Solar charge controller is divided into time control and light control and other control modes, solar controller is used in solar street lighting systems and solar power generation systems, control overcharged battery life led to significant reduction. The following are some common ways controllers charge batteries.

1, constant current charging method

Constant current charging method is to adjust the output voltage of the charge or change the battery series resistance, charge current intensity to maintain the same charging method, the control method is very simple, but the battery current capacity is acceptable with the charge down, So to the late charge, the charging current is used for electrolysis of water to produce gas, will make too much gas.

2, constant voltage charging method

The voltage of the charging power supply during the constant voltage charging maintains a certain value for the entire charging time, but the current gradually decreases as the voltage of the battery terminal increases. Compared with the constant current charging method, in other charging process will be closer to the best charging standards, this method of charging very little electrolytic water to avoid battery overcharge, but in the early charge, the current will be too large, it will battery The life of a great impact, and easy to make the battery plate bending, so that caused scrapped.

3, stage charging method

Stage method: first constant current charge to a predetermined voltage value, and then changed to a constant voltage to complete the remaining charge.Three stage charging method: constant current charging at the beginning and end of charging, and constant voltage charging in the middle. When the current decays to a predetermined value, the second phase transitions to the third phase. This method can minimize the amount of gas, but as a fast charging method is still subject to certain restrictions

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