Lithium-ion battery case classification and requirements and design

Lithium-ion battery shell classification Li-ion battery shells are divided into three categories: steel shell lithium ion batteries, aluminum shell lithium ion batteries, and soft shell lithium ion batteries. Here is a brief description of the characteristics of these three types of battery shells. Lithium-ion battery shell.jpg 1. Steel shell lithium-ion battery Early angular lithium-ion batteries were mostly steel shells, which were mostly used for mobile phone batteries. Later, due to the low weight ratio of steel shells and poor safety, they were gradually used by aluminum shells and soft-packaged lithium-ion batteries. Replaced. There are still some small factories using steel shells to make B-product mobile phone batteries and some low-value-added MP3 and MP4 batteries. However, among cylindrical lithium-ion batteries, there is another situation. Most manufacturers use steel as the battery shell material. Because of the physical stability of steel materials, the pressure resistance is much higher than that of aluminum shell materials. After the design structure is optimized, the safety device has been placed inside the battery core, and the safety of the steel shell cylindrical battery has reached a new level. Don’t you see that most of the current notebook computer battery cells use steel shells as the carrier of. 2. Aluminum shell lithium ion battery Because of its lighter weight and slightly better safety than steel shell lithium ion battery, aluminum shell lithium ion battery has become the main force of mobile phone batteries. Due to the high cost of mold-opening aluminum shells, there are fewer models, and the minimum order quantity requirements are high. Important models are concentrated in some common mobile phone battery models. 3. Soft-packaged lithium-ion battery Because of its light weight, low mold opening cost, and high safety, the soft-packaged lithium-ion battery is gradually expanding its market share. It is mainly used in digital products, and is now gradually developing into markets such as mobile phones, notebook computers, and power tools. It is foreseeable that in the next few years, the market share of flexible packaging lithium-ion batteries will continue to expand steadily, and the application range will be wider. Due to the outsourcing of aluminum-plastic film, the resistance to pressure is very weak. It is limited to the current technical and environmental restrictions of domestic packaging plants, which will cause bulging. The ratio is still relatively high. Requirements and design of lithium-ion battery shell PVC heat sealing: What kind of shell encapsulation type is used outside the lithium-ion battery pack depends on the specific needs of the customer's product. Regarding the packaging form using PVC heat sealing, it is generally suitable for electric cores. It can be used when the number of series and parallel is small and the overall weight is light (≤2kg). However, for battery packs with an overall weight of ≥1kg, a fixed bracket should be added between the cells, and a glass fiber board should be added to the periphery, and then PVC heat sealing should be used. Plastic: Plastic shell is used. The important thing is that after different battery packs are shaped, the shell involved may have to be moulded, and the mould cost is a large expense. If the product is not finalized in the early stage of development, you can use the prototype shell for proofing (prototype) The strength is not as good as the strength of the material after the mold is opened and shaped), and the material and process requirements of the shell are different, which will also affect the cost. Metal: The metal shell is also the same as the plastic shell. Before the product is finalized or the quantity demand is small, it is recommended to use sheet metal sample preparation. This is important because the sample preparation and delivery time is short. If the batch is large, it is also recommended to open the mold. With regard to the requirements of the waterproof level of the metal casing, the cost will also be greatly affected, and the cost will be higher if the metal casing of the special material is required. 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: How to extend the service life of mobile phone batteries?