Patent ID: 7876069
Filing Date: 2011-01-25
Classification: H01M,H02J,Y02B,Y02E,Y10S

Abstract:
1. An electric power unit connected to an electronic device that displays a power supplied state, the electrical power unit comprising: an electrical double-layer capacitor; a fuel cell for supplying power to the electric double-layer capacitor and the electronic device; wherein the fuel cell and the electrical double-layer capacitor are connected in parallel; and a controller for supplying power supply pulses by switching on an output switch when a voltage of the electric double layer capacitor exceeds an upper threshold and switching off the output switch when the voltage of the electric double layer capacitor reaches a lower threshold, and for intermittently altering output power of the electric power unit based on a time division approach to transmit a control pattern in accordance with an abnormality in the fuel cell; wherein an output power of the fuel cell is kept substantially equal to an average voltage of power required in the portable electronic device and kept small than a maximum power required, the electric double layer capacitor has a higher power density than that of the fuel cell, and the electronic device is allowed to display state information of the fuel cell by altering a displaying mode of the electronic device when the electronic device is supplied with power.