18650 battery cell

　　18650 battery cell processing price and 18650 battery cell processing process

　　18650 battery cell processing price and 18650 battery cell processing process. Our country has achieved rapid development in new energy and energy conservation and emission reduction, becoming an important energy storage component in the 21st century. The technical level of battery development will directly affect the development speed and quality of the entire new energy industry. With the restriction of the use of traditional lead-acid batteries, lithium batteries have provided a good development opportunity. Today we will introduce the 18650 battery cell processing price and 18650 battery cell processing process.

　　18650 battery cell processing price

　　The development of lithium batteries is rapid, but it is also imperfect. After all, the development time is not long enough, and there is still room for progress. Therefore, there is still a broad prospect for the processing of lithium batteries.

　　However, in terms of specific prices, the prices of different merchants are different. It is best to compare multiple companies to process the required lithium batteries at a more suitable price.

　　Introduction to 18650 battery cell processing process

　　As we all know, the production process of lithium batteries is quite complicated. After all, the safety performance of lithium-ion battery products is directly related to the life and health of consumers. Naturally, the production and manufacturing of lithium batteries has high requirements on the performance, accuracy, stability and automation level of the equipment. . Take the preparation of electrode slurry in the 18650 battery cell production process as an example. This link is the most front-end link and the most important link in the entire production process. After all, the electrode slurry mixing and dispersion process has an impact on product quality of more than 30%. %. Why?

　　The reason is that the preparation of positive and negative electrode slurries for lithium batteries includes a series of processes such as mutual mixing, dissolution, and dispersion of liquids and liquids, liquids and solid materials, and is accompanied by changes in temperature, viscosity, environment, etc. In the positive and negative electrode slurries, the dispersion and uniformity of the granular active materials directly affect the movement of lithium ions between the two poles of the battery, so the dispersion quality of the electrode slurry directly affects the product performance of lithium batteries.

　　18650 battery cell processing process

　　Objectively speaking, the 18650 battery cell production process is divided into three major sections, one is pole piece production, the other is cell production, and the third is battery assembly. In the 18650 battery cell production process, pole piece production is the foundation, battery core production is the core, and battery assembly is related to the quality of the finished 18650 battery cell. The specific steps of the 18650 battery cell production process include positive electrode slurrying, negative electrode slurrying, positive electrode sheets, negative electrode sheets, steel case assembly, liquid injection and testing, and packaging.

　　The 18650 battery cell equipment corresponding to the front-end process of 18650 battery cell production mainly includes vacuum mixers, coating machines, roller presses, etc.; the middle-stage process mainly includes die-cutting machines, winding machines, lamination machines, liquid injection machines, etc.; the back-end process includes formation machines. , volumetric testing equipment, process warehousing and logistics automation, etc. In addition, the production of battery packs also requires Pack automation equipment.

　　◆18650 battery cell front-end production process

　　Pole piece manufacturing is related to battery core performance

　　The result of the 18650 battery cell front-end process is to prepare the positive and negative electrode sheets of the 18650 battery cell. The first step is stirring, that is, mixing the positive and negative solid-state battery materials evenly, adding the solvent, and stirring them into a slurry through a vacuum mixer. The mixing of ingredients is the basis for the subsequent 18650 battery cell process, and high-quality mixing is the basis for the high-quality completion of the subsequent coating and rolling processes.

　　The coating and rolling process is followed by slitting, where the coating is slit. If burrs are generated during the cutting process, there will be safety risks during subsequent assembly, electrolyte injection, and even battery use. Therefore, the front-end equipment in the 18650 battery cell production process, such as mixers, coating machines, roller presses, slitting machines, etc., are the core machines of battery manufacturing and are related to the quality of the entire production line. Therefore, the value (amount) of the front-end equipment accounts for the entire 18650 battery cell production line. Automated production lines have the highest proportion, about 35%.

　　◆18650 battery cell mid-stage process flow

　　Efficiency comes first, winding goes before lamination

　　In the 18650 battery cell manufacturing process, the middle process is mainly to complete the forming of the battery. The main process includes sheeting, pole piece winding, die cutting, cell winding and lamination forming, etc. It is currently a fierce competition among domestic equipment manufacturers. A field that accounts for about 30% of the value of 18650 battery cell production lines.

　　At present, the cell manufacturing processes of power lithium batteries mainly include winding and lamination. The corresponding battery structures are mainly cylindrical, square, and soft-packed. Cylindrical and square batteries are mainly produced using the winding process, while soft-packed batteries are Mainly using lamination technology. The cylindrical ones are mainly represented by 18650 and 26650 (Tesla has independently developed the 21700 battery and is promoting it throughout the industry). The difference between square and soft packages is that the outer shells are made of hard aluminum shells and aluminum-plastic films respectively. The soft packages are mainly made of lamination technology. Mainly, the aluminum shell is mainly based on the winding process.

　　The soft package structure is mainly aimed at the mid-to-high-end digital market. The profit margin per unit product is relatively high. Under the same production capacity, the relative profit is higher than that of aluminum-shell batteries. Since aluminum-shell batteries are easy to form economies of scale, and product qualification rates and costs are easy to control, both currently have considerable profits in their respective market fields. In the foreseeable future, it will be difficult for both to be completely replaced.

　　Since the winding process can achieve high-speed production of battery cells through rotational speed, but the speed that lamination technology can increase is limited, domestic power lithium batteries currently mainly use the winding process. Therefore, the shipment volume of winding machines is currently larger than that of lamination. Chip machine.

　　The corresponding front-end processes for winding and lamination production are pole piece production and die-cutting. Production includes welding the slit pole pieces/lugs, dusting the pole pieces, applying protective tape, wrapping the tabs, and winding or cutting to length, in which the winding pole pieces are used for subsequent fully automatic winding. The cut-to-length pole pieces are used for subsequent semi-automatic winding; the punched pole pieces are rolled and punched into shape for subsequent lamination processes.

　　◆18650 battery cell back-end process flow

　　Volumetric formation is the core link

　　The back-end production process of lithium batteries mainly consists of four processes: volume separation, formation, testing and packaging and warehousing, accounting for about 35% of the value of the production line. Formation and volume separation are the most important links in the back-end process, and the formed batteries are activated and tested. Since the battery has a long charge and discharge test cycle, the value of the equipment is the highest. The main function of the formation process is to charge and activate the cells after liquid injection and encapsulation. The capacity dividing process is to test the battery capacity and other electrical performance parameters and classify them after the battery is activated. The formation and volume separation are performed by the formation machine and the volume separation machine respectively, usually by an automated volume separation and conversion system.

　　It can be seen that all aspects of the 18650 battery cell production process are closely related to product quality and safety. Each link in the 18650 battery cell production process must be strictly and carefully managed in order to improve the safety performance of 18650 battery cell products. .

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