Self-adaptive solar charging controller

Abstract

The invention discloses a self-adapted solar energy charging controller, which is a controller using solar energy to discharge a storage battery. The controller comprises a storage battery voltage sampling circuit, temperature detecting circuit, a solar energy battery board sampling circuit, a control circuit that solar energy board charges the storage battery, a load controlling and protecting circuit. The charging is controlled by field effect tube IRL3803S, which has faster speed than the regular controllable electric switch and has a small conducting resistance. The single chip uses PWM storage battery charging mode, ensuring the reasonable state of the storage battery, enhancing using age of the storage battery; the digital signal outputted by the single chip is series-wounded to through and break of the field effect tube IRL3803S of outputting loop. When the storage battery is reversely connected, the safe will not be burned and any components of the controller will nit be damaged; the load current has protecting function for overload and short current. The controller has high efficiency, simple circuit, which can avoid high temperature fo the solar energy battery board array.

Description

technical field [0001] The invention relates to a solar charge controller, more precisely a controller for charging a storage battery with solar energy. Background technique [0002] Solar energy is an inexhaustible renewable energy that does not cause any pollution to the environment. It is both economical and environmentally friendly. Therefore, it has become the first choice for governments to develop new energy sources that are pollution-free and sustainable. At present, large and medium-sized cities in China use the power grid for power supply, which is expensive and wastes resources. Moreover, there are still many areas in China that are in a state of power shortage. These areas use scattered electricity and are far away from the grid. Living lighting in remote areas is relatively difficult, and the use of solar power generation technology is the best solution to this problem. [0003] At present, there are many solar controllers on the market, but there are the follo...

AI Technical Summary

Problems solved by technology

[0004] 1. In order to prolong the service life of the battery, it is necessary to control the charging of the battery. The existing solar controller short-circuits the solar panel after the battery is fully charged, which will cause the junction temperature of the solar panel array to be too high and damage the solar energy. solar panels

[0005] 2. The existing way of identifying day and night is to measure the open circuit voltage of the solar panel, but the conduction loss of the anti-reverse diode connected in series in the circuit generates a lot of heat

[0006] 3. The existing anti-reverse protection is that when the battery is reversed, the battery instantly forms a circuit and the fuse is blown, but it causes trouble in replacement

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