Views: 0 Author: Site Editor Publish Time: 2024-07-02 Origin: Site
1. Optimization of key processes
1. Cell pole sheet preparation
Cell pole sheet preparation is one of the key links in lithium battery cell manufacturing, and its quality directly affects the performance of the battery. At present, the preparation of cell pole sheets mainly adopts the coating process, that is, the positive electrode material and the negative electrode material are coated on the metal foil respectively. In order to improve the coating quality and efficiency, researchers continue to optimize the coating process parameters, such as coating speed, coating thickness, coating temperature, etc. Use advanced coating equipment, such as slit coater, blade coater, etc.
2. Cell winding/stacking
Cell winding/stacking is one of the key processes for assembling cell pole sheets into cells. At present, cell winding/stacking mainly adopts two methods: winding process and lamination process. The winding process is to wind the battery cell pole piece into a cylindrical battery cell, which has the advantages of high production efficiency and low cost; the stacking process is to stack the battery cell pole piece into a square battery cell, which has the advantages of high energy density and low internal resistance. In order to improve the quality and efficiency of battery cell winding/stacking, researchers continue to optimize the winding/stacking process parameters, such as winding speed, winding tension, number of stacking layers, etc. Use advanced winding/stacking equipment, such as fully automatic winding machines, fully automatic stacking machines, etc.
3. Battery Cell Welding
Battery cell welding is one of the key processes for connecting the battery cell pole piece to the battery cell shell. At present, battery cell welding mainly adopts laser welding, ultrasonic welding and other methods. Laser welding has the advantages of fast welding speed, high welding quality, and small welding heat affected zone; ultrasonic welding has the advantages of high welding efficiency, low welding cost, and no pollution. In order to improve the quality and efficiency of battery cell welding, researchers continue to optimize welding process parameters, such as welding power, welding speed, welding pressure, etc. The use of advanced welding equipment, such as fully automatic laser welding machines, fully automatic ultrasonic welding machines, etc., can also improve the quality and efficiency of welding.
4. Cell injection
Cell injection is one of the key processes for injecting electrolyte into the cell. At present, cell injection mainly adopts vacuum injection, normal pressure injection and other methods. Vacuum injection has the advantages of fast injection speed, high injection quality and good injection uniformity; normal pressure injection has the advantages of low injection cost and simple injection operation. In order to improve the quality and efficiency of cell injection, researchers continue to optimize the injection process parameters, such as injection speed, injection pressure, injection temperature, etc. Advanced injection equipment, such as fully automatic vacuum injection machine, fully automatic normal pressure injection machine, etc., are used to improve the quality and efficiency of injection.
5. Cell packaging
Cell packaging is one of the key processes for assembling cells into batteries. At present, cell packaging mainly adopts aluminum-plastic film packaging, steel shell packaging and other methods. Aluminum-plastic film packaging has the advantages of light weight, good sealing and high safety; steel shell packaging has the advantages of high strength, good impact resistance and low cost. In order to improve the quality and efficiency of battery cell packaging, researchers continue to optimize packaging process parameters, such as packaging temperature, packaging pressure, packaging time, etc. Use advanced packaging equipment, such as fully automatic aluminum-plastic film packaging machines, fully automatic steel shell packaging machines, etc., to improve the quality and efficiency of packaging.
2. Technological innovation and breakthrough
1. Precision manufacturing technology
Precision manufacturing technology is one of the key technologies to improve the manufacturing precision and consistency of lithium battery cells. At present, precision manufacturing technology mainly includes coating technology, winding/stacking technology, welding technology, injection technology, etc. By optimizing the process parameters of these technologies and using advanced equipment, the dimensional accuracy and consistency of the battery cells are improved to improve the performance and safety of the battery.
2. New packaging technology
New packaging technology is one of the key technologies to improve the quality and reliability of lithium battery cell packaging. At present, new packaging technologies mainly include heat sealing technology, ultrasonic packaging technology, laser packaging technology, etc. These technologies have higher sealing performance and lower energy consumption, providing strong guarantees for the safety and reliability of the battery cells.
3. Intelligent manufacturing technology
Intelligent manufacturing technology is one of the key technologies to improve the manufacturing efficiency and quality stability of lithium battery cells. At present, intelligent manufacturing technology mainly includes automated production equipment, intelligent control systems, industrial Internet, etc. By introducing these technologies, the automation, intelligence and informatization of the battery cell manufacturing process can be realized, and the production efficiency and quality stability can be further improved.
4. Application of new materials
The application of new materials is one of the key technologies to improve the performance of lithium battery cells and reduce costs. At present, the application of new materials mainly includes positive electrode materials, negative electrode materials, electrolytes, diaphragms, etc. By developing and applying new materials, the energy density, cycle life, safety and other performance of the battery cells can be improved and the cost can be reduced.
3. Future development trends
1. Green manufacturing
Green manufacturing is one of the important development directions of lithium battery cell manufacturing in the future. Environmentally friendly materials, energy-saving equipment and recycling technology are used to reduce energy consumption and emissions in the production process and achieve green and sustainable production.
2. Flexible manufacturing
Flexible manufacturing is one of the important development directions of lithium battery cell manufacturing in the future. The introduction of modular and reconstructed production lines can achieve rapid switching and production of different specifications and types of cells to meet the diverse needs of the market.
3. Intelligent manufacturing
Intelligent manufacturing is one of the important development directions of lithium battery cell manufacturing in the future. The introduction of technologies such as artificial intelligence and big data can realize intelligent monitoring, fault diagnosis and optimization control of the production process, and improve production efficiency and quality stability.
4. High-performance manufacturing
High-performance manufacturing is one of the important development directions of lithium battery cell manufacturing in the future. Continuously improving the energy density, cycle life, safety and other performance of the cell can meet the demand for high-performance batteries in new energy vehicles, mobile electronic devices and other fields.
4，Summary
The innovation and development of lithium battery cell manufacturing technology is moving towards automation, intelligence, precision and greening to adapt to the rapid development of the new energy vehicle market and the continuous advancement of battery technology.
