(1) Lithium ion battery composition

           Lithium ion battery composition is composed of the battery cell (such as sailing batteries) and protecting the circuit board. The battery cell is an important and core component of the battery. The quality directly determines the quality of the lithium -ion battery. The main structures of lithium ion cells include four parts: positive poles, negative materials, electrolytes, and diaphragm. The quality of lithium ion batteries is the material and production process that decides.

           (2) Classification of lithium ion batteries

           Lithium -ion batteries can be classified according to the positive pole materials, fields, outer packaging materials and shapes. We can be divided into power lithium -ion batteries and non -power lithium -ion batteries according to the application field; according to the packaging materials, it is divided into steel shell lithium -ion batteries, aluminum shell lithium -ion batteries, and soft bag lithium -ion batteries. The outer packaging material of the soft -pack lithium ion battery is an aluminum -plastic composite film, which has the advantages of higher energy density, low mold opening cost, good stability, and flexible design. In recent years, the market share of soft -bag lithium -ion batteries has shown an upward trend, especially in the field of 3C products. In the future, the application scope of soft bag ion batteries will be further expanded.

           (3) The industrial chain of lithium ion batteries

           After nearly two decades of development, the lithium -ion battery industry chain has formed an industrial chain system with a high degree of professionalism and clear division of labor. The upstream is a manufacturer of lithium ion positive and negative electrode materials, electrolytes, diaphragms, other materials and production equipment; midstreams are lithium ion battery and battery module manufacturers, namely lithium battery manufacturers; downstream application markets include consumer products, power products And energy storage products.