Control method of swappable battery pack set applied to electric vehicle

1. A control method for a swappable battery pack set of electric vehicles (EVs), wherein each of the EVs has a main battery pack set and at least one swappable battery pack set, which is integrated with a switched-mode DC-to-DC power converter, simultaneously, comprising:

uninstalling the swappable battery pack set from a first EV;

executing a charge unlocking process to the swappable battery pack set to allow the change of a using restriction;

charging the swappable battery pack set after executing the charge unlocking process;

inputting the using restriction to a control unit of the swappable battery pack set;

executing a charge locking process to the swappable battery pack set to disable the change of the using restriction; and

installing the swappable battery pack set into a second EV,

wherein the swappable battery pack set being discharged to the main battery pack set of the second EV through the switched-mode DC-to-DC power converter or charged from the second EV through the switched-mode DC-to-DC power converter according to the using restriction.

2. The control method defined in claim 1 , wherein the using restriction comprises a charging time restriction, a charging power restriction or a charging count restriction.

3. The control method defined in claim 1 , wherein when the swappable battery pack set is charged before the charge unlocking process, the processes comprise the following:

transmitting a feedback signal to the control unit by a feedback unit;

comparing the using restriction with the feedback signal by the control unit; and

generating an interrupt signal by the control unit if the feedback signal satisfies the using restriction.

4. The control method defined in claim 3 , wherein the interrupt signal is transmitted to a switched-mode DC-to-DC power converter.

5. The control method defined in claim 1 , wherein when the swappable battery pack is charged before the charge unlocking Process, the processes comprise the following:

comparing a clock signal with the using restriction by the control unit; and

generating an interruptive signal by the control unit if the clock signal satisfies the using restriction.

6. The control method defined in claim 5 , wherein the interrupt signal is transmitted to the switched-mode DC-to-DC power converter.

7. The control method defined in claim 1 , wherein following actions are included after the swappable battery pack set is installed to the second EV, the processes comprise the following:

transmitting the using restriction to the EV from the swappable battery pack set; and

providing an electrical power to the EV according to the using restriction by the swappable battery pack set.

8. The control method defined in claim 1 , further comprises:

restricting a charging and discharging current through the switched-mode DC-to-DC power converter of the swappable battery pack set according to a predetermined performance restriction.

9. The control method defined in claim 8 , wherein the swappable battery pack set is charged and discharged according to the predetermined performance-restriction, through the switched-mode DC-to-DC power converter integrated in the swappable battery pack set.

10. The control method defined in claim 1 , wherein the charge locking process or the charging unlocking process is executed by a mechanical structure.

11. The control method defined in claim 1 , wherein the charge locking process or the charging unlocking process is executed by the method of a software verification and/or a hardware verification.