瑞典采购需求：电池管理系统、BMS电池、BMS模块、锂BMS、BMS锂电池、Lifepo4 BMS

I need assistance regarding an issue with one of the battery management systems. It appears that the unit is not balancing correctly, as I've observed a voltage discrepancy of 0.44 volts between the minimum and maximum levels. This issue has persisted since the initial setup. Can you provide guidance on how to resolve this problem? Additionally, any information on potential replacements or repairs would be greatly appreciated. Looking forward to your prompt response, as this is affecting our operations. Thank you!