What factors affect the service life of Panasonic battery?
Many people are not particularly clear about the factors that affect the service life of Panasonic battery, so let's have a detailed introduction today!
After 1-4 years of normal operation, the capacity of Panasonic battery will not decrease so fast. Therefore, the main reason for the battery capacity reduction and service life reduction of the base station lies in the characteristics of the battery operation of the base station itself and the operation environment of the base station. From the query situation, when there is no doubt about the quality of the battery, the main reasons that affect the battery capacity of the base station to reduce too fast and the service life to shorten are as follows. At the top of the list, frequent blackouts, long blackouts and irregular blackouts at the base station make the battery charge and discharge frequently, which is one of the main reasons for Panasonic's battery capacity reduction and service life reduction.
According to the anatomy of the disused battery in the base station, the reason why the life of Panasonic battery stops is the sulfation of the negative plate of battery, which is a typical representation of PCL. The author thinks that there are two reasons for the sulfation of the negative plate of the battery:
(1) The outage frequency of the base station is too high. The outage occurs several times a day or even several consecutive days, which makes the battery of the base station discharge again when there is not enough power after discharge, and the battery is under charged. If the battery is under charged repeatedly, it will constitute a cumulative loss of battery capacity, then the battery capacity of the base station will be reduced in a short time, and its service life will be stopped quickly. The speed of the capacity reduction of Panasonic battery is directly proportional to the number of times that the battery of the base station is under charged. The reason for the reduction of battery capacity lies in that the battery discharges again when it is not sufficiently charged, and the positive and negative plates discharge again when the lead sulfate generated after the discharge fails to separate from the lead dioxide and lead metal, which causes the battery to undercharge and undercharge again and again, so that the negative plates gradually sulfate and have irreversible crystallization Lead sulfate, especially in the case of deep over discharge of battery, the sulfation of negative plate of battery will be more severe, the sulfation speed will be faster, the surface of negative plate will be shielded, its function will be gradually reduced until it fails, resulting in the reduction of battery service life until it stops. According to the analysis of the practical application of the battery in the existing base station, it is found that the accumulated under charge ability of the battery exists. In addition, although the battery is under charged for many times, there is no regular successive occurrence of the second under charge or the repeated under charge. The cumulative under charge ability and probability of the battery occurrence need to be further determined.
(2) Another point of view is that the main reason for the battery capacity and service life of the base station to be reduced is the sulfation of the negative plate of the battery. Besides the sulfation of the negative plate caused by the accumulated under charge of the battery, whether the addition of the number of charge and discharge cycles of the battery or the excessive frequency of charge and discharge cycles in a certain time will also cause the sulfation of the negative plate, or perhaps the sulfation of the negative plate An important element of transformation.
Of course, the sulfation edge of the negative plate of Panasonic battery is formed by many factors besides the above reasons, such as the overspending of electrolyte or glass fiber cotton impurities, which can accelerate the self discharge rate of the battery. Some lead sulfate crystals can not be dissolved because of the low floating charge or equilibrium voltage. It is often over discharged or low current deep discharged, which reduces the charging power of the battery in the early stage. The working temperature of the battery is too high, the impurity ions are more active, and the self discharge of the battery is accelerated.
According to the current battery manufacturer's planning, production process and technical level, the main reason for the sulfation of the battery negative plate of the base station is not the commodity quality, because under the normal operation of the battery, the sulfation time of the battery negative plate is long, and then the capacity of the battery storage tank is difficult to recover. From the analysis of other applications, different manufacturers, whether imported or domestic batteries, all have this question. Therefore, the main reason for the sulfation of the battery negative plate of the base station is the frequent power failure of the base station, frequent over discharge and deep over discharge of small current, which constitute the battery under charge and the frequent occurrence of under charge, which constitute the cumulative under charge of the battery, the excessive frequency of the base station charge and discharge cycles, and then constitute the irreversible sulfation of the negative plate. The sulfation of negative plates is the main reason that affects the battery capacity and service life of the base station.
Second, the setting parameters of the switching power supply are unreasonable. The undervoltage maintenance setting voltage of the base station battery is too low, and the reset voltage setting is too low, which makes the battery present the appearance of over discharge or deep over discharge. On the other hand, the sulfation of the negative plate of the battery is another main reason for reducing the capacity of Panasonic battery and shortening the service life.
At present, the base station combined switching power supply is set with low-voltage barrier maintenance function or secondary power down function. When the battery is discharged to a certain set voltage value, the switching power supply system will automatically cut off the power supply for some heavy load or full load, so as to maintain that the battery will not discharge and ensure the service life of the battery. If the minimum undervoltage maintenance value of the battery is set too low, the battery will be over discharged, and repeated over discharge and over discharge will severely affect the service life of the battery; otherwise, if the reset voltage of the switching power supply is set too low, the battery will be repeatedly discharged in the discharge process; The detailed battery minimum undervoltage maintenance value should be set according to the load current, while the current base station storage