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Title:
BIPOLAR PLATE HAVING OFFSETS
Document Type and Number:
WIPO Patent Application WO2006031470
Kind Code:
A3
Abstract:
A bipolar plate (70) for a PEM fuel cell is disclosed. The plate includes a plurality of channels (62), wherein the ends of the channels are staggered. The plate also includes a plurality of tunnels (88), wherein the ends of the tunnels are staggered. The plate further includes a cathode and an anode, wherein a portion of the cathode overhangs a portion of the anode. These staggered/offset features allow for an increase the capillary meniscus of water droplets passing therethrough, allowing for a reduction in the pressure required to move the water through the cell and out to the header volume of the stack.

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Inventors:
BEUTEL MATTHEW (US)
DARGA DANIEL J (US)
Application Number:
PCT/US2005/031358
Publication Date:
September 08, 2006
Filing Date:
September 02, 2005
Export Citation:
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Assignee:
GEN MOTORS CORP (US)
International Classes:
H01M8/02
Foreign References:
US5750281A1998-05-12
US6410179B12002-06-25
US6773841B22004-08-10
US6699614B22004-03-02
US6406809B12002-06-18
US6348280B12002-02-19
US4758481A1988-07-19
US20040209150A12004-10-21
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