Patent · US Active

Bipolar plate for fuel cells

US8354203B2 · kind B2 · utility

1Cited by

1References

5Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Florian Finsterwalder · Illerkirchberg, DE
Joerg Kleemann · Ulm, DE
Thomas Kunick · Illerkirchberg, DE
Markus Schudy · Ulm, DE

Key dates

Filing date	Apr 23, 2008
Grant date	Jan 15, 2013
Priority date	—
Expiry date	Aug 16, 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 bipolar plates for fuel cell systems. According to the invention, the component sheets of a bipolar plate (1) are formed for a welded joint (4, 5), such that between the profile regions (6) of the channel ducts (2), only small local surfaces remain as welding zones (10). The above is achieved by means of a corresponding shape of the profile molding (8, 9) of the component sheets. As a result of said reduction of the welding zones to small regions of the total surface, a larger proportion of the area is available for the channels (2), in other words, the channel cross-section and hence the coolant flow can be increased. At the same time the structure for the use of gas diffusion layers made from non-wovens, textiles or paper can be optimized.

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