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The times are constantly advancing, and technology is continuously developing, with many new types of energy being continuously developed for human society. In addition to wind energy, hydro energy, and gas combustion, solar energy, as a clean, pollution-free, and renewable natural resource, has garnered wide attention from scientists. Currently, there are various applications for solar energy, one of which is solar street lights. What are the charging methods for solar street light controllers? Below is an introduction from Century Sunshine Lighting.
1. Constant Current Charging Method
The constant current charging method involves adjusting the output voltage of the charging device or changing the resistance in series with the battery to keep the charging current constant. This control method is quite simple; however, due to the decreasing acceptable current capacity of the battery during charging, the charging current in the later stages is mainly used for electrolysis to produce gas, which may result in excessive gas production.
2. Constant Voltage Charging Method
In the constant voltage charging process, the voltage of the charging source remains constant throughout the charging time. As the terminal voltage of the battery increases gradually, the current decreases. Compared to the constant current charging method, this charging process is closer to optimal charging standards, resulting in minimal electrolysis and avoiding battery overcharging. However, a large current in the initial charging stage can significantly affect battery life and may cause the battery plates to bend, leading to failure.
3. Stage Charging Method
1-Stage Method: Charge with constant current until a predetermined voltage is reached, then switch to constant voltage to complete the remaining charging.
2-Stage and 3-Stage Charging Method: Use constant current charging at the beginning and end, with constant voltage charging in between. When the current decays to a predetermined value, it transitions from the second stage to the third stage. This method can minimize gas production, but as a rapid charging method, it still has certain limitations.
The above are the various charging methods for solar street light controllers. Solar controllers are divided into time control and light control. Half-power controllers are used in solar street lights and other lighting systems, as well as solar power generation systems, and can help prevent significant reduction in battery life due to overcharging and deep discharging. Furthermore, solar street lights, as a type of lighting product that does not require connection to electrical power, offer very high safety and reduce electrical hazards caused by severe weather conditions.
