Patent ID: 11923708
Assignee: SHENZHEN INNOKIN TECHNOLOGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  A | IPC A  H

Claim 0:
1. A method for charging a battery of an electronic cigarette through a charging circuit that includes a charging integrated circuit, an extended charging circuit including a first transistor, a second transistor, and a third transistor, and the charging circuit also includes a fourth transistor, the method comprising:
detecting, by a microcontroller, a voltage at the battery;
when a voltage detected at the battery is lower than 2.5V:
maintaining, by the microcontroller, an enabling pin of a charging integrated circuit at a low state to disable the charging integrated circuit from charging the battery, and
controlling, by the microcontroller, a 5V power source to charge the battery through the first transistor of the extended charging circuit and the fourth transistor that is connected with the first transistor in series; and

when the voltage detected at the battery is higher than 3.3V:
controlling, by the microcontroller, the enabling pin of the charging integrated circuit at a high state to enable the charging integrated circuit to output a voltage;
controlling, by the microcontroller, the first transistor and the third transistor in disconnected states, and the second transistor and the fourth transistor in conductive states; and
controlling, by the microcontroller, the 5V power source to charge the battery through the charging integrated circuit and the fourth transistor.