What are the lithium battery manufacturing process and processing raw materials?

Lithium battery manufacturing process: Lithium battery manufacturing process: the first, middle and back three processes, accounting for close to 35%/30%/35%. The critical processing process includes the stirring and coating stage of electrode production (front stage), the winding and liquid injection stage of cell synthesis (middle stage), and the packaging test stage of chemical packaging (back stage). The value amount (purchasing amount) accounts for approximately It is (35~40%):(30~35)%:(30~35)%. The difference mainly comes from the different equipment suppliers, the difference in the ratio of imported/domestic products, etc. The process flow is basically the same, and the proportion of value is deviated, but the overall proportion is in line with this ratio. Objectively speaking, the lithium battery processing process is divided into three sections, one is pole piece production, the other is battery cell production, and the third is battery packaging. In the lithium battery processing technology, the production of pole pieces is the foundation and the production of battery cells is the core. The packaging of the battery is related to the quality of the finished lithium battery. The detailed process of the lithium battery processing process includes positive electrode drawing, negative drawing slurry, positive electrode sheet, negative electrode sheet, steel shell assembly, liquid injection and testing, and packaging. Lithium battery front-end processing technology: the production of pole pieces is related to the core performance of the battery. The result of the front-end process of the lithium battery is to prepare the positive and negative electrodes of the lithium battery. The first process is stirring, that is, the positive and negative solid battery materials are mixed and the solvent is added. , Stir it into a slurry with a vacuum mixer. The mixing of ingredients is the basis for the follow-up process of lithium battery, and the high-quality mixing is the basis for the high-quality completion of the follow-up coating and rolling process. The coating and rolling process is followed by slitting, that is, the slitting process for coating is solved. If there are burrs during the slitting process, subsequent assembly, electrolyte injection and other procedures, or even safety hazards during battery use, may occur. Therefore, the front-end equipment in the lithium battery processing process, such as mixers, coating machines, roller presses, and slitting machines, are the core machines for battery manufacturing. They are related to the quality of the entire processing line. Therefore, the value (amount) of the front-end equipment accounts for the entire The proportion of lithium battery automated processing lines is the highest, about 35%. Lithium battery middle process flow: efficiency pioneer, winding before lamination. During the lithium battery manufacturing process, the middle process is to complete the battery forming. The key process flow includes sheet making, pole piece winding, die cutting, and cell winding Forming and lamination forming are areas where domestic equipment manufacturers are currently competing fiercely, accounting for about 30% of the value of lithium battery processing lines. At present, there are two types of core manufacturing processes for power lithium batteries: winding and lamination. The corresponding battery structures are mainly cylindrical and square, and soft-packed. Cylindrical and square batteries are mainly processed by winding technology, while soft-packed batteries are It is important to adopt the lamination process. Analysis of raw materials for lithium battery processing: The critical raw materials for processing lithium batteries include lithium cobalt oxide, lithium nickel oxide, lithium manganate, three raw materials, lithium iron phosphate, and so on. The essential components of lithium battery processing materials include: positive electrode material, negative electrode material, separator, and electrolyte. It also includes other parts such as packaging. At present, the supply of raw materials for lithium batteries is sufficient, the output of some products is sufficient, and the competition is fierce, and its market prices continue to fall; however, the output of a small number of high-end products is insufficient, and the price of high-end raw materials is too high. Overall, the lithium battery industry is still hot. In fact, in the field of lithium battery cathode materials, any small technological innovation may set off a new round of market expansion. Chinese companies should strengthen the research and development of key technologies of cathode materials, gain an international leading position, and strengthen core competitiveness. Gain advantages in international competition. It can be seen that each processing link in the lithium battery processing process is closely related to product quality and safety. Every link in the lithium battery processing process must be strictly and carefully managed, so as to improve the safety performance of lithium battery products. . Lithium battery materials are generally in the current situation of overproduction in the low-end and middle-end products and short supply of high-end products. Lithium batteries are a new generation of green high-energy batteries with excellent performance and have become one of the focuses of high-tech development. Disclaimer: Some pictures and content of the articles published on this site are from the Internet, please contact to delete if there is any infringement. Previous: What are the characteristics of electrolytes in different batteries