Power management device and management method thereof

A power management method, adapted for execution by a power management device, the method comprising:

• receiving, by a switch of the power management device, an external power;
• providing, by a charging circuit of the power management device, an internal power to charge a battery of the power management device;
• receiving, by a detection circuit of the power management device, an internal power and at least one operation power;
• determining, by the detection circuit, whether at least one of an internal power and at least one operation power is in a preset specification range;
• generating, by the detection circuit, a protection activate signal in response to having determined that at least one of the internal power and the at least one operation power is outside the preset specification range, wherein the detection circuit is configured to simultaneously determine whether the internal power and the at least one operation power are within the preset specification range;
• setting, by a controller of the power management device, a protection flag according to the protection activate signal;
• executing, by the controller, an application program to generate a control signal in response to setting of the protection flag;
• determining, by the controller, whether a system, to which the power management device belongs, is in use;
• in a case where the system is determined to be in use, initiating, by the controller, a shutdown procedure to shut down the system;
• transmitting, by the controller, the control signal to turn off the switch and stop receiving the external power;
• instructing, by the controller, the battery to enter a shipping mode, based on the protection activate flag being set, by stopping the charging and discharging of the battery;
• receiving, by the controller, a trigger signal different from the protection activate signal;
• and
• removing, by the controller, the protection flag when the trigger signal is enabled for longer than a predetermined time period.