A battery charging control method based on mppt control

Abstract

The invention discloses a storage battery charging control method based on MPPT (Maximum Power Point Tracking) control. The storage battery charging control method comprises the steps that a central control unit is used for judging the charging state of a storage battery by acquiring the voltage of the storage battery; the central control unit is used for selecting one of a MPPT control loop, an electric current control loop and a voltage control loop in a charge controller to calculate so as to obtain a charging control result at different charging states; the central control unit is used for transmitting PWM (Pulse-Width Modulation) signals with corresponding duty ratios at different charging states according to the charging control result of the charge controller, and the charging currents or the charging voltages at different charging stages are adjusted through a DC-DC (direct current-direct current) converter so as to realize the charging of the storage battery. The storage battery charging control method has the advantages that the charging intelligence is realized, the prolonging of the service life of the storage battery is facilitated, the central control unit is provided with various peripherals and has rapid data processing capacity, and peripheral devices of hardware are greatly reduced, and thus the structure of a charging control circuit is simplified, and the lowering of the control difficulty and the realization cost is facilitated.

Description

technical field [0001] The invention relates to battery charging technology, in particular to a battery charging control method based on MPPT control. Background technique [0002] As an important part of clean energy power generation, photovoltaic power generation has shown a vigorous development trend in recent years. Due to the characteristics of the working principle of solar cells - under the external environment (temperature, sunshine, angle, etc.) of the system, different array output voltages can obtain different output powers. Maximum Power Tracking (MPPT, MaximumPowerPointTracking) control. [0003] When charging a battery, people always want to charge it quickly without damaging the battery. The existing charging control methods for storage batteries are mainly divided into voltage loop charging and current loop charging, both of which may damage the storage battery to some extent. Contents of the invention [0004] Aiming at the deficiencies in the prior art...

AI Technical Summary

Problems solved by technology

The existing charging control methods for batteries are mainly divided into voltage loop charging and current loop charging. These two methods may damage the battery to some extent.

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