The difference between lithium polymer battery and lithium battery

Introduction to Lithium Batteries 1. What is Lithium Batteries? Lithium batteries are widely used in various electronic devices: mobile phones, laptops, pdas, etc. Lithium batteries are not a special technology for model airplanes. Lithium polymer batteries and lithium batteries have the same voltage 3.6v in common. Of course there are differences. Lithium batteries are encapsulated in metal casings, while lithium polymer batteries are encapsulated in flexible packaging. Ordinary lithium polymer batteries are made of square wafers with positive and negative electrodes (Figure 10). Its outstanding advantage is light weight, which is very suitable for aviation models. 2. Voltage and number of batteries The voltage of the lithium battery is 4.2v after being fully charged, and 3.0v after being discharged. These two limits cannot be exceeded during use, otherwise the battery will be damaged. The specific method to prevent the voltage of the lithium battery from falling below 3.0V is to set the minimum voltage in the electronic governor. When the voltage of a single battery drops below 3.0v, the manipulator gets feedback from the sudden drop in power and knows that it is time to land the model. If the electronic governor has an automatic lithium battery mode, it can automatically determine the number of batteries and automatically set the voltage limit. What is 3.10c? What is 3s4p? The discharge rate of the battery can be expressed by c, 1C means that the battery is used up in one hour, and 2C means half an hour. The discharge time is the reciprocal of c. The power of the battery is measured in milliamperes. Regarding a 2 kiloampere battery, if it is charged with a 2 kiloampere current, it will be fully charged in one hour. There is a simple mathematical relationship between the battery capacity, the number of C, and the discharge current. If the A2000 mA battery is discharged with 1C, the discharge current is 2000 mA×1u003d2A; if the discharge is 3C, the discharge current is 2000mA×3u003d6A. All batteries have a finite discharge rate. In order to achieve this goal, several lithium batteries are usually used at the same time to obtain a large current. The positive electrode of the battery is connected in parallel with the positive electrode, and the negative electrode is connected with the negative electrode. If you connect two lithium batteries at the same time, you will get twice the current. Two 2000 mAh lithium batteries in parallel are equivalent to a 4000 mAh lithium battery, the C number is the same as the original, and the rated current is twice the original. In other words, if the primary battery can discharge 5C and 10A, it can discharge 5C and 20A after connecting in parallel. Modelers usually use this method to obtain large discharge currents. The naming method of xSxP clearly expresses the number of batteries in series and parallel, the number before S is the number of batteries in series and parallel, and the number before P is the number of batteries in parallel. 3S4P, 2100mAh lithium battery, contains 12 batteries. Assuming that the discharge rate is 6C, the voltage is determined by the number of batteries connected in series 3, and the discharge current is determined by the number of batteries connected in parallel. Therefore, the rated voltage of the battery is 10.8v (3×3.6v), and the maximum discharge current is 50.4a (2100mA×6×4). Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Overview of polymer lithium batteries