In much the same way, industrial batteries are lead-acid batteries that are charged by alternating current. Solar energy also uses lead-acid batteries. Some solar panels use lithium batteries or nickel-metal hydride batteries with better performance, which are charged by sunlight. or AC.
Since the charging/discharging methods are different, the requirements of solar cells and ordinary lead-acid batteries are also different:
1. Charging: The power of solar cells comes from the sun, but it uses The current used by sunlight to charge the battery is very small, so the plate area is not needed;
2. Discharge: Solar cells typically power low-power electrical devices. Like street lights, the discharge current is also very small;
3. GivenAs the charging and discharging current is very small, thin plate technology is not required;
4. cells require long life and cycle times, so they are typically flooded batteries. Ordinary batteries are low in liquid.
The output voltage of the solar panel is higher during the day. The voltage divider by R1 and R2 causes VT1 to turn on, while VT2 turns off, the LED does not light up and the solar panel output is activated. charges the GB2 battery via VD1. At night, the output voltage of the solar panel is lower, causing VT1 to turn off, while VT2 turns on and GB2 turns on the LED.