Charging device for standby power supply of wind power variable pitch system

The utility model discloses a charging device for a backup power supply of a wind power variable pitch system. The charging device is composed of a main body assembly and a charging assembly. The main body assembly comprises a hub control cabinet and a cabinet door, the cabinet door is tightly buckled above the hub control cabinet, the side edge of the hub control cabinet is provided with a charging interface, and the surface of the charging interface is provided with an input connector and two positioning interfaces; the charging assembly comprises a power plug, the bottom of the power plug is provided with a charging interface, and two ends of the power plug are respectively provided with a positioning connector. And the positioning joint can be locked with the positioning interface so as to fix the electric component. When the charging assembly is limited and locked, the phenomenon that the charging assembly is not fixed firmly and falls off when the fan operates is avoided, the charging assembly is conven