Charging control device, solar power generation system and charging control method

摘要

The present disclosure relates to a charging control device, a solar power generation system and a charging control method which allow more efficient charging. The charging control device includes: a charging converter which takes electric power out of a solar panel and converts the electric power to a voltage required for charging a storage battery; and a controlling CPU which adjusts an output voltage that is outputted from the charging converter. The charging converter takes electric power out of the solar panel at two operation points where the electric power can be taken out of the solar panel with a certain output voltage, and charges the storage battery. The controlling CPU adjusts the output voltage in accordance with a voltage difference between input voltages respectively corresponding to the two operation points. The present technique is applicable, for example, to the charging control device of the solar power generation system.

主权项

1. A charging control device, comprising:
a converter configured to take electric power out of an electric power generator that generates electric power, and configured to convert the electric power to a voltage required for charging a storage battery; and an adjuster configured to adjust an output voltage output from the converter, wherein the converter takes electric power out of the electric power generator at two operation points where the electric power can be taken out of the electric power generator with the output voltage adjusted by the adjuster and output from the converter, and charges the storage battery, wherein the two operation points are defined by intersection points between a voltage-current curve of the electric power generator and a curve defined by Ii=a/Vi and a =Vo×Io/η, where Ii is an input current input from the electric power generator into the convertor, Vi is an input voltage input from the electric power generator into the converter, Io is an output current of the converter, Vo is the output voltage that is output from the converter, and η is a conversion efficiency of the converter, wherein the converter determines the two operation points by scanning the input voltage, and wherein the adjuster adjusts the output voltage in accordance with a voltage difference between the input voltages respectively corresponding to the two operation points.