FUEL CELL SYSTEM HAVING IMPROVED STARTING UNDER FREEZING CONDITIONS

FUEL CELL SYSTEM HAVING IMPROVED STARTING UNDER FREEZING CONDITIONS

The invention relates to a fuel cell system, comprising: at least one fuel cell; a cooling device; at least one temperature sensor; and a control unit; wherein the cooling device comprises a coolant path for the flow of a coolant, a coolant pump, a heat releasing device, and a bypass, which can be o...

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Hauptverfasser: Kemmer, Helerson, Rink, Matthias
Format: Patent
Sprache:eng
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BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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creator Kemmer, Helerson
Rink, Matthias
description The invention relates to a fuel cell system, comprising: at least one fuel cell; a cooling device; at least one temperature sensor; and a control unit; wherein the cooling device comprises a coolant path for the flow of a coolant, a coolant pump, a heat releasing device, and a bypass, which can be operated by means of a bypass valve and which is parallel to the heat releasing device. A control unit is designed such that it senses the coolant outlet temperature or the coolant inlet temperature, identifies a first rising phase of the measured temperature during a start-up phase of the fuel cell system, monitors the measured temperature for a plateau after the first rising phase has been identified, identifies a second rising phase following the plateau, and, during the plateau, reduces a conveyed volumetric flow rate of the coolant in the coolant path and/or increases a current flow in the at least one fuel cell and/or reduces a cell voltage.
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subjects BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
title FUEL CELL SYSTEM HAVING IMPROVED STARTING UNDER FREEZING CONDITIONS
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