Fuel cell system and gas leak detection method

Details Fuel cell system and gas leak detection method Fuel cell system and gas leak detection method

2004-06-17

2008-10-28

Kalafut, Stephen J. (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

C429S006000, C429S006000

Reexamination Certificate

active

07442452

ABSTRACT:
When a command for stopping electric generation by a fuel cell is issued, shutoff valves are closed (at time t1), and then a time-dependent change in pressure (P) in a closed passage area including the fuel cell is detected. A pressure change speed (dP1, i.e., an inclination of L1) when the pressure (P) is in a first pressure range (Ra) in the vicinity of atmospheric pressure and a pressure change speed (dP2, i.e., an inclination of L2) when the pressure (P) is in a second pressure range (Rb) that is on a high pressure side of the first pressure range (Ra) are detected, and both the pressure change speeds (dP1, dP2) are compared with each other. When a difference between both the pressure change speeds (dP1, dP2) is equal to or larger than a predetermined value (Pc), it is determined that there is a hole in an electrolyte membrane of the fuel cell.

REFERENCES:
patent: 6156447 (2000-12-01), Bette et al.
patent: 6492043 (2002-12-01), Knights et al.
patent: 6851298 (2005-02-01), Miura et al.
patent: 7087334 (2006-08-01), Sugino et al.
patent: 2001/0001287 (2001-05-01), Ueno et al.
patent: 2003/0077495 (2003-04-01), Scartozzi et al.
patent: A 03-250564 (1991-11-01), None

Affiliated with

Also associated with

Rating

Fuel cell system and gas leak detection method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fuel cell system and gas leak detection method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuel cell system and gas leak detection method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3990998