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:
Dec. 09, 2003
Filed:
Sep. 12, 2000
Tsunemori Yoshida, Sanda, JP;
Katsunori Sugita, Sanda, JP;
Terumasa Yamamoto, Sanda, JP;
Masahito Kaji, Sanda, JP;
Nippon Pillar Packing Co., Ltd., Osaka, JP;
Abstract
In a separator for a fuel cell and a method of producing a separator for a fuel cell according to the invention, bondcarbon is used in which composition ratios are set to 60 to 90 wt. % (preferably, 70 to 87 wt. %) of graphite powder having an average diameter in a range of 15 to 125 &mgr;m (preferably, 40 to 100 &mgr;m), and 10 to 40 wt. % (preferably, 13 to 30 wt. %) of a thermosetting resin. The compound is previously cold-molded into a shape similar to a final molded shape. The preliminary molded member is then placed in a mold, and then molded into a separator of the final shape by applying a pressure of a range of 10 to 100 MPa. The surface roughness Ra of at least a portion of the separator contacting with an electrode is set to a range of 0.1 to 0.5 &mgr;m. According to this configuration, fluidity and moldability are excellent, the contact resistance can be set to a value lower than a requested value while ensuring strength sufficient for preventing the separator from suffering a damage such as a breakage due to vibrations or the like, and the low contact resistance can be stably maintained.