How to solve the problem of active balancing of lithium battery pack charging?

The solution to the active balancing method of lithium battery pack charging active balancing discards the passive balancing method of current consumption and changes it to the method of transmitting current. The device responsible for charge transfer is a power converter. This device enables the small batteries in the lithium battery pack to transfer charge regardless of whether they are being charged, discharged or idle, so that the small batteries can always maintain dynamic balance. Since the charge transfer efficiency of the active balancing method is extremely high, it can supply a higher balancing current, which means that this method has a stronger balancing ability when the lithium battery pack is charged, discharged and idle. 1. Strong fast charging ability: The active balance function can make the small batteries in the lithium battery pack reach equilibrium faster, so the safety of fast charging is higher, and it is suitable for higher current high-rate charging methods. 2. When idle: Even if each small battery has reached the equilibrium state during charging, due to the different temperature gradients, the internal temperature of some small batteries is higher, and the internal temperature of some small batteries is lower, which will make the inside of each small battery The leakage rate is different. The test data shows that the leakage rate doubles every time the battery rises by 10°C. The active balance function can ensure that the small batteries in the idle lithium battery pack are constantly rebalanced, which is beneficial to the power stored in the battery pack. It can be fully utilized, so that when the working capacity of the battery pack ends, the residual power of a single small lithium battery is minimized. 3. When discharging: There is no lithium battery pack with a discharge capacity of 100%. This is because the end of the working capacity of a group of lithium batteries is determined by a certain small lithium battery that is discharged first, and it cannot guarantee all small batteries. Lithium batteries can reach full capacity at the same time. On the contrary, there will be individual small lithium batteries that retain unused residual power. Through the active balance method, when the lithium battery pack is discharged, the internal large-capacity lithium battery will distribute the electric energy to the small-capacity lithium battery. Therefore, the small-capacity lithium battery can also be fully discharged, and there will be no residual electric energy in the battery pack. Left, the battery pack with active balancing function has a larger actual storage capacity (that is, it can release electric energy closer to the nominal capacity). 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: How to distinguish between lead-acid battery and lithium battery?