What are the discharging operations of Panasonic batteries?
Panasonic battery depth discharge management system, timing automatic shutdown scheme. If the discharge time of Panasonic battery group exceeds the original design "full-load backup power supply time" due to the small discharge current after the power outage, the maximum discharge time allowed by UPS is three times as long as the original "backup power supply time" of Panasonic battery. When the discharge time reaches this moment, whether Panasonic battery pack has enough capacity to use, UPS will perform automatic shutdown operation to prevent Panasonic battery from entering the "deep discharge" working area due to too small discharge current. For example, if the backup time of Panasonic batteries is L5 min (with 100% load), no matter how light the actual load of the user is, as long as the downtime of the power supply exceeds 45 min, UPS will be automatically shut down (although Panasonic batteries still have a considerable amount of safe capacity to use at this time).
For UPS power mainframe, it is helpful to reduce the faults of the inverters. However, for the long-delay Panasonic batteries matched with UPS, the actual service life of Panasonic batteries will be 10 times shorter due to the "deep discharge" of Panasonic batteries. Therefore, in the process of using UPS power supply, Panasonic battery deep discharge should be avoided as far as possible.
What are the reasons for the discharging heat of Panasonic batteries? Today let's discuss together: discharging too fast, it may be Panasonic batteries have small capacity, discharge current longer than 0.5C. It is emphasized here that although the battery consumes a certain amount of electricity after a short journey, there is a recovery process after the battery is stationary, and the electrochemical process of the plate continues.
If the discharge is too fast, it may be that Panasonic battery has a small capacity and the discharge current exceeds 0.5C for a long time. It is emphasized here that after short-distance driving, although the battery consumes a certain amount of electricity, there is a recovery process after the battery is stationary, and the electrochemical process of the plate will continue, so the voltage will rise, but it does not mean the capacity will rise; on the contrary, when long-distance driving, the electrochemical effect of the plate and the consumption of electricity will go on simultaneously, which will have three situations. Now:
1. When the rated voltage of the motor is low, the capacity of Xili battery is small and the working current is large, the voltage will be reduced sharply, and the capacity will be consumed quickly, which is the most disadvantageous to the battery.
2. The electrochemical reaction speed of lead-acid batteries can only maintain the driving speed. The batteries have no chance to recover and breathe. They often charge and discharge in the whole cycle. If they are neglected, they will be over-consumed. When facing windward uphill, the power consumption is very high, which forces the battery plate to react rapidly. The heat of the battery shell is high, which will damage the battery, shorten its life, and show that the capacity is not surplus.
3. Ideally, the electrochemical reaction rate of the battery can supply enough electric energy calmly. The shell of the battery has no abnormal heat, indicating that the capacity of the battery is redundant.
Only the last of the three is ideal for long distance driving. It should be noted that the shell of the battery is obviously heated, and the internal battery itself is much hotter.
What are the causes of battery charging heating?
In the charging process of lead-acid batteries, part of the electric energy is converted to chemical energy, and part of the energy is converted to thermal energy and other energy. The heating of rechargeable batteries is a normal phenomenon, but when the temperature is high, it is necessary to check whether the charging current is too large or whether the short circuit occurs inside the batteries.
The relationship between calorific value and the amount of electrolyte is small. If the internal resistance of sealed battery increases when the amount of electrolyte is small, the temperature of battery will rise and the terminal voltage will be high when charging. Aging of batteries, drying up of electrolyte and short circuit inside also cause fever. Charger can not be constant voltage in the later period of charging, so that the battery voltage exceeds the allowable value, the temperature will rise, serious swelling, the end of life.
In use, try not to put it sideways or upside down to prevent a large amount of gas generated inside the battery from being discharged smoothly from the exhaust valve, especially when charging, otherwise it may cause the shell to burst.
What is the reason for the temperature rise of new lead-acid batteries after adding electrolyte?
After adding electrolyte to the new lead-acid batteries, the temperature rise is related to the internal factors of the new batteries. The temperature of dry-charged batteries increases after adding liquid, but the temperature of batteries is not very obvious. This is because the dry-charged electrode plate has been treated by oxidation, and the batteries that leave the factory are fully charged and can be loaded after adding liquid. The batteries with ordinary plates are semi-fully charged without oxidation treatment, and a considerable part of the materials are in the state of heat generated for the reaction of lead oxide and dilute sulfuric acid. So the temperature is very high. Sometimes in summer, the temperature is above 50 C, so manual cooling should be paid attention to when charging.