About 73 results
https://drivepatents.com/patents/1071354 · 28 Dec 2005
A power supply is formed from a number of fuel cell elements (21, 22, 23; 31; 41) connected to a switch (SW1) to enable the number of elements operational in a fuel cell stack to be varied in order to sustain output voltage despite variations in the output...
https://drivepatents.com/patents/1074163 · 14 Sep 2005
There is provided a direct methanol fuel cell system 1 which sits stably and can reduce influence on a fuel cell stack 3 due to impact from around. The fuel cell system 1 includes: an aqueous solution tank 7 for storing methanol aqueous solution; a fuel ta...
https://drivepatents.com/patents/1076867 · 15 Jun 2005
The method involves evaluating the voltage (U 0) on at least one fuel cell element (14) in a fuel cell stack (12) to which the reformat (10) is supplied. The evaluated voltage on the at least one fuel cell element is the no-load voltage of the at least one...
https://drivepatents.com/patents/1078710 · 6 Apr 2005
A fuel cell system is disclosed, comprising, within a package, a fuel cell stack; a hydrogen-rich gas supply means configured to supply a hydrogen-rich gas; a combustible gas detector configured to detect leakage of a combustible gas which is the hydrogen-...
https://drivepatents.com/patents/1079145 · 23 Mar 2005
A cell assembly (10) includes a first unit cell (12) and a second unit cell (14). The first unit cell (12) and the second unit cell (14) are juxtaposed such that electrode surfaces of the first unit cell (12) and electrode surfaces of the second unit cell ...
https://drivepatents.com/patents/1079691 · 2 Mar 2005
A fuel cell generates electric power by the electrochemistry reaction of hydrogen and the oxygen in air. After the hydrogen discharged without being consumed of an anode is burned in a burner, it is discharged out of a fuel cell system. However, while acti...
https://drivepatents.com/patents/1081612 · 15 Dec 2004
To realize a polymer electrolyte fuel cell with an increased level of safety by providing a method for easily and accurately detecting a cross leak or a micro short-circuit resulting from the initial failure or the deterioration of durability, specifically...
https://drivepatents.com/patents/1084500 · 1 Sep 2004
A generation method using a fuel cell generation system, comprising the steps of: supplying a fuel gas 14a to a fuel electrode 21 through fuel gas passages 14 at a low pressure, supplying an oxidizer gas 15a to an oxidizer electrode 22 at a low pressure, g...
https://drivepatents.com/patents/1085363 · 28 Jul 2004
A functional test and demonstration apparatus for a fuel cell power system includes a control device, a fuel cell stack, at least one electric load, a hydrogen gas supply pipeline, an air supply pipeline, and a connection and display panel. The connection ...
https://drivepatents.com/patents/1086649 · 9 Jun 2004
A method for controlling the flow rate of an oxidizer in a fuel cell system having a fuel cell stack (1) being supplied with fuel and the oxidizer, a compressor (3) for supplying the oxidizer to the fuel cell stack (1), a back pressure valve (11) for contr...