What are the ways to pack 18650 lithium batteries

Serial composition: The battery is formed by a single battery through and in series. The new capacity is added in parallel, and the voltage remains the same. After series connection, the voltage doubles and the capacity remains unchanged. For example, a 3.6V/10Ah battery is composed of a single N18650/2Ah through 5 parallels. Parallel first and then series: The battery cycle life after paralleling is affected by the difference of internal resistance and uneven heat dissipation. But a single battery failure will automatically exit, except for the reduction of capacity, it will not affect the use after parallel operation, and the parallel process is more stringent. When the unit batteries connected in parallel are short-circuited, the current in the parallel circuit is very large, which is usually guarded by adding fuse protection technology. First in series, then: according to the capacity of the entire group of batteries, such as one-third of the capacity of the entire group, and finally in parallel to reduce the probability of failure of large-capacity battery packs.. Battery requirements: select the corresponding batteries according to your own design requirements, parallel and series batteries The same model, model, capacity and internal resistance are required, and the voltage difference should not exceed 2%. Generally speaking, after batteries are connected in series and parallel, the capacity loss is 2%-5%. The more batteries, the greater the capacity loss. Whether it is a flexible battery or a cylindrical battery, you need multiple batteries. If the consistency is not good, it will affect the battery capacity. The battery with the lowest battery capacity determines the capacity of the entire battery. High current discharge performance is required. The starting current of the motor is 3 times of the normal working current, and high current discharge can improve the power performance of the motor. Let the battery dissipate better. More batteries, the temperature in the battery box rises, and it is not easy to disperse, resulting in uneven temperature between the batteries, different discharge characteristics, and long-term battery performance. High-level processing technology. The battery must be able to withstand the impact of bumpy roads. The processing technology is very demanding, especially the spot welding technology. Experiment after welding and beware of false welding and desoldering. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages of polymer batteries