Series switching control system for reusing retired battery packs

According to the retired battery pack recycling series switching control system provided by the invention, a first detection control circuit is used for detecting the voltage of a first battery pack PACK1 and controlling the on-off of a bypass control circuit and an NMOS tube Q13 according to a detection result; the second detection control circuit is used for detecting the voltage of the second battery pack PACK2 and controlling the on-off of the NMOS tube Q10 according to the detection result; the first electronic switch control circuit receives control signals of the first detection control circuit and the second detection control circuit and controls the first series electronic switch to be turned on and turned off. The second electronic switch control circuit is used for controlling the second series electronic switch to be turned on and turned off. The voltage of the decommissioned battery packs is detected in real time, whether the decommissioned battery packs are directly connected in series or connec