What are the requirements and precautions for the processing and design of lithium battery casings

Lithium battery shell design can be divided into: PVC heat sealing, plastic, metal. Lithium battery shell.pngPVC heat-sealing: What kind of shell encapsulation is used for the exterior of the lithium battery pack depends on the detailed requirements of the customer's product. Regarding the packaging form using PVC heat-sealing, it is generally suitable for a small number of battery cells in series and parallel. , It can be used when the overall weight is lighter (≤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. After the different lithium battery packs are finalized, the shell involved may have to be molded. The mold 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. Different requirements on the material and process of the shell 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 not large, 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 special materials is required. The cost of lithium batteries is mainly composed of batteries, PCM, and structural parts, plus the company's PACK costs, aging costs, and management costs. At the same time, due to the different requirements of product technical difficulty, purchase amount, and defective rate, the price of lithium batteries will vary greatly! Considerations for the design of lithium battery casing 1. Pole piece connection: It is recommended to use ultrasonic or spot welding welding method. The design of the lithium battery casing should make the pole piece free from external force. 2. The soldering time cannot exceed 3 seconds, and the number of times cannot exceed 5 times. The next soldering can only be performed after the pole pieces are cooled. 3. It is strictly forbidden to heat the battery core directly, it will damage the battery if the temperature is higher than 100℃. 4. Fixation of the lithium battery: the side with the largest area of u200bu200bthe battery should be fixed on the shell, and the battery should not be loose after installation. 5. Shell toughness: The lithium battery shell should have enough mechanical strength to protect the battery from mechanical impact. 6. The welding temperature of ferrochrome must be controlled and anti-static, and the temperature cannot exceed 350°C. 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 post: What is the difference between polymer lithium battery and lithium manganate battery