From：CTECHI GROUP Limited Release time：2018-12-17
Overview：Here is the correct charging method for lithium polymer batteries. At present, lithium charging is mainly voltage-limiting and current-limiting method. In the initial stage, constant current (CC) charging has the strongest acceptance ability. With the charging process going on, polarization is strengthened, temperature rise is intensified, and voltage rises. When the charge reaches about 70-80%, the voltage reaches the maximum charging limit voltage and turns to constant voltage (CV) charging stage. In the constant voltage stage, it takes about 30% of the time to charge 10% of the electricity. The current intensity decreases and the temperature rise does not increase.
Lithium polymer battery is a kind of chemical battery with high energy, miniaturization and lightweight. Here is the correct charging method for lithium polymer batteries.
At present, lithium charging is mainly voltage-limiting and current-limiting method. In the initial stage, constant current (CC) charging has the strongest acceptance ability. With the charging process going on, polarization is strengthened, both temperature and voltage rise. When the charge reaches about 70-80%, the voltage reaches the maximum charging limit voltage and turns to constant voltage (CV) charging stage. In the constant voltage stage, it 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 takes into account the total or average voltage control of the battery pack. In fact, there is always a higher monomer voltage. Compared with other batteries in the pack, they have entered the overcharging stage. Similarly, there are over-discharged batteries in the group when discharging, and the damage caused by over-charging and over-discharging to the batteries is fatal. The difference is that over-charging produces a large number of gases, is prone to spontaneous combustion and explosion, and the appearance of over-discharging changes slowly, but the failure rate is extremely fast, so it should be strictly avoided in normal use.
For this reason, there is a new lithium charging method called parallel control and balanced management, which can manage charging and discharging separately for each energy-saving piston and control equalization. This dynamic balance concentrates the advantages of discharge equalization and charge equalization. Although the initial capacity, voltage and internal resistance of the single piston are different, the relative charge and discharging intensity and resistance can be guaranteed in the work. Depth consistency, progressively reaching a common end point of life. This method is especially suitable for high current discharge. Our company has developed a PCB balanced protection for up to 20 series lithium-ion batteries. The maximum discharge current can reach 100A.
Therefore, when charging lithium batteries, we must use special lithium chargers, especially pay attention to matching the parameters of the lithium batteries used. When lithium batteries are used in combination, we must add PCB protection board to the batteries. Only in this way can we avoid the leakage, leakage, even ignition and explosion of the lithium batteries, and prolong the service life of the batteries as long as possible. Increase the number of battery recycling.
Maintenance methods of lithium polymer batteries
As a new battery product after the innovation of lithium ion batteries, lithium polymer batteries have some noteworthy points in use. Here's how to maintain lithium polymer batteries.
First, the characteristics of lithium polymer batteries. Compared with lithium-ion batteries, lithium-polymer batteries have improved the leakage problem of batteries, but they have not been completely improved. In addition, lithium polymer batteries can be fabricated into ultra-thin batteries. The capacity of lithium polymer batteries can reach 3.6 V400 mA at a thickness of 0.5 mm. Moreover, the discharge capacity of lithium polymer batteries is 10% higher than that of traditional lithium ion batteries.
In daily use, as a kind of lithium-ion batteries, lithium-polymer batteries are often afraid of the short inside, short outside and overcharge of the batteries. The reason is that the chemical properties of lithium are very active. When the battery is discharged and charged, the internal temperature of the battery will continue to rise. When the temperature is too high, it is possible to produce a new Santana explosion.
Therefore, when using batteries, try not to overcharge or overdischarge, that is, to use batteries smoothly and planned, not to let the battery run out easily, and not to charge for too long (generally speaking, within eight hours is the most appropriate).
The above is an introduction to the maintenance methods of lithium polymer batteries. In addition, if you want to maintain the power of lithium polymer batteries, it is better to discharge them completely every month and then fill them up again, which will help the batteries maintain the power and longer service life.
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