Patent ID: 7863775

Claim:
An apparatus for managing power in an electronic device, comprising: an operation module located in the electronic device and consuming power in response to a driving voltage, the operation module being configured to adjust a frequency of an internal operation clock in response to a performance limit signal; a fuel cell module including a fuel cell for generating a voltage and a fuel cell controller for monitoring the generated voltage; a battery module including a secondary battery and a secondary battery controller for monitoring a remaining capacity of the secondary battery; and a control module including: a power sensor module configured to sense an amount of power consumed by the operation module in real time, the power sensor module being coupled to a voltage terminal of the fuel cell module, a voltage terminal of the battery module, and a driving voltage input terminal of the operation module, a discharge module configured to provide voltage of the battery module to an input terminal of the power sensor module in response to a discharging control signal, and a charger module configured to convert voltage at the input terminal of the power sensor module or at an output terminal of the power sensor module into a charging voltage with a preset level so as to charge the battery module in response to a charging control signal, wherein the control module is configured to: acquire a generated voltage capacity of the fuel cell module and the charged remaining capacity of the secondary battery by exchanging data with the fuel cell module and the battery module via a data bus, generate the charging control signal according to the sensed amount of power consumed by the operation module, the generated voltage capacity of the fuel cell module, and the charged remaining capacity of the battery module, and generate the performance limit signal to the operation module if the sensed amount of consumed power by the operation module exceeds a sum of the acquired generated voltage capacity of the fuel cell and the acquired charged remaining capacity of the secondary battery.