How are lithium battery modules designed and processed?

Analysis of Lithium Battery Modules Lithium battery modules can be understood as the intermediate products of batteries and packs formed by combining lithium ion batteries in series and parallel with the addition of single battery monitoring and management devices. Its structure must support, fix and protect the cell, which can be summarized into three major items: mechanical strength, electrical performance, thermal performance and fault handling capability. Whether it is possible to fix the position of the battery cell and protect it from deformation that degrades its performance, how to meet the current-carrying performance requirements, how to meet the control of the cell temperature, whether it can be powered off in case of serious abnormalities, and whether it can prevent thermal runaway Dissemination, etc., will all be the criteria for judging the pros and cons of lithium battery modules. For high-performance lithium battery modules, the thermal management solutions have turned to liquid cooling or phase change materials. There are a lot of connecting wires inside the lithium battery pack, and there are too many manual welding steps, which can cause welding and assembly problems; too many parts make assembly difficult, high failure rate, and high cost. Lithium battery module design and processing process. The entire lithium battery module design process actually includes the goal of the entire module design, integrating the details of the module design, and a complete module design verification process, including the structure. , Electrical, cooling safety, etc., must be implemented in it. The first part is divided into several design levels to meet the demand characteristics of the vehicle equivalent of the product. It is mainly divided into structure, electrical design, thermal design, and safety. Sufficient compression force is given according to the requirements of the battery. This compression will also be discussed later. The entire battery Regardless of whether it is a soft case or a hard case, through a certain amount of addition, the expansion of the battery core can be effectively prevented, and a certain degree of support is provided in terms of life. There is also a fixation between the module and the tray in the whole lithium battery pack, and the module and the tray are effectively fixed through the pressure bar. The most important thing above is the sampling line inside, as well as to prevent the cell from moving inside. The whole cell is not serious in terms of heating under normal NETT conditions. We must also consider that there may be some extreme situations, that is, the user It may be at a high speed, which is equivalent to saying that the long-distance driving enters the fast charging state, and the continuous limit is met, and there may be a strong heat transfer requirement here. There is a strong connection between safety and the thermal insulation requirements of the cell in the module design. In the second part, the most important part of the manufacturing process is to change the battery cell from single unit to stacking to welding, sampling line layout, CMU layout, the entire process, equipment, distance, process assembly are required, this part must be related to the equipment, especially When it comes to volume, especially when it comes to automated production lines, there is a strong demand connection here. The third part, maintenance considerations. Because when we are doing it now, the first step is to make the product. Later, as the vehicle is used, the entire lithium battery module is repaired, especially the damage of the relevant sub-components. How to repair the module? Here we need to combine the manufacturing process and maintenance process, and there is less talk about it here. The fourth part, module echelon utilization. Generally speaking, we will design a block diagram of the module after we sort out the requirements for lithium battery packs. It is important to connect all parts, including electrical aspects, structural aspects, vehicle coupling aspects, and mechanical fixing aspects. Get up and enter all the requirements of the electrical structure into it, so that we can clarify the design goals of each part. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What are the correct charging methods for high-rate lithium iron phosphate batteries?