Correct use and maintenance of Corstal batteries.
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Correct use and maintenance of Corstal batteries.

Correct use and maintenance of Corstal batteries.

Learn more about the use of Corstal lead-acid batteries, hope you can better maintain Corstal lead-acid batteries in the future.


Inspection and Maintenance of Corstal Batteries

Keshida battery maintenance is indispensable. Whether it is manual operation maintenance or automatic monitoring management, it is to detect abnormal faults of individual batteries or equipment system faults affecting battery charging and discharging performance in time, and actively take corrective measures to ensure stable and reliable operation of power supply system. Battery inspection and maintenance is divided into daily maintenance, quarterly maintenance and annual maintenance.

I. Daily Maintenance

1. Make sure the surface of the battery is clean and dry.

2. Always pay attention to the changes of environment temperature and appearance of battery system.

3. Check the on-line floating charge voltage of the battery and the floating charge voltage of the battery group (total terminal voltage) regularly, and compare it with the panel display, and correct it if necessary.

4. Ensure that the battery cabinet or battery room is clean, well ventilated or illuminated.


Second, quarterly maintenance

1. Visual inspection of the cleanliness of the outer surface of the battery, the perfection of the shell and cover, the appearance of the battery with or without drum deformation, and whether the battery has overheating marks;

2. Measure and record the ambient temperature of the battery system and the average temperature of the system at the unified detection point of the battery system every quarter. When the temperature is below or above 25 C, the temperature control system should be adjusted. If the temperature control system is not installed, the floating charge voltage should be adjusted.

3. Measure and record the total floating charge voltage at the battery end, and compare it with the display value of panel meter. If there is any difference, find out the reason and correct it in time.

4. Measure and record the floating charge voltage of each battery in the system. Normally, it should fluctuate within a certain range. If abnormal is found, find out the cause and correct it.

5. Make restorative discharge test. Discharge with false load or actual load, that is, cut off the power supply and supply with battery. If it is found that the capacity of individual batteries is on the low side, the batteries should be charged equally, but the capacity can not be restored after equalized charging, the batteries with too low capacity should be replaced.


Annual Maintenance

1. Repeat quarterly maintenance of all content;

2. Check the connection points between all batteries and ensure that the connection is firm and reliable.

3. Select several batteries randomly for internal resistance test. Because of the wireless relationship between the internal resistance and its capacity, the internal resistance of batteries can not be used to directly express the accurate capacity of batteries, but the internal resistance of batteries can be used as an indicator of the "healthy" status of batteries.


Several Factors Affecting the Life of Batteries


1. Deep discharge

The depth of discharge has a great influence on the cycle life of the battery. If the battery is discharged deeply, the cycle life will be shortened. Because deep discharge of batteries with the same rated capacity means that they are often charged and discharged with high current, and can not be recharged in time when they are discharged with high current or under-voltage, resulting in large sulfate particles, inadequate utilization of active materials on the plates, and the actual capacity of batteries will gradually decrease over a long period of time, affecting the normal operation of batteries. Because the solar photovoltaic power generation system is not easy to overcharge, the main reason for the battery failure and life shortening in the solar photovoltaic system is the long-term power deficit.


2. Discharge rate

It is generally stipulated that the capacity of 20-hour discharge rate is the rated capacity of storage battery. If the discharge rate is lower than the prescribed hour, the battery capacity can be higher than the rated value; if the discharge rate is higher than the prescribed hour, the discharge capacity is smaller than the rated capacity of the battery, and the discharge rate also affects the terminal voltage value of the battery. When the battery discharges, the electrochemical reaction current preferentially distributes on the surface nearest to the main solution, resulting in the formation of lead sulfate on the surface of the electrode and blocking the porous electrode.


When the discharge current is high, the above problems become more prominent, so the larger the discharge current, the smaller the capacity of the battery, and the faster the drop of terminal voltage, that is to say, the discharge termination voltage decreases with the increase of discharge current. On the other hand, the lower the discharge rate, the better. Some studies have shown that long-term too small discharge rate will significantly increase the amount of lead sulfate molecule, resulting in plate bending and active material shedding, and also reduce the life of the battery.


3. External temperature is too high

The rated capacity of batteries refers to the value of batteries at 25 C. It is generally considered that the working temperature of VRLA batteries is ideal in the range of 20 30 C. When the temperature of the battery is too low, the capacity of the battery decreases, because the electrolyte can not react well with the active material of the plate at low temperature. Reduced capacity will not meet the expected backup time and keep within the prescribed discharge depth, which can easily lead to battery overdischarge. From the external parameters of the battery, the voltage has a great relationship with the temperature. The voltage drop of the single cell battery decreases by 3 mV every time the temperature rises by 1 C.


That is to say, the voltage of lead-acid batteries has a negative temperature coefficient, whose value is - 3mV /. In the same way, the increase of ambient temperature is easy to cause battery overdischarge. High temperature will also lead to the loss of water and thermal runaway phenomenon of storage batteries. Temperature is a major factor affecting the normal operation of storage battery. In solar photovoltaic system, the controller is generally required to have temperature compensation function.

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