Electrode manufacturing equipment: Laying the foundation for battery performance

As the core component for energy storage in lithium batteries, the preparation accuracy of electrodes directly affects the energy density and cycle life of batteries. Electrode manufacturing equipment is the key to controlling this process. In the positive electrode material coating stage, high-precision coating machines control the movement of the coating head through servo motors, evenly applying the positive electrode slurry onto aluminum foil. The coating thickness error can be controlled within ±1 micron - a precision equivalent to 1/50 of the diameter of a human hair. Domestic equipment manufacturer Prolong Intelligent has developed a double-sided synchronous coating machine that not only increases the coating efficiency to 1.8 times that of traditional equipment but also adjusts the coating thickness in real time through an infrared online monitoring system, effectively avoiding battery capacity decline caused by uneven coating.

Rolling equipment is responsible for the "densification and shaping" process. After coating, the electrode sheets need to be rolled to the specified thickness by a rolling machine. This process must ensure that the electrode materials are closely combined while reserving reasonable pores for lithium ion migration. Yinheng Technology's intelligent rolling machine is equipped with a pressure feedback adjustment system that can automatically adjust the rolling pressure according to the characteristics of different electrode materials, keeping the density deviation of the electrode sheets within 2%, significantly improving the charging and discharging efficiency and cycle stability of lithium batteries. Industry data shows that electrode sheets produced by advanced rolling equipment can extend the cycle life of lithium batteries by more than 30%.

Cell assembly equipment: Ensuring battery safety and consistency

Cell assembly is the "precision assembly stage" of lithium battery production, covering key processes such as winding / stacking, packaging, and electrolyte injection. Each step requires precise operation by dedicated equipment. In the winding process, fully automatic winding machines wind the positive electrode, negative electrode, and separator into cells at a speed of 30-50 revolutions per minute, with a positioning accuracy of ±0.05 millimeters, ensuring that the positive and negative electrodes are perfectly aligned and avoiding short-circuit risks due to misalignment. Prolong Intelligent's multi-station winding machine also has a "defect recognition" function, which uses a machine vision system to detect scratches and impurities on the surface of the electrode sheets in real time. Once a problem is detected, the machine stops immediately, keeping the cell defect rate below 0.1%.

Electrolyte injection equipment is directly related to the safety and performance stability of lithium batteries. As the "bridge" for lithium ion transmission, the injection volume of the electrolyte needs to be precisely controlled - too much can lead to leakage, and too little can affect battery capacity. Xinzhoubang's vacuum injection machine uses "quantitative pressurization" technology to precisely inject the electrolyte into the cells in a vacuum environment, with an injection volume error of ±0.1 milliliters, while avoiding air entry into the cells and potential safety hazards. After a certain new energy vehicle battery manufacturer used this equipment, the cell leakage rate dropped from 0.5% to 0.03%, greatly enhancing the safety of the battery pack.

Testing and formation equipment: Screening high-quality products and activating battery performance

After lithium batteries are produced, they still need to undergo "strict tests" by testing and formation equipment to ensure product quality meets standards. Formation equipment activates the electrochemical performance of the cells through the first charge and discharge, forming a stable SEI film (solid electrolyte interface film), which is a key step in determining the life and safety of lithium batteries. 

Testing equipment acts as the "physical examination doctor" for lithium batteries, comprehensively evaluating indicators such as capacity, voltage, internal resistance, and safety performance. Lando's comprehensive testing equipment can complete the capacity and internal resistance tests of cells within 3 minutes and conduct safety tests such as needle puncture, compression, and thermal shock to screen out substandard products. After a certain energy storage battery enterprise introduced this equipment, it achieved 100% full inspection of lithium batteries and kept the defect rate at the factory below 0.05%, providing a strong guarantee for the safe operation of large-scale energy storage power stations. In addition, the detection equipment can also collect performance data of lithium batteries, providing data support for subsequent battery design optimization and promoting the continuous iteration of lithium battery technology.

Equipment Upgrade: Driving the Lithium Battery Industry towards High-Endization

With the continuous improvement of performance requirements for lithium batteries in the new energy industry, lithium battery manufacturing equipment is also constantly upgrading, moving towards "intelligence, high speed, and high precision". In terms of intelligence, equipment enterprises have introduced industrial internet technology, using sensors and data analysis platforms to monitor the operation status of equipment in real time, predict equipment failures and carry out maintenance in advance, increasing equipment utilization rates to over 95%. In terms of high speed, the production efficiency of the new generation of winding machines and coating machines has doubled compared to five years ago, helping lithium battery manufacturers achieve large-scale production and reducing the production cost of battery cells by 20% to 30%.

At the same time, the upgrade of manufacturing equipment has also driven breakthroughs in lithium battery technology. For example, to meet the production needs of solid-state lithium batteries, equipment enterprises have developed specialized equipment such as solid-state electrolyte coating machines and high-temperature sintering furnaces, laying the foundation for the industrialization of solid-state lithium batteries; to meet the production needs of large cylindrical batteries, fully automatic cylindrical battery assembly lines have achieved full-process automation from electrode sheet cutting to battery cell packaging, promoting a rapid increase in the production capacity of large cylindrical batteries. It can be said that every technological breakthrough in lithium battery manufacturing equipment provides important support for the upgrading of the lithium battery industry.