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:
Jul. 04, 2017
Filed:
Mar. 07, 2016
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Stefan Haase, Munich, DE;
Marcel Sterzenbach, Landshut, DE;
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Abstract
An operating method is provided for a fuel cell system with a radiator structure which is flowed through by ambient air and a fuel cell stack, at least part of the outgoing air flow of the fuel cell stack can be guided onto the radiator structure such that, at the radiator structure, the guided outgoing air flow causes an increase in mass flow of the ambient air through the radiator structure according to the jet pump principle. At least part of the outgoing air flow of the fuel cell stack can be guided through a gas expansion machine. The division of energy which is contained in the outgoing air flow and can be recovered in the gas expansion machine and/or at the radiator structure according to the jet pump principle is changed by an electronic control unit in a manner which is adapted to boundary conditions. This division is set and changed, in particular, using the temperature of the medium to be cooled in the radiator structure and the required electrical power of the fuel cell stack, by the pressure drop in the gas expansion machine being set by targeted setting of the flow conditions prevailing therein and/or the magnitude of the outgoing air flow which is guided through the gas expansion machine being set via a controllable bypass of the gas expansion machine.