Detailed explanation of the composition, classification and industrial chain of lithium batteries

First, the composition of lithium-ion battery structure

Lithium-ion battery is a secondary chemical battery (rechargeable chemical battery) whose positive and negative electrodes are composed of two different substances, which can be used for reversible insertion and extraction of lithium ions. During the charging process, lithium ions are extracted from the positive electrode and embedded in the lattice of the negative electrode through the electrolyte, so that the positive electrode is in a high-potential lithium-poor state, and the negative electrode is in a low-potential lithium-rich state; when discharging, the opposite is true, with high voltage and high ratio. With the characteristics of high energy, high specific power, long cycle life, small self-discharge, no memory effect, and environmental friendliness, it is the energy storage technology that is most in line with the development trend of new energy applications.

Second, the main classification of lithium-ion batteries

There are many types of lithium batteries. According to different cathode materials, they can be divided into lithium ferrite batteries, lithium cobalt oxide batteries, lithium manganate batteries, lithium nickel oxide batteries, ternary material lithium batteries, lithium iron phosphate batteries, etc.; according to different electrolyte materials , can be divided into liquid lithium batteries, solid polymer lithium batteries; in terms of packaging, can be divided into flexible packaging, steel shell packaging, aluminum shell packaging, etc.; in terms of use, can be divided into power lithium batteries, consumer lithium batteries , energy storage lithium battery, etc.

3. Lithium-ion battery industry chain

The upstream of lithium batteries includes cathode materials, anode materials, electrolytes, separators, etc. The midstream is lithium battery manufacturers, including BMS, etc. The downstream is mainly lithium battery supporting applications, which have been widely used in consumer batteries, power batteries, and energy storage batteries.