Everbright Laser Jianghongdao: The fastest efficiency of multi-cell Z-type lamination of lithium battery is 0.06s/pcs

　　At this stage, the lithium battery industry is experiencing a period of deep change, from the technical perspective, with the expansion of battery cells, the lamination process has gradually been adopted by the industry and become the mainstream, and the innovation and iteration of lamination technology is imminent; From the perspective of cost reduction, with the continuous maturity of battery technology, how to reduce costs from the level of process, equipment and manufacturing, and enhance the competitiveness of enterprises has become one of the important directions for industrial chain enterprises to tackle key problems.

　　In terms of the market, data shows that from January to March 2024, the total sales volume of Continental Power and other batteries was 167.7GWh, a year-on-year increase of 35.5%. Among them, lithium batteries, as the absolute main force, helped the penetration rate of new energy passenger vehicles in mainland China to exceed 50% in the first half of April 2024, reaching 50.39%, accounting for more than traditional fuel vehicles for the first time.

　　It is worth noting that while new energy passenger vehicles maintain a rapid growth rate, their price competition is becoming more and more fierce. The demand for vehicle cost reduction and efficiency increase has been transmitted to the upstream battery manufacturing process, and lithium battery manufacturing enterprises have also upgraded from focusing on production capacity release to paying more attention to production line technology and extreme cost reduction and efficiency increase.

　　From the perspective of manufacturing process, with the development trend of high integration and length and thinning of square cells, compared with the winding process, the performance advantages of the lamination process are obvious: it can not only make the battery cells have high energy density, stable internal structure, high consistency, high safety, high rate and long cycle life, but also can help reduce costs and increase efficiency in the manufacturing process of battery cells.

　　At present, leading battery companies, including CATL, BYD, EVE Lithium Energy, Honeycomb Energy, etc., have laid out the lamination route. The agency predicts that by 2025, the global demand for stacking machines will exceed 30 billion yuan, with an average annual compound growth rate of 43% from 2022 to 2025.

　　In this context, the lamination technology and equipment upgrade based on efficiency and yield improvement have become one of the focuses of competition in the middle production link of lithium batteries. "The fourth-generation multi-chip Z-type stacking machine developed by Everbright Laser has a stacking efficiency of 0.06-0.16s/pcs."

The picture shows Jiang Hongdao, deputy general manager of Shenzhen Everbright Laser Technology Co., Ltd., giving a speech

　　At the 5th International Conference on New Energy Vehicles and Power Batteries (CIBF2024 Chongqing), Jiang Hongdao, Deputy General Manager of Shenzhen Everbright Laser Technology Co., Ltd., shared with the delegates the development trend of lamination equipment and the achievements of Everbright Laser's process innovation.

01

Multi-piece Z-type has become one of the mainstream upgrade directions of stacking machine

　　At present, the mainstream lamination equipment routes in the market include: single-chip Z-type stacking machine, multi-piece Z-type stacking machine, thermal composite stacking machine, etc.

　　From the perspective of the potential for improving the stacking speed, Jiang Hongdao pointed out that the stacking speed of the current single-piece Z-type stacking machine is easy to reach the limit, mainly because the more stations, the more likely the pole piece is to deviate. In his opinion, it is difficult to increase production efficiency by increasing the number of stacking tables. The stacking efficiency of the thermal composite stacking machine is limited by thermal lamination, etc., and is also approaching the limit.

　　The multi-cell Z-type stacking machine launched by Everbright Laser adopts the method of increasing the number of stacks at one time (2-N pieces), and while the number of stacks increases, its core performance, production efficiency and equipment cost performance have been greatly improved, and the production cost has been reduced. Among them, the improvement of its core performance is mainly manifested in:

　　First, the efficiency of positive and negative die-cutting is improved

　　In the production process, it can be matched with multi-station multi-piece stack or single-station multi-piece stack according to different pole piece sizes. Compared with the single-piece stacking equipment, the multi-piece Z-type stacking machine reduces the number of die-cutting pauses and doubles the die-cutting efficiency.

　　Second, the conveying deviation of the pole piece is reduced, and the deviation correction is high-precision and reliable

　　According to the stacking table matching, its vacuum belt continuously conveys multiple pole pieces to each piece taking position; The vacuum belt vacuum chamber can be adjusted in multiple segments, thus reducing the chance of large deviations of the pole pieces during the conveying process. At the same time, the high precision of pole piece correction is improved through the independent deviation correction function of multiple pole pieces; Moreover, multiple pole pieces are independently monitored by vacuum to ensure the reliability of electrode adsorption.

　　The third is the lamination platform to improve the stacking efficiency

　　Everbright Laser's multi-piece Z-type stacking machine realizes the simultaneous stacking of multiple pole pieces, which greatly improves the stacking efficiency. It should be mentioned that the pressure of the compressor is individually adjustable, which can effectively prevent the crushing of the pole piece; The first layer of the diaphragm is independently corrected, which ensures the accuracy of the first layer of diaphragm lamination.

　　Fourth, the laminating efficiency and stability are improved

　　The method of simultaneous lamination of multiple pole pieces is adopted, which improves the laminating efficiency of the multi-piece Z-type stacking machine. At the same time, by increasing the distance of the uniform speed section of the lamination, the stability and reliability of the lamination are improved.

　　Fifth, two kinds of diaphragm slitting meet the different needs of the downstream

　　According to reports, the polar group of the equipment is pressed and slitted with the spacer film, which can ensure that the slitting edge of the diaphragm is neat; And the pressure of the pole group pressing mechanism is adjustable to ensure the slitting effect; At the same time, according to the different separator materials and process differences, two separator slitting methods are provided such as hot cutting and cold cutting.

　　In addition, in the links of sheet taking, pole group transfer, glue sticking, hot pressing, etc., the multi-piece Z-type stacking machine has been optimized and upgraded to further meet the actual requirements of customers.

02

Everbright Laser maximizes energy-efficient manufacturing and cost reduction of lithium batteries

　　Jiang Hongdao pointed out, "Aiming at the goal of improving the stacking efficiency, the single-chip Z-type stacking machine and the thermal composite stacking machine are almost all approaching the limit, while Everbright Laser's multi-chip Z-type stacking machine can stack three or five pole pieces on each stacking table mainly through the combination of stacking tables, so as to give full play to the production efficiency of the equipment more efficiently." ”

　　In terms of lamination efficiency, the stacking efficiency of Everbright Laser's fourth-generation multi-cell Z-stacking machine can reach 0.06-0.16s/pes for pole pieces of different sizes.

　　例如：115×550mm极片，叠片速度≤0.1s/pcs; 115×350mm极片，叠片速度≤0.08s/pcs; 100×256mm极片，叠片速度≤0.06s/pcs; 169×184mm极片，叠片速度≤0.08s/pcs; 340×184mm极片，叠片速度≤0.14s/pcs。

　　Not only that, "this group of equipment can also perform cold or hot cutting of the diaphragm, depending on the diaphragm; The equipment operation and material replacement positions are all at the edge of the equipment, which is convenient for equipment operation and maintenance and material replacement, and improves the equipment utilization rate; The number of equipment in the whole line is small, the staffing is reduced, and the operating cost is reduced. Jiang Hongdao added.

　　It is worth mentioning that, in response to the specific requirements of customers, Everbright Laser also innovates process integration. For example, the integration of laser cutting and lamination can reduce the roller of the pole piece compared with the traditional mode compared with the traditional mode for application scenarios such as high tabs, thereby reducing the occurrence of tab folding. The static cutting and dynamic cutting modes can be switched freely, which can improve the accuracy of lamination and tabs; Reduced footprint, reduced energy consumption, and fewer operators.

　　In the view of battery China, lithium battery equipment companies are currently mostly improving the quality and efficiency of equipment as one of the main ways to reduce the cost of equipment. At the lithium battery manufacturing end, the quality improvement and efficiency increase of the production line have a long periodicity, and the efficiency improvement brought by the upgrading and transformation of the laminated production line process will gradually appear. With the large-scale application of energy-efficient and cost-effective multi-piece Z-type stacking machines, it may help downstream enterprises to reduce costs to the extreme.

　　It is understood that Everbright Laser has long focused on the update and iteration of core technologies. Focusing on the goals of improving quality, increasing efficiency and reducing costs, behind the continuous upgrading of its stacking machine solutions, including die-cutting mechanism, stacking table, film taking manipulator, deviation correction table, laminating mechanism, hot pressing mechanism, glue sticking mechanism and other core mechanical components have been innovated and upgraded, and through the integration with laser cutting, the high-energy efficiency manufacturing of lithium battery has been further maximized.

　　In terms of products, Everbright Laser has been committed to the middle and rear end of lithium battery equipment, mainly laser tab cutting, lamination, assembly, as well as modules and PACK lines.

　　Among them, Everbright Laser's high-speed laser tab cutting machine has a cutting speed of up to 120m/min and a burr ≤ 15μm; The efficiency of the all-in-one cutting and stacking machine is 300-1000ppm, and the energy efficiency is high and cost-effective; The cell assembly line has an early layout in the industry, and its square cell assembly efficiency is 12-40ppm, which is at the leading level in the industry; The module/PACK production line has high efficiency and high product yield.

　　According to Jiang Hongdao, after years of technological research, the efficiency of Everbright Laser's large cylindrical assembly line can reach 60-150ppm, and the structure forms include the traditional linear type and the new high-speed line with continuous operation mode.

　　Low cost, high safety, high energy density, long cycle life and other products with excellent comprehensive performance have become the focus of a new round of competition in the lithium battery industry, and the new laser technology lamination equipment may become a major engine to help the lithium battery production line achieve extreme manufacturing, reduce costs and increase efficiency.