An Improved Battery Equalizer Based on Current Curve Optimization

To improve the balancing speed of the automatic equalizer, this paper proposes an improved method based on current curve optimization. In addition to the basic structure, two parts are added. A current sensor is used to estimate the working condition. A bidirectional switch is added to each winding to adjust the equivalent resistance. The proposed method can improve the balancing speed. Meanwhile, the fault diagnosis can be achieved by the added sensor, which improves reliability and safety. The operation principles and constraint conditions are presented in this paper. Simulation results show that the proposed equalizer can achieve voltage balance with a faster balancing speed.