Invention Grant
- Patent Title: Water removal features for PEMfc stack manifolds
- Patent Title (中): PEMfc堆叠歧管的除水功能
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Application No.: US11936633Application Date: 2007-11-07
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Publication No.: US08168340B2Publication Date: 2012-05-01
- Inventor: Lee C. Whitehead , Steven R. Falta , Thomas A. Trabold , Jon P. Owejan , Thomas W. Tighe
- Applicant: Lee C. Whitehead , Steven R. Falta , Thomas A. Trabold , Jon P. Owejan , Thomas W. Tighe
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Miller IP Group, PLC
- Agent John A. Miller
- Main IPC: H01M8/06
- IPC: H01M8/06 ; H01M8/04

Abstract:
A bipolar plate includes angled facets oriented to form V-shaped projections on the plate edge. Liquid leaving the reactant channels is drawn back into the V-shaped grooves of the projections, leaving no liquid to obstruct the channel exit openings. The bipolar plate includes one portion of the bipolar plate offset from another portion of the bipolar plate so as to expose the reactant channels. The liquid is drawn toward the end portions of the reactant channels by capillary forces, while the gas flows can exit near the beginning of the offset portion. A fuel cell stack includes angled facets that are rotated to lie in the plane of the bipolar plate edges. The edges are chamfered so the channel exit openings of the reactant channels are at the tip portions thereof, thus allowing the liquid to flow away from the channel exit openings and the gas to exit freely.
Public/Granted literature
- US20090117432A1 Water Removal Features for PEMFC Stack Manifolds Public/Granted day:2009-05-07
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