Power supply unit for aerosol inhaler, and control method and control program of the same

1. A power supply unit for an aerosol inhaler, the power supply unit comprising:

a power supply configured to discharge power to a load for generating an aerosol from an aerosol source;

a sensor configured to output a value related to a remaining amount of the power supply; and

circuitry configured to

determine that a request for aerosol generation has been received;

detect, in response to determining that the request for aerosol has been received and before generating the aerosol, whether there is a short circuit of the power supply based on a relationship between a first output value and a second output value, wherein the first output value is an output value of the sensor obtained prior to discharging, and the second output value is an output value of the sensor obtained after the discharging; and

perform control to discharge power from the power supply to the load to generate the aerosol only when no short circuit of the power supply is detected, wherein

in a case that the short circuit is detected, the circuitry is configured to

detect that the type of short circuit is an internal short circuit in a case that a difference between the first output value and the second output value is greater than a threshold; and

detect that the type of short circuit is an external short circuit in a case that the difference between the first output value and the second output value is less than the threshold.

2. The power supply unit of claim 1 , wherein

the discharging is discharging to another load different from the load for generating the aerosol from the aerosol source.

3. The power supply unit of claim 1 , wherein

the discharging is discharging for aerosol generation to the load.

4. The power supply unit of claim 1 , wherein

the threshold corresponds to an amount of change of the value related to the remaining amount of the power supply and attributable to the discharging.

5. The power supply unit of claim 1 , wherein

the value related to the remaining amount of the power supply is a voltage of the power supply, and

the first output value and the second output value are open circuit voltages of the power supply.

6. The power supply unit of claim 1 , wherein

the value related to the remaining amount of the power supply is a voltage of the power supply, and

the first output value and the second output value are closed circuit voltages of the power supply.

7. The power supply unit of claim 1 , further comprising:

a connection interface, wherein

the power supply unit is configured to be detachably connected to the load via the connection interface.

8. The power supply unit of claim 1 , further comprising:

a charger configured to charge the power supply in a case that external power is supplied to the power supply unit.

9. The power supply unit of claim 4 , wherein

the remaining amount of power of the power supply corresponds to a voltage value of the power supply detected by the sensor, and

the threshold is set based on a difference between a theoretical drop in a detected voltage of the power supply before and after discharging in a case that power supply is fully charged.

10. The power supply unit of claim 4 , wherein

the remaining amount of power of the power supply corresponds to a voltage value of the power supply detected by the sensor, and

the circuitry is configured to dynamically modify the threshold based on a detected deterioration state of the battery.

11. The power supply unit of claim 4 , wherein the circuitry is configured to:

estimate a state of health of the power supply based on a cumulative discharge amount of the power supply; and

set the threshold based on the estimated state of the health of the power supply.

12. The power supply unit of claim 11 , further comprising:

a memory configured to store a correspondence between a plurality of estimated states of health of the power supply and a plurality of threshold settings corresponding to each estimated state of health, wherein

the circuity is configured to access the memory to set the threshold based on the estimate health of the power supply.

13. The power supply unit of claim 1 , further comprising:

a light emitting diode (LED), wherein

the circuitry is configured to control the LED to output a notification and perform control to not discharge power from the power supply to the load to generate the aerosol when a short circuit of the power supply is detected.

14. A power supply unit for an aerosol inhaler, the power supply unit comprising:

a power supply configured to discharge power to a load for generating an aerosol from an aerosol source;

a connection interface, wherein the power supply unit is configured to be detachably connected to the load via the connection interface;

a sensor configured to output a value related to a remaining amount of the power supply; and

control circuitry configured to

control the power supply;

determine that a request for aerosol generation has been received;

detect, in response to determining that the request for aerosol has been received and before generating the aerosol, whether there is a short circuit of the power supply, based on a first output value which is an output value of the sensor obtained before discharging for aerosol generation, and a second output value which is an output value of the sensor obtained after the discharging; and

perform control to discharge power from the power supply to the load to generate the aerosol only when no short circuit of the power supply is detected, wherein

in a case that the short circuit is detected, the circuitry is configured to

detect that the type of short circuit is an internal short circuit in a case that a difference between the first output value and the second output value is greater than a threshold; and

detect that the type of short circuit is an external short circuit in a case that the difference between the first output value and the second output value is less than the threshold.

15. The power supply unit of claim 14 , wherein

the power supply unit includes at least a part of a circuit configured to electrically connect the power supply and the load, and

during the discharging, the control circuitry controls the circuit such that power per unit time which is supplied to the load is constant or variation in power per unit time which is supplied to the load is suppressed, and

the threshold corresponds to an amount of change of the value related to the remaining amount of the power supply and is set or corrected based on time for which the discharging has been performed.

16. The power supply unit of claim 14 , wherein

the power supply unit includes at least a part of a circuit configured to electrically connect the power supply and the load, and

during the discharging, the control circuitry controls the circuit such that power per unit time which is supplied to the load is constant or variation in power per unit time which is supplied to the load is suppressed, and controls the circuit such that time for which the discharging is performed does not exceed a predetermined time, and

the threshold corresponds to an amount of change of the value related to the remaining amount of the power supply in a case where the discharging has been performed for the predetermined time.

17. The power supply unit of claim 14 , wherein

the power supply unit includes at least a part of a circuit configured to electrically connect the power supply and the load, and

during the discharging, the control circuitry controls the circuit such that time for which the discharging is performed does not exceed a predetermined time, and

the threshold corresponds to an amount of change of the value related to the remaining amount of the power supply in a case where maximum power which can be supplied to the load has been supplied only for the predetermined time.

18. The power supply unit of claim 14 , further comprising:

a charger configured to charge the power supply in a case that external power is supplied to the power supply unit.

19. A power supply unit for an aerosol inhaler, the power supply unit comprising:

a power supply able to discharge power to a load for generating an aerosol from an aerosol source;

a switch configured to allow or shut off supply of power from the power supply;

circuitry configured to control the power supply; and

a sensor configured to output a voltage of the power supply, wherein the circuitry

determines that a request for aerosol generation has been received;

detects, in response to determining that the request for aerosol has been received and before generating the aerosol, whether there is a short circuit of the power supply, based on a first output value which is an output value of the sensor obtained before discharging, and a second output value which is an output value of the sensor obtained after the discharging, and the first output value and the second output value are closed circuit voltages of the power supply which are obtained after a predetermined period including 0 passes from when the circuitry sends a closing instruction to the switch, wherein in a case that the short circuit is detected, the circuitry distinctively detects a type of the short circuit based on the relationship between the first output value and the second output value, and

performs control to discharge power from the power supply to the load to generate the aerosol only when no short circuit of the power supply is detected, wherein

the circuitry is configured to

detect that the type of short circuit is an internal short circuit in a case that a difference between the first output value and the second output value is greater than a threshold; and

detect that the type of short circuit is an external short circuit in a case that the difference between the first output value and the second output value is less than the threshold.

20. The power supply unit of claim 19 , wherein

the predetermined period is set based on a time constant in a case where change of a closed circuit voltage of the power supply is considered in a primary delay system.