System, method and mobile terminal for sharing battery between mobile terminals

A method for sharing a battery between mobile terminals, comprising the steps of:

• a mobile terminal of a power supply end supplying power to a mobile terminal of a power utilization end through a circuit interface of the power utilization end;
• and
• the mobile terminal of the power utilization end opening a power supply circuit of the battery of the power utilization end in the mobile terminal of the power utilization end and closing a power supply circuit of the circuit interface of the power utilization end at the same time, thus enabling the mobile terminal of the power supply end to supply power to the mobile terminal of the power utilization end;
• wherein a charging control unit of the power utilization end performing charging control to the battery of the power utilization end;
• a charging and power supply mode control subunit controlling whether the mobile terminal of the power supply end charges the battery of the power utilization end when the mobile terminal of the power supply end supplies power to the mobile terminal of the power utilization end;
• and
• an electricity quantity detection switch subunit controlling an electricity quantity detection subunit to detect an electricity quantity of the battery of the power supply end.

A mobile terminal, comprising a battery of a power utilization end, a power management unit coupled with the battery of the power utilization end, wherein the power management unit comprises a power supply switch subunit, and the mobile terminal further comprises a circuit interface of the power utilization end and a power supply control unit of the power utilization end;

• wherein,
• the circuit interface of the power utilization end is configured to couple with an external power supply device;
• the power supply switch subunit, coupled with the circuit interface of the power utilization end, the battery of the power utilization end and the power supply control unit of the power utilization end respectively, is configured to control the circuit interface of the power utilization end or the battery of the power utilization end to couple with the power supply control unit of the power utilization end;
• and
• the power supply control unit of the power utilization end is configured to supply power to the mobile terminal;
• wherein the power management unit further comprises a charging and power supply mode control subunit and an electricity quantity detection switch subunit sequentially coupled between the circuit interface of the power utilization end and the power supply switch subunit in series and an electricity quantity detection subunit coupled with the electricity quantity detection switch subunit;
• the mobile terminal further comprises a charging control unit of the power utilization end coupled with the battery of the power utilization end;
• wherein,
• the charging control unit of the power utilization end is configured to perform charging control to the battery of the power utilization end;
• the charging and power supply mode control subunit, coupled with the charging control unit of the power utilization end, is configured to control whether the external power supply device charges the battery of the power utilization end when the external power supply device supplies power to the mobile terminal of the power utilization end;
• and
• the electricity quantity detection switch subunit is configured to control the electricity quantity detection subunit to detect an electricity quantity of the battery of the power utilization end or an electricity quantity of a battery of the external power supply device.