US 12,334,610 B2
Fuel cell system
Toshio Shinoki, Tokyo (JP); Masaru Shinozaki, Tokyo (JP); Junichi Nakazono, Tokyo (JP); Makiko Kise, Tokyo (JP); Nozomi Kasahara, Tokyo (JP); and Keijun Kasajima, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/793,411
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Mar. 30, 2020, PCT No. PCT/JP2020/014437
§ 371(c)(1), (2) Date Jul. 18, 2022,
PCT Pub. No. WO2021/199103, PCT Pub. Date Oct. 7, 2021.
Prior Publication US 2023/0041819 A1, Feb. 9, 2023
Int. Cl. H01M 8/0612 (2016.01); H01M 8/04007 (2016.01); H01M 8/04014 (2016.01); H01M 8/04119 (2016.01); H01M 8/04701 (2016.01); H01M 8/04746 (2016.01); H01M 8/2457 (2016.01)
CPC H01M 8/0618 (2013.01) [H01M 8/04022 (2013.01); H01M 8/04067 (2013.01); H01M 8/04164 (2013.01); H01M 8/04716 (2013.01); H01M 8/04761 (2013.01); H01M 8/2457 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A fuel cell system comprising:
a reformer which generates a reformed gas containing hydrogen by reacting hydrocarbon and moisture with each other;
a fuel cell stack which generates electric energy through electrochemical reaction of the reformed gas and an oxidant separated from each other at an anode and a cathode;
an ejector which, using, as a drive fluid, steam to be used as the moisture, sucks either a raw fuel containing the hydrocarbon or a recycled gas recovered from an anode exhaust gas, and supplies a resultant gas to the reformer; and
a vaporizer which generates the steam by vaporizing water, wherein
an operation temperature of the fuel cell stack is higher than a boiling point of water at an operation pressure, and
the vaporizer generates the steam through heat exchange with the anode exhaust gas before the recycled gas is recovered therefrom.