How to troubleshoot solar street light battery short circuit fault?

Solar street light lead battery short circuit refers to the connection of the positive and negative groups in the lead battery. The short-circuit phenomenon of lead batteries in solar street lamps is mainly manifested in the following aspects:

1. The open circuit voltage is low, and the closed-circuit voltage (discharge) quickly reaches the terminal voltage.

2. When the high current is discharged, the terminal voltage rapidly drops to zero.

3. When charging, the temperature of the electrolyte rises very quickly.

4. The voltage rises slowly during charging, and always remains low (sometimes drops to zero).

5. When the circuit is open, the electrolyte density is very low, and the electrolyte will freeze at low temperature.

6. No bubbles or gas appears late when charging.

7. During charging, the density of the electrolyte rises slowly or almost unchanged.

The reasons for the short circuit of the lead-acid battery of the solar street light mainly include the following aspects:

1. The poor quality or defect of the separator allows the active material of the plate to pass through, resulting in virtual or direct contact between the positive and negative plates.

2. The positive and negative plates are connected due to the displacement of the separator.

3. Conductive objects fall into the battery, causing the positive and negative plates to connect.

4. The 'lead current' formed during the welding of the electrode group has not been eliminated, or there is a 'lead bean' between the positive and negative plates during assembly, and the separator is damaged during charging and discharging, resulting in the connection of the positive and negative plates.

5. The active material on the electrode plate expands and falls off, and the falling active material is deposited too much, so that the lower edge or side edge of the positive and negative electrode plate is in contact with the deposit, resulting in the connection between the positive and negative electrode plates.

Outdoor solar street light, semiconductor lighting, is a solid cold light source, with the characteristics of environmental protection, no pollution, low power consumption, high light efficiency and long life. Environmentally friendly solar street lights are crucial to energy saving in urban lighting.