In the application of solar street lamp
, attention should be paid to the control of the overcharge and overdischarge of the storage battery, and the discharge circuit should be disconnected in time when the storage battery is in the overdischarge state, this is done to protect the battery and prolong its service life.
The judgment of overcharge and overdischarge is based on the variation of the battery voltage: when the sun shines on the sunny day, the solar photovoltaic panel absorbs the light energy and charges the battery through the normally closed point of the relay switch, when the voltage of the battery is higher than 26 V, the battery is overcharged and the normally closed point of the relay switch is turned off.
At night, the battery supplies power to the street lamp. When the voltage of the battery is lower than 22 V, the battery is in the over-discharge state, the relay switch is turned from the normally closed point to the normally open point, and the discharge circuit of the solar street lamp is automatically disconnected, stop to load (Street lamp)Power supply, realize over-discharge protection function.
First, the battery should be prevented from overdischarge. The discharge depth of the battery is closely related to the number of charge and discharge cycles designed by the battery. If the discharge depth is 10%, the number of cycles is 10000, when the discharge depth is 70%, the number of cycles is only 500;
In order to prevent the battery from over-discharging, an extra BMS system should be installed in the battery so as to adjust the voltage of the battery.
Second: over-discharge protection test solar traffic signal lamp manufacturers use DC adjustable power supply instead of storage battery to supply power to solar power supply signal lamp and adjust the output voltage of DC power supply.
Three: system voltage overpressure, check whether the battery is open, or whether the battery is connected reliably.
Three: the outer packaging of the battery must be tight enough to guard against rainwater.
Four: solar street lamp manufacturers overcharge protection test solar traffic signal lamp manufacturers place solar power supply signal lamps in the sunshine of sunny days to charge, and connect current detection in series in the charging circuit, test the battery voltage at the end of charging with a DC meter.
Five: FP professional building materials coating is the main one, which can meet customers' requirements for the Coordination of product surface color and environment. At the same time, the product has high self-cleaning, strong corrosion resistance and aging resistance, and is suitable for any climate environment.
The performance of the product has been greatly improved, reaching the strictest AAMA2605.
2005 requirements, other indicators have reached or exceeded the relevant requirements of GB.
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