Detection circuit of charging and discharging integrated gun

The utility model discloses a detection circuit of a charging and discharging integrated gun. The detection circuit comprises an input voltage detection zero-crossing switch and an output voltage detection zero-crossing switch. The input voltage detection zero-crossing switch is arranged between the L end and the N end; the output voltage detection zero-crossing switch is arranged between the Lout end and the Nout end; the input voltage detection zero-crossing switch is connected with the MCU module and transmits detected first voltage signals of an L end and an N end to the MCU module; the output voltage detection zero-crossing switch is connected with the MCU module and transmits detected second voltage signals of the Lout end and the Nout end to the MCU module. According to the utility model, zero-crossing monitoring of a charging mode and a discharging mode can be realized, detection and identification of the charging mode and the discharging mode can be realized, voltage safety of respective output sourc