HYDROGEN SUPPLY SYSTEM FOR FUEL CELL AND METHOD FOR CONTROLLING THE SAME
First Claim
Patent Images
1. A method for accelerating activation of a fuel cell, the method comprising:
- a first step of supplying hydrogen to a fuel electrode of a fuel cell and air to an air electrode of the fuel cell and maintaining a cell voltage at an opening-circuit voltage of a predetermined level;
a second step of cutting off air supply to the air electrode;
a third step of reducing the cell voltage from the predetermined level of the opening-circuit voltage to a threshold level after cutting off the air supply to the air electrode;
a fourth step of supplying air to the air electrode again to increase the opening-circuit voltage to the predetermined level when the opening-circuit voltage is reduced to the threshold level;
a fifth step of supplying a sufficient amount of hydrogen and air to the fuel electrode and the air electrode, respectively, and operating the fuel cell in a constant current or constant voltage operation mode; and
a sixth step of repeating the first to fifth steps for a predetermined number of times.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides a hydrogen supply system including a plurality of hydrogen tanks, in which an in-tank regulator is mounted only on one hydrogen tank and a solenoid valve is mounted on each of the other hydrogen tanks so that a reduction in manufacturing cost is realized and hydrogen is stably supplied to a fuel cell stack by controlling the solenoid valves during driving, and a method for controlling the same.
8 Citations
13 Claims
-
1. A method for accelerating activation of a fuel cell, the method comprising:
-
a first step of supplying hydrogen to a fuel electrode of a fuel cell and air to an air electrode of the fuel cell and maintaining a cell voltage at an opening-circuit voltage of a predetermined level; a second step of cutting off air supply to the air electrode; a third step of reducing the cell voltage from the predetermined level of the opening-circuit voltage to a threshold level after cutting off the air supply to the air electrode; a fourth step of supplying air to the air electrode again to increase the opening-circuit voltage to the predetermined level when the opening-circuit voltage is reduced to the threshold level; a fifth step of supplying a sufficient amount of hydrogen and air to the fuel electrode and the air electrode, respectively, and operating the fuel cell in a constant current or constant voltage operation mode; and a sixth step of repeating the first to fifth steps for a predetermined number of times. - View Dependent Claims (3, 4, 5, 12)
-
-
2. A method for accelerating activation of a fuel cell, the method comprising:
-
a first step of supplying hydrogen to a fuel electrode of a fuel cell and air to an air electrode of the fuel cell and maintaining a cell voltage at a predetermined level, which is lower than an opening-circuit voltage, by applying a current load; a second step of cutting off air supply to the air electrode; a third step of reducing the cell voltage to a threshold level after cutting off the air supply to the air electrode; a fourth step of supplying air to the air electrode again and increasing the opening-circuit voltage to the predetermined level by applying a current load when the opening-circuit voltage is reduced to the threshold level; a fifth step of supplying a sufficient amount of hydrogen and air to the fuel electrode and the air electrode, respectively, and operating the fuel cell in a constant current or constant voltage operation mode; and a sixth step of repeating the first to fifth steps for a predetermined number of times.
-
-
6. A method for accelerating activation of a fuel cell, the method comprising:
-
supplying hydrogen to a fuel electrode of a fuel cell and air to an air electrode of the fuel cell and maintaining a cell voltage at a predetermined level, which is lower than an opening-circuit voltage; cutting off air supply to the air electrode; reducing the cell voltage to a threshold level after cutting off the air supply to the air electrode; supplying air to the air electrode again and increasing the opening-circuit voltage to the predetermined level; and supplying a sufficient amount of hydrogen and air to the fuel electrode and the air electrode, respectively. - View Dependent Claims (7, 8, 9, 10, 11, 13)
-
Specification