Analysis of charging and maintenance methods for polymer lithium batteries

Lithium polymer battery charging method Currently, the most important method of lithium charging is the voltage limiting and current limiting method. The initial constant current (CC) charging has the strongest battery acceptance. As the charging process continues, the polarization application is strengthened, the temperature rise is intensified, and the voltage rises. When the charge reaches about 70~80%, the voltage reaches the maximum charge limit voltage, and the constant voltage (CV) charge phase is transferred. In the constant voltage stage, there is a trickle charge, which takes about 30% of the time to charge 10% of the electricity, the current intensity is reduced, and the temperature rise is no longer added. This process considers the total voltage or uniform voltage control of the battery pack. In fact, there are always those with higher cell voltages, which have entered the overcharge stage relative to other batteries in the group. In the same way, when discharging, there are over-discharged batteries in the group. Over-charging and over-discharging are fatal to the battery. The difference is that a lot of gas is generated during over-charging, spontaneous combustion and explosion are easy to occur, and the appearance is violent; The appearance changes slowly, but the failure rate is extremely fast, and it should be strictly prevented in normal use. In this regard, there is a new lithium battery charging method called parallel control and balanced management, which can charge and discharge each battery core separately, and balance the control. This dynamic balance combines two types of balance, discharge balance and charge balance. The strengths of the battery, despite the differences in the initial capacity, voltage, internal resistance, etc. between the single cells, it can ensure the consistency of the relative charge and discharge intensity and depth during work, and gradually reach the common end of life. This method is particularly suitable for high current discharge. Therefore, when charging the lithium battery, you must use a dedicated lithium battery charger, especially pay attention to the parameters of the battery used, to be consistent, when the lithium battery pack is used, it must be added to the battery pack. The PCB protection board can prevent battery packs, leakage, fire and explosion, and extend the service life of the battery as much as possible. However, the battery cannot be charged and the number of cycles is increased. The maintenance method of lithium polymer battery is a new battery product obtained after the innovation of lithium battery. There are some points to pay attention to in the use of lithium polymer battery. First of all, it is the characteristics of lithium polymer batteries. Compared with lithium batteries, lithium polymer batteries have improved the problem of battery leakage, but they have not completely improved. In addition, the lithium polymer battery can be made into an ultra-thin battery. The thickness of 0.5mm can reach the capacity of 3.6V400 mAh, and the discharge capacity of the lithium polymer battery is 10% higher than that of the traditional lithium battery. In daily use, as a kind of lithium battery, lithium polymer battery is often afraid of short internal battery, short external battery, and overcharge. The reason is because the chemical nature of lithium is very active. When the battery is discharged and charged, the inside of the battery will continue to heat up, and when the temperature is too high, it may explode. Disclaimer: The articles published on this website are all from the Internet. If there is any infringement, please contact to delete it. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.