Since the development of the power battery industry, it has always pursued the use of materials as light as possible to obtain more energy for mobile vehicles in a limited space. The iterative upgrade of the cell structure is an important way for the development of current power battery companies.

Taking the blade battery as an example, the long cell structure uses the long and thin shape to improve the Z-direction utilization of the battery pack, and the heat dissipation is significantly improved, and it can be used as a structural part itself, superimposed with CTP technology, which can make the safety better. Lower cost and higher volumetric energy. However, although long cells can effectively reduce the application of structural components, at the same process level, the longer the cells are, the more the alignment, efficiency, and yield in the production process will be affected. The CTP process The difficulty will also be higher.

The high-efficiency group technology represented by long cells is the development trend of power batteries in the future. Therefore, equipment companies that solve the problems of large-scale manufacturing of long cells and CTP will be the first to enjoy the technological dividends of the new cycle of process iteration. Behind the innovation of the core structure, the most difficult thing is not the research and development of the battery itself, but whether it can achieve large-scale mass production with high yield rate.

Lyric Robot's innovative research and development focuses on long battery cell manufacturing pain points

Focusing on the pain points of long cell manufacturing, Lyric Robot has innovatively developed the long cell tab bending process and the long cell laser top cover welding technology; through all-round dust removal, the short circuit of the cell can be effectively prevented; the key coating mechanism is adopted for precise wrapping Batteries; different product structures use corresponding adhesive methods to solve the tearing of the tab adhesive from the root cause, greatly improve the quality rate of the whole line, reduce the failure rate, accumulate a lot of experience in mass production lines, and achieve high efficiency of the production line with high productivity.

Bending process of long cell tabs

Due to the large thickness of the incoming cell connecting piece, the bending of the connecting piece requires a large pressure, and the force-position feedback closed-loop control technology is used, and the tabs are easily broken during the working process by a single push. Based on this pain point, Lyric Robot innovatively adopts two forming and bending technology, step by step, and efficiently completes the bending process of the tab connecting piece while ensuring that the tab is not damaged. Among them, Lyric Robot developed and applied one-shot forming technology for the welding process of the tab cover plate, which reduces bending and makes the process flow more concise and efficient.

Long battery core laser top cover welding technology

The welding technology of the long cell top cover is different from the traditional cell top cover welding. It needs to rotate the cell to cooperate with the swing track of the welding head to complete the welding. Lyric Robot adopts a unique fastening method for complete fastening to avoid product displacement caused by the rotation of the turntable; and uses the depth visual inspection technology to accurately grasp the movement trajectory of the cell, the welding platform performs the difference compensation processing through the software, and cooperates with the welding head. Movement, aligning narrow welding, using rectangular closed-loop continuous welding, to achieve high-speed and precise welding of the top cover of the cell, with good continuity, and stable welding rate.

All-round dust removal technology to prevent short circuit of cells

The friction between welding and the mechanism causes dust to be generated in the production process of the battery cell. The uncontrolled dust can easily cause the battery cell to short-circuit and catch fire. Therefore, the production process of long battery cells has strict cleanliness requirements for workshop operations. Lyric Robot innovatively adopts the combination of internal and external dust removal: the internal use of AAF air filter cooperates with the dust removal system for ventilation and ventilation to clean the internal free dust and ensure the crystallization of the equipment. Strictly control the generation of dust externally, avoid the use of mechanisms and components with risk of dust generation, and set up dust supervision points for each section of the production line. And through the DOE design of key factors, combined with fluid analysis tools, 3D additive manufacturing and other methods, the optimal welding port dust removal scheme is obtained, and there is no dead angle dust removal in all directions.

Key coating mechanism, accurately wrapping the battery cell

For a long time, the blue film of the long cell has difficulties such as being easily deformed by pulling, and the coating is easy to form air bubbles. The coating mechanism has become a major problem in the assembly line of the long cell. In the coating process, Liyuanheng adopts the servo + C5-level linear module to drive the displacement and material preparation cycle for the coating part, and finally overcome the coating problem of long batteries and precisely wrap the batteries.

Long battery cell pole ear bending process

Lyric Ultrasonic Metal Welding Machine pioneered the "dual-control welding mode", equipped with powerful Lyric Sonic Workbench software, which effectively widens the parameter adjustment process window, reduces false welding and over-welding, and innovatively increases the data monitoring of the degree of deformation of the tabs after welding. ;Through the two major processes of "constant pressure-triggered ultrasound and microsecond ultra-fast reading speed", it is the first time in the industry to detect the difference in thickness of 2-layer copper foil or 1-layer aluminum foil, effectively identifying multi-layer, few-layer, inner Solving problems such as folds and wrinkles, and solves the welding problem of connecting tabs, tabs and connecting pieces/adapters.

Maglev intelligent logistics

The traditional double-speed chain and drum logistics have a single movement mode, complex process design, discrete control, additional sensor elements for running status monitoring, control and composition tracking, single production tact, unable to adapt to sudden changes in the machine state, low product qualification rate, energy The consumption is large and the operation process is complicated. Based on this, Lyric Robotics Maglev (ICT) intelligent logistics uses magnetic levitation control to control the conveying trajectory and running rhythm. The modular electrical control system enables real-time transmission of equipment information, and the production efficiency is adjusted in real time according to the conditions of the machine. Built-in anti-collision, to achieve Lithium battery cells are transported without impact, ensuring product quality, low energy consumption, and flexible and intelligent operation processes.

Lyric Robot's strong technical heritage, development creativity, ability to capture pain points, and ability to iteratively update new products support its continuous in-depth and breakthrough in innovative products. The butterfly change in its technical process reflects the high safety and quality of power batteries. , the core requirement of low cost, as Lyric Robot's ability to capture opportunities becomes stronger and stronger, the imagination space in the power battery equipment market will also be even greater.