All in all, the traditional charging technology is difficult to adapt to the characteristics of photovoltaic power sources, and cannot simply and effectively remove the concentration polarization during battery charging to ensure that the temperature rise of the battery is small

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