Common inspection and maintenance methods of solar street la
Solar street lamps are powered by crystalline silicon solar panels. Solar street lamp does not need to lay cables, AC power supply and electricity charge; it has the advantages of good stability, long life, high luminous efficiency, simple installation and maintenance, high safety performance, energy conservation and environmental protection, economic and practical.
Now, the application of solar street lamp is more and more extensive, so it is necessary to master some common detection and maintenance methods of solar street lamp:
1. Controller detection:
The controller's red light indicates that it is charging, the red light indicates that the battery is fully charged, and the controller is charging with a pulse of small current. Controller yellow light: it indicates that the battery has been damaged and cannot work normally. At this time, if the battery wire is disconnected and reconnected, the light will be on. This is the controller detects that the battery capacity is increased after a day's charging, not the floating impulse voltage of the battery (the pick-up voltage when the load is disconnected).
2. Solar panel testing:
If the connection of the solar panel is not very firm, it will lead to abnormal charging. The normal open circuit voltage is above 17.5V, but there is no current. This phenomenon is that the wires of the battery board are not connected properly (there is faulty welding or the connector is not firm at the welding position). The troubleshooting method can directly use the voltage and ammeter to detect the data after the black electrical cover behind the battery board is opened. If no current is detected directly from the aluminum foil of the battery board, it means that the battery board has problems and needs to be replaced.
3. Lithium battery test:
Under normal circumstances, the charging and discharging of lithium battery should be normal. For example, if the voltage is above 12V, when the lamp (load) is connected, the voltage will be reduced for a short time to indicate that the battery has been damaged. In addition, the water in the waterproof shell of the battery causes a short circuit between the positive and negative poles, and the correct voltage cannot be detected. Usually, it is one time high voltage, one time low voltage, and the battery is discharged too much due to the water inflow When the voltage drops below 10V, the battery can return to normal use after normal small current cycling charge and discharge. If it cannot be used normally, it needs to be replaced. After three years, due to the small drop in capacity, the lithium battery will turn off the lights in advance or reduce the time of rainy days every day, which is a normal phenomenon.
4. LED lamp detection:
LED light source can not work normally under normal battery voltage. If the light is not on, the positive and negative poles of the lamp can be directly connected to the positive and negative poles of the battery for detection. If the light source is on, it means that the lamp is good. The controller does not supply power to the load. The controller has problems. This phenomenon is that the battery voltage is not enough due to long rainy days. (the controller protects the battery The voltage is 11.3v-22.6v. As long as the battery is lower than the voltage, the controller will turn off the lamp forcibly.) after the lithium battery is fully charged here and the voltage rises to 12V (24V), the lamp can work normally. If the lamp is directly connected to the lithium battery, and the lamp is not on, it indicates that there is a problem with the lamp. This phenomenon reflects that there is a problem in adjusting the circuit control parts of the control lamps (high current, high voltage breakdown or parts falling off). In this case, the manufacturer should be contacted in time to replace them.