button battery cr2032 manufacturing process

Lithium batteries have unparalleled advantages in the combination of energy density and power density, and are therefore widely used in various portable electronic products, power tools, and electric/hybrid vehicles. Below, the editor will give you a detailed introduction to the button battery cr2032 manufacturing process and PACK basics. The processes of lithium batteries with different structural forms and different materials are similar, but the equipment needs to be completely configured. Lithium-ion batteries are mainly composed of four parts: positive electrode, negative electrode, non-aqueous electrolyte, and diaphragm. At present, the lithium batteries used more in the market are mainly lithium iron phosphate batteries and ternary lithium batteries. The raw materials of the positive electrodes of the two are quite different. The production process is relatively similar, but the process parameters need to change greatly. If lithium iron phosphate is fully replaced with ternary materials, the rectification effect of the old production line is not good. For battery manufacturers, it is necessary to replace a large area of equipment on the production line. button battery cr2032 manufacturing process: three processes, front, middle and back, accounting for nearly 35%/30%/35%. The production process of lithium batteries is relatively complicated. The main production process mainly covers the stirring and coating stage of electrode production (front stage), the winding and liquid injection stage of battery cell synthesis (middle stage), and the packaging and testing stage of formation and packaging (back stage). The value (purchase amount) accounts for about (35~40%): (30~35)%: (30~35)%. The difference mainly comes from different equipment suppliers and differences in the proportion of imports/domestic products. The process is basically the same, and the value share is biased but generally in line with this proportion. The button battery cr2032 equipment corresponding to the front stage of button battery cr2032 production mainly includes vacuum mixers, coating machines, roller presses, etc.; the middle stage mainly includes die-cutting machines, winding machines, stacking machines, liquid injection machines, etc.; the back stage includes formation machines, capacity detection equipment, process warehousing and logistics automation, etc. In addition, the production of battery packs also requires Pack automation equipment. The front-end production process of lithium batteries: the manufacturing of pole pieces is related to the core performance of batteries. The result of the front-end process of lithium batteries is the preparation of positive and negative pole pieces of lithium batteries. The first step is stirring, that is, mixing the positive and negative solid-state battery materials evenly, adding solvents, and stirring them into a slurry through a vacuum mixer. The stirring of ingredients is the basis of the subsequent process of lithium batteries, and high-quality stirring is the basis for the high-quality completion of subsequent coating and rolling processes. After the coating and rolling processes, there is slitting, that is, the coating is subjected to a slitting process. If burrs are generated during the slitting process, there will be safety hazards in the subsequent assembly, electrolyte injection and other procedures, and even during the use of the battery. Therefore, the front-end equipment in the button battery cr2032 production process, such as mixers, coaters, roller presses, slitting machines, etc., are the core machines of battery manufacturing, which are related to the quality of the entire production line. Therefore, the value (amount) of the front-end equipment accounts for the highest proportion of the entire button battery cr2032 automation production line, about 35%. button battery cr2032 mid-stage process: efficiency first, winding before lamination In the button battery cr2032 manufacturing process, the mid-stage process is mainly to complete the battery molding. The main process includes film making, pole winding, die cutting, battery cell winding and lamination, etc. It is a field where domestic equipment manufacturers are currently competing fiercely, accounting for about 30% of the value of button battery cr2032 production lines.

At present, there are two main battery cell manufacturing processes for power lithium batteries: winding and lamination. The corresponding battery structure forms are mainly cylindrical, square and soft pack. Cylindrical and square batteries are mainly produced by winding process, while soft pack batteries are mainly produced by lamination process. The cylinder is mainly represented by 18650 and 26650 (Tesla has independently developed 21700 batteries and is promoting them throughout the industry). The difference between square and soft pack is that the outer shell uses two types of hard aluminum shell and aluminum plastic film respectively. Among them, soft pack is mainly based on lamination process, while aluminum shell is mainly based on winding process. The soft pack structure is mainly aimed at the mid-to-high-end digital market, with a higher profit margin per unit product. Under the same production capacity conditions, 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 have considerable profits in their respective market areas. In the foreseeable future, it is difficult for both to be completely replaced. Since the winding process can achieve high-speed production of battery cells through the rotation speed, and the speed that can be increased by the stacking technology is limited, the current domestic power button battery cr2032 mainly adopts the winding process, so the shipment volume of the winding machine is currently greater than that of the stacking machine. The front process corresponding to the winding and stacking production is the production and die-cutting of the pole piece. The production includes welding of the pole piece/ear after slitting, dust removal of the pole piece, application of protective tape, rubber coating of the ear, and winding or fixed-length cutting. The winding pole piece is used for subsequent fully automatic winding, and the fixed-length cutting pole piece is used for subsequent semi-automatic winding; the punching pole piece is to wind and punch the slit pole piece for subsequent stacking process. In terms of button battery cr2032 packaging welding, the mainstream laser technology integration application manufacturers such as Lianying, Daju, and Guangda are all involved, which can meet the demand without importing. The back-end process of lithium batteries: Capacity separation and formation are the core links. The back-end production process of lithium batteries mainly consists of four processes: capacity separation, formation, testing, and packaging and warehousing, which account for about 35% of the value of the production line. Formation and capacity separation are the most important links in the back-end process. The formed batteries are activated and tested. Since the battery charge and discharge test cycle is long, the value of the equipment is the highest. The main function of the formation process is to charge and activate the battery cells after liquid injection and packaging, and the capacity separation process is to test the battery capacity and other electrical performance parameters after the battery is activated and graded. Formation and capacity separation are respectively completed by the formation machine and the capacity separation machine, which are usually completed by an automated capacity separation and formation system.

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