Lithium iron phosphate batteries are a new type of lithium-ion battery with advantages such as high energy density, long cycle life, and good safety, making them widely used in electric vehicles, energy storage systems, and other fields. The mainstream production process of lithium iron phosphate batteries mainly includes raw material preparation, positive and negative electrode material preparation, battery assembly, and other processes.

First is raw material preparation. The main raw materials of lithium iron phosphate batteries include lithium salts, lithium iron phosphate positive and negative electrode materials, electrolytes, etc. Lithium salts are important raw materials for batteries, usually in the form of lithium carbonate, lithium hydroxide, etc. The lithium iron phosphate positive and negative electrode materials are the core part of the battery, with the positive electrode material usually being lithium iron phosphate and the negative electrode material usually being graphite. The electrolyte is the conductive medium in the battery, usually a mixture of carbonate solvent and lithium salt.

Next is the preparation of positive and negative electrode materials. The preparation process of the positive electrode material includes mixing, pressing, baking, etc. First, lithium iron phosphate powder is mixed with conductive agents, binders, etc., then pressed into sheets using a press, and finally baked at high temperature to form a solid positive electrode sheet. The preparation process of the negative electrode material is similar, mainly mixing graphite powder with conductive agents, binders, etc., then pressing, baking, and forming negative electrode sheets.

Finally, battery assembly. Battery assembly involves assembling positive and negative electrode materials, separators, electrolytes, etc., to form a complete battery. First, the positive and negative electrode sheets are stacked with the separator, then assembled into a battery core through winding or stacking, and finally placed in the battery shell, filled with electrolyte, sealed, and packaged to form the finished battery.

In summary, the mainstream production process of lithium iron phosphate batteries includes raw material preparation, positive and negative electrode material preparation, battery assembly, and other processes. Each step requires strict control of process parameters to ensure the performance and safety of the battery. With the continuous expansion of the electric vehicle, energy storage system, and other markets, the production process of lithium iron phosphate batteries is continuously optimized and improved to meet market demand.