Patent · US Active

Fuel cell system

US8247125B2 · kind B2 · utility

0Cited by

2References

5Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Thomas J. Diedrich · Menasha, US
Martin Heumos · Finning, DE
Gert Hinsenkamp · Tauberbischofsheim, DE
Patrick Mangold · Ulm, DE

Key dates

Filing date	Nov 12, 2008
Grant date	Aug 21, 2012
Priority date	—
Expiry date	Jan 11, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a fuel cell stack (10) of a fuel cell system that is to be hermetically sealed off from the environment after operation is ended so that only a finite amount of air oxygen remains in the fuel cells, thus preventing the fuel cells from excessively aging. According to the invention, locking means (26, 28; 32, 34) are provided that are disposed on or in an end plate (14) or distributor plate of the fuel cell stack (10). The locking means (26, 28; 32, 34) are therefore thermally coupled to the end plate (14) and may freeze up at cold ambient temperatures. In a preferred embodiment, the locking means (26, 28; 32, 34) comprise an elastomer body (32, 34) able to cover and uncover a channel (44, 46) in the plate (14).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.