Method and system for integrating a peripheral charge controller into a non-DC-isolated charging device

A method is provided for implementing electric-shock protection in a transformer-free AC charging device. The method includes supplying an input end of the AC charging device with alternating current from a charging socket, providing the output end of the AC charging device with direct current for charging a high-voltage battery, and using the peripheral charge controller for controlling the charging socket. The peripheral charge controller is arranged within a housing of the AC charging device.