Flow Shifting Coolant During Freeze Start-Up To Promote Stack Durability And Fast Start-Up

Flow Shifting Coolant During Freeze Start-Up To Promote Stack Durability And Fast Start-Up

An auxiliary coolant system, for a fuel cell stack system, includes a reversible coolant pump, a control valve, and plumbing lines. The pump enables the reversal of the coolant flow direction in the fuel cell stack system. The auxiliary coolant system is in parallel with the primary coolant system,...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ZHANG YAN, FAGLEY JOHN C
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRICITY
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
TECHNICAL SUBJECTS COVERED BY FORMER USPC
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Beschreibung
Zusammenfassung:An auxiliary coolant system, for a fuel cell stack system, includes a reversible coolant pump, a control valve, and plumbing lines. The pump enables the reversal of the coolant flow direction in the fuel cell stack system. The auxiliary coolant system is in parallel with the primary coolant system, and communicates with the primary coolant system via valves. During start-up, when coolant flow is from right-to-left through the fuel cell stack system, one valve of the primary coolant system will be partly open and control the amount of cold coolant make-up from the primary coolant system to the fuel cell stack while the valve of the auxiliary coolant system will be controlling the temperature differential between the inlet and outlet of the stack.