Correct charging and maintenance of lithium polymer batteries

Lithium polymer battery how rechargeable

Lithium polymer battery of high energy, small, lightweight, battery is a chemically. The following small series will introduce you to the correct lithium polymer 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 transferred to the constant voltage (CV) charge phase. In the constant voltage phase, there is a turbulent charging, which takes about 30% of the time to charge 10% of the electricity, 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. In the same way, during discharge, there is an overdischarged battery in the group. Overcharge and overdischarge are fatal to the battery. The only difference is that overcharge produces a large amount of gas, is liable to spontaneous combustion and explosion, and the appearance is severe; over discharge 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 separately 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 especially suitable for high current discharge. Our company has developed PCB balance protection for up to 20 series of series lithium batteries, with a maximum discharge current of up to 100A.

Therefore, when a lithium battery, be sure to use a dedicated lithium battery charger, particularly to be noted that the electrical parameters used to core support, to be consistent, when lithium batteries when used in combination, plus a battery pack must give The PCB protection board can avoid the electric core package, leakage, and even fire and explosion, and prolong the service life of the battery as long as possible, but it can not be charged and increase the number of cycles of the battery.

Lithium polymer battery maintenance method

As a new battery product that has been innovated after lithium-ion batteries , lithium polymer batteries have some caveats in their use. The following small series will introduce you to the maintenance method of lithium polymer battery.

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 3.6V400 mAh in a thickness of 0.5 mm, and the lithium polymer battery is 10% higher than the 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, there will be a new Santana that 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).

The above is an introduction to the maintenance method of lithium polymer batteries. In addition, if you want to maintain the power of the lithium polymer battery, it is best to discharge it completely every month and then refill it once, which helps the battery to maintain power and longer life.