We know that the main energy source of street lights solar power is solar energy, so it is the most environmentally friendly among street lights, because it illuminates the solar cells during the daytime, converts the light energy into electrical energy and stores it in a battery, and the battery is The LED (light emitting diode) of the street light provides power. What are the main protection modes of street lights solar power?
Mode one, direct charge protection point voltage for street lights solar power:
Direct charging, also called emergency charging, belongs to fast charging. Generally, when the battery voltage is low, the battery is charged with high current and relatively high voltage. However, there is a control point, also called a protection point. The voltage of the direct charge protection point is generally the "overcharge protection point" voltage. When charging, the battery terminal voltage cannot be higher than this protection point, otherwise it will cause overcharge and damage the battery.
Mode Two: Equal charge control point voltage for street lights solar power:
After the direct charging is completed, the battery is generally left for a period of time by the charge and discharge controller to allow its voltage to fall naturally. When it drops to the "recovery voltage" value, it will enter the uniform charging state. Uniform charge, that is, "equal charge". The average charging time should not be too long, generally several minutes to ten minutes. Setting the time too long is harmful. For small systems equipped with a two-cell battery, charging is not significant. and so. Solar street light controllers generally do not have uniform charging, and there are only two stages.
Mode three: Floating charge control point voltage:for solar street light philips:
Generally, after the charging is completed, the battery is also left for a period of time to allow its terminal voltage to fall naturally. When it falls to the maintenance voltage point, it enters the floating charge state. It is similar to low-current charging, and the battery voltage is charged as soon as it is low. On the last point, fill it with a low point, one by one, to prevent the battery temperature from rising continuously, which is very good for the battery.
Mode four, over-discharge protection termination voltage for solar street light philips:
The battery discharge cannot be lower than the national standard.Although battery manufacturers also have their own protection parameters, they still have to move closer to the national standard.
For the sake of safety, the voltage of the 12V battery over-discharge protection point is generally artificially added with 0.3v as a temperature compensation or zero drift correction of the control circuit. In this way, the voltage of the 12V battery over-discharge protection point is: 11.10v, then the 24V system's The protection point voltage is 22.20V.
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