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6 tips to extend the life of solar LED street lights battery

First, to prevent overcharging. The life and performance of a solar LED street lamp battery is closely related to the heat accumulation inside the battery. The heat source inside the battery is mainly caused by the power loss of the internal electrochemical reaction, and the product of the charging voltage and the charging current can be simply looked at. In the oxygen recombination reaction, the float charge flow is increased to generate more heat, and during constant voltage charging, the float charge flow increases with temperature, thereby further increasing the temperature. The thermal runaway phenomenon is a peculiar phenomenon caused by the structure of the valve-controlled sealed battery. Thermal runaway often causes serious hazards such as battery water loss, shell bulk belly, etc., and serious battery waste. To prevent overcharging, it is necessary to provide the charging voltage value strictly according to the manufacturer's instructions. Now the combined power supply can be set and intelligent management. It is necessary to pay attention to the first step, and the unauthorized personnel can not change it.

solar street light battery

Second, to prevent insufficient charging. Contrary to overcharging, the lack of charging is mainly caused by the charging voltage setting being too low or too low. Or there is a problem with the rack system.

Third, we must prevent over-discharge. The depth of discharge is closely related to the number of charge and discharge cycles (lifetime) of the battery design. For example, when the depth of discharge is 5%, the number of cycles is 10 000, and when the depth of discharge is 50%, the number of cycles is only 800. Excessive discharge will cause the battery to no longer be activated to the best state, or even scrapped. The discharge time and the termination voltage are different at different discharge rates, and the effective capacity released is also different and is affected by the ambient temperature. The relevant curves are no longer listed and drawn here, as given in the battery specifications of different manufacturers. Maintenance personnel should pay attention to it and set it in the monitoring unit in strict accordance with the relevant data, and should not be changed at will. Now the rack power supply manufacturer is designed with a battery power-off function, that is, when the solar street light battery is discharged to the set termination voltage, the battery discharge circuit is automatically cut off by the monitoring command. Some manufacturers have considered that the monitoring unit can not detect the battery termination voltage due to its operation (depending on its working power supply) or the device can forcibly cut off the circuit when the command cannot be issued. Therefore, maintenance personnel should pay attention to the reliability of these hardware circuits during inspection and inspection.

Fourth, control the ambient temperature. When the battery temperature rises, the electrolyte activity is intensified, the internal resistance of the battery is reduced, and the floating charge flow is increased, which causes the corrosion of the conductive element to be intensified and the life is reduced. Conversely, the electrolyte activity is weakened, the internal resistance of the battery is increased, and the battery is discharged to the load. The ability is weakened. Therefore, it is necessary to monitor and maintain the temperature of the solar street lamp battery and the ambient temperature. At the same time, the charging voltage must be temperature compensated to avoid overcharging at high temperatures and undercharging at low temperatures. In most places where VRLA battery packs are used, the ambient temperature is controlled at about 25 degrees. The accelerated life test shows that the ambient temperature rises by 10 degrees, and the charging voltage is not adjusted, and the solar street lamp battery life will be shortened by half.

Fifth , replace the faulty battery in time. Due to the process variation of each monomer, the long-term floating charge may gradually become 'backward', so there will be a management function of regularly charging the battery pack in the monitoring unit, in order to activate this backward monomer, so that it does not Behind. But often behind, it may eventually become a faulty battery. We can use a variety of methods to determine whether it has become ill, such as its capacity test alone, or online testing its internal resistance. The key is to replace the faulty battery in time, which is very important for the availability of the solar streetlight battery pack and even the entire life cycle.

Sixth, it is recommended to carry out the capacity test and discharge test of the battery pack regularly. The capacity test is for the physical examination of the battery pack. Of course, the workload is large, but considering the need and possibility, it is necessary to carry out the sampling test when conditions are recommended.

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