What are the processes in the cell processing section of the module pack production line?

The process of the cell processing section of the module pack production line does include automatic cell loading and cell scanning, cell OCV testing and polarity detection flipping, cell gluing, and cell stacking. The following are these process steps Detailed introduction:

Automatic battery loading and battery scanning

Automatic battery loading: The operator first confirms the model, quantity and location of the required battery cells, and prepares the necessary transportation tools. Then, according to the needs of the production line, the cells are transported from the storage area to the designated position on the production line one by one. For large or heavy batteries, operators need to use appropriate handling tools to ensure the safety and efficiency of the handling process.

Battery cell code scanning: The automatic code scanning station is responsible for reading the QR code or barcode information on the battery cells and entering the data into the system to provide data support for subsequent processes. High-precision scanning technology is used to ensure that battery cell information can be read quickly and accurately. The read data is directly stored in the system database to facilitate subsequent quality traceability and batch management. At the same time, the device has cell polarity foolproof detection and repeated code foolproof functions to ensure the accuracy of the information.

Cell OCV test and polarity detection flip

Cell OCV test: Use a high-precision voltage tester to measure the open circuit voltage (OCV) of the cell to evaluate the performance of the cell. This voltage value reflects the electromotive force inside the battery and is an important basic data for evaluating battery performance. By measuring the OCV of the battery cell, you can initially evaluate the battery's health, charge and discharge status, remaining capacity and other information.

Polarity detection and reversal: During the battery manufacturing, testing or maintenance process, the positive and negative polarities of the battery are detected and flipped when necessary to ensure that the positive and negative poles of the battery are connected correctly. Incorrect polarity may cause damage to the battery module, degrade performance, or even cause safety accidents. Therefore, battery polarity detection reversal is crucial to ensure the quality and safety of battery modules.

Battery core adhesive

Gluing is an indispensable process in the assembly process of lithium batteries. Its main function is to fix the shape of the battery core and improve the safety performance of the battery. The common location for gluing is the side of the battery core. The quality, location and size of the tape will affect the thickness and safety of the battery. Therefore, it is necessary to select the appropriate tape and strictly follow the process requirements for the adhesive tape application.

Cell stacking

The cell stacking process is one of the core steps in the cell processing section. The stacking process is usually carried out using a high-precision and reliable stacking robot arm to ensure that the relative position between cells is stable. When stacking, the cells need to be placed in a specific arrangement and fixed with separators and end plates. After the stacking is completed, processes such as welding and heat treatment are required to ensure the reliability and stability of the cell stack.

To sum up, the process of the cell processing section of the module pack production line involves multiple links, and each link has its own specific process requirements and technical difficulties. By strictly controlling these process steps, we can ensure that the quality of the battery cells meets the standards and lay a solid foundation for subsequent welding, assembly and testing processes.