Polymer lithium battery charging method
At present, lithium charging is mainly a voltage limiting current limiting method. The initial constant current (CC) charging has the strongest battery receiving capacity. As the charging process continues, the polarization is strengthened, the temperature rise is intensified, and the voltage rises. When the charging reaches about 70. At ~80%, the voltage reaches the maximum charge limit voltage and is switched to the constant voltage (CV) charge phase. In the constant voltage phase, there is a trickle charge, which takes about 30% of the time to charge 10% of the charge, the current intensity decreases, and the temperature rise does not increase.
This process considers the total voltage or average voltage control of the battery pack. In fact, there is always a higher cell voltage, and other batteries in the opposite group have entered the overcharge phase. Similarly, during discharge, there is an overdischarged battery in the group. Overcharge and overdischarge are fatal to the battery. The only difference is that overcharge generates a large amount of gas, is prone to spontaneous combustion and explosion, and the appearance is severe; The appearance changes slowly, but the failure speed is extremely fast, and should be strictly avoided in normal use.
In this regard, there is a new lithium battery charging method called parallel control and equalization management, which can charge and discharge management and equalization control for each power module. This dynamic equalization concentrates the two equalizations of discharge equalization and charge equalization. The advantage is that although the initial capacity, voltage, internal resistance and the like are different between the individual electric cores, the relative charge and discharge intensity and depth consistency can be ensured in the work, and the common end of life is gradually achieved. This method is particularly suitable for high current discharges.
Therefore, when charging the lithium battery, be sure to use a dedicated lithium battery charger, especially pay attention to the parameters of the battery used. It must be consistent. When the lithium battery is used in combination, it must be added to the battery pack. The protection board can avoid the battery pack, leakage, and even fire and explosion, and prolong the service life of the battery as much as possible, but it can not be charged and increase the number of cycles of battery use.
Lithium polymer battery maintenance method
As a new battery product that has been innovated after the lithium-ion battery, lithium polymer batteries have some points to be aware of in their use.
First of all, it is a feature of lithium polymer batteries. Compared with lithium-ion batteries, lithium polymer batteries have improved the problem of battery leakage, but they have not been completely improved. In addition, the lithium polymer battery can be made into an ultra-thin battery, which can reach a capacity of 3.6V at 400 mAh in a thickness of 0.5 mm, and a lithium polymer battery is 10% higher than a conventional lithium ion battery in terms of discharge amount.
In daily use, as a kind of lithium ion battery, lithium polymer batteries are also often afraid of short, external short and overcharged inside the battery. 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. When the temperature is too high, it may explode.
Therefore, when using the battery, try not to overcharge and discharge, that is, use the battery smoothly and in a planned manner, do not let the battery run out easily, and do not charge for a long time (usually 8 Within hours is the most appropriate).