The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 2006
Filed:
May. 30, 2003
Alan J. Cisar, Cypress, TX (US);
Craig C. Andrews, College Station, TX (US);
Charles J. Greenwald, Bryan, TX (US);
Oliver J. Murphy, Bryan, TX (US);
Chris Boyer, Houston, TX (US);
Rattaya Chow Yalamanchili, College Station, TX (US);
Carlos E. Salinas, Bryan, TX (US);
Alan J. Cisar, Cypress, TX (US);
Craig C. Andrews, College Station, TX (US);
Charles J. Greenwald, Bryan, TX (US);
Oliver J. Murphy, Bryan, TX (US);
Chris Boyer, Houston, TX (US);
Rattaya Chow Yalamanchili, College Station, TX (US);
Carlos E. Salinas, Bryan, TX (US);
Lynnetech, Inc., College Station, TX (US);
Abstract
A bipolar assembly for use in electrochemical cell stacks, especially stacks operated at low pressure. The bipolar assembly is lightweight and provides a 'post-type' flow field that operates with a low pressure drop. The bipolar assembly comprises a gas barrier having an array of electronically conducting posts disposed approximately perpendicular to the gas barrier. Each end of the posts is in electrical communication with the surface of an electrode. Because the bipolar assembly separates a cathode from an anode, the posts contact an anode electrode on one end and a cathode electrode on the other end. The posts provide current conduction through the stack as well as provide the flow fields for the electrochemical reactants. Optionally, the bipolar assembly may contain cooling fluid channels formed by adding additional gas barriers to the bipolar assembly. The space between the gas barriers form a channel through which cooling fluids may be circulated.