Digital interpretation of new energy lithium battery production process: key link analysis

The production of new energy lithium batteries involves several complex process steps, mainly including the following stages:

1. **Electrode manufacturing**: This is the basis of lithium battery manufacturing, including the production of positive and negative electrodes. Positive electrodes are usually made of lithium metal oxides, such as lithium cobaltate and lithium manganese, etc.; negative electrodes are mainly made of graphite materials. First, the raw materials are mixed well with binder and conductive agent, and then the mixture is coated onto metal foil (copper foil negative electrode, aluminum foil positive electrode) through a coating machine to form the pole piece. Next, the coated pole piece is subjected to a series of treatments such as drying, compaction and cutting. Finally, after the lithium slot process on the negative electrode plate, the jack male machine and lithium jack are inserted, and the jack female machine and lithium jack are inserted on the positive electrode plate to reach a fixed distance, and the plug-in is completed.
2. **Core production**: The core is the core part of the lithium battery, which is made of positive pole piece, negative pole piece and diaphragm by winding or stacking. Before winding or stacking, the pole piece and diaphragm need to be precisely aligned and laminated. The shape and structure of the cell will be adjusted according to different application requirements.
3. **Electrolyte Injection**: The electrolyte is the medium for ion transport in lithium batteries and is critical to battery performance. The electrolyte is injected into the cell to form an ion channel between the positive and negative electrodes.
4. **Encapsulation**: Seal the liquid injected cell to form a complete battery. During the encapsulation process, care should be taken to prevent the electrolyte from leaking and air and moisture from entering the battery.
5. **Chemical formation and aging**: Chemical formation refers to the initial charging of newly produced batteries to activate the active substances in the battery and form a stable SEI film (solid electrolyte interface film). Aging, on the other hand, is to test the performance and stability of the battery to ensure the quality of the battery.
6. **Capacitation and Screening**: Capacitation refers to the capacity testing of a battery to determine its specific capacity. Screening, on the other hand, is to grade the batteries according to their capacity, internal resistance and other parameters, and select the batteries that meet the requirements for use.

Throughout the production process, it is also necessary to strictly control the environmental conditions, such as temperature, humidity, cleanliness, etc., to ensure the quality and performance of the battery. In addition, with the continuous development of technology, the production process of new energy lithium batteries is also being optimized and improved to increase production efficiency, reduce costs and enhance the energy density and cycle life of the batteries.
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