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:
Sep. 13, 2022
Filed:
Mar. 26, 2021
Applicant:
Honda Motor Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
Honda Motor Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 8/04089 (2016.01); H01M 8/04082 (2016.01); H01M 8/04223 (2016.01);
U.S. Cl.
CPC ...
H01M 8/04097 (2013.01); H01M 8/04201 (2013.01); H01M 8/04223 (2013.01); H01M 2250/20 (2013.01);
Abstract
A fuel cell system includes a fuel cell stack, a fuel gas supply channel, a fuel gas circulation channel, a circulating pump that is driven by a pump motor having no sensor, and an ECU for controlling the rotation of the pump motor. A method for operating the fuel cell system rotates the pump motor when starting, and stops the supply of electric power to the pump motor after the rotational speed of the pump motor has reached a given value, and determines, in an inertial period, whether or not the rotational speed of the pump motor has become equal to or lower than a predetermined value within a given time period.