An improved reconfigurable equalization circuit was proposed to solve the problem of battery voltage inconsistency caused by voltage drop after constant current charging. During the charging process of the battery pack, the improved reconfigurable equalization circuit can be equivalent to the traditional reconfigurable circuit, which controls the charging status of each battery through the reconfigurable circuit to achieve equalization during charging. After charging was completed and a certain period elapses, the Buck-Boost circuit in the improved reconfigurable circuit was used for rebalancing. The improved reconfigurable circuit can rebalance the battery pack voltage inconsistency caused by voltage drop while ensuring charging balance. Finally, a physical platform was built to verify the performance of the improved reconfigurable equalization circuit and compared it with the traditional reconfigurable circuit. The experimental results show that the equalization circuit has good performance.