Efficient electronic cigarette charging device and method for using the same

1. An efficient electronic cigarette charging device, comprising an electronic cigarette case and a battery rod; the battery rod including a charging management unit and an electronic cigarette battery unit;

wherein the electronic cigarette case includes an electronic cigarette case battery unit, a current sample unit, a micro-control unit, and a voltage regulator unit;

wherein the voltage regulator unit is connected to the electronic cigarette case battery unit, the micro-control unit, and the charging management unit respectively, and the current sample unit is connected to the charging management unit and the micro-control unit respectively;

wherein the current sample unit is configured to sample actual charging current of the charging management unit, and the micro-control unit is configured to determine whether a difference between default battery constant charging current and the actual charging current is within a preset range, and is further configured to control transmission of a control signal to the voltage regulator unit to adjust a charging voltage outputted to the charging management unit;

wherein the voltage regulator unit includes a DC-DC output circuit and a voltage regulation output circuit, the DC-DC output circuit is configured to convert a power voltage provided by the electronic cigarette case battery unit to a stable DC voltage and output the stable DC voltage to the voltage regulation output circuit, and the voltage regulation output circuit is configured to regulate the stable DC voltage according to the control signal and then generate the charging voltage that is regulated;

wherein the voltage regulation output circuit includes a MOS transistor and a capacitor, a drain of the MOS transistor is connected to the charging management unit, a source of the MOS transistor is connected to the DC-DC output circuit, a gate of the MOS transistor is connected to the micro-control unit, one end of the capacitor is connected to the drain of the MOS transistor, and the other end of the capacitor is grounded; and

wherein the MOS transistor is configured to receive the stable DC voltage from the source thereof and receive the control signal from the gate thereof, and the control signal controls the conduction and cut-off of the MOS transistor, and hence controls the charging voltage.

2. The efficient electronic cigarette charging device according to claim 1 , wherein

control signal is a duty radio adjustable PWM signal;

and the voltage regulation output circuit is configured to regulate the stable DC voltage according to the duty radio adjustable PMW signal and generate the charging voltage that is regulated.

3. The efficient electronic cigarette charging device according to claim 2 , wherein, the micro-control unit includes a microcontroller and a first resistor; a type of the microcontroller is SN8P2711B; a PWM1 pin of the microcontroller is connected to one end of the first resistor and the gate of the MOS transistor respectively, and the PWM1 pin of the microcontroller outputs the duty radio adjustable PWM signal; the other end of the first resistor is connected to the source of the MOS transistor, a VSS pin of the microcontroller is grounded, and a VDD pin of the microcontroller is connected to a power signal Vbat.

4. The efficient electronic cigarette charging device according to claim 3 , wherein the current sample unit includes a sampling resistor, one end of the sampling resistance is grounded, and the other end is connected to the charging management unit and a P4.4 pin of the microcontroller respectively.

5. The efficient electronic cigarette charging device according to claim 4 , wherein the resistance of the sampling resistor is 1-2 Ω.

6. The efficient electronic cigarette charging device according to claim 1 , wherein the stable DC voltage is 5V.

7. The efficient electronic cigarette charging device according to claim 1 , wherein the MOS transistor is a P-type MOS transistor.

8. The efficient electronic cigarette charging device according to claim 7 , wherein a type of the MOS transistor is A03401.