Alternating current and direct current composite charging method and system based on ChaoJi charging interface

The invention discloses an alternating current and direct current composite charging method and system based on a ChaoJi charging interface. The method comprises the following steps that S1, a to-be-charged vehicle, charging equipment and a ChaoJi charging interface are obtained, a control guide circuit and a power supply loop are arranged in the to-be-charged vehicle, and an alternating current and direct current detection circuit and an alternating current and direct current switching circuit are arranged in the power supply loop; s2, connecting charging equipment with a to-be-charged vehicle by using a ChaoJi charging interface, and if the connection voltage is not within a standard range, stopping operation; otherwise, entering the step S3; s3, if no pulse signal is detected within a certain time, switching to the direct current guide circuit; otherwise, switching to the alternating current guide circuit; s4, the to-be-charged vehicle is prepared before charging, and the charging equipment starts to outpu