Dynamic output power management for electronic smoking device
AssigneeFontem Ventures B.V.
InventorsLik Hon, Zhuoran Li, Fucheng Yu
Life of this patent
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Abstract
A dynamic output power management unit for a heating circuit of an electronic smoking device includes a heating element connected to a power source via a first switching element. The unit has at least one voltage detection device to detect voltage values at various points of the heating circuit. A controller is configured to derive a resistance of the heating element, and estimate a discharge time or a power consumption value of the power source such that an energy converted in a period of time is substantially identical to a predetermined energy conversion value for a same period of time.
Claims12
1-9. (canceled)
An electronic smoking device comprising:
- an atomizer including an electrical resistance heating element in a heating circuit;
- a power source connected to the heating element;
- a reference element, and a switching element for switching the reference element into and out of the heating circuit;
- at least one voltage detection device to detect one or more of an output voltage of the power source;
- a voltage drop across the reference element;
- and/or a voltage drop across the heating element;
- and
- a controller configured to receive a first detection result from the voltage detection device;
- derive a resistance of the heating element;
- operate the switching element, receive a second detection result from the voltage detection device;
- and derive an active time of the heating circuit as a function of the resistance of the heating element and the second detection result.
An electronic smoking device comprising:
- an atomizer including an electrical resistance heating element in a heating circuit;
- a power source connected to the heating element;
- a reference element having a substantially constant resistance;
- a switching element operable to change from a first state to a second state to connect the reference element to the heating circuit and from the second state to the first state to disconnect the reference element from the heating circuit;
- at least one voltage detection device to detect one or more of an output voltage of the power source;
- a voltage drop across the reference element;
- and/or a voltage drop across the heating element;
- and
- a controller configured to change the switching element from the first state to the second state;
- receive a first detection result from the voltage detection device;
- retrieve a resistance value of the heating element from a memory;
- change the switching element from the second state to the first state;
- receive a second detection result from the voltage detection device;
- and derive an active time of the heating circuit as a function of the resistance value of the heating element and the second detection result.
Dependencies are inferred from the claim text.