Patent ID: 7091625
Filing Date: 2006-08-15
Classification: H01M,H02J,Y02B,Y02E

Abstract:
1. A home-use fuel cell system for supplying power for power demands of a home, the home-use fuel cell system comprising: a fuel cell for supplying a base power portion as an output thereof; and a power storage device having a capacitor and a secondary battery, said capacitor and said secondary battery each being electrically connected to said fuel cell to receive and be charged by a charging power portion of said fuel cell output equivalent to the difference between the base power portion and an actual current power demand of said home-use fuel cell system, when said actual current power demand is less than said base power portion; wherein said capacitor and said secondary battery of said power storage device are connected to discharge a charge therein corresponding to a peak power portion of said actual current power demand equivalent to the difference between the base power portion and the actual current power demand of said home-use fuel cell system, when said actual current power demand is greater than said base power portion; wherein, when the output of the fuel cell is represented by P [W], the capacity of the power storage device is represented by Q [Wh], and the discharqe depth of the power storage device is represented by x [%], the following relationships are satisfied: