Solar photovoltaic power generation has become an important part of new energy and renewable energy, and is considered to be the most promising new energy technology in the world. At present solar photovoltaic development
Shen device has been widely used in dry communication, traffic, shen force and other aspects, its core part is

Charge controller.

Under the guidance of the overall scheme, the design uses low power consumption, high performance, super anti-interference STC89C52 microcontroller as the core device to control the whole circuit. The hardware circuit of the system consists of solar battery charging and discharging circuit, voltage acquisition and display circuit, MCU control circuit and RS232 serial communication circuit, which mainly realizes the acquisition and display of battery voltage. Part of the software based on PWM(Pulse Width Modulation) control strategy, programming to make the single chip microcomputer output PWM control signal, through the control of photoelectric coupler and then control MOSFET tube open and close, to control the battery charge and discharge purposes, At the same time according to the functional requirements to achieve the battery overcharge, overdischarge protection and short circuit protection. Experiments show that the
The controller has excellent performance and high reliability. It can monitor the solar panel and battery at any time

State, to control the optimal charge and discharge of the battery, to extend the service life of the battery.

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