The production process of lithium battery varies according to different lithium battery manufacturers. However, due to the same principle, the main production processes of lithium battery are basically the same, generally including: batching, coating, rolling, cutting, slitting, welding lugs, winding, packaging, baking, liquid injection, formation, forming, volume separation testing and other processes.

Lithium battery occupies a place in people's daily life, but where does it come from? What are the links of lithium battery production process? Although the production process of lithium battery varies from manufacturer to manufacturer, the main production process of lithium battery is basically the same due to the same principle.

In the above steps necessary for the lithium battery production process, five aspects should be paid attention to from material selection to volume separation detection after forming:

1、 Improving the physical and chemical structure of positive and negative active materials is the basic link of lithium battery production process:

1. Properly ion doped materials,

2. Improve the particle size distribution of active materials to avoid too wide particle size distribution of active materials,

3. Try to use materials with disordered layered structure or thin layered structure,

4. Improving the surface structure of electrode materials;

2、 The high adhesion strength of electrode coating is conducive to reducing the rate of reduction of circulating capacity, which is the most technical process in the production process of lithium battery. Therefore, attention should be paid to:

1. The adhesive and solvent used to form the adhesive material should be pure, and the coated electrode should not be stored for too long,

2. The proportion of adhesive and active substance used in the mixture of positive and negative electrode coating film shall be appropriate to ensure that no powder will fall off after coating;

3、 Optimization of electrolyte composition. The requirements of lithium battery production process for electrolyte are to maintain capacity and extend battery life:

1. Through the optimization of lithium salt, solvent and additive, the conductivity of electrolyte is improved and polarization is reduced.

2. Restrain the reaction between positive material and electrolyte,

3. The surface structure of carbon anode materials was improved by controlling the appropriate specific surface area and surface treatment such as coating, film formation and surface chemical reaction;

4、 After the battery material is prepared, the lithium battery production process will enter the assembly process. At this time, pay attention to:

1. The negative capacity is slightly greater than the positive capacity,

2. After winding the positive and negative electrodes and the diaphragm, the particle size of the gap between the positive and negative electrodes and the diaphragm shall not exceed 0.5mm, and the upper and lower deviation shall not exceed 0.5mm.