Why You Need BMS For Lithium Ion Battery?（2）

From the previous article, we know the basics of lithium-ion battery BMS. In this article, we will mainly explain the BMS balance function.

• Why we need a balance function: Due to the limitations of the production process, it is impossible to achieve complete consistency in the voltage and internal resistance of each cell. When used in series, the cell with high internal resistance is first discharged and then fully charged. For a long time, the difference between the capacity and voltage of each cell becomes obvious.
  
  

• The balance function: to keep each cell voltage consistent, maximize the discharge capacity, and extend the service life of the battery pack.

• At present, there are two general types of balance methods. One is energy consumption, and the other is energy transfer.