PSoC (Programmable System on Chip)-based MPPT (Maximum Power Point Tracking) type solar charge controller

Abstract

The invention discloses a PSoC (Programmable System on Chip)-based MPPT (Maximum Power Point Tracking) type solar charge controller, which is provided with a solar cell, a storage cell, a fuse, a power conversion circuit, a PWM (Pulse Width Modulation) driving circuit, a PSoC central processing unit, a charging loop, a load power driving circuit, a load power output control circuit, a solar cell voltage sampling circuit, a charging current sampling circuit, a storage cell voltage sampling circuit, a load current sampling circuit, a lightning protection circuit, an anti-backflow circuit, a temperature sensor, a control key array and an acoustic-optic display alarm circuit. According to the solar charge controller, the PWM charging mode is adopted, the maximum power point tracking (MPPT) technology is applied, and the voltage of a working point of the solar cell is intelligently adjusted, so that the solar cell works in the maximum power output state; and the solar cell is intelligently controlled to charge the storage cell, and power is provided for a direct current load.

Description

technical field [0001] The invention relates to the technology of a solar charge controller, in particular to a PSoC-based MPPT solar charge controller. Background technique [0002] Solar energy has excellent characteristics such as environmental protection and no pollution, and has become the direction of energy development in modern society. In solar technology, one of the most important technologies is the solar charge controller. [0003] In the prior art, there are many solar charge controllers on the market, but they all have some shortcomings. Some simple solar charge controllers short-circuit the positive and negative poles of the solar panel to protect the battery after the battery is fully charged, which will As a result, the junction temperature of the solar panel array is too high, which can easily damage the solar panel and reduce the service life of the solar panel. Some solar charge controllers do not have the maximum power tracking (MPPT) function of solar...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there are many solar charge controllers on the market, but they all have some shortcomings. Some simple solar charge controllers short-circuit the positive and negative poles of the solar panel to protect the battery after the battery is fully charged, which will The temperature of the solar panel array is too high, which will easily damage the solar panel and reduce the service life of the solar panel

Some solar charge controllers do not have the maximum power tracking (MPPT) function of solar cells, resulting in the ineffective improvement of the energy conversion efficiency (power generation) of solar cells.

There are also solar charge controllers that are composed of microcontrollers and peripheral discrete components, resulting in a complex system circuit structure. At the same time, the signal conditioning circuit is implemented by peripheral discrete circuits, and the discrete components have poor consistency and temperature drift. Large and other shortcomings

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