AN ELECTRICALLY HEATED SMOKING SYSTEM COMPRISING AT LEAST TWO UNITS

摘要

There is provided an electrically heated smoking system comprising a secondary unit (105) capable of receiving a smoking article (107) having an aerosol-forming substrate. The secondary unit comprises at least one heating element (415) and an interface (109) for connection to a primary power supply (409). The secondary unit further comprises a secondary power supply and secondary circuitry. The secondary circuitry is arranged to control supply of electrical power from the secondary power supply to the at least one heating element in a pre-heating mode during which the temperature of the aerosol-forming substrate is increased to an operating temperature, to control supply of electrical power from the secondary power supply to the at least one heating element in a smoking mode, during which the temperature of the aerosol-forming substrate is maintained at substantially the operating temperature, and to control charging of the secondary power supply by the primary power supply, in a charging mode, so that the secondary power supply has sufficient charge to increase the temperature of the aerosol-forming substrate to the operating temperature in the pre-heating mode and to maintain the temperature of the aerosol-forming substrate at substantially the operating temperature during the smoking mode.