CHARGING CIRCUIT AND METHOD FOR PREVENTING CHARGING POWER SUPPLY FROM REVERSELY CONNECTING

摘要

The invention discloses a charging circuit and a method for preventing charging power supply from reversely connecting in an electronic cigarette or electronic cigarette case. The charging circuit comprises a direct current input terminal, an unit for preventing charging power supply from reversely connecting, a charge management unit and a rechargeable battery. The unit is electrically connected to the direct current input terminal; the charge management unit is electrically connected to the unit and the rechargeable battery. The charging circuit and method according to these embodiments of the invention can effectively avoid the risk caused by the reverse connection of the charging power supply for the electronic cigarette or the electronic cigarette case; it also has the advantages such as low voltage drop and low power consumption.

主权项

1. A charging circuit for preventing charging power supply from reversely connecting applied in an electronic cigarette or electronic cigarette case, comprising:
a direct current input terminal, an unit for preventing charging power supply from reversely connecting electrically connected with the direct current input terminal , a charge management unit electrically connected to the unit for preventing charging power supply from reversely connecting and a rechargeable battery electrically connected with the charge management unit; wherein the direct current input terminal is configured to receive an input direct current from a charging power supply; wherein the unit for preventing charging power supply from reversely connecting is configured to prevent the direct current input terminal from supplying a reverse direct current for the rechargeable battery, wherein when the direct current input terminal supplies the reverse direct current, the unit for preventing charging power supply from reversely connecting is turned off so that the charging power supply to the rechargeable battery is cut off; when the direct current input terminal supplies a normal direct current, the unit for preventing charging power supply from reversely connecting is turned on so that the direct current from the direct current input terminal flows into the charge management unit via the unit for preventing charging power supply from reversely connecting; wherein the charge management unit is configured to detect charge voltage value and charge current value when the unit for preventing charging power supply from reversely connecting is turned on, to adjust the charged voltage to the rechargeable battery, and further to turn on or off the charge voltage according to detected result.