Charging Method and Related Device

A charge protection apparatus coupled to a charging cable comprising a power cable and a data cable, the charge protection apparatus comprising:

• a current detection circuit dispersed on the power cable and configured to detect an external charging current flowing through the power cable;
• a gating circuit disposed on the power cable and coupled to the current detection circuit, coupled for charging when the gating circuit comprises a closed state, and being decoupled from charging when the gating circuit comprises an open state;
• an input/output (I/O) interface coupled to the data cable;
• and
• a micro control unit (MCU) coupled to the current detection circuit, the gating circuit, and the I/O interface, the MCU being configured to send data using the I/O interface,
• the current detection circuit being further configured to transmit the external charging current to the MCU, and
• the MCU being further configured to:
• transmit the external charging current to a user terminal using the I/O interface to enable the user terminal to calculate a current difference between the external charging current and an internal charging current detected by the user terminal,
• determine, based on the current difference, whether to generate a circuit control command;
• receive the circuit control command from the user terminal;
• and
• control, according to the circuit control command, the gating circuit to be in the closed state or the open state.