Abstract: Taking CLLC resonant DAB topology as an example, through the analysis of the working mechanism of this type of topology, this paper designs a method that can effectively reduce the difficulty of ZVS (Zero Voltage Switch) implementation in the full load range of this type of topology caused by the stray parameter of control circuit and the deviation of the driving signal. The adjustable drive board included in the method is designed with a potentiometer Radj. Through Radj, the resistance value between GND and the MOD pin of the drive core can be accurately adjusted, that is, the dead time of the IGBT module can be accurately adjusted. Further, the module pulse alignment test circuit can align the drive pulses of IGBT half bridges on both sides of dotted terminal of isolating transformer, and reduce the deviation caused by dead time jitter by centering the jitter, realize ZVS operation under full load range and improve the working efficiency of resonant DAB topology.