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:
Mar. 09, 2004
Filed:
Jun. 28, 2001
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
The operating condition is set so that a phosphoric acid concentration, at which an amount of reaction product water to lower a concentration of phosphoric acid and an amount of water evaporated from phosphoric acid are equilibrated, can be not less than a reference phosphoric acid concentration to maintain desired performance, when a phosphoric acid fuel cell is operated under a condition where the reaction product water exists as liquid water. Specifically, an equilibrium phosphoric acid concentration-setting system is used to control, if necessary, gas flow rate control systems, gas temperature control systems, and pressure control systems so as to effectively prevent the performance of the phosphoric acid fuel cell and its power generation from being worsened. Accordingly, it is possible to suitably operate the phosphoric acid fuel cell at a low temperature without additional equipments.