Power adapter, terminal, and method for processing impedance exception of charging loop

A terminal, comprising a battery and a charging interface, the terminal being configured to form a charging loop with a power adapter via the charging interface so as to charge the battery, and wherein, the terminal further comprises a detection unit, a communication unit and an anomaly handling unit,

• the detection unit is configured to detect an input voltage of the terminal from the power adapter when the power adapter charges the terminal;
• the communication unit is configured to send voltage indicative information to the power adapter, wherein the voltage indicative information indicates the input voltage of the terminal from the power adapter detected by the detection unit, and to receive charging protection indicative information from the power adapter if the power adapter determines based on a difference between an output voltage of the power adapter and the input voltage of the terminal from the power adapter that an impedance of the charging loop is abnormal;
• and
• the anomaly handling unit is configured to control the charging loop to enter into a protection state according to an indication of the charging protection indicative information;
• wherein, the indication of the charging protection indicative information is configured to indicate a protection state corresponding to a level of the impedance determined according to the difference.

A method for handling an impedance anomaly in a charging loop, comprising:

• receiving, by a power adapter, voltage indicative information from a terminal when the power adapter charges a battery, wherein the voltage indicative information indicates an input voltage of the terminal from the power adapter detected by the terminal;
• detecting, by the power adapter, an output voltage of the power adapter;
• and
• determining, by the power adapter according to a difference between the input voltage and the output voltage, whether an impedance of the charging loop is abnormal;
• and controlling, by the power adapter, the charging loop to enter into a protection state if the impedance of the charging loop is abnormal, comprising:
• determining, by the power adapter, a level of the impedance according to the difference;
• and
• controlling, by the power adapter according to the level of the impedance, the charging loop to enter into a protection state corresponding to the level.

A method for handling an impedance anomaly in a charging loop, comprising:

• detecting, by a terminal, an input voltage of the terminal from a power adapter when the power adapter charges the terminal;
• sending, by the terminal, voltage indicative information to the power adapter, wherein the voltage indicative information indicates the input voltage of the terminal from the power adapter detected by the terminal;
• receiving, by the terminal, charging protection indicative information from the power adapter if the power adapter determines based on a difference between an output voltage of the power adapter and the input voltage of the terminal from the power adapter received from the terminal that an impedance of the charging loop is abnormal;
• and
• controlling, by the terminal, the charging loop to enter into a protection state according to an indication of the charging protection indicative information;
• wherein, the indication of the charging protection indicative information is configured to indicate a protection state corresponding to a level of the impedance determined according to the difference.