In discharging stage some cells in the battery module might reach over discharged state earlier than the other cells in the module. When any cell reaches over discharged state, the battery module is required to stop supplying power to protect the over discharged cell even though other cells are not exhausted. This study utilizes the globally active balance module as shown in Fig. 4 and an additional 24V battery as balance power supply. In Fig. 4, periphery power supply is used to balance cell voltages during discharging stage. When the voltage measurement system detects low voltage cell with large cell imbalance, the same globally active balance module used in the charging stage converts power in the periphery battery to the weak cell. As indicated in Fig. 4, when the battery module is discharging at I, the weak cell is discharging at I - IB, where IB is from the balance module. The weak cell discharges less current than the other cells in the series with the implementation of discharging balance proposed in the current study. By utilizing discharging balance with balance power from external source could effectively extend the battery range without being cut off with only one cell reaching low voltage limit and full potential of the battery module could be utilized.