Lithium batteries, lithium-ion batteries, lithium polymer batteries, people are often confused by these batteries with "lithium" things, the lithium-ion battery principle to explain the necessary to become the key to unlock this confusion, because in all these batteries involving "lithium" theory The lithium-ion battery principle is a link through the three, with the role of the previous and the next.
First, to clarify the three concepts that we first proposed. In the history of the development of lithium batteries, the first stage is the lithium primary battery, the negative electrode of this battery is lithium metal, based on this, the second stage of the development of rechargeable lithium batteries, that is, theoretical lithium-ion batteries, rechargeable lithium batteries are no lithium metal, only lithium ion batteries. Due to the different lithium-containing compounds and electrolytes used as the cathode material, there are thus lithium-ion battery principles based on different materials. In recent years, people often say that the lithium polymer battery is based on the development of liquid lithium-ion battery, its appearance makes the lithium battery into the third stage, because the lithium polymer battery is a lithium-ion battery electrolyte from the liquid state to improve the solid or gel state of the battery, and therefore, its working mechanism is not separated from the lithium-ion battery principle system, but only improved the lithium-ion battery principle.
Second, to understand the lithium-ion battery principle in the structure. Generally speaking, lithium-ion batteries have five parts: positive electrode, negative electrode, diaphragm, organic electrolyte, shell, in the lithium-ion battery principle, the diaphragm is the most technical manufacturing link, while the electrolyte is different depending on the liquid or polymer.
Third, understanding the principle of lithium-ion batteries from the mechanism of action. Lithium-ion battery is a general term for a battery with lithium ions embedded in a compound as the cathode material. In this sense, as long as the lithium-ion battery of this working mechanism, whether it is liquid or polymer, and the power battery that many battery manufacturers are working on, all apply to the universal lithium-ion battery principle. Under the lithium-ion battery principle, the battery charging process is the process of embedding and de-embedding of lithium ions. When charging, lithium ions are de-embedded and embedded in the negative electrode from the positive electrode through the electrolyte. The opposite is true when discharging.
Understand the above lithium-ion battery principle, finally you can use an analogy to conclude, people generally use the "rocking chair battery" as a description of the principle of lithium-ion battery, that is, lithium ions are always in the "positive - negative - positive" state of motion, so that the lithium-ion battery like a rocking chair battery. So that the lithium-ion battery like a rocking chair, the two ends of the rocking chair for the positive and negative ends of the battery, lithium ion is the movement at both ends of the "people", this metaphor is the mechanism to elaborate the principle of lithium-ion battery.
