Principle of lithium ion battery

Principle of lithium ion battery

Lithium batteries, lithium ion batteries and lithium polymer batteries are often unidentified by these lithium batteries, and the necessary explanation of the principle of lithium ion batteries is the key to the solution of this confusion, because in all of these "lithium" battery theories, the lithium-ion battery principle is a nu that runs through the three.

First of all, we need to clarify the three concepts we put forward at the very beginning. In the history of lithium battery development, the first phase is lithium primary battery, the negative electrode of this kind of battery is lithium metal. On this basis, the second stage developed the rechargeable lithium battery, the lithium ion battery in the theoretical sense, the rechargeable lithium battery is the lithium ion battery without the lithium metal. Because lithium compounds and electrolytes are different as cathode materials, there are principles of lithium ion batteries based on different materials. In recent years, the lithium polymer battery has been developed on the basis of liquid lithium ion battery. Its appearance makes lithium battery enter the third stage. Because lithium polymer battery is the electrolyte of lithium ion battery from liquid to solid or gelation state, its working mechanism is not detached. Li ion battery principle system, but only improved the principle of lithium ion battery.

Secondly, we should understand the principle of lithium-ion battery in structure. Generally speaking, lithium ion batteries have five parts: cathode, anode, diaphragm, organic electrolyte, and shell. In the principle of lithium ion batteries, the diaphragm is the most technical part of manufacturing, while the electrolyte depends on the liquid or the polymer.

Third, understand the principle of lithium-ion battery from the perspective of mechanism. Lithium ion battery is the general name of lithium ion embedded compound as the cathode material. In this sense, the lithium ion battery, as long as it is the working mechanism of lithium ion batteries, whether it is liquid or polymer, and many battery manufacturers are trying to build power batteries, are suitable for the universal lithium-ion battery principle. Under the principle of lithium ion batteries, the charging process of the battery is the embedding and inlaying process of the lithium ion. The lithium ion is inlaid and the anode is embedded from the cathode through the electrolyte. The discharge is the opposite.

Understanding the principle of the lithium ion battery above, we can finally use an image metaphor as a conclusion. People generally use "rocking chair battery" as a description of the principle of lithium ion batteries. That is, lithium ions are always in the "positive pole negative positive" movement state, making the lithium ion battery like a rocking chair and the two ends of the rocking chair. The battery is positive and negative. Li ion is the "human" moving at both ends. The analogy is based on the mechanism of lithium ion battery.