What are the structural characteristics of cylindrical lithium batteries?

Structural characteristics of cylindrical lithium batteries Cylindrical lithium batteries are divided into lithium cobalt oxide, lithium manganese oxide, and ternary data. The three data system batteries have different advantages. It is widely used in notebook computers, digital cameras, lighting, toy products, power tools, portable energy and other fields. What are the structural characteristics of cylindrical lithium batteries? The following is an analysis by the technicians that cylindrical batteries are a common battery structure. Metal hydride nickel batteries and lithium batteries are cylindrical structures, and newly developed power lead-acid batteries are also cylindrical structures. Cylindrical batteries have been standardized, from the smallest 0.1ahAAAA cylindrical battery to the higher capacity about 10Ahm battery, forming an internationally consistent series of specifications. 1. Cylindrical battery structure (1) Generally, cylindrical batteries are used. The structure of the cylindrical battery is shown in Figure 3-4. The cylindrical battery consists of a casing, a cap, a positive electrode, a negative electrode, a potential barrier, and an electrolyte. Generally speaking, the battery case is the negative electrode of the battery, the cover is the positive electrode of the battery, and the battery case is made of nickel-plated steel plate. (2) The important difference of the power cylindrical battery is the conductive connection structure of the battery, because the power lithium-ion battery generally uses a relatively large current, it is necessary to specially plan the large current structure. In order to facilitate the combination connection, a special connection combination device is designed on the basis of the original cylindrical battery structure. For example, internal threads or studs are designed on both the positive and negative electrodes of the battery to improve conductivity. 2. Features and advantages of cylindrical batteries: Cylindrical batteries have formed a series of internationally consistent specifications and models, and the technology is relatively mature, suitable for continuous processing in large quantities. The cylinder has a large specific surface area and good heat dissipation performance. (3) Cylindrical batteries are generally sealed batteries, and there is no protection device during use. (4) High-voltage battery shell, there will be no battery swelling phenomena such as square, flexible packaging, etc. during use. Disadvantages: The batteries are connected in series, usually by spot welding, laser welding, etc. Generally speaking, cylindrical batteries have limited conductivity, so they can be reprogrammed to meet the battery's conductivity requirements, including the conductivity requirements inside and between electric vehicle batteries. It is not suitable for large-capacity batteries. To manufacture large-capacity batteries must be connected in parallel. Parallel technology is complicated and the combination cost is high. Cylindrical batteries generally have higher pressure resistance. For example, the traditional Ni-MH d-type battery has a safety valve opening pressure of 1 to 3 MPa. Therefore, when the battery has safety problems, the possibility of explosion is greater. (4) Using cylindrical batteries to make battery packs, the capacity will be larger. 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: Influencing factors and optimization of lithium battery dispersion