Analysis of the key points of the common PACK process of 18650 lithium batteries

Multi-parallel and multi-string 18650 lithium battery pack design process skills 1. Adopt the principle of priority and easy operation, that is, easy operation by employees. 2. The principle of prioritizing operation safety is adopted, that is, employees are not easy to short-circuit or have better preventive measures during operation. 3. Adopt the equipment principle, that is, try not to use manual labor as much as possible with auxiliary equipment, at least semi-automatically. 4. The packaging design should be reasonable, easy to take and put, and don't leave the product to the customer for a long time. 18650 lithium battery pack process quality characteristics 1. Adopt quality lithium batteries, qualified and stable suppliers to supply good performance single cells, the single cells go through a series of safety detection and performance detection, and use them after being qualified. 2. Low internal resistance and good consistency of the battery are required. Whether 14.8V lithium battery packs or other energy storage battery packs, low internal resistance must be ensured to ensure high-current discharge capacity, platform, heat dissipation, etc. 3. The battery structure adopts a ventilated design, and the distance between two adjacent batteries is not less than 2mm. This structure requires the battery to be fixed with a plastic bracket. 4. The PACK battery factory uses slotted nickel sheets for spot welding. The size of the nickel sheets meets the requirements of high-current discharge. The nickel sheet material guarantees low internal resistance. The spot welder guarantees stable operation. The welding needle guarantees the quality. The operator is trained and qualified. After the job operation, test whether the solder joints are firm after spot welding. In addition, vibration tests are done for each batch of products to verify the anti-vibration performance. 5. Different batches of batteries are made into typical finished products and subjected to life tests. When the relevant experience of the lithium battery PACK design specification is summarized, the actual cycle life of the finished battery is obtained by cycle detection. 6. Verify the high and low temperature performance of the battery. The cells of different PACK lithium battery manufacturers are made into finished products and tested at different rates of discharge at high and low temperatures to obtain the actual discharge curve. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.