The development of electric vehicles, energy storage equipment and other fields, power lithium battery as an important energy storage device, production technology is increasingly mature. This article will comprehensively introduce the production technology of power lithium battery, including the key technologies and development trends in the aspects of cathode material preparation, electrolyte formula, battery assembly process, etc.

I. Preparation technology of cathode material

1. selection of positive electrode materials: lithium manganite, lithium cobalt oxide, lithium iron phosphate and other compounds are usually used for the positive electrode materials of power lithium batteries. Manufacturers need to select appropriate positive electrode materials according to battery performance requirements.

2. Preparation process of positive electrode material: the preparation process of positive electrode material includes raw material mixing, ball milling, drying, tablet, molding, baking and other links. The key lies in controlling the component proportion, particle size and crystallinity of the material.

3. Modification of cathode material: in order to improve battery performance, the cathode material often needs surface modification, such as coating conductive agent on the surface and adding compound additive.

II. Electrolyte formula Technology

1. electrolyte Composition: electrolyte is an important component of power lithium battery, which is usually composed of carbonate solvent, lithium salt and additives. Different formulas will affect the performance and safety of battery.

2. Electrolyte formula optimization: for different cathode materials and battery models, manufacturers need to optimize and adjust the electrolyte formula to achieve the best battery performance.

3. Electrolyte filling: in the production process, it is necessary to accurately control the filling amount and temperature of electrolyte to ensure that electrolyte is fully infiltrated with positive and negative electrode materials and improve the cycle life and safety of the battery.

III. Battery assembly process

1. battery pole piece preparation: The positive and negative electrode materials are formed through coating, baking, tablet and other processes, and good molding process and tablet parameters need to be controlled.

   </li>

2. Battery Assembly: battery assembly includes steps such as stacking positive and negative electrode sheets, layered diaphragm, liquid injection, sealing, etc. The key is to ensure the uniformity and sealing of assembly.

3. Battery Test: After the production is completed, the battery needs to be tested, including capacity test, cycle life test, safety test, etc., to ensure that the product meets the standard requirements.

IV. Development trend of power lithium battery production technology

1. green and environmental protection: in the future, the production technology of power lithium batteries will tend to be green and environmentally friendly, reducing the use of harmful substances, improving the utilization rate of resources, and promoting the sustainable development of the battery industry.

2. Automatic production: With the development of artificial intelligence and robot technology, the production of power lithium batteries will use more automatic equipment and intelligent production lines to improve production efficiency and quality stability.

3. Application of new materials: the research and development and application of new materials such as new positive and negative materials and high-efficiency electrolyte will further promote the performance improvement and cost reduction of power lithium batteries.

As an important energy storage device, power lithium battery plays a key role in electric vehicles, energy storage equipment and other fields. The continuous innovation and improvement of production technology will promote the development of battery industry and provide strong support for the popularization and application of clean energy. In the future, with the progress of technology and the growth of demand, the production technology of power lithium battery will usher in a broader development space and opportunities.