Introduce the characteristics, charging characteristics and usage of lithium-ion batteries

Lithium-ion batteries can be used for multiple recharging of DC power supplies as a variety of electronic devices. Through the relevant comprehensive evaluation, it can be known that lithium-ion batteries have the characteristics of small size, light weight, large capacity, environmental protection, and multi-cycle. Now lithium-ion batteries have become mainstream batteries, and many lithium-ion battery manufacturers produce such batteries. The following article introduces the characteristics, charging characteristics and usage methods of lithium-ion batteries, and gives you a detailed explanation. Lithium-ion battery characteristics Lithium-ion batteries are divided into liquid lithium-ion batteries and polymer lithium-ion batteries. The liquid lithium-ion battery is a secondary battery with lithium ions embedded in its positive and negative electrodes. The lithium compound LiCoMo2 is used as the cathode, and the lithium-carbon intercalation compound is used as the cathode. Lithium-ion batteries usually have two shapes: cylindrical and square. The inside of the battery is spiral, made of a very fine, permeable polyethylene film separator material, which is located between the positive and negative electrodes. The positive electrode is made of lithium cobalt oxide and aluminum foil, and the negative electrode is mainly made of graphite carbon and other materials. The battery is filled with organic electrolyte solution and installed with safety elements to protect the battery from damage under abnormal conditions and short-circuit output. 3.7v lithium ion battery Generally speaking, if it is a single-cell battery, the voltage is controlled within 3.7v and cannot exceed this voltage range. Therefore, a single lithium-ion battery is often processed in series and parallel to meet the requirements of different occasions. Rechargeable characteristics of lithium-ion batteries 1. Lithium-free: that is, the battery does not contain lithium metal, so it is not forbidden to carry lithium-ion batteries on passenger aircraft. 2. Pollution-free: Li-ion batteries do not contain harmful metals such as cadmium, lead, and mercury. 3. High cycle life: Under normal conditions, it can continue to be used for more than 500 times, if lithium iron phosphate is used, it can be used for more than 2000 times. 4. High energy density: In terms of weight, there is also a great improvement, and it is lighter. If lithium-ion batteries are used, the weight of other nickel-cadmium batteries of similar capacity is about half of them. The capacity of lithium-ion batteries is 20-30% of the capacity of nickel-hydrogen batteries and 35-50% of the capacity of nickel-hydrogen batteries. 5. High voltage: As mentioned above, if it is a single lithium ion battery, the most suitable voltage working environment is within 3.7v. Compared with other types of batteries, it will have more advantages, which can basically be equivalent to three A series of nickel-cadmium batteries or nickel-hydrogen batteries. 6. Over-discharge resistance: When over-discharge, excessive lithium ions fall off from the electrode, causing the crystal lattice to collapse and shorten the service life. The use of lithium-ion batteries In 18650, lithium-ion batteries formed lithium ions on the positive electrode of the battery and moved to the negative electrode through the electrolyte. As a negative electrode, carbon has a layered structure with many holes on it, which is very useful for capacity expansion. Another important thing is that if the lithium electrons we use are discharging, which means that the device is working, the lithium ions in the carbon layer of the negative electrode will be directly moved back to the positive electrode. The more lithium ions in the cathode, the greater the discharge capacity. Therefore, lithium-ion battery manufacturers recommend that you use a special constant current and constant voltage charger when charging. 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: On the importance of lithium-ion battery cathode materials