美国采购需求：电池管理系统，BMS电池，BMS模块，锂BMS，BMS锂电池，适用于Lifepo4的BMS

I recently set up a smart battery management system and noticed an issue with the voltage balance of the cells. Initially, before charging, the voltage difference was minimal, around 0.008V, which seemed acceptable. However, after charging, one of the cell groups showed a voltage of 4.177V, while the others ranged from 4.073V to 4.075V. This discrepancy is quite concerning and raises questions about the overall performance and safety of the system. Could you provide any insights or troubleshooting tips regarding this issue? I'm particularly interested in understanding whether this voltage imbalance is common and what steps I can take to remedy it. Any guidance on adjustments or potential solutions would be greatly appreciated, as I want to ensure optimal functionality and safety moving forward. Thanks for your help!