Are you curious about how a battery is produced? How to judge whether the battery products produced by the factory are qualified? What kind of inspection is required before a battery leaves the factory?

This article will take you only 5 minutes to understand the whole process of YULI automatic battery production line and answer the above questions for you! YULI Energy has the world's first automated production line. Our efficiency is 40% higher and cut costs by an unbelievable 30%! Follow me to explore more!

YULI World 1^st Automatic Production Line Production Process

You can also visit our automated production line at this link : )

https://drive.google.com/file/d/1kflVLKoeOWA9uP2hLi9CEO8Rnnujay3u/view?usp=drive_link

The 1st process is Cell Loading, our robotic arm will automatically grab the cells and put them onto our automatic conveyor belt.

The 2nd process is Pole Column Cleaning, we will laser clean the pole column of the battery before welding, using MOPA laser to clean the end face of the pole column, the laser can make the surface dirt and dust quickly vaporize and evaporate, so as to achieve the purpose of surface cleaning.

The 3rd process is Sorting, this is the most important step to ensure the quality of our batteries, we will test the battery according to the OCV, DCIR, K value, capacity and other quality data to determine the results of the battery, according to the results of the levels, the battery will be differentiated, if the voltage and internal resistance of the same battery module is inconsistent or the difference is relatively large, then it will affect the service life of the entire battery pack. If the test results are not consistent, that battery cells will be transferred to this box.

Pic 1. YULI automatic cell sorting

The 4th process is Module Stacking, this is the first assembly station of Module Pack production, and the quality of stacking directly affects the quality of subsequent Busbar welding. Therefore, in this process, our workers will reconfirm that the alignment of the cell module is up to standard and the length of the module is consistent.

The 5th process is Module in Box, in this step, we will put the module into the box, and assemble the copper plate, wire harness and so on.

Pic 2. Part of YULI's automated production line

The 6th process is Polarity Detection & Addressing, when assembling the battery, we need to confirm the polarity of each pole, connect the external circuit correctly, ensure the accurate alignment of each component, this step ensures that each battery unit is connected with the correct polarity otherwise the battery will not work properly and may cause danger.

The 7th process is Welding of Busbar, in which we use a laser to weld the wiring of the battery module.

The 8th process is Post Weld Inspection, after the laser welding, we will inspect the battery module to see if there are any blown spots, craters, bumps, weld penetrations, cracks/cracks in the welds, and deviations in the weld dimensions.

Pic 3. Part of YULI's automated production line

The 9th process is Cleaning Inspection, after all the welding processes, we will use infrared light to detect the temperature distribution on the surface of the battery cell to evaluate its cleanliness.

The 10th process is Sampling Line Test, through which we check the values of Ipara, Iwork, Iblance, Ifuse and Ishort.

After passing the sampling line test, we will carry out Gluing, Install Protective Cover and other processes.

The 13th process is Insolation and Voltage Resistance Test, which is used to test whether the insulation ability of the product is qualified under transient high voltage.

Pic 4. YULI Laser Inspection Process

The 14th process is Install BMS, after our battery module passes the above tests, we will install the BMS.

After that, we will install the Wiring Harness and Components, after which the product will be fully assembled and rolled off the production line.

The 18th process is ATE Test (Automated Test Equipment), through which we will test whether the wiring connection between the BMS board and the battery cell is normal, the performance and stability of the power supply system, etc. The last process is Aging Test.

The last(19th) process is Aging Test, we will check 100% of the finished batteries, we use high temperature aging, the temperature is 45℃-50℃ aging for 1-3 days, and then leave it at room temperature. Only after reaching the standard can we pack them for our customers.

After the above 19 automatic procedures and 8 strict inspections, YULI Energy have greatly improved the battery yield rate, which is 99.4% in our automated production line compared to 94% in the traditional manual production method! In addition, we also provide online production monitoring service, which greatly reduces the sampling time for customers. Would you like to know more about our product line?