How to charge lithium polymer battery

Lithium polymer battery is a kind of chemical battery with high energy, miniaturization and light weight. Let me introduce the correct method of charging lithium polymer battery. At present, 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 acceptability. As the charging process continues, the polarization uses intensify, the temperature rises intensified, and the voltage rises. When the charge reaches about 70 When ~80%, the voltage reaches the maximum charging limit voltage, and it switches to the constant voltage (CV) charging stage. 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 average 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-charge and over-discharge are fatal to the battery. The difference is that a large amount of gas appears in over-charge, which is easy to spontaneously ignite and explode, and the appearance is violent; The appearance change is gentle, 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 equalization management, which can perform charge and discharge management and equalization control for each cell separately. This dynamic equalization combines two equalization of discharge equalization and charge equalization. Although there are differences in the initial capacity, voltage, internal resistance, etc. between the single cells, the relative charge and discharge intensity and depth consistency can be ensured during work, and the common end of life can be gradually reached. This method is particularly suitable for high-current discharge. Our company has developed PCB equalization protection for up to 20 series lithium batteries, and the maximum discharge current can reach 100A. Therefore, when charging the lithium-ion battery, you must use a dedicated lithium battery charger, especially pay attention to the parameters of the battery used, must be consistent, when the lithium-ion battery is used in combination, be sure to use the battery pack Adding the PCB protection board can prevent the electric core from bagging, leakage, even fire and explosion, and prolong the service life of the battery as long as possible, but the battery can not be discharged, and the number of cycles of the battery is increased. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Introduction to the advantages of lithium-ion battery packs for electric vehicles